90s pop music equipment ipod/psp/mp3 - Mexican Dance Zhaizhu's log ...

90s pop music. .


New technologies and the emergence of the Internet era for the music industry has made a tremendous impact, after growing up in the 90 's era, their thinking, creativity, their youth shines brightly, and controversial, they mature and slightly alone, they would not like to miss, they grew up in musical tastes are also diverse and non-mainstream. They have been listening to a cassette tape or cd, they carry a psp and ipod, mp3, Mandarin, Japanese, European and American pop singing alternating in headset, they always replace a musical tastes and Idol ....


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ipod。.


ipod. .


Overview.


APPLE iPod was launched a large-capacity MP3 player produced by Toshiba 1. .8-inch disc drive as storage media at up to 10 ~ 160 GB capacity, for easily accessible storage of 2500 ~ 10000 first MP3 song, and it also has perfect management programs and innovative mode of operation, the appearance is also distinctive, APPLE can span across PC and Mac platforms, hardware product, in addition to MP3 player, iPod, you can also use the high speed mobile hard disk, you can display the contacts, calendar and tasks, and reading plain text e-books and listen to Audible audio books and podcasts (Podcasts).


Contents [hide]. .


IPod products.


Version of the introduction. .


New iPod.


Practical analysis. .


Design.


Use. .


The price of the iPod.


iPod serial number. .


Hardware and configuration.


Hardware description. .


Introduction to the software.


iTunes Integration. .


Third-party accessories.


Compatibility described. .


Use the method.


iPod products. .


Version introduced.


New iPod. .


Practical parsing.


Design. .


Use.


iPod prices. .


IPod serial number.


Hardware and software and configuration. .


Hardware.


Software. .


ITunes integration.


Third-party accessories. .


Compatibility narrative.


Use. .


[Edit this].


iPod classic (80GB, 120GB and 160GB);. .


* IPodnano3 (4 and 5 8GB, colors); 16GB nano4 (8 and 9, the colors, red for. ..


iPod Chronicles products. .


Volume edition in mainland China will not sell, 16G domestic only in part to large cities); nano5 (8 and 9 16GB, colors, yellow for Apple Store retail store special color models, red (PRODUCT) RED Special Edition.


* IPod shuffle (Second Generation, 1GB/2GB). .


* IPod shuffle (third generation, 2GB/4GB, 5 color).


* IPod touch (8G/16G/32G). .


*iPod touch 2(8G/16G/32G)。.


* IPod touch 3 (8G/32G/64G). .


Added by: iPod (PRODUCT) RED Special Edition (the Red model) is not a limited edition red iPod nano4 and shuffle, is Apple and Product Red organization operated a special version of the iPod, now buy the iPod (PRODUCT) RED Special Edition models, Apple will be part of the sale proceeds will be donated to the Global Fund to fight AIDS in Africa. So far, only sold in the APPLE Store only (such as: Beijing Sanlitun apple store). Since the Scheme has been introduced, (PRODUCT) RED Global Fund has donated more than 100 million U.S. dollars. Now, if you buy (PRODUCT) RED, can donate their love. .


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The first generation iPod (right). .


The first generation iPod launch caused a sensation at the time, it is not only beautiful, but also has a unique and user-friendly operation, and huge capacity, iPod to MP3 player brings a whole new way of thinking, followed by a similar product on the market, but the iPod still abound because of its unique style and has been sought.


The first generation iPod on October 23, 2001 release, a capacity of 5GB, 2002 年 3 月 21 Shelby 10GB version of the iPod, both equipped with APPLE's selections as scroll-wheel drive, just a thumb to complete to operate, 10GiPod also added 20 species of equalizer settings, iPod bandwidth is 400Mbps of IEEE1394 interface transmission, with the Mac operating system to manage iTunes, which was very advanced design, combined with iPod distinctive design, let it be to create another myth APPLE。.


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The second generation iPod (right).


Early first-generation iPod models designed for the Mac operating system, PC, difficult to use it, like the iPod, PC users do have a number of third party software to use with Apple to see the business opportunities which, in June 2002 17 released to support Windows operating system "Windows version of iPod", while increasing the 20G version of the iPod, since Mac and Windows version of iPod has 5GB, 10GB, 20GB three kinds of capacity, which is known as the second on behalf of the iPod, this iPod from a PC user APPLE camp one of the latest products。.


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Third-generation iPod (right). .


28 April 2003, with the opening of the iTunes store, Apple announced the release of the third generation iPod (left). This is a change in the iPod family members the greatest generation. Fully adopts touch.


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Ipod 4th generation.


Fourth-generation iPod (right). .


Apple computer in the 19 July 2004 released fourth-generation iPod. Steve · Steve jobs to new promotional method published in Newsweek (Newsweek) magazine interview and photograph on the cover, has published a new iPod.


The greatest difference with the older, is actually following the original in iPodmini the "ClickWheel" control design. "Play" and then back to mechanical button switch. Consumer criticism of some of the new iPod's backlight button three generations removed, but most users believe that, because the button to direct configuration around the circular control panel, there is no need to install backlight. .


Apple also updated the iPod software, more efficient use of battery, the battery life (play time) increased to 12 hours. In addition to other changes included in the top menu has joined the "random play" (ShuffleSongs) option, so that users can more easily when operating. But in most users ' requirements, Apple computer on 23 February 2005 made a new iPod firmware to allow future generations to three generations of the iPod to be able to use the new menu.


Initially, the fourth generation iPod only black and white screen, and with its predecessors have not pictures. First published two: ? 299 20GB and 399 dollars for 40GB (Apple Computer in February 2005 to stop selling 40GB version, sales of black and white 20GB version only). Black and white of four generations of iPod, a little thinner than the third generation (less than 1 mm), and provides ability to charge via USB interfaces. .


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iPodphoto / ColoriPod. .


Apple in 2004 28 October launched iPod photo (in sales a month later, the uppercase P with iPod series named rules in lowercase letters). It uses 65536 colors, color screen 220x176 point and have the store and display a JPEG, BMP, GIF, TIFF and PNG pictures. It's the fourth generation iPod thick 1 mm iPodphoto can time 15 hours of music playback. including the 40GB and 60GB iPodphoto initial version, the respective sales of 499 U.S. dollars and 599. .


On 23 February 2005, Apple discontinued sales include FireWire, USB and base 40GB model, introduced inexpensive 30GB model, and lowered the price of 60GB model. But with a photo, price after 60GB and new interface FireWire cable, portable shell and AV cables (accessories value approximately 0).


Apple on June 28, 2005 Updated product line, the iPod and iPod photo product line into one, all black and white screen models are upgraded to color screens. 20GBiPod now with all the features with iPodphoto, selling 9, and the same as the previous generation of black and white models. 60GBiPod the price has dropped, while cancellation of the 30GB (priced at 350 U.S. dollars) models. Apple Computer this series was renamed iPod. With the birth of new products, Apple updated iTunes to 4. .9 Version, and added podcast features. .


To manage iPodphoto photo gallery using iPhoto, Macintosh users and Windows users use AdobePhotoshopAlbum or Elements, or have some functional limitations of the Windows version of iTunes for free. IPhoto with new Mac computer comes with Windows users must use a functional limitations of iTunes or the purchase of Adobe products (with functional limitations of AdobeAlbum can free download).


From June 28, 2005 onwards, iPod and USB cable and power adapters bundled. Optional accessories include the popular base, FireWire connections (users can use the USB places), iPod video line (see photo on TV), as well as iPodCameraConnector (on a digital camera transfer photos to iPod, watch). .


The current iPod headphone jack/ColoriPod has little problems, so that the iPod even in lock switch turned himself suspended. This is because the auto-pause functionality that lets the iPod in the case of unplugging headphones. Using a third-party headphones contact switch often mistakenly record plug State (such as Sennheiser's model), but some users reported using Apple original headphones that experience this issue. This may be because the headphones Jack on the small metal plate met iPod metal back. Fast free solution is to use a small plastic wrap, to open a small hole in the above so that headphones inserted to, or from the hardware store to buy a small, thin plastic gaskets, so that looks better. .


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iPodU2 Special Edition (right). .


On 28 October 2004, Apple computer announced iPodU2 Special Edition. Black front panel with red click wheel (U2 's new album HowtoDismantleanAtomicBomb colors), silver chrome-plated with behind it the shell, carved with the famous Irish rock band U2 "," four member signature. In addition, iPodU2 Special Edition full replication of the fourth generation iPod20GB models. This iPod includes iTunesMusicStore coupons, discounts can be purchased include 400 U2's "Digital Set" - "TheCompleteU2". iPodU2 on June 28, 2005 to upgrade to color screen. .


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Harry Potter and the iPod (left, back of the figure). .


7 September 2005, Apple released a limited edition of Harry Potter · fourth-generation iPod, using laser etched on the back of the Hogwarts flag. [8] and the iPod launch at the same time, the sale in iTunesMusicStore · Harry Potter audio book. The only way to buy Harry Potter · iPod pattern is online, with 8 price and Harry Potter audio book · purchased together (October 12).


Fifth generation (old type). .


On 12 October 2005, Apple held a special briefing, Onemorething announced the fifth-generation iPod, play and H .264 MPEG-4.. movie New models have 30 and two 60GB, price and replaced.


It's screen can display 320x240, 65,536 colors, and can through the headphone jack or external AV jack on the base line of the movie on television. Now the screen size is 2. .5 ", Than the previous generation of iPod big 0. .5." .


It was reported that 30GB battery playback time of 14 hours, about 20 hours 60GB. Cinema, battery playback time will be reduced to 2 hours and 3 hours. Click wheel design is the same as the previous generation, but smaller than in the past. Headphone Jack are moved to the top of the iPod, but the lock switch on the right are moved to the left.


Such as the iPod nano, as it also has two colors: white and black. Also no longer remote control interface, but the latest universal base can use Apple's latest remote control. .


Fifth generation iPod along with a very thin plastic shell, the shell may be easily scratched iPodnano..


Fifth Generation (new). .


The new fifth-generation iPod in appearance and in old-type there is no difference, but there are some changes in specifications:.


Reservations 30GB models, but canceled 60GB, replaced by the 80GB models (the same thickness with the same 60GB). .


Battery life: Apple Web site that (battery fully charged) 30GB models music was extended to 14 hours of music playing time of a slide show extended to 4 hours, the movie plays time is extended to 3. .5 hours; 80GB models each for 20 hours, 6 hours and 6. .5 hours. 7. .0 release through iTunes to download new game iTunesStore (older version has been updated, you can also use) brightness than the old models increased 60%. You can set the "brightness" (the old version after updating, you can also use). Increase the "search" feature (currently only search in English). . .


iPod mini。.


Apple in January 2004 into the "mini" digital music player market, announced iPodmini, direct and Digital Networks and innovation ZenMicro the Rio Carbon competition. iPod mini and full-size iPod has a lot of similar features, but the lack of support for third-party accessories. It uses the smaller one. .67-Inch (diagonal) grayscale LCD screen version than in the past to reduce the number of lines shown on the screen when playing music restricted to only show the title and artist. .


iPod classic。.


Apple released a new generation of iPod classic, with 80GB or 160GB of storage, iPod classic lets you carry more music and video. It also has a lasting use of (available up to 30 hours of audio playback 2), the appearance of fine (and stylish all-metal design), and prominent personality charm (including the new Cover Flow interface). .


IPod mini micro hard disk as a storage device. It is an iPod shuffle iPod apart from outside one of the most compact, are basically is a standard iPod version of reduced shrink. But since the introduction of the iPod nano, her small status was broken, but the iPod shuffle is still the most tiny iPod's status.


The first generation mini. .


6 January 2004, Apple released the iPod mini. It has 4 GB of storage space and the selling price of $ 249 (at that time, only better than 15GB's third-generation iPod cheap). Critics say it's too expensive, but was unable to resist the overthrow of the epidemic, and the Apple store sales velocity is very difficult to keep in stock.


iPod mini uses the "click wheel", which appears in the fourth-generation iPod. Touch-sensitive wheel means that users only need to move on it will be able to select screen items, equipment, Menu, Back, Forward and Play / Pause button to become a part of wheel, users simply press the corresponding part of the wheel will start One of the features. The middle button is still used as a Select key. .


