Moving Picture Experts Group

From Wikinfo

For the Motion Picture Editors Guild also known as the MPEG, see Motion Picture Editors Guild.

The Moving Picture Experts Group, commonly referred to as simply MPEG, is a working group of ISO/IEC charged with the development of video and audio encoding standards. Its first meeting was in May of 1988 in Ottawa, Canada. As of late 2005, MPEG has grown to include approximately 350 members per meeting from various industries, universities, and research institutions. MPEG's official designation is ISO/IEC JTC1/SC29 WG11.

MPEG has standardized the following compression formats and ancillary standards:

• MPEG-1: Initial video and audio compression standard. Later used as the standard for Video CD, and includes the popular Layer 3 (MP3) audio compression format.
• MPEG-2: Transport, video and audio standards for broadcast-quality television. Used for over-the-air digital television ATSC, DVB and ISDB, digital satellite TV services like Dish Network, digital cable television signals, SVCD, and with slight modifications, as the .VOB (Video OBject) files that carry the images on DVDs.
• MPEG-3: Originally designed for HDTV, but abandoned when it was realized that MPEG-2 (with extensions) was sufficient for HDTV. (not to be confused with MP3, which is MPEG-1 Layer 3.)
• MPEG-4: Expands MPEG-1 to support video/audio "objects", 3D content, low bitrate encoding and support for Digital Rights Management. Several new higher efficiency video standards (newer than MPEG-2 Video) are included (an alternative to MPEG-2 Video), notably:
  • MPEG-4 Part 2 (or Advanced Simple Profile) and
  • MPEG-4 Part 10 (or Advanced Video Coding or H.264). MPEG-4 Part 10 may be used on HD DVD and Blu-ray discs, along with VC-1 and MPEG-2.

In addition, the following standards, while not sequential advances to the video encoding standard as with MPEG-1 through MPEG-4, are referred to by similar notation:

• MPEG-7: A multimedia content description standard.

• MPEG-21: MPEG describes this standard as a multimedia framework.

See also

• Audio codec
• Video codec
• Video quality
• Video compression
• Pro-MPEG

External links

• Official MPEG web site
• MPEG Industry Forum (MPEGIF)
• MPEG-related pointers & resources
• MPEG2 Overview
• A free command-line tool for manipulating MPEG files

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Adapted from the Wikipedia article, "Moving Picture Experts Group" http://en.wikipedia.org/wiki/Moving_Picture_Experts_Group, used under the GNU Free Documentation License.
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