MPEG-1
Video encoding standard / From Wikipedia, the free encyclopedia
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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]
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; 32 years ago (1991-12-06)[1] |
Latest release | ISO/IEC TR 11172-5:1998 October 1998; 25 years ago (1998-10) |
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 |
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 (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)