Apple iPodmini originally produced five colors: silver, gold, blue, green and pink. Silver is selling model, followed by blue.


Second-generation mini. .


In February 2005, the second generation iPod mini into the market with new models and upgrade 6GB 4 GB version. Most noteworthy is that the two models improves battery so that it can be used for 18 hours. In addition, they reduce the color of the shell (Apple computer stops selling gold), and other small parts of art. At the same time, the second generation of the iPod mini was cancelled by the previous generation of AC adapter or FireWire cable.


September 2005, Apple announced that iPodmini discontinued, released a new small-capacity iPod Product iPod nano. . .


IPod shuffle (lower left in the figure, the figure).


Apple Computer in the January 11, 2005 the Mac world Conference & Expo posted iPodshuffle, and accompanied by "Life is random" (official translation: life random interpretation) and "Give chance a chance" (unofficial translation: a chance an opportunity) for banners. iPod shuffle for the first time using flash memory (Flash Memory) as storage media models.Shuffle includes two models: 512MB (Save 120 to 128kbit/s encoding 4 minute songs) and 1GB (stock 240 songs). Unlike other iPod models, the iPod shuffle can play Apple Lossless and AIFF music files encoded in, because it uses SigmaTel processor does not support. A comment to the iPod model provides the best sound quality.


iPod shuffle does not screen, and thus only limited navigation options in the music room. Users can set the play order in iTunes or use the random (shuffle) order of play. Users can set each time you connect iTunes, the music library to the iPod shuffle in random fill. iPod shuffle weighs only 22 grams, slightly smaller than the size of a pack of gum. Transmission interface is only USB2. .0 a choice, not the original standard iPod use FireWire (FireWire/IEEE1394) transmission interface. With a range of other products similar to the iPod shuffle can also be used as USB mass storage device, like a USB drive.


Second-generation iPod shuffle (right, the maps middle). .


New iPod shuffle in appearance with very significant changes from the original rectangle reduced to approximate square shape, made of aluminum shell instead and add the "clip", can be very handy in dress, belt or trousers. Because the volume is reduced, cancel the original USB port, to transport, must be included with the dock cradle connected to the computer's USB port, and then the iPod shuffle is placed in the cradle it. ..


Third-generation iPod shuffle (right, the chart of the most right). .


New iPod shuffle has 4 GB capacity is available, with a maximum seating capacity of up to 1000 songs *, but you can also use many group playlists.


Can synchronize playlists on the computer at any time by activity or mood to choose the best mix of music. Add "VoiceOver" function, can tell you the name of each group play list, can speak fluently in 14 languages, to report the name of song and performer. .


IPod shuffle switch has three positions can choose: to pull to the left, your music will be played in a random way arbitrary; it is in the middle in order to play the songs, the dial to the right is closed. New iPod shuffle control switch position, and now is at the right headphones signal line; control switches to the new location of easier, so whether you're running, travel, or doing other things, can easily browse or playing music, you can turn on VoiceOver voice function, don't let the eyes distracted.


iPod nano. .


On 7 September 2005, Apple released the iPod mini, iPod nano. Using Flash instead of hard drive, iPod nano is 0. .27 in. (0. .685 cm) thick, 1. .5 ounces (42 grams), and the volume ratio of 62% smaller than its predecessors. It uses 32768 colors screen, able to display photos and USB2. .0 and computer connections. Headphone jack on the bottom. It retains the standard 30-pin base connection to compatible third-party peripheral. This is the first FireWire connection can not be used with any PC (Windows or Mac) sync iPod. .


IPod nano in the iPod OS adds several new features including new world clock, stopwatch and screen lock function. In a world clock, users can set the city in the world, and for each time zone setting of the alarm clock. You can automatically adjust clock for daylight saving time. Stopwatch function allows the user to click on the button to start the timing, click another button to stop. There is also a key to calculate a separate ring. Nano can save users from using stopwatch records of more than one time, so that users can compare different time. Screen lock feature allows users to set their iPod 4-digit password, when the screen lock is activated, the only forward and backward according to the keys. Volume control to enter a password number. .


On 7 February 2006, Apple introduced the iPod nano 1GB capacity, priced at $ 149 iPod nano at the same time there are black and white, including 1GB, 2GB and 4 GB capacities.


iPod nano 2. .


Compared to the new fifth-generation iPod, iPod nano in style has made great changes, discard the original acrylic and metal material, use aluminum shell, making the new iPod nano will not be the same as the old, and so easy to scratches than old-type thin about 0. .01 inch (0. .025 cm). In addition to this, the new iPod nano has a variety of color can be chosen: black, silver, pink, blue, green (not each capacity models are available in five colors).


The specification also made some changes:. .


Leaving 2 GB and 4 GB models, however, cancel 1GB models; 8 GB.


Screen brightness increase of 40% than the old model;. .


Battery life: Apple Web site that (battery fully charged) music was extended to 24 hours, the slide show with music playback time extended up to 5 hours.


Increase the "search" feature (currently only search in English);. .


In order to assist the "American Aboriginal AIDS/sexually transmitted diseases (STDs) three-year education and training assistance programs", part of the country has launched the "Red Special Edition" ("iPod nano (PRODUCT) RED Special Edition"), 4 GB and 8GB two models, all specifications are the same, there will be no change in the price, and each purchase iPod nano RED 4GB, Apple will donate $ 10 to the project.


iPod nano 3. .


Anodized aluminum front and rear polished stainless steel, four eye-catching colors and a larger, brighter display (in the history of the highest resolution of Apple display), iPod nano charm, inside and out with your impact is the optic nerve. With 320 x 240 resolution and wider screen of the iPod nano, compared to the previous screen brightness up to 65%. With Cover Flow, you can page through album covers as easily browse your music. A new way to view iPod nano all content in the . A battery is fully sustainable Play up to 5 hours of video or up to 24 hours of audio. Have lasting power and 6. .5 Mm ultra-thin body of the iPod nano, tall and small but magical. .


iPod nano 4 。.


iPod nano first attempt to use spindle design, highlighting the central part of the fuselage, while the edges smooth convergence to bring out the body of the small and large-size LCD screen. .


The new iPod nano generation products compared to before the biggest improvement is its built-in acceleration sensor chip, you can according to user's shaky and reverse, to change its State to play, this feature and iPod Touch some similar.


The new iPod nano's battery life of official time given up to 24 hours audio, video, up to 4 hours, this is because the new iPod nano's screen using the latest power saving mode due. .


And the previous generation iPod nano, new iPod nano than interface also some changes, as the use of vertical-screen design, in the menu list has also improved, in particular, is located on the bottom of the screen for 30% of the area, you can display the album cover or details Note, very convenient.


The new iPod nano also joined the new Genius feature, this feature can track the style of intelligent analysis system, which combined a DJ-style music player, this feature in iTunes, there are echoes. .


Nine colors, iPod nano in the history of the color with the largest number of time, in addition to the seven Rainbow colors, there is the classic Silver and black are available, fully meet consumer demand. The new iPod nano is equipped with headphones and decode programmes are not too obvious, so too the tone without significant changes, the new iPod nano still demonstrated a lack of emphasis on the treble, the bass performance, excellent sound analytical power. Original headphone, the new iPod nano is also compared to the previous generation of progress, the sound is more delicate.


The new iPod nano's price and upgrade of the problems have not increased but the new iPod nano's capacity has increased, the maximum capacity of 16GB and the year has been similar to the iPod Video, which makes the iPod nano has been so small the ability of people with admiration, especially in the current world situation Flash rampant, low price iPod nano also attracted much attention. .


IPod nano 5 bright and clean bright fifth-generation nano continuation of the previous generation of slender style and come and join the video recording, as well as carrying iPod label and real-time pause function FM broadcasting, as well as voiceover navigation (VoiceOver), built-in Nike + pedometer and slightly enlarged and improved .2 inch monitor 2., all integrated in a similarly thin aluminum shell. And genius has joined the mix track function.


iPod Touch. .


Apple releases latest-generation iPod, iPod Touch here.


Judging from the appearance, Touch is simply a streamlined version of iPhone, iPod Touch thickness of only 8mm, basically 60% of iPhone, than is currently the thinnest thickness of the new iPod nano only 1. .5 Mm. iPod Touch and iPhone the same width and length slightly shorter (110mm and 115mm), but higher than the standard iPod Classic 103. .5 Mm or higher.These are for iPod Touch or appearance size to be able to distinguish and iPhone. In the overall design of the iPod Touch and the iPhone have also. And other iPod Touch, the surface smooth side is connected to the rounded polished metal back cover. IPhone regardless of front tilt the screen edge so that it looks like in the picture frame. IPod Touch the edge of the screen you want to feel some sharp.


Touch and the iPhone screen size the same, but the edge of the iPhone's chrome replacement through oxidation of ferrous metals, the width of 2. .5 Mm. Total 5mm black border on both sides of the visual effect from the iPod Touch screen gives a little deeper inside the machine and the screen illusion.In fact, the iPod Touch and the iPhone's screen size without any difference between claiming that the iPod Touch, Apple display, how to, iPhone to 163ppi 160ppi, but this distinction does not distinguish between the naked. Both resolution 480x320.


iPod Touch's battery can support a nominal 22 hours audio playback, 5 hours video playback. Fast charging, a half-hour can be filled with 80%, fully charged you need to 3 hours. Endurance capacity is slightly worse than the iPhone, which can play audio 24 hours, video 7 hours. However, taking into account the thickness of the iPod Touch case, the gap is understandable. In addition, the open Wi-Fi browsing the web, iPod Touch's battery life capacity of 4 to 5 hours. .


And the iPhone, iPod Touch under positive only in the middle of a Home key. Touch of the keys are slightly smaller, lower depth. In addition, the top of the iPod Touch and a power/wake up button. However, and the right side of the iPhone on top, the iPod Touch at the top of the power key, the left to the right of free WiFi antenna location.


Since there is no built-in speaker iPod Touch, iPhone, therefore naturally removed the side volume, mute button. In Touch inside, only a simple unit operation can be issued a "bit" sound, all audio players will need headphones. Of course, iPod Touch and no microphone, camera, and the SIM card slot. .


Touch the bottom of the headphone connector is located adjacent to the iPod base data interface. IPhone Headset interface, some joints lax headset cannot be used. IPod Touch then changed this design, supports a variety of standard interfaces 3. .5mm headphones. Although the iPod Touch can use the iPhone's first wife headphones, but is unable to support their line control function, can only be achieved through the host to manipulate the music. Those who like outdoor use, hoping to facilitate the manipulation of the user may prefer the iPod nano, iPod Touch is designed for video playback and full touch control students. .


IPod Touch since the listing from the support for video output, the iPhone is through 1. .1 .1 version upgrade., supports this feature.


Previous iPod video output are connected via cradle or headset interface "iPod AV cable." But this time the upgrades, the new iPod Touch, nano and Classic to change the video output interfaces from the base to bear in support of composite or component output. .


In addition to the increase of the Debug console, iPod Touch Safari browser on iPhone with exactly the same. You can synchronize through iTunes on your computer, you can also add your Favorites to multiple pages, zoom. Of course, the iPod Touch is only within the scope of the WiFi hotspot to surf the Internet, unlike the iPhone version of the free.


iPod Touch body functions biggest shortcoming is the absence of Email. (Apple for the iPod Touch recently tailored a number of new applications, including the send and receive messages) while we can use the Safari login mail check mail, but allow users to have one less way to transfer files to it. For example, iPhone can view Word, Excel, PDF, etc. files, but not through the data line transmission. The easiest way, you can send yourself an attachment with Email, with the iPhone reception on the line.While in iPod Touch, this road would lead nowhere, Touch will not be able to use all kinds of documents. If you have a server, you can upload a document and then through the iPod Touch's Safari browser to find it, but for ordinary users. This greatly limits the scope of the iPod Touch, maybe this is what Apple wants to achieve results.


Advantages:. .


Wear-resistant metal housing and glass.


Slim, good design. .


Excellent media playback capabilities.


Safari browser support for rich Internet applications. .


Convenient for beautiful photo browsing.


Multiple Web applications can be installed. .


The bad:.


IPod operating system does not support the new series of slides and other functions. .


