MPEG-4 compression was instrumental in making HD possible.

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There is an intense discussion of layers, sectors, modes, error corrections and mpeg-2 video-compression standards.

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The Moving Picture Experts Group (MPEG) has met to issue a draft international standard of a new video-compression format that is twice as efficient as current standards.

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Some have even gone as far as to state that Sony's strategy of using MPEG-2 and uncompressed PCM audio on single-layer Blu-ray discs may have required too much video compression, resulting in early releases that don't match the sharpness of VC-1 encoded movies available on HD DVD.

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