Gourt > Computers > Multimedia > Music and Audio > Audio Formats > MP3 (16)
MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding and lossy compression format, designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduction of the original uncompressed audio to most listeners. It was invented by a team of European engineers who worked in the framework of the EUREKA 147 DAB digital radio research program, and it became an ISO/IEC standard in 1991.
Overview
MP3 is an audio-specific compression format. It provides a representation of pulse-code modulation-encoded audio in much less space than straightforward methods, by using psychoacoustic models to discard components less audible to human hearing, and recoding the remaining information in an efficient manner. Similar principles are used by JPEG, a lossy image compression format.
The MP3 format uses a hybrid transformation to transform a time domain signal into a frequency domain signal:
- 32-band polyphase quadrature filter
- 36 or 12 tap MDCT; size can be selected independent for sub-band 0...1 and 2...31
- Aliasing reduction postprocessing
MPEG 4 :: Audio Formats
Digital Millennium Copyright Act :: Copyrights
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smartreview (smartreviews) Fri, 25 Dec 2009 04:04:37 -0000
Mach Speed Trio 4GB MP3 and MP4 Video Player (Black) (Electronics) newly tagged "mp3": Mach Speed Trio 4GB MP3 .. http://bit.ly/7EODTd
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Fraunhofer IIS: MP3 - Features history and technical information about the MP3 format.
Meta Description: [ This page offers information about development, quality and technology of the most popular audio coding standard for digital music: MPEG Layer-3 (MP3) ]
ID3v2 - Description of ID3 tagging standard (version 2) for MP3 files. Includes specifications, implementations and a mailing list.
Meta Description: [ Information about audio tagging such as ID3 and ID3v2. ]
MP3 Tech - Source of detailed technical information about audio encoding with MP3 and similar formats. Features documentation, articles, source code and a message board for programmers.
MP3-O-Phono - A custom made MP3-player device. Site contains many implementation details as well as photos.
MP3licensing.com - Details of the MP3 licensing programs for Thomson Multimedia and Fraunhofer IIS-A.
mp3PRO - Alternate audio compression format that is both backwards and forwards compatible with MP3 yet with significantly smaller file sizes. Site features articles, downloads and a forum.
Meta Description: [ mp3PRO.WS, mp3 PRO news and updates, free software downloads of the world's most popular audio compression format: information and free music. Also MP3 players! ]
MP3Pro Soft - Features software and information about mp3PRO and other similar audio formats.
Meta Description: [ MP3Pro Soft ]
MPEG Audio Frame Header - Technical explanation of how MPEG audio files and their headers are constructed.
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