Polished metal shell does not have a scratch coat.


Does not support remote control or the remote control. .


A large number of delete PDA functionality.


Can not download the software. .


IPod Touch 2 g.


Compared to Touch 1. .


Advantages:.


Increase the speaker. .


Enhanced battery life time up to 36 hours of music video 6 hours.


CPU frequency increases response speed becomes faster. .


The back-arc side design looks better.


Increase the Genius function. .


Increase in the volume control buttons on the side.


Disadvantages:. .


System stability as before.


Screen color reproduction variation. .


Work than Touch 1 Gen to worse.


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Personal Digital Assistant AppleNewton work. ) Pixo libraries provide the user interface, although some from MacOSX iPodphoto combination of visual elements, such as "Aqua" style progress bar animation. Most of the iPod's user interface (except mini and photo of the style outside) the use of "Chicago", from 1984 was used for the original Macintosh computer.IPodmini EspySans "used" once the font is used for eWorld, Newton and Copland. Due to the use of some high resolution display, font, use MyriadPro iPodphoto Apple computer company fonts.


Shell button with the equipment, do not use screws and glue (although the fourth generation to use glue to stick the battery in the machine). Plastic front cover back cover clamping metal protrusions of Wai Yan. Maintenance can insert a small screwdriver carefully iPod from the edge of the metal surface grips Department forced open. .


IPod contains a small built-in speakers, so as to give the wheel a click and the alarm beep, but the internal speaker is unable to play music.


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ipod shuffle 3 second paragraph of capacity and price were: 2GB/448 yuan, 4GB 608 元. .


IPod touch3 2 capacity and prices are as follows: $ 32GB/2398 64GB/3198 element.


[Edit this paragraph]. .


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Reader, FM tuner and recording modules. The most well-known iPod accessory manufacturers including Belkin. Other accessories, such as the Bose speaker system and the BMW car audio interface for the iPod provides the bottom of the base and allow the user to put it on the base. These connections provide control and information as well as a voice signal transmission and operation of iPod accessories or power. Worthy of note that the user does not use user-replaceable batteries, replace the battery when the owner alone done any welding, will be provided to any official Apple warranty.(On the network, produced by the Neistat brothers named "iPod'sDirtySecret" movie, and put them in the .com to ipodsdirtysecret. informed consumers. But the fact is that Apple computer on 14 November 2003, announced a battery replacement program, while the Neistat brothers Web site was registered in November 20, 21, began to campaign. ）。.


Headset. .


All are equipped with the "iPod earbud" – use a special kind of white line to match the design of the original iPod. White line has become the symbol of iPod brand and has become an important feature of propaganda. While some headphones manufacturer more the declaration part of the production model is absolutely designed to cope with the iPod, for example, im616 AltecLansing-716.


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Reference:. .


What is the price of the ipod.


Novice to use ipod method. .


Extended reading:.


1. . Http://zhidao. . Baidu. . Com. .


2。.http://www。.adflow。.cn/site 。.


3. . Http://www. . Runrungo. . Com. .


4。.http://www。.allwiki。.com/wiki/Ipod 。.


5. . Http://www. . Apple. . Com. .cn / ipod. .


6。.http://www。.apple。.com 。.


7. . Http://www. . Mylile. .com / pinpai_view. . Asp? Id = 113. .


8。.http://www。.itunesfaq。.com 。.


9. . Audiobook download:. .


10。.http://www。.audiobooksfirst。.com 。.


11. . Http://freeclassicaudiobooks. . Com. .


12。.http://www。.audiobooks。.org 。.


Open Category:. .


Mp3, mp4, ipod, Apple, e-products.


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psp。.


Overview. .


PSP, PlayStation Portable, the full name of Japan is the development of multifunctional SONY handheld series, with games, music, video, and many other features. In addition, in many fields, some of the terminology and abbreviations for the PSP. For example, the personal software process (personal software process), the DOS operating system program segment prefix (the program segment prefix), etc..


Contents [hide]. .


Series of products.


PSP1000. .


PSP2000 。.


PSP3000. .


PSP GO 。.


Comparison of the model PSP. .


Function.


Hardware analysis. .


cpu 。.


Graphics Core. .


UMD 。.


Memory stick. .


Advantages.


Other information. .


The version number of the PSP.


PSP upgrade the system steps and precautions. .


PSP solution overview.


PSP cracking process. .


Personal software process.


Program segment prefix. .


Series of products.


PSP1000. .


PSP2000 。.


PSP3000. .


PSP GO 。.


Comparison of the model PSP. .


Function.


Hardware analysis. .


cpu 。.


Graphics Core. .


UMD 。.


Memory stick. .


Advantages.


Other information. .


The version number of the PSP.


PSP upgrade the system steps and precautions. .


PSP solution overview.


PSP cracking process. .


Personal software process.


Program segment prefix. .


[Edit this].


PSP2000. .


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Edit this paragraph]. .


PSP handheld video game: not only is the one you can play anywhere, anytime, listen to music, watching movies, Internet access, electronic books, play Simulator fashion digital handheld, and you can immediately have a digital camera and photography.


PSP dedicated camera with editing in the software, can support 320 × 240 ~ 1280 × 960 resolution JPEG still image photography, as well as 320 × 240 ~ 480 × 272 resolution, 15 ~ 30fps per second the Motion JPEG dynamic image photography, In addition to general photography features, and will provide static timing photography, surveillance photography, photo frame, and intermittent dynamic photography and photo-frame and other special modes. .


The shooting down of a photo or movie will be stored in the MS PRO Duo memory stick, which is accessible via the built-in feature to browse, edit, and theme effects processing, so that the player can take photos or film, plus a variety of transition, effects, graphics, music, and sound effects, such as pasting pictures or movies, etc., and the theme can be output to the PC to watch (photo format JPG, AVI movie output format).


GPS. .


PSP dedicated GPS global positioning parameter (for model PSP-290) as follows:.


Received signal frequency 1575. .42 Mhz (L1 band, C / A code). .


Receive signal mode 20 channels.


Received signal sensitivity -153dBm/-140dBm. .


Positioned update takes about 1 second.


Positioning accuracy of 5m (2DRMS,-130dBm). .


Overall dimensions of approximately 45 × 41 × 17mm.


Weight about 16g. .


Content of the GPS receiver and ingathering box.


GPS-290 is the SCE (Sony Computer Entertainment) introduced the use of specialized counterparts PSP GPS global positioning device (* 1), 290 is its number. Following the PSP, after a special camera, GPS global positioning in turn once again expanding PSP's in the world. From the practical tools and some idea of the past may be unrealistic games, PSP's dedicated GPS global positioning system will allow more impossible possible.Although the PSP will also be able to use other GPS devices (* 2), but the official GPS-290 use more simple and relatively common GPS receivers, its price is undoubtedly has advantages.


PSP GPS global positioning special appearance in the past, like the microphone and camera, PSP through USB interface to connect the upper, upper transparent acrylic panels played antenna function, the left screw were fixed. .


1: GPS, known as Global Positioning System, that is, the global positioning system (GPS). In the 1970s by the United States Navy, and set up, it can be one of the Earth's surface, the vast majority (98%) to provide accurate positioning, velocity and high-precision time standard. The system consists of 24 satellites in space GPS satellite; ground 1 master stations, 3 data injection points and 5 stations, as well as user-end GPS receiver. Just at least four satellites which can quickly determine the client location on earth and altitudes; can connect to the satellite data received more out of position more accurate decoding. (Civil positioning currently free). .


GPS system has many advantages as follows: 24 x 7 x 365, free from any influence of the weather; global coverage (up to 98%); high-precision 3-d speed timing; quick, time-saving and efficiency; widely, multi-function; removable positioning; different from the double positioning system receivers in use does not require any signal increased invisibility, improves the effectiveness of its military applications.


2: PSP on the use of other types of USB devices, usually the way DIY GPS cable (requires hands-on ability of the player operation), and then use the cable to connect the PSP to use other GPS. Unofficial unofficial programs use GPS to observe the map, or positioning. .


[Edit this].


High-performance CPU and embedded CPU core in the DRAM. .


In order to enable the 3D function near PSP PS2, SONY for the PSP is equipped with two R4000 CPU core is MIPS technologies .R4000., developed by RISC (reduced instruction set) processor. One of the two R4000 PSP CPU Core processor frequency of 333MHZ, its system bus with 128BIT (Note: that is, with the memory or external circuit connection bus) through it with Media Engine, Main Memory, Graphics Core1 & 2, VME (Virtual Mobile Engine), and DMAC. The entire data transfer operation in the DMAC - Direct Memory Access Controller under the control of the.CPU in addition to the data transfer begins and ends at the point of disposal, during the transfer process CPU can carry out other work. In this way, most of the time, CPU and input and output are in parallel operation.


Therefore, the entire computer system efficiency is improved. . It is the role of PSP in the CPU and through it to Optical Disc System, I / O devices connected to read and process Optical Disc System, I / O devices (such as the handle, display, U **, etc. interfaces are I / O device) information] link. .PSP CPU Core1 integrates I-Cache (instruction cache specific capacity is unknown), D-Cache (data cache specific capacity unknown) and FPU, VFPU (Vector Unit).. PSP 3D CPU Core computing power of the major sources of the FPU and VFPU both vector floating point unit, its capacity has reached 2. 6GFlops (in a 3D-CG Extended Instructions-3D instruction set extensions to work when the value), which is already reached P3 733 floating-point computation of the (this is the instruction set plus the work of the SEE value is 2.. 93GFLOPS (SSE)) Many people say that PS2's GS to support the special effects so little, why the game has so many in fact do not support the special effects because the EE of the FPU and VUO + VU1 contributed to EE, the total capacity of the floating-point operations 6. .2 GFLOPS of floating-point capabilityThe PSP 's. VFPU corresponds to EE's VUO + VU1, so don't look at the Graphics Core does not support a lot of special effects, but you can rely on the FPU and VFPU to implementation does not support special effects, many people say why don't you support in the Graphics Core, because in it now technology has not let GPU can ability to simulate effects, even if it is nVIDIA's GeForce series or ATI's RADEON series are only on special effects for programmatic control. Of the additional effects, such as the new version DIRECTX add new effects must be to get a new version of the graphics card to support this DIRECTX, but not like the PC game's graphics as a new generation every 6-8 months. And the GPU than the CPU floating-point operations although high, but there are limitations. So SONY is a very wise choice - the use of high floating point GPU to simulate the effects. .


PSP CPU Core role is to advance the polygon 3D operations such as generating and simulation of the effects, it's the kernel integrated 30MB DRAM main memory so you can accommodate more polygon data with high resolution textures, main memory bandwidth of up to 2. .6GB/sec.. PSP CPU Core with its 128-bit DRAM bandwidth of the bus and give full play to the PSP connected to the CPU Core of ultra high performance (Note: although it is a built-in memory, but still in need of bus connected to it). The advantage of embedded memory CPU can directly access memory, reducing memory latency and high bandwidth. . Also a R4000 is called Media Engine-media engine is, by definition he is the media extract and process the sound and do I / O management, and not to do 3D operations. . So it can not participate in 3D operations, many websites that two CPU can collaborate to 3D computing is wrong. Because it is not integrated FPU VFPU (does not rule out that my understanding is wrong).It is the same frequency, and PSP 333MHZ CPU Core shared 128BIT front side bus, embedded DRAM, DRAM bandwidth 2MB is 2. .6GB/sec, it is mainly used as media decompression buffer and audio storage. MPEG4 unzipped it to complete.


. .


In order for the PSP 3D function more coordinated SONY for the PSP is equipped with the same amount of CPU and GPU. Graphics Core 1 mainly geometric operations.


3D Curved Su *** ce +3 D Polygon (support for 3D surface and 3D polygon engine operation) Compressed Texture texture compression (this is very important, but technology, this technology can be in a limited memory and memory space, the store more texture, texture Compression can also reduce the usage of main memory. because when the memory is not enough, that is, the system will overflow texture texture stored in main memory..


