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The Moving Picture Experts Group (MPEG) designed MP3 as part of its MPEG-1, and later MPEG-2, standards.MPEG-1 Audio (MPEG-1 Part 3), which included MPEG-1 Audio Layer I, II, and III, was approved as a committee draft for an ISO/IEC standard in 1991, [14] [15] finalized in 1992, [16] and published in 1993 as ISO/IEC 11172-3:1993. [7]
The reference implementation is released under the LGPL 2.1 and currently available in version 2.0 (as of 12/2020) [8] FFmpeg codecs – Codecs in the libavcodec library from the FFmpeg project (FFV1, Snow, MPEG-1, MPEG-2, MPEG-4 part 2, MSMPEG-4, WMV2, SVQ1, MJPEG, HuffYUV and others). Decoders in the libavcodec (H.264, SVQ3, WMV3, VP3, Theora ...
Audio file icons of various formats. An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data (excluding metadata) is called the audio coding format and can be uncompressed, or compressed to reduce the file size, often using lossy compression.
MPEG-1 Audio Layer II is the standard audio format used in the Video CD and Super Video CD formats (VCD and SVCD also support variable bit rate and MPEG Multichannel as added by MPEG-2). MPEG-1 Audio Layer II is the standard audio format used in the MHP standard for set-top boxes. MPEG-1 Audio Layer II is the audio format used in HDV camcorders.
G.723 ADPCM audio (not the G.723.1 speech codec) Made for VivoActive Player: Advanced Systems Format (ASF) .asf ASF: any any AMV video format.amv Modified version of AVI [4] Variant of Motion JPEG: Variant of IMA, ADPCM Proprietary video file format produced for MP4 players and S1 MP3 players with video playback MPEG-4 Part 14 (MP4)
MPEG-1 is a standard for lossy compression of video and audio.It is designed to compress VHS-quality raw digital video and CD audio down to about 1.5 Mbit/s (26:1 and 6:1 compression ratios respectively) [2] without excessive quality loss, making video CDs, digital cable/satellite TV and digital audio broadcasting (DAB) practical.
The first WMA codec was based on earlier work by Henrique Malvar and his team which was transferred to the Windows Media team at Microsoft. [5] Malvar was a senior researcher and manager of the Signal Processing Group at Microsoft Research, [6] whose team worked on the MSAudio project. [7] The first finalized codec was initially referred to as ...
Linear pulse-code modulation (LPCM, generally only described as PCM) is the format for uncompressed audio in media files and it is also the standard for CD-DA; note that in computers, LPCM is usually stored in container formats such as WAV, AIFF, or AU, or as raw audio format, although not technically necessary.