History of MPEG-1

	Revision 6 . . November 11, 2001 12:31 am by Damian Yerrick [The link calls them "parts" not "layers." Layers refers to audio codecs of increasing complexity and increasing legal encumbrance.]
	Revision 5 . . (edit) October 22, 2001 1:49 am by Hannes Hirzel

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Difference (from prior major revision) (no other diffs)

Changed: 1c1,2

MPEG-1 is the designation for a group of audio and video coding standards agreed upon by MPEG (Motion Pictures Coding Experts Group). MPEG-1 Layer 3 is the full name for the popular audio format MP3.

MPEG-1 is the designation for a group of audio and video coding standards agreed upon by MPEG (Motion Pictures Coding Experts Group). MPEG-1 audio layer 3 is the full name for the popular audio format MP3.

Changed: 3c4

MPEG-1 consists of several standards (termed "Layers"), as follows:

MPEG-1 consists of several parts, as follows:

Changed: 5,8c6,9

Layer 1: Describes synchronization and multiplexing of video and audio. Layer 2: Compression codec for non-interlaced video signals. Layer 3: Compression codec for perceptual coding of audio signals. Also known as MP3. Layer 4: Describes procedures for testing compliance.

#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.