Texture compression also can effectively reduce bandwidth usage. Since SONY did not explain the specific compression ratio, it is estimated that the texture compression technology S3TC. Here to introduce S3TC texture compression ratio in 8BIT colors is 2: 1 16BIT colors is 4: 1 24BIT colors is 6: 1) Hardware Clipping hardware tailor (simply put, the crop is to bring the object falls on the screen on the outside part removed, so that you do not need to deal with things, saving handling capacity) are Morphing, Bone and skeletal animated deformation. . They are very similar technology, are more fluid movement to the role, Morphing enables developers to create real waves and surface waves, etc., or to make shapes from a triangle group into another shape, leading to smoother The skeletal effects of actions [the right example of Figure 1 is the deformation]; Bone (8) so that programmers can use the eight joints of each "bone" to create realistic character motion and deformation does not occur when the joint exercise to the role of the natural movement of more real. .Hardware Tessellator is a hardware polygon Tessellator segmentation capabilities, with a high order of surface geometry so that the game's original simple model to become a more sleek and more accurate. It is added to the engine after we can use LOD (or known as HIGH ORDER SUFACE), depending on the object and the viewer's distance, using wire frame 3D models of different density. Since the introduction of LOD, the number of polygons in the scene will be lower than the previous substantially, but the picture quality will not decline significantly, and the hardware can be tailored to work as polygon reduction efficiency increases. It is DX8. .0, OPENGL 1. .4 DX and when to OPENGL in, home console, only X-BOX's NV2A hardware support this feature.However this technique in the PC GAME is not widely used, although there is a hardware support in PC GAME open this calculation function is [representatives of this class of technology such as ATI's TRUFORM].


Graphics Core 1 support Bezier B-Spline (NURBS) (Bezier curves NURB * modeling), ** 4 × 4,16 × 16,64 × 64 sub-division is a sub-model (N * N the greater the curve The more smooth the surface), reduce program / data and reduce memory footprint & bus traffic (which is similar to ATI's HZPER technology can be used to reduce the bandwidth utilization.Its specific mode of operation-there is no detailed description).


PSP Graphics Core 1 looks more like a geometry calculator. .Personal feeling its functionality closer to Vertex Shader PC graphics cards, the vertex shader [Note: what is a Vertex Shader (vertex shader)? — Vertex (vertices) is a computer graphics is one of the most basic element, three vertices as a triangle can be connected to form a surface in three dimensions, each node has its own coordinates (xyzw) and color values of the data on the Vertex Shader (vertex shader) at the software layer, is a series of vertex data processing instruction programs, hardware is to execute these Vertex Shader program processing unit], but some functionality may be slightly weaker . .


2 the name of the Graphics Core Rendering Engine called the ' + ' Su * ** ce Engine ' (the rendering engine and the surface of the engine), whose main role is to render and hardware T&L (hardware transform and lighting) this technology can be an object without increasing the polygon 3D surface model more accurate and more sleek and immediate handling of light and lively, light source produces a more realistic reflection of light effects, it is in the PS2 's by EE VUO + VU1. It also support surface rendering. 128BIT Graphics Core1 and 2 are the core of the operating frequency is 166MHZ 256BIT data bus width to connect the embedded style 4M DRAM. .


DRAM bandwidth is 5. .3GB/sec. Graphics core2 pixel fill rate for 6 million per second 6 million, each clock cycle of texture mapping is the number 4, 4 pixel pipelines, mode 4 * 1 that each pixel lines with TMU unit (texture mapping unit) is 1. Many people think that when the PSP in a number of texture pixel fill rate to fall, which do not have our hearts, and did not even think of Graphics Core2 support Pixel Shader (but do not know version) [Note: What is Pixel Shader (pixel shader ) - the Vertex (vertices) are vertex shader dealt with, will be to setup (set) engine into two-dimensional coordinates of points on the screen (called fragment (OPENGL in it is called) or pixel (D3D in it is called) - that is, pixels), pixel contains information similar to the vertex, is a color, depth, coordinates, etc.. .Pixel Shader (pixel shader) at the software layer, is working on the pixel information processing instruction program on hardware Pixel Shader is executed (vertex shader) unit of pixels.] Shader is mainly responsible for .Pixel. generated special effects and Texture synthesis (tile), so they do not have more than one cell to TMU. synthesis mapping for both PSP light controlled pixel level so that the PSP can better performance in the Shui, metal surface physical effects such as reflection.


Vertex Shader and Pixel Shader two in the console, only X-BOX's NV2A support, was widely supported in games such as the ring of water, the protagonist commandos body armor metal. . This is not PS2, but the senior function. . Example of Figure 2 as following diagram. . Graphics Core2 maximum polygon count for 33Mpolygon/sec (T & L) for the PS2 in the half. . But Do not look much worse performance than the PS2, but do not forget the PSP's resolution is 480 * 272 and 4. .5 inch screen, even if the polygon count and texture size is 1/3 you see it ^ _ ^. they work together.. output is Graphics Core 2 's work, its maximum output, the output signal 24BIT color to the RGBA it has better color reduction. [Note: do not rule out the use of a similar Graphics Core2 NVIDIA Shading Rasterizer (NSR) technology, NSR to the real material properties to per-pixelshading effect as far as possible, that is, Pixel Shader processing Pixel Sha ding to the effect (but only close to it). .NSR each pixel can be dynamic shadow processing possible, making complex screen now has a wealth of detail; bump mapping features such as pixels can be used to achieve more exciting Visual effects, such as a bump map. .NSR allows software developers real-time lighting pixels.. previous graphics solution using lighting tile or vertex lighting, because this option causes to improve performance and the quality and accuracy of losses, forcing the user to be in real-time rendering and full function to choose between the rendering. Developers no longer have to rely on the basic multi-texture processing to deceive their eyes, because the real-time according to pixel shading features to 3D elements both in appearance and behavior, and real-life counterparts very similar. Therefore, when the PSP in a number of texture pixel fill rate will not fall. Use NSR, timber lines look * really, lighting objects, not only in bright light emit faint light, but also exposure to the * real shadow, and make the water ripples and waves more natural. Function for lighting by pixel than in the past not only use all the lighting method is more accurate and flexible, and will not reduce the real-time performance..


[3]。.


. .


Memory stick M2.


This M2 Memory Stick Mirco SD card with similar ultra-small circuit design, specifically for high-capacity, removable storage requirements of small volume, weight only 16 grams, the external dimensions of 15 × 12. .5 × 1. .2 Mm, volume about PSP1000-PSP3000 baton used by a quarter. .


By M2 adapter, M2 memory stick can be "avatar" has become a normal memory stick (SAP), used in the Sony PSP2000 PSP1000, as well as the PSP3000.


[Edit this paragraph]. .


Edit this section].


PSP3000 SN code location. .


Dated 3000.


U.S. Edition 3001. .


O version of 3002.


Taiwan Edition 3003. .


Euro 3004.


Korean edition 3005. .


Gangban 3006.


Spanish version of 3007. .


Portuguese Edition 3008.


China 3009. .


Russian version of 3010.


In theory, PSP no matter where available land is, the hardware configuration is no different. UMD game regardless of where the sale can be in any version of the PSP to run; but UMD movies can only be run on a specific version of the PSP, can not cross. Different versions of the PSP also has a difference, that is the European version and the North American version of the x key and o key role and Asian versions of the opposite, that is the European version and U.S. version of "X" key is to determine, "O" key is canceled. .


。.


A brick! ! . .


3. see: for the user.


4. . Please view the upgrade instructions, following the usual steps. .


Upgrade steps:.


1, first download the system or extract the patch. .


2 set the UPDATE folder and drop it onto the PSP/GAME,.


3. . In the PSP game system or running patches. .


4 press the X key to start the upgrade, 6 seconds after completion of the automatic restart of PSP.


5. . Upgrade successfully. .


6 Note: Please make a patch to an existing system, then upgrade the next system.


. .


Amazing battery, flashed the self-made systems become something easy and without any risk, PSP break into the golden age.


Sony on the board as to modify the motherboard model TA088-V3 or later (some 2000 and all of 3000) of the PSP system does not use Pandora's battery, the system can not brush was made only through the system of virtual self-contained system vulnerabilities way to run the self-made software, UMD image. .


At present, the PSP1000, 2000, and 3000 have been cracked. Main-system (corresponding to use Pandora battery 1000 and 2000 non-v3) is the M33 (maximum is 5. .00M33-6) and GEN (maximum is 5. .50GEN-D3); virtual self-made systems (corresponding 2000v3 and 3000) 5. .03MHU (maximum is CFWE3. .6); and 5 .03GEN (maximum is 5. .03GEN-C); they are based on 5-based Davee. TIFF images 03 system vulnerabilities 5. .03 ChickHEN (which can not be higher than 5. .03 On a system running, the current system version than 5. .03 The 2000v3 and 3000 still can not crack). .


In response to the cracked, SONY PSP games improve version requirements, a considerable number of new maps force the system to version 5. .55 or higher, to the extent that these games are not ISO has homemade systems or virtual self running on your system. In response to SONY in this policy, the PSPGEN has developed GAME DECRYPTER Yoshihiro (latest version v4), to be able to decrypt the system version requirements for a maximum of 6. .10 game, makes these games in the crack in the existing home runs in the system. (Latest 5. 50GEN-D2 and 5. .03 GEN-B can now be run directly without decrypting the High System version of the game). .


2009 October 1, PSP GO on sale, the built-in battery, adopted by the higher safety factor motherboard, making the PSP Go is quite difficult to crack. (But now has been rumored that the author of the 5. .03ChickHEN Davee has developed a system based on PSPGo6. .10 procedures of HEN makes the PSPGo can run homebrew).


. .


Dark_AleX in DAXZISO bring our joy).


2006-5-27's first direct-reading chip Undiluted Platinum PSP released! . .


2006-5-30 DEVHOOK latest development release of information (number of unremarkable intelligence, just a week after ...).


2006-6-1 PSP upgrade to 2. .71. .


DEVHOOK era.


2006-6-6 DEVHOOK 0. .41 Release (think about it, SONY more hate BOOSTER). .


2006-6-9 0 .41A DEVHOOK.. release.


2006-6-13 DEVHOOK 0. .41 B release. .


2006-6-0.14 DEVHOOK .41C release.


2006-6-15 DEVHOOK 0. .41 D release. .


2006-6-28 2. extract the firmware can be part of .71.


2006-6-29 Dark_AleX release 2. .5 And 2. .6 Downgrade tools (from, 1. .5 Cheaper ...)。 .


2006-7-0.5 DEVHOOK .42 launched.


2006-7-6 Dark_AleX publishing tool 1. .50 Drop back to 1. .00 (Leisure ...)。 .


2006-10-7.2.2 .60/.71 firmware decryption succeeds (everyone craned her neck waiting for the DEVHOOK update).


2006-7-11 Devhook0. .43 Version released (can simulate 2. .60). .


2006-7-14 Devhook0. .44 launch (emulates 2. .71, finally the system and the most recent synchronization).


2006-7-15 Daek_Alex create custom firmware The proof of concept. .


2006-7-15 PSPVBA: GBA emulator .0 .1 v1.. (expecting for too long ...).


2006-7-20 Devhook0. Version .45 released. .


2006-7-30 Devhook0. .46 launch (brush machine).


2006-7-27 PSP firmware upgrade 2. .80 Version of the official release (unfortunately, this DEVHOOK not keep up, and announced its withdrawal from devhook on the production). .


2006-7-31 GBA emulator PSPVBA .2 .3 1... ".


2006-8-23 GPSP release, announced GBA emulator perfect. .


2006-8-28 Fanjita making PSP2. Hello World .8 self-made program ran successfully.


2006-9-1 Eloader for 2. .71 Open. .


2006-9-2-2. .71 edition PSP successfully downgrade.


2006-9-6 Eloader 0. .9. .8 Release FOR 2. .60. .


2006-9-11 at GBA emulator latest version 0 .7 GPSP...


2006-9-22 Eloader 0. .9. .9 Release FOR 2. .70 / 2. .71. .


2006-9-23 Dark_AleX Homebrew Enabler for announced 2. .71 (free-running Eloader program).


2006-9-24 Dark_AleX officially announced the Devhook Launcher Port to v2. .71 (Mean 2. .71 Cracked). .


2006-9-25 Dark_AleX announced FOR HEN, 2. .71B2.99% success rate.


2006-9-30 Dark_AleX released Homebrew enabler vC, can run 1. .5 Homebrew. .


