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| Filename extension |
.mpeg, .mpg, .mpe, .mp1, .mp2, .mp3, .m1v, .m1a, .m2a, .m2v, .mpa, .mpv |
|---|---|
| Internet media type |
audio/mpeg, video/mpeg |
| Developed by | MPEG (part of ISO/IEC JTC 1) |
| Initial release | 6 December 1991[1] |
| Latest release | ISO/IEC TR 11172-5:1998 October 1998 |
| Type of format | audio, video, container |
| Extended from | JPEG, H.261 |
| Extended to | MPEG-2 |
| Standard | ISO/IEC 11172 |
| Open format? | Yes |
| Free format? | Yes |
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.[3][4]
Today, MPEG-1 has become the most widely compatible lossy 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 first version of the MP3 audio format it introduced.
The MPEG-1 standard is published as ISO/IEC 11172, titled 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:[5][6][7][8][9]
- Systems (defining a format for storage and synchronization of video, audio, and other data together in a single file—later dubbed the MPEG program stream to distinguish it from the MPEG transport stream format introduced as an alternative in MPEG-2).
- Video (compressed video content)
- Audio (compressed audio content), including MP3 and MP2
- Conformance testing (testing the correctness of implementations of the standard)
- Reference software (example software showing how to encode and decode according to the standard)
- ^ Cite error: The named reference
11172-draft-citewas invoked but never defined (see the help page). - ^ Cite error: The named reference
mpeg_faqs1was invoked but never defined (see the help page). - ^ Cite error: The named reference
Didier_MPEGwas invoked but never defined (see the help page). - ^ Chiariglione, Leonardo (October 21, 1989), Kurihama 89 press release, ISO/IEC, archived from the original on August 5, 2010, retrieved 2008-04-09
- ^ ISO/IEC JTC 1/SC 29 (2009-10-30). "Programme of Work — Allocated to SC 29/WG 11, MPEG-1 (Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s)". Archived from the original on 2013-12-31. Retrieved 2009-11-10.
{{cite web}}: CS1 maint: numeric names: authors list (link) - ^ ISO. "ISO/IEC 11172-1:1993 – Information technology – Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s – Part 1: Systems". Archived from the original on 2016-11-12. Retrieved 2016-11-11.
- ^ MPEG. "About MPEG – Achievements". chiariglione.org. Archived from the original on 2008-07-08. Retrieved 2009-10-31.
- ^ MPEG. "Terms of Reference". chiariglione.org. Archived from the original on 2010-02-21. Retrieved 2009-10-31.
- ^ MPEG. "MPEG standards – Full list of standards developed or under development". chiariglione.org. Archived from the original on 2010-04-20. Retrieved 2009-10-31.