Home Knowledge Base MPEG-1



Moving Picture Experts Group Phase 1 (MPEG-1)
File Extention
.mpg, .mpeg, .mp1, .mp2, .mp3, .m1v, .m1a, .m2a, .mpa, .mpv
Internet Media Type audio/mpeg, video/mpeg
Developer ISO, IEC
Extended from JPEG, H.261
Extended to MPEG-2
Standards ISO/IEC 11172

MPEG, abbreviated from the Moving Picture Experts Group, is a standard for compression of video and audio. It is designed to compress VHS-quality raw digital video and CD audio down to 1.5 M bit/s ((26:1 and 6:1 compression ratios respectively) without excessive quality loss, making video CDs, digital cable/satellite TV and digital audio broadcasting (DAB) possible.
Today, MPEG-1 has become the most widely compatible audio/video format in the world, and is used in a large number of products and technologies. Perhaps the best-known part of the MPEG-1 standard is the MP3 audio format it introduced.


The MPEG-1 standard is published as ISO/IEC 11172 – Information technology—Coding of moving pictures and associated audio for digital storage media at up to about 1.5 Mbit/s.

The standard consists of the following five Parts:

  • Systems (storage and synchronization of video, audio, and other data together)
  • Video (compressed video content)
  • Audio (compressed audio content)
  • Conformance testing (testing the correctness of implementations of the standard)
  • Reference software (example software showing how to encode and decode according to the standard)
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