2. age: .71SE.


2006-10-8 Dark_AleX statement 2. .71 Modified version of the firmware to run homebrew directly, naming 2. .71 SE. .


2006-10-2 .71SE 9...


2006-10-252. .71 SE-B released. .


2006-10-28 for free disk boot, 2. .71SE-B2 officially released.


2006-11-4 TA-086 motherboard mystery debut. .


2006-11-09 2. .71SE-B3 official release, take a photograph of looks first to crack.


2006-11-19 DARK_ALEK let it be, 2. .8 X can be simulated. .


2006-11-21 PSP firmware FLASH 2. .80 0 has been able to write to.


2006-11-21 PSP Firmware 3. .00 System SCE official available for download. .


2006-11-22 PSP firmware 3. .00 system are exported.


2006-11-22 PSP Firmware 3. .01 System SCE official available for download. .


2006-11-23 2. .71/2. .80 hybrid system release.


2006-11-25 Booster announced the return of crack lineup. .


2006-11-27 2. .71SE-C officially released.


2006-11-292. .71 SE and 3. .00 Mixed release. .


Unknown ages (3. .XX era):.


2006-11-30 Devhook0. .50 Release, 2. .8 X cracked (though not yet mature, but we have reason to believe it and Devhook0. .3, Is a legendary start). .


2007-1-27 PSP full open! 3. .03 downgrade packages tutorial completely stupid.


2007-1-30 PSP how to crack, 3. .10 New release. But soon came the 3. .10 Version of the news has all been overcome, Sony shows that will not give up, to continue to offer 3. .11 Version. .


2007-7-24 Sony (SCE) official release PSP system firmware 3. .52..


2007-7-26 Team M33 made the formal release system 3. .52 M33. .


2007-7-30 Team M33 release system upgrade patch 3. .52 M33-2 (system interface culture).


2007-8-20 Team M33 upgrade officially released patch 3. .52 M33-3. .


2007-8-21 Team M33 release system upgrade patch 3. .52 M33-4.


2007-8-23 Team C + D official release generic anti-bricks / Downgrader Pandora's battery - magic battery release. .


2007-9-11 Team M33 officially released version PSP-2000 first self-made systems 3. .60 M33.


2007-9-11 Sony (SCE) official release of PSP 3. .70 Version of system firmware (also support the PSP-1000 and 2000). .


2007-9-20 dated PSP2000 common Edition on sale.


Close to the perfect time:. .


2007-9-24 Team M33 release homemade systems 3. .71 M33.


2007-10-05 magic battery V3 (Cemetery v3) release, support for thin plane screen. .


2007-10-29 magical battery maker to add support for new 1200MAH battery (battery before you can use thick).


2007-10-30 Sony (SCE) official release of PSP 3. .72 System firmware. .


2007-11-01 Team M33 release system upgrade patch 3. .71M33-3.


2007-11-29 Sony PSP system version upgrade again, the new version number is 3. .73 And upgrade the region only in Japan. .


2007-12-13 official release 3. Dark_Alex .71M33-4 upgrade patch and release 3. .71M33-4 update content.


2007-12-18 Sony officially launched in Japan, PSP 3. .80 Version of firmware. .


2008-1-14 released PSP 3. .80M33-2 self-made firmware.


2008-1-28 PSP 3. .90 Firmware release. .


2008-2-1 release PSP 3. Dark_AleX .90 M33-system.


2008-02-04 update 3. .90 Release certain amendments BUG. .


2008-02-14 Dark Alex releases 3. .90M33-2-system.


2008-03-31 Dark Alex releases custom firmware the latest version of the system 3. .90 M33-3. .


2008-6-21 SONY release 3. subsequent improvement system has .92 3. .95, in fact, there is no difference.


2008-10-15 SONY officially on sale PSP-3000, equipped with the system 4. .21, The U.S. version is 4. .20. .


2008-11-24 SONY release 5. .00 system.


2008-11-26 Dark-Alex released 5. .00 M33. .


2008-11-30 5 .00 Dark-alex. publication M33-2.


2008-12-3 Dark-alex released 5. .00 M33-4. .


2008-12-27 Dark-Alex release 5. .00 M33-6.


Blank time. .


2008-2009-8 to 5.


Blank time. .


2000 may break the host's discontinuation and 3000 and non-cracked 2000V3, causing the guessed a blank area on the PSP.


At the same time, SONY also increase the encryption tools and techniques, the system to switch from the 5. .00 Soared 5. .50. .


However, the turn for the better soon appeared, not perfect.


Break new era. .


2009-04-20 SONY release 5. .50 official system.


2009-05-07 DAVEE Davee official release issued HEN for PSP3000 crackers. .


2009-05-08 official release Davee DAVEE release revisions for HEN and PSP2000 TA88V3 PSP3000.


2009-05-26 PSP2000 console crack all versions, and Becus25 Xenogears released CFW Enabler v1. .0 For ChickHEN, v3 host can run ISO. .


2009-06-06 5. .03 GEN-A (Full) published ISO 3K host can run.


2009-06-08 Xenogears released CFWEnable3. .01 3k run ISO. .


2009-06-11 SONY release 5. .51 official system.


2009-06-135. .50 GEN-A (Full) release supports multi-folder (only 1000 and 2000 non-v3). .


2009-06-18-5. .50U3R publication supports accelerated reading rods.


2009-07-025. .50 GEN-B (full) release (to ~ 5. .50 GEN-A system). .


2009-08-28 most famous PSP warez Dark-AleX closed (Administrator that is only because of Forum maintenance costs into account).


2009-09-065. .50 GEN-B2 (full) release (to ~ 5. .50 GEN-B system). .


2009-09-10 SONY releases official system 6. .00 (previous SONY has more game UMD added 5. .55 official system, and most of these games in ISO has homemade systems running).


2009-09-30 PSPGEN Forum Yoshihiro released a well-known developer GAME DECRYPTER, able to decrypt the required 5. .55 Or 6. .00 System of the game mirrors EBOOT. . BIN files, so most of the required 5. .55 System requirements of the game image to the 5. .50 GEN or lower versions of the self-system run. .


2009-10-01 GAME DECRYPTER v2 release, can decrypt more versions of the EBOOT. .BIN game.


2009-10-01 SONY release 6. .10 Official system. .


2009-10-01 PSP Go (N1000) officially on sale (gangban, us, Euro).


2009-10-08 GAME DECRYPTER v3 release version of the game to further reduce demand, so the game after the break were to run at 5. .03 MHU or 5. .03 GEN. .


2009-10-09 GAME DECRYPTER v4 publishing can decrypt .10 version 6. demand for the game.


2009-10-225. .50 GEN-D (only support non-v3-1K and 2K) release, can be run directly without break 5. .55-6. . Xx version of the requirements of the game (ISO / CSO and UMD). .


2009-10-22 5. .50GEN-D2 (5. .50GEN-D) release.


2009-11-01 PSPGo date version available. .


2009-11-02 5. .03GEN-B 3K V3 released, you can directly run is not decrypted .55-5.6. .XX versions of the game.


2009-11-19 SONY release 6. .20 Official system. .


2009-12-16 GEN team's latest homemade system 5. .50GEN-D3 (PSP1000/2000 non-v3 applicable)/5. .03GEN-C (PSP3000/2000v3) officially released.


2009-12-24 Home Systems: 5. .03 DT-A to read faster and more perfect compatibility. .


2009-12-25 Date the company launched the world's first to Sony official system of the program to run PSP Action Replay.


[Edit this paragraph]. .


Capability maturity model SW-CMM is currently the best software process, and CMM has become the de facto industry standard for software process. However, the CMM while providing a strong framework for software process improvement, but just tell us what "to do", but doesn't tell us "what should be done", did not provide information on the realization of the key process areas need specific knowledge and skills. In order to compensate for this lack, Humphrey and presided over the development of a personal software process (PSP, Personal Software Process).


PSP and specific technologies (programming languages, tools, or design) independent, its principles can be applied to almost any software engineering missions. PSP can:. .


(1) description of the principles of personal software process;.


(2) to help software engineers to make accurate plans;. .


(3) to determine the software engineers to improve the quality of products; the steps to take.


(4) measurement of individual software process improvement to establish benchmarks;. .


(5) determine the process of change on the ability of software engineers.


[Edit this paragraph]. .


References:.


PSP_ more. .


PSP peripheral products.


New PSP picture. .


PSP 3000 selection guide.


PSP 3000 Buying Guide. .


Extended reading:.


1. . PSP to Know http://hi. . Baidu. . Com /% CE% E4% CF% E7% BA% CC% B5% B6/blog/item/c452bbd51a6f62ce51da4bd7. . Html. .


2. go into PSP http://hi. .baidu. .com/% CE% CF% E4% BA% E7% B5% CC% B6/blog/item/6ea9ebfb2e0e156e024f56f1. .html.


3. . Classic PSP picture: http://aiyaqingqing721. . Blog. .31 Home. . Cn. .


4. what use .PSP: http://www. .66560. .com/shuma/2009/0721/1061. .html.


5. . PSP the first portal: http://psp. . Tgbus. . Com /. .


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mp3. .


Table of contents [Hide].


Overview. .


Mp3 history.


MP3 audio quality. .


Licensing and patent issues.


Purchase considerations. .


Mp3 player AC meeting.


MP3 principle. .


The pros and cons of MP3.


MP3 and ear from the chip on the match. .


Fortress: the advantages and disadvantages of MP3.


Overview. .


Mp3 history.


MP3 audio quality. .


Licensing and patent issues.


Purchase considerations. .


Mp3 player AC meeting.


MP3 principle. .


The pros and cons of MP3.


MP3 and ear from the chip on the match. .


Fortress: the advantages and disadvantages of MP3.


. .


[Edit this].


ISO standards MPEG1 and MPEG2 third layer (Layer 3), sampling rate 16-48kHz, code rate 8K-1. .5 Mbps. .


MP3 full dynamic imaging experts compression standard for audio level 3 (Moving Picture Experts Group Audio Layer III). In today's more popular a digital audio coding and lossy compression format, which is designed to significantly reduce the amount of audio data, but for most users, the sound quality and original uncompressed audio there is no apparent decrease in comparison. It was in 1991 in Erlangen by the research organization Fraunhofer-Gesellschaft for a group of engineers, invented and standardized. .


In a nutshell, MP3 is an audio compression technology, as the full name of the compression method is called MPEG Audio Layer3, so people use it as MP3. MP3 is the use of the MPEG Audio Layer 3 technologies, makes music with a 1: 1: 10 or even 12 compression, compressed into a smaller file, in other words, the sound quality loss is very small in the compresses files to a smaller extent. But also very good to keep the original sound quality. Because MP3 small size, high quality MP3 format features make almost synonymous with online music. Per minute of music is about the size of MP3 format is only 1MB, so the size of each song is only 3-4 megabytes. Using the MP3 player to the MP3 files in real time decompression (decoding), so that high-quality MP3 music to play out. .


MP3 is a compression format. It dropped off Pulse Code Modulation (PCM) audio data on human hearing is not important data (similar to JPEG is a lossy image compression), so as to achieve a smaller file size.


In the MP3 [1] Many techniques are used, including psychoacoustics in order to determine which part of the audio can be discarded. MP3 audio can be carried out in accordance with different bit rate compression, provides the data size and sound quality trade-off between a range. .


According to the MPEG standard, the MPEG-4 AAC (Advanced audio coding) is the MP3 format of the next generation, despite many creation and promotion of the importance of other formats. However, due to the unprecedented popularity of MP3, succeed in any other format in the meantime are not possible. MP3 is not only a wide range of client software support, hardware support, such as portable media players (MP3 players), DVD and CD player. MP3 playback is not the same as with DVD.


MP3 player, two by two or more circuit board component, circuit board and circuit board insert row between the multi-use piece to connect, after prolonged use, it will insert a row is like a poor contact may occur , and the resulting failure is as likely to be multiple, and serious when it could not boot. Of course, this problem is relatively simple and general maintenance, you can directly insert rows unplug, and then use the brush to clean stained with ethanol, washed several times after repeated contacts can be like a poor contact is removed, if still can not be used, can be sold to recycling electronics companies, allowed for environmental treatment. .


MP3 format features.


