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Name: MPG
Acronym: Moving Pictures Experts Group
Introduced by/when:
Extension: MPG1, 2, 3 or MPEG-1 Part 3 Layer 1,2,3
MPEG-1 consists of several "parts", as follows:
1. Synchronization and multiplexing of video and audio.
    2. Compression codec for non-interlaced video signals.
        3. Compression codec for perceptual coding of audio signals. The standard defines three "layers," or levels of complexity, of MPEG audio coding.

1. MP1 or MPEG-1 Part 3 Layer 1 (MPEG-1 Audio Layer 1)
    2. MP2 or MPEG-1 Part 3 Layer 2 (MPEG-1 Audio Layer 2)
        3. MP3 or MPEG-1 Part 3 Layer 3 (MPEG-1 Audio Layer 3)
            4. Procedures for testing conformance.
                5. Reference software.