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MPEG-1 is the designation for a group of audio and video coding standards agreed upon by MPEG (Moving Pictures Experts Group). MPEG-1 video is used by the Video CD format. The output quality at usual VCD bitrates is less than that of a VCR.
MPEG-1 audio layer 3 is the full name for the popular audio format MP3.
MPEG-1 consists of several parts, as follows:
- Synchronization and multiplexing of video and audio.
- 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.
- Procedures for testing compliance.
Reference: ISO/IEC JTC1/SC29/WG11 (http://www.chiariglione.org/mpeg/standards/mpeg-1/mpeg-1.htm) (June 1996)
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