1. . MP3 is a data compression format. .


2. it dropped off Pulse Code Modulation (PCM) audio data on human hearing is not important data (similar to JPEG is a lossy image compression), so as to achieve a smaller file size.


3. . MP3 audio can be carried out in accordance with different bit rate compression, provides the data size and sound quality trade-off between a range. MP3 format uses a hybrid time domain signal conversion mechanism to convert the frequency domain signal. .


4. .32-band phase integral filter (PQF).


5. .36 Or 12 tap modified discrete cosine filter (MDCT); each sub-band size can be 0. .1 And 2. .31 Between the independent choice. .


6. not only extensive .MP3 client software support, hardware support, such as portable media players (MP3 players), DVD and CD player.


[Edit this paragraph]. .


MPEG-2 standard part of the official title of this standard was first published in 1995 by the ISO/IEC 13818-3.


Encoder bit rate compression efficiency is usually defined as the median compression rate depends on (: en: bit depth) and the input signal sampling rate. However, products often use the CD parameters (44. .1 KHz, 2 channels, 16 bits per channel or 2x16 bit referred to) as the reference compression ratio, using the reference compression ratio is usually higher, which also shows the compression ratio for lossy compression problems. .


Karlheinz Brandenburg used CD media Suzanne Vega's song Tom ' s Diner to evaluate the MP3 compression algorithm. Use this song because of the chosen, a simple melody makes it easier to hear the playback compressed format. Some people jokingly referred to as "Suzanne Vega will be MP3 's mother". Reference CD from the EBU V3/SQAM more some serious and critical audio excerpts (glockenspiel, triangle, accordion..) Is the professional audio engineer to evaluate the subjective feelings of MPEG audio format quality. .


MP3 to the public.


In order to produce bit compliant MPEG Audio files (Layer 1, Layer 2, Layer 3), ISO MPEG Audio committee members developed using C language called ISO 11172-5 reference simulation software. In some non-real-time operating systems that can demonstrate the first compressed audio DSP-based real-time hardware decoding. Some other real-time MPEG Audio developed for consumer receivers and set-top boxes for digital broadcasting (radio DAB and TV DVB). .


Subsequently, 7 July 1994 Fraunhofer-Gesellschaft has released the first known as the MP3 encoder l3enc.


Fraunhofer development team in the July 14, 1995 the selected extension. . Mp3 (before extension is.. Bit). Use the first real-time software MP3 player Winplay3 (1995 年 9 月 9 the launch of) many people can own a personal computer and playback MP3 encoded files. At that time, relatively small hard disk (such as 500MB), the technology for entertainment in the music stored on your computer is critical. .


MP2, MP3 and Internet.


October 1993, MP2 (MPEG-1 Audio Layer 2) files appeared on the Internet, they often use the Xing MPEG Audio Player play, and later appeared Tobias Bading developed for the Unix MAPlay. MAPlay in the 199 was first released on February 22, has now been ported to Microsoft Windows platform. .


Beginning only MP2 encoder product is Xing Encoder and CDDA2WAV, CDDA2WAV is a CD track is converted to WAV format with CD gripper.


Internet Underground Music Archive (IUMA) is generally considered the originator of online music revolution, IUMA the Internet's first high-fidelity music web site, in the popular MP3 and network before it a number of 1000 authorized MP2 recordings. .


Starting from the first half of 1995, until the late 1990s, MP3 on the Internet, began to flourish. MP3 popular mainly benefited as Nullsoft in 1997 with the release of Winamp and Napster in 1999 publication of the Napster case companies and software packages, and their mutual development. These programs make it easy for ordinary users to play, create, share, and the collection of MP3 files.


MP3 files on peer to peer file sharing technology debate spread rapidly in recent years - mainly because of compression makes file sharing possible, without the compressed file is too large difficult to share. Because a large number of MP3 files transmitted through the Internet some of the major record labels sue Napster by law to protect their copyright (see IP). .


If the iTunes Music Store such a commercial online music distribution service often choose to support other or proprietary digital rights management (DRM) music file formats to control and limit the use of digital music. Support DRM format used is to prevent copyrighted materials from being an infringement of copyright, but most of the protection mechanisms can be some method of cracking. These methods can be used to generate computer whiz could unlock a free copy of the file. A notable exception is Microsoft's Windows Media Audio 10 format, now it has not been cracked. If you want to get a compressed audio file, the recording of audio streams must be compressed and will bring lower quality. .


[Edit this].


LAME encoder. .


* LAME Mike Cheng in 1998 for the first time earlier in the development of LAME. Compared with the other, it is a fully LGPL MP3 encoder, it has good speed and quality, and even MP3 technology is the successor to version formed a challenge, is the standard of the encoder.


Many of the early encoder is no longer widely used:. .


* Fraunhofer Gesellschaft: some good, some coder has a defect.


* Xing. .


* BladeEnc。.


* ACM Producer Pro. .


A good coder to 128 to 160kbit/s down to acceptable quality, in 192kbit/s 160 to achieve near-transparent sound quality. It is not in a particular encoder or the best topic in encoder 128kbit/s or s by 192kbit/sound is misleading. A good encoder in 128kbit/s next generation MP3 may be better than a bad coder in 192kbit/s next generation MP3 sound quality better. In addition, even if the encoder is the same as the file size, a constant bit rate of MP3 than a variable bit rate of MP3 sound quality to be much worse. .


One important issue is the quality of the audio signal is a subjective judgement. Placebo effect is rampant，with many users claiming to require a certain quality level for transparency。 Many users in A/B test is passed, they cannot be lower-speed diff files. A specific bit rate for some, is not enough. Perception of each person's voice may be different, so one can meet all of the specific psycho-acoustic model is not evident. Listen only to change the environment, such as audio playback system or the environment will show lossy compression may be generated by reducing sound quality. Figures given above is most effective as a general reference, but the area of lossy compression in the compression process of a truly effective means is to listen the audio quality test results. .


If your goal is to achieve without quality loss of the audio file or in the Studio of an audio file, you should use a lossless compression algorithm that is capable of 16-bit PCM audio data compression to 38% and sound without any loss of such a Lossless Audio compression tools, Apple Lossless, LA TTA, FLAC, Windows Media Audio 9 Lossless (wma) and Monkey ' s Audio, etc. The need for editing, mixing processing to make use of lossless audio file format, or lossy compression of error may arise after treatment can not predict, many times the losses generated code will be mixed together in dealing with these losses will later be coded will become more apparent. Lossless compression rates reducing the cost of the next to achieve the best results. .


Some simple editing operations such as cut off part of the audio fragment, you can directly on MP3 data operation without reencoding. For these operations, as long as you use the appropriate software (mp3DirectCut and MP3Gain), the aforementioned concerns can do not need to worry about.


Bit rate. .


Bit rate for MP3 files, it is variable. The general principle is that the higher the bit rate is a sound file contains more information on the original sound, so that the playback sound quality. In the early MP3 encoding, the file uses a fixed bit rate.


MPEG-1 Layer 3 allows the use of the bit rate is 32,40,48,56,64,80,96,112,128,160,192,224,256 and 320 kbit / s, allowing the sampling frequency is 32,44 . .1 And 48kHz. 44. .1 KHz is the most frequently used speed (the same with the CD's sampling rate), 128kbit / s is in fact "good quality" standards, though 192kbit / s in the peer file sharing networks are gaining in popularity.MPEG-2 and [informal] MPEG-2. .5 other some bit rate: 6, 12, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160kbit/s..


Variable bit rate (VBR) is also possible. MP3 files of audio cut into their own frames of different bit rate, so that when the file encoding can dynamically change the bit rate. Although the initial implementation of this feature is not, VBR has now been widely used. The technology allows large changes in the voice of some of the bit rate using a larger change in the small part of the sound use of smaller bit rate possible. This method is similar to the voice-controlled tape recorder does not record the static part of the savings in tape consumption. Some encoder relies heavily on the technology. .


$ 640kbit/s of non-standard bit rate you can use the LAME encoder and free-form, but almost no MP3 player can play these files.


MP3's design limitations. .


MP3 format, some simply by using a better coder bypass inherent limitations. Some new compression format such as Vorbis and AAC no longer have these limitations.


In accordance with the technical terms, MP3 has the following limitations:. .


* The maximum bit rate is 320 kbit/s;.


* Time resolution relative to the rapidly changing signal is too low;. .


* For more than 15. .5/15. frequency of .8 kHz without scale factor band;.


* Joint stereo is done on the frame and the frame;. .


* No definition encoders/decoders of the overall delay, which means that the lack of a formal gapless playback;.


However, even with these limitations, provide a good MP3 encoder to adjust to a very competitive complete coding task. .


MP3 audio encoding.


MPEG-1 standard MP3 encoder is not a precise specification, but on the contrary, decoding algorithm and file format has been carefully defined. It is envisaged that the realization of the design code for removing their information in the original audio part of the algorithm (or is it in the frequency domain of the modified discrete cosine (MDCT) that). In the encoding process, 576 samples were converted into time domain frequency domain samples 576, if it is transient signal on the use of 192 instead of 576 sampling points, which is to limit the quantization noise as a brief with the proliferation of transient signals. .


This is Vorbis newer sound perception.


This will result is the emergence of many different MP3 encoders, each generation of sound quality varies. There are many more of their results, so a potential user can easily select the appropriate encoder. To remember is that the performance of high-speed encoding excellent encoder (such as LAME this widely used in high-speed encoder) may not be in the low-speed performance is also good. .


MP3 audio decoding.


On the other hand, decoding carried out in detail in standard definition. .


Most of the decoder is bitstream compliant, which means that the MP3 file is decoded from the non-compressed output signal will be the standard document mathematical definition of exactly the same output signal (the approximate error).


MP3 files have a standard format, this format is included 384,576, or 1152 samples (with the MPEG version and layer varies) frame, and all the frames have associated header information (32) and Supplementary information (9,17 or 32 bytes, with the MPEG version and stereo or single channel differ). Header and side information help the decoder to correctly decode the associated Huffman encoded data.Therefore, the majority of codecs comparisons are almost entirely based on their efficiency calculation (for example, in the decoding process memory or CPU time).


ID3 and other tags. .


The "label" is the MP3 (or other format) saved contains such as title, artist, album, track number, or other information about the MP3 files are added to the file's data. The most popular standard label formats is currently the ID3v1 and ID3v2 tag ID3, most recently in APEv2 tags.


APEv2 originally developed for the MPC file format (see APEv2 specification). APEv2 ID3 tags can coexist in the same file, but it can also be used alone. .


Volume normalization (normalization).


As the CD and other various sources are recorded under a different volume, save the file in the volume label information will be useful, so playback can dynamically adjust the volume. .


People have made a number of MP3 files encoded with gain. Idea is the volume of the audio file (not the "peak" volume), thus ensuring continuous tracks the volume does not change.


The preservation of the most popular playback gain most common solution is to simply be called "Replay Gain" approach. Track the volume of the existence of mean and pruning information metadata tags. .


Optional technology.


Many other lossy audio codecs exist, including:. .


* MPEG-1/2 Audio Layer 2 (MP2), MP3 predecessors;.


* MPEG-4 AAC, MP3's successor, Apple's iTunes Music Store and iPod use;. .


* Xiph .org Foundation of Ogg-Vorbis, free software and there is no codec of the patent;.


* MPC, also known as Musepack (formerly MP +), derived from the MP2;. .


* Thomson Multimedia's combination of MP3 and mp3PRO; SBR.


* AC-3, Dolby Digital and DVD use;. .


* Minidisc Sony's ATRAC,;.


* Windows Media Audio (WMA) from Microsoft;. .


* QuickTime QDesign, for low-speed;.


* AMR-WB + for cellular phones and other limited bandwidth use is optimized to enhance the adaptive multi-speed broadband codec; (Enhanced Adaptive Multi Rate WideBand codec);. .


* RealNetworks RealAudio of, often used in streaming media; Web site.


* Speex, CELP-based voice and VoIP expertise to the design of free software and non-proprietary codecs. .


Mp3PRO, MP3, AAC, and MP2 is the same technology family members, and are based on broadly similar heart acoustic model. Fraunhofer Gesellschaft has many covers these codec technology used by the basic patent, the Dolby Labs, Sony Corporation, Thomson Consumer Electronics and other AT&T owns a number of key patents.


