| Mpeg-1 |
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MPEG-1 audio layer 3 is the full name for the popular audio format MP3 . The MPEG-1 AV format was later extended into the MPEG-2 and MPEG-4 formats. These extensions allow for greater compression for the same size of data. MPEG-1 consists of several "parts", as follows: #Synchronization and multiplexing of video and audio. See Transport Stream . #Compression Codec for non-interlaced video signals. #Compression codec for perceptual coding of audio signals. The standard defines three "layers," or levels of complexity, of MPEG audio coding. ## MP1 or MPEG-1 Part 3 Layer 1 (MPEG-1 Audio Layer 1) ## MP2 or MPEG-1 Part 3 Layer 2 (MPEG-1 Audio Layer 2) ## MP3 or MPEG-1 Part 3 Layer 3 (MPEG-1 Audio Layer 3) #Procedures for testing conformance. #Reference software. Reference: ISO/IEC JTC1/SC29/WG11 (June 1996) MPEG-1 VIDEO The MPEG-1 standard was originally designed for 1.5M bit/second data rates and 352x240 resolution. Later improvements allow for up to 4M bit/second for better quality. At present MPEG-1 is the most compatible format in the MPEG family; it is playable in almost all computers and VCD/DVD players. One big disadvantage of the MPEG-1 is that it supports only Progressive Scan video, which is part of the reasons which prompted the more advanced MPEG-2 . SEE ALSO |
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