Music devices are called MP3 players.
MP3 is the most popular music format on the Internet, which originated from the digital transmission scheme of147 of a German company in 1987. It adopts the technology of MPEGAODIOLayer 3, and compresses the sound file into a music file with a compression ratio of about 1∶ 12, which makes the transmission and storage more convenient and more conducive to online listening or downloading by netizens.
At the same time, the popularity of MP3 format music has also led to the emergence of MP3 dedicated playback equipment, which has developed rapidly in recent years. At present, the popular MP3 devices in the market have gone far beyond the original "player" category in terms of functions and performance, and gradually developed into multimedia handheld devices integrating audio playback (including music formats other than MP3), recording and rereading, text reading, mobile storage, FM radio and other functions. Some high-end MP3 devices even integrate audio editing, movie playing and other functions.
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The Origin and Technology of MP4
New technologies are always developing. A few years ago, MP3 Walkman quickly occupied the market of portable music players because of its small size and convenient use. And this trend of upgrading is constantly emerging in the digital market. The early MP3 Walkman replaced tapes, CDs and other products, and this machine that can only listen but not watch will eventually be replaced by a new generation of portable products. Of course, this can't be called a walkman. Combined with video playback, the new generation product can be called personal digital entertainment terminal. The representative of this kind of products is the MP4 player which is developing continuously at present. What are the advantages and disadvantages of MP4? Where will the future of MP4 products go? And read this article to explain it to you one by one.
What is MP4?
The first thing to understand is, what is MP4? MP4 is the abbreviation of MPEG-4 compression format. MPEG-4 is a video format, which can provide different resolutions from 320×240 to 1280× 1024. Portable media player is named MP4 player because it can support the playback of MPEG-4 files.
The World's First MP4 French Vision JukeboxMultimedi
What is PMC?
At present, MP4 products on the market are mostly named after PMP and PMC. What happened? PMC is the abbreviation of English "PortableMediaCenter", namely "Portable Media Center". Microsoft has unified the hardware specifications of PMC, the CPU adopts XScale provided by Intel, and the overall software framework is Microsoft's "WindowsPortableMediaCenter" operating system. It seems that the WIN-TEL camp will once again enter the portable media market and create a standard for portable media players. The overall architecture of PMC is open, and the application software can be extended on the basis of the operating system.
Samsung's first PMCYH-999
What is PMP?
Like PMC, PMP is the abbreviation of English, and the English name is "PortableMediaPlayer", that is, "portable media player". Unlike PMC, PMP has no uniform standard, and manufacturers can choose application software and configuration according to their own needs. In this way, PMP is more flexible, easy to extend software and so on.
iriverPMP- 120
What's the difference between MP4 and MP3?
All media players. What's the difference between MP4 and MP3? In fact, they are the products of different times. MP3 appeared for the needs of portability and sound playback. Most MP3 players, especially early products, only have a small screen. In the later stage, some MP3 Walkmans use large color screens, such as organic light-emitting diodes and TFT. , but mainly for playing music, and the screen only provides better display effect and expands some simple functions, such as e-books, browsing pictures and so on.
But MP4 players are different. It changed the relative weakness of MP3. In the measurement conditions of MP4 player, video playback accounts for a considerable part. The emergence of terminal operator P4 is to meet the demand of video playback.
However, thanks to the powerful CPU, operating system and relatively large screen, MP4 is much more powerful than MP3 in configuration. Therefore, MP4 products can achieve many functions that MP3 walkman does not have, such as video playback, peripheral expansion and so on. Even some MP3 players can support JPG image browsing, and the effect cannot be compared with MP4 players. Most MP4 players can not only play video, but also play audio of MP3 files. Therefore, MP4 player can be regarded as the replacement product of MP3 Walkman.