In the Internet there are some other lossless audio compression method. Although they are different with MP3, they are excellent examples of other compression system, they include:. .


* FLAC lossless audio that ' free codec (Free Lossless Audio Codec) '.


* Monkey's Audio. .


* SHN, also known as Shorten.


* TTA. .


* Wavpack。.


* Apple Lossless. .


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Various colors of MP3.


Maung extract "accuracy is pretty close..


Shapes must be original, not the full street can be seen in public since the development of mold design, mold and MP3 is not easy, but there is a certain amount of appearance design patent, manufacturers must put this product is positioned as a high-end models, more effort is needed. Color matching is very important and often advanced designers will pay great attention to this aspect, not necessarily to colorful, but it is certainly reasonable to mix, make MP3 looks more elegant and more. The consumer has formed a strong visual impact, particularly those directed at fashion beauty MM tailored product, color than any feature more attractive. In addition, advanced paint processing, the shell will be easy to lose color, which can be reflective color from the shell of the degree seen. .


Material selection, metal, rubber, engineering plastics, and worst, of course, this is not to say that metal sculptures of MP3 is not good, but the metal will fight the relatively strong, but it looks more beautiful, more quality and grade. The so-called "away knows," touch MP3 Shell to see whether it is convenient, you can generally determine the material quality MP3. Work is the product of subtlety and the connection between the parts, if the emergency spliced shell (especially the battery cover), press the soft and comfortable, no burrs and body unevenness basically worked through. .


Light weight, the point can not be ignored, MP3 is the Walkman device, even design them even more prominent, and not easy to carry or volume is too large, the same loss of "carry" the essence. Mirror design is very popular recently, but the real nano-mirror can be clearly reflecting light as a mirror to use. Mirror's biggest flaw is that once the scratch, the wound will become very apparent, as hostilities break out of the beauty.Danding DX-8 fuselage of the shape of a streamlined ellipsoid and upper and lower ends of the curve in radians, looks and eggs of the floor plan is indeed very similar, so it is named "Easter egg".


Second, the display. .


Scientific progress in the development, fashion is also in development and progress, we use the phone has moved from being a simple monochrome screen enter a color screen, again, the typical consumer digital products on behalf of the MP3 player also has begun taking steps into the pace of the downturn, but also believe this will become the mainstream of development.


With color effects to points, of course the higher the number the better the color, the screen material is LTPS (Low Temperature Polysilicon, low temperature poly silicon display) is better than TFT, TFT (thin film transistor, thin film transistor) than the STN (Super Twisted Nematic , super twisted nematic), as OLED (Organic light-emitting diode, light-emitting display) color screen, it is more dominant in the dark, but not such as TFT and STN display complex images as。.


As the MP3 volume is small, the screen size will be greatly restricted, and the screen is not always better, but how much depends on show content, the same size, the display screen, the more that the higher the resolution, see the more pictures will be fine, also help by adding personalized graphics menu, so that mode of operation close to the daily habit of Windows window. .


Third, the chip.


The main chip is the storage and decoding chip, memory chip manufacturers do not usually disclose the information, of course, Samsung, Intel, Toshiba and other chip makers better quality, but regrettably only disassemble can be seen, not worth mentioning. .


As for the decoding chip, in many MP3 testing has mentioned that it not only determines the speed of the audio processing, and also determine the MP3 audio of the special features, including multiple EQ, 3D sound. Of course, decoding chip is also affecting the quality of one of the most important part of the APU (Audio Processing Unit, audio processing unit) algorithm will restore the waveform plays a decisive role. Although the MP3 format is a lossy compression, but with a high sampling rate, the MP3 will substantially improve the audio quality. However, the high sampling rate of MP3 audio files need to support high data stream decoder chip, at a time when low-cost decoder chip used in products apparently powerless. .


4. headset.


Headset consists of two parts, one is MP3's own output power, output power (20mW add up to more than two headphone) can promote a higher number of high impedance headphones, so sound quality on the performance of a more perfect; Second, the quality headset itself, appearance is necessary to take the road machine, certainly not good headphones look bad to go there. The most important thing is that headset manufacturers claiming to be a well-known leather headset OEM, to make publicity. In fact, most of the headphones are not really OEM products, only have the appearance of a shape, and there is simply not true.Man shoots, once a headphone model to establish a brand-name manufacturers, many headphones with wind production takes the form of a product, manufacturers are MP3 in a foot. Therefore, we must not blind obedience to the merchants or some press release article describes the best methods is still listening to yourself. To be honest, most of the MP3 headphones are not incidental, even senior product, still makes us feel disappointed that only those truly high-end products, will there be more acceptable for headphones. If you are really paying attention to the quality of the supplied headphones, MP3, only from each brand and top-end select few models only . .


Incidentally, even if it is really OEM earphone, its product performance, quality is certainly less than the retail version of the headset. Retail products and taking into account the brand image and profitability, product requirements, relatively speaking, OEM just screw, part of the standard does not meet the requirements of the retail version, and without too much attention to. All in all, we should not be too superstitious MP3 attached OEM earphone, than other stock top brand Earphone for good, the price of about $ 50-150 third party headphones, the effect is absolutely better than the so-called OEM products.


5, battery. .


MP3 battery General is a collection of lithium-ion battery the battery has a capacity of small volume... light weight, etc..


When buying or key consideration should be noted that the capacity of the battery, of course, the higher capacity the better. .


Most of the MP3 with 5 numbers (AA) or no. 7 (AAA) batteries, they are free to buy, the price is cheaper (0.5-5). If it is a rechargeable lithium-($ 10-15), use the time quite long, playing time is up to 10 hours, and then bring one more batteries to meet the 2-3 days, you might have used the headset plug with ears!.


Important to talk about here is that lithium is divided into two kinds of removable and non-removable, removable lithium is very easy to use, can be replaced at any time, in addition to using the USB cable to connect computer and charging, you can also use the included power adapter to charge . Its large discharge capacity and a special way, you can guarantee 30 hours of playback time, enough to get on top of three AA batteries. However, the use of the MP3 removable lithium few, the market will not exceed 10.Battery on the nameplate will indicate the battery voltage, security matters, warranty information, as well as the maximum output current and charging time, purchased separately, but the purchase of a removable battery prices are fairly expensive (around $ 150-200), because of its size is too small, you accidentally lost cause great pain.


In contrast, non-removable lithium no loss problem, the use of such batteries MP3 is usually very small size, big power and even the LCD screen is also lacking, but still maintain the 6-8 hours of play time. Its biggest problem is often charge a long time used, must carry the charger is really very troublesome. If you have a variety of digital products, then the weight of the charger alone is enough of a subject you.In addition, we must pay attention to it's life, many people use a lithium battery is not attached to the battery charging is not used, or a day filled with many times over and over again, this will seriously affect the normal life of the lithium. Aura is to use the time shorter and shorter until finally not charging. Unremovable lithium once damaged, you can only get the vendor maintenance battery only manufacturers are uniquely dedicated battery replacement price of about 100 Yuan/piece. After the warranty period the product, but also to pay maintenance fees, long term investment will be doubled.


6, function. .


Apple MP3.


MP3 function more and more with PDA, cell phones, have to develop multi-functional, as far as possible absorption features of other products in order to increase the product selling point. Start to demand the time of purchase, do not blind pursuit of multi-function, feature the more expensive the more the price, and bought, you will find many are simply unobtainable. .


? Removable hard disk: PC direct to MP3 is recognized as a mobile storage, for easily accessible storage of music, the various files.


● Firmware upgrade: to solve the known post-release software products, hardware failure, adding new features. .


● Folder browsing: press folders store different songs, and as a unit, without all the MP3 playback is placed in the same directory, improve management and ease of use.


● Multi-language: The main support for Chinese Simplified, Chinese Traditional, Korean, Japanese, English, some models even have 26 languages. .


● A-B repetition: repeated reading a section of content, ease of learning a foreign language.


● text to read: big-screen MP3 usually only have this feature, you can see when the e-books, some products also support PDA's text format. If the firmware is sufficient capacity, you can download a variety of Chinese and foreign language fonts. Auto-scroll feature is also useful to automatically flip up or down when the long bright background light, while eliminating the need for their trouble turning the pages, but also fully compensate for the shortcomings of the small screen. Edge even read while listening to MP3, as the function of a simplified PDA. .


● TTS (text-to-speech, speech text), text directly with MP3 sound is converted to text, sound and no tone and machine rhythm transform sounds very strange, very suitable for does not want to read books for lazy people.


● dictionary: English-Chinese dictionary for translation purposes, attention, MP3 controls are limited, import English words is not easy. .


● Automatic recording function: adoption of the SAD (voice Activity Detector, Sound activated detectors), the duration can be set to silent, only when a voice recording will be saved in the memory space, more time-saving during playback.


● Remote Recording: Using AGC (Auto Gain Control, Automatic Gain Control), adjustable sensitivity and recording quality (low, heavy, high), for long-distance external recording, such as: meeting. .


? FM: radio, many products have a preset number of channels, there is no need to adjust each time.


● FM recording: radio content to conversion to MP3, some products have FM recording! Can enter the day of the week, when the number of cycles per second a few minutes to begin recording the channel, which broadcasts for the favorite or foreign language learning programs will not be busy and miss, can listen to recorded slowly. .


? EQ settings: settings for sound effects. Almost every product will have several already preset EQ settings, such as normal, rock, jazz, pop, classical. Some MP3 also supports custom audio settings, the user can according to their own preferences to customize. But no LCD display products, these set EQ almost does not exist, there is only one of its curing audio mode. In this way for some special effect zhongai personality music friends seem a bit cruel.


● record straight: the external audio source (CD / MD players, home audio, computer) code compression for music files, MP3, on a direct presence. As the machines built-in MP3 encoder chip performance poor sound quality as computers compressed music files. .


● Clock: time settings you can enter the month day, hour, and can be used as a watch.


● Alarm clock: can set the time clock, not only out of beeps in the ear, comes with speakers, will also Didi, without earplugs will take effect when the alarm clock. .


● Regular shutdown: settable time between 0 ~ 180 regular shutdown and, of course, can also be set from 0 to 60 minutes of no operation automatically shut down, the most convenient to listen to songs before going to bed at night.


● Image viewer: not only can browse the photos taken, but also enjoy the computer to download the pictures. MP3 of the screen as a small, relatively high-resolution pictures to see that its duties will be fine, but most have a limit on the screen, the ratio does not will not be displayed correctly the deformation phenomenon. .


● Digital camera: camera mobile early, with 10-megapixel 1/5. .5 "CMOS camera, CMOS main drawback is that the brightness sensor slow lighting environment camera effect is better. The biggest advantage of CMOS is small in size, the most suitable in MP3 Walkman. The camera itself also has many features that can be digital zoom, multiple effects shots, etc..


7, capacity. .


Capacity, of course, is better, 10-40GB capacity to store songs and 256MB-1GB borrows the storage volume. However, the capacity is related to many questions. Referring to the large-capacity MP3 player, a lot of readers who are familiar with this market will be thought of as a JUKEBOX, innovation, create a high-capacity MP3 player market product, the product became a synonym for high-capacity MP3. And the first generation of JUKEBOX, although the latest product volume is slightly smaller, but still belong to the "Monster" level. As the volume is too large, this product has also been criticized by many consumers, but also directly led to the launch of its Apple iPod loggerheads in failure. iPod's success, also with a beautiful appearance, small size and large capacity. At this point, we understand that, in the pursuit of capacity, but also can not ignore the size and cost too much, only in good balance among the three, in order to maintain the value of the product life. .


It is worth noting that at present most of the MP3 Flash chip is used as storage media, and Flash chip high price has become a mass popularity of one of the biggest obstacles. Therefore, technical breakthroughs will be bulk-player development direction, if you really need to pursue a high capacity, had to abandon Flash chip, select MP3 hard disk. Watch those 512MB-1GB products developed enough to buy into the capacity of the hard drive MP3 dozens of times, is it necessary to make such a large volume of sacrifice, is to think clearly. Unless you never get those backpacks, belt bags, Guabao, even wallets, cell phones do not want to carry around, I hope, "Inorganic whole body light" person, or is more than silver was used up, how to spend money is a headache friends, otherwise, hard drive-based MP3 is still the best performance / price ratio. .


Special mention DMC Xclef 500 production, it is so far the largest capacity MP3, storage capacity, use the USB 2 137GB. .0 interface, use the line input or optical input can achieve up to the quality of the recording 320Kbps. Support MP3 VBR compression rates. Built-in 2. 5-inch hard drive, with FM radio, FM recording, language recordings, seven large-screen display, support ID3, there is support for multiple languages, use the built-in lithium battery, a capacity of 2000 mA, the body has a 12MB cache, Letter to noise ratio greater than 90dB, distortion rate was 0. .01% For the dual headphone output power of 10 mW, which weighs 255 grams. Price of 450 dollars, Oh, its price high enough to buy a PDA. .


8. transfer speed.


Now MP3, most with flash drive features, whether in the time to transfer files or music, speed is very important. USB 2. .0, Also known as Hi-Speed USB, its transmission speed of 480Mbps = 60MB / s, in other words, in theory, one second to transmit 12 5MB size of MP3. The IEEE 1394 (FireWire), speed is 400M bps = 50MB / s, one second can be transmitted 10 5MB size of MP3.For 256, 512 MB of products for the copying songs just a minute, even gigabytes hard drive MP3, nor will it be too slow. However, using a USB 1. .0, its speed is only 12M bps = 1. .5MB/sec and a copy of the first songs to 5 MB of 3. .5 seconds, lyrics, especially in hard-drive MP3, not many people have such a good patience.


Before buying, be sure to look at whether to support MP3 USB 2. .0, About 30-40 products in the market now support USB 2. .0, Generally the newer models. However, the number of products will not feature clearly marked in this case, we can only to find the manuals or box, or directly ask dealers, really can not be determined, then the best way is to plug in the computer test test, as most motherboards have been included USB 2. .0 Interface, Win XP will be prompted to find the related equipment. .


9. Annex.


Annex quality is to see whether companies are willing to bother most direct way, usually MP3 has product manuals, ear plugs, USB cable line, warranty card, driver CD, the higher end products will be accompanied by the arm button on the body belt, bag, leather bags, wire transfer audio, music, recorded straight line, hanging in the neck strap, ear protection film, battery, charger and so on. In short, the more the number of attachments, making ultra-fine work, that the quality of player itself will not be bad to go there, Chun has not heard of "prominent men are no weak soldiers," the words of it? . .


10. supported formats.


MP3 format is the most commonly used, it supports the sampling rate of 44. .1 KHz, you can use the bit rate is generally 8-256Kbps. MP3 products of different sampling rates and bit rates supported range varies, of course, the better the wider the support for the sampling rate, better products that can support to 48KHz. For dynamic code VBR, you can make the file under the same sound quality are smaller, some machines can not support. WMA is Microsoft's extension of a format, compression rate is generally 5-192Kbps.In the same tone quality, WMA to MP3 format file is smaller, so has this feature of MP3 players in disguise to increase its memory capacity. Also remind friends that use Windows with WMP compressed files, you need to remove the copyright protection options, from WMA files cannot be played on the MP3; WMA from downloaded files are encrypted, with support for WMA player may also appear not to be able to play. For other formats, such as ASF, WAV, etc., are not easy to use MP3 and WMA formats, from a practical point of view, is indispensable. .


11. the frequency response of coverage.


Human ear can hear the sound frequency range is 20-20000Hz, below 20Hz and above 20KHz voices are all human ear can not be seen. However, the range of 50Hz to 18KHz frequency response between, should already be a current MP3 should be able to reach this range of frequency response. However, frequency response range and sampling rate is different, we should not confuse. .


12, Snr.


Signal to noise ratio that is not distorted sound source to produce the greatest signal strength and noise intensity at the same time the ratio between, usually "SNR" or "S / N" that is a measure of speakers, headphones and other sound equipment, an important parameter. The MP3 is also a critical parameter. "SNR" general in decibels (dB) as a unit, said audio signal to noise ratio the higher the better equipment. Generally speaking, at least to choose more than 60dB signal to noise ratio in the product.But there is not a formal inspection agencies to evaluate the product-to-noise ratio, so some poor MP3 product descriptions are also marked with high signal-to-noise ratio, this can only rely on your own ears. Play MP3 in the absence of any audio source signals, if you can hear the more obvious the "buzz" or "hissing" sound similar to the current, the machine-to-noise ratio is too low, not suitable for purchase.


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Pop music or bass colleagues, using MX500 will let you have more surprises, of course, if you like human voices, treble, you can tend to choose Sony E888. .


2. using the Sigmatel for STMP3410/1342 MP3 mix of programmes.


The STMP3410/1342 Sigmatel decoding chip shown is: a sense of lack of low volume, no effort, while the performance of the general tenor, treble is more blunt, in general, is more beautiful sound. .


At present the market with this chip MP3 takes up half of the country, and from which, high-end Samsung, Hyundai, DEC, MSC-to-end brand manufacturers have adopted the most fundamental reason is that it is a single-chip, high integration, features relative good, but not like described above Philips decoding chip to control chip, just add a flash chip is OK, because the cost is low.


MP3 using this chip have Yepp 55 series, MSC h128, DEC M220R so, the market-name of the MP3 can not say here. .


For this type of MP3, businesses are generally adopted by the promotion tools is not a price reduction, but rather send earplugs, last year, sent the Sennheiser MX300 of, that is because they sound relatively common, especially in the low-end of the MP3.


Therefore, we have their ear on the line with the principle of good enough: Sennheiser MX300 and Sony E808. Both earplugs can make your MP3 youthful, and will not suffer can not bear to "listen", are also considered to take the shot it! Of course, or you can consider selecting Aihua the V161, the current price is around 80-100 dollars, prominent low-frequency, listening to pop music is no problem at all. .


This grade is not recommended to use more expensive earplugs (headphones), because according to the phrase, the sound quality is determined by the MP3 itself, earplugs (headphone) merely as a supplementary improve, but if the MP3 sound quality is not good, in and of itself a good earplugs (headphone) is a waste.


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Third, the Korean telechip TCC730/TCC731 MP3 mix of programmes.


It should be said, from Korea telechip of TCC730/TCC731 momentum should not be underestimated, although only in the second half of the market last year, but due to the support of South Korean public companies with continuous improvement of its development as Sigmatel's STMP3410 / 1342, as has a momentum of sound development - that is constantly improving, constantly improved. .


Of course, because we found that, from a functional, performance, quality, TCC730/731 are better than the SIGMATEL chip — of course, there is currently no reach SAA7750/SAA7751 level.


The South Korean TCC730/731 the decoder chip is shown: the amount being sufficient bass, the band balanced, broad sound field, if coupled with sound, common ear also has a good performance. .


Currently this chip MP3 mainly DEC street dance series and recently the flourishing danding MH356 — we have also evaluated shortly before the camera that it impresses.


As a result of this chip MP3 sound quality is better in itself, but also higher prices, it is not with a good ear (ear) is a waste. Similarly, and with a SAA7750/SAA7751 the MP3 program, we recommend you first select the Sennheiser MX500 and the Sony E888, on their performance both on the Internet, there are many, we do not spend more words here to describe. .


Of course, is equipped with better grades of ear (earphone) to help you get better sound quality — the key to see whether you are willing to invest in this regard. Better choices from the United States KOSS SP/KOSS PP, Germany, Sennheiser PX100/ATH-EM7 PX200, iron triangle, etc. NnP51 headphones-professional Headset Headphone Earphone News Forum mp3 Earphone Headphone product evaluation assessment.


The last mentioned and the moment of force Sunplus decoder chip, the current number of manufacturers have begun to use domestic, because they both lower cost, lower cost, with the functions of MP3 players, flash disk function, DVR format support, AB repeat, LCD display.They cannot, of course, the tone and Philips SAA7750/SAA7751 and telechip TCC730/TCC731 compared to that, but they do have surpassed the Sigmatel STMP3410/1342 of momentum in sound performance and Sigmatel for STMP3410/1342 counterparts, but also because of the emerging soon, so here it does not say.


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For now, the MP3 market, nothing more than the above-mentioned several types, with MP3 encoding functions must be high-end machine, there is no built-in FM radio and MP3 encoding functions can be classified into the low-end machine, with Built-in FM function without MP3 encoding functions can be classified into the side machine (of course, more and more low-end machine has this feature). .


Waterproof MP3.


First, what is waterproof mp3. .


Waterproof MP3 is for the exclusive use of the swimming, diving, surfing, canoeing and other water sports are using waterproof MP3 MP3. can let you in boring outdoor sports, entertainment, improve your endurance and efficiency, make dull sport fun.


Second, the type of waterproof mp3. .


Waterproof MP3 into neck hanging (necklace), arm-and head up trailer 3, representing the model respectively LFA-299 music tube series (arm up), the water sprite LFA-295w-music series (neck hanging), LFA-296 (head hanging), etc..


3, Waterproof MP3 waterproof level. .


Waterproof MP3 using the international standard industrial classification, waterproofing divided into IPX 0-8-9, 0 is the lowest-level, 8 is the most advanced.


0 No protection. .


Level 1 can eliminate dripping drops of harmful effects.


Two pairs of 15 degrees with the vertical direction within the protective effect of falling water droplets are. .


3-level can be eliminated and the vertical direction in 60 degree water droplets spray of harmful effects.


Four different directions can be eliminated from the harmful effects of splashing water droplets. .


5 can be eliminated on the nozzle flow of harmful effects.


6 can eliminate the strength of each direction of the nozzle jet flow harmful effects. .


Distance from the surface of the top 7.0-1 m, .15 30 consecutive minutes, the performance is not affected, not leaking.


8 at the top of the water a distance. .5-30 Meters, for 30 minutes, the performance is not affected, watertight. .


Species in mentioned LFA-299 series, LFA-295 series, LFA-296 series are waterproof IPX8 level, both the most high-grade waterproofing.


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Cottage MP3 advantages:.


First, full-featured simulation cottage high in the already well-known brand products are based on imitation and innovation, is the mainstream brand products derived, in addition to work in appearance but has some rough things more highly personalized innovative design, is called the Yangtze River superseding the old, in function of time into the cottage with greater use of the function. .


Second, low-cost products due to escape Government mountain village, and they do not pay VAT, sales tax, at the same time do not have to spend money on research and development of products, without any advertising, promotion and other costs, coupled with the successful cost control and distribution means flexible, resulting in its terminal retail prices often just brand MP3 1/2 to 1/3, or even lower. Cheap, cheap, too cheap for the vast majority of ordinary consumers have great destruction.


Cottage MP3's Disadvantages:. .


I. quality no protection for small and medium size manufacturers produced fortress, in the absence of formal product quality inspection specifications in the production process on a rough, resulting in a product quality the instability. Although ever spend money, but spend a period of time is broken, or a frustrating.


Second, no after-sale protection is different from the authentic cottage MP3 MP3, its lack of independent service point, in the event of quality problems, can not be effectively maintained. However, low cost, cottage manufacturers generally use the year of replacement strategies, effective solution to the cottage after-sales product questions. .


3. after the firmware upgrade cottage MP3 manufacturers, after all, do not have their own research and development capabilities in hardware core chip consists of parts manufacturers, which makes finding your own brand products in the products of certain deficiencies through a firmware upgrade to resolve, the cottage is a bit of MP3 a dull.


Fourth, because of the cottage MP3 too cheap to buy generally will be scoffed brand MP3 user. So buy a cottage MP3 users are usually reluctant to show themselves in front of the MP3. .


IT Digital in this performance continues to increase, new products constantly, products very quickly, then choose one of their favorite MP3 products show fortress was wise not now have a better life, in a future product replacement will not need to spend too much money, why?.


Reference:. .


MP3 and MP4 for comparison.


Extended reading:. .


1. recommended several highly similar cottage MP3: http://www. .66560. .com/shuma/2009/0627/881. .html.


2. . Recommend a collection of electronic sites: http://szlqf2006. . Oldcp. . Com /. .


3. .LAME encoder (English): .sourceforge .net http://lame../..


Open Category:. .


Multimedia, music, fashion, fashion, and music formats.