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What is the difference between MPEG-1 and MPEG-2 syntax?

April 26, 2017mpeg-1 MPEG-2 syntax

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What is the difference between MPEG-1 and MPEG-2 syntax?

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Overview of decoding “pipeline”: Section D.9 of ISO/IEC 13818-2 is an informative piece of text describing the differences between MPEG-1 and MPEG-2 video syntax. The following is a little more informal. Sequence layer: MPEG-2 can represent interlaced or progressive video sequences, whereas MPEG-1 is strictly meant for progressive sequences since the target application was Compact Disc video coded at 1.2 Mbit/sec. MPEG-2 changed the meaning behind the aspect_ratio_information variable, while significantly reducing the number of defined aspect ratios in the table. In MPEG-2, aspect_ratio_information refers to the overall display aspect ratio (e.g. 4:3, 16:9), whereas in MPEG-2, the ratio refers to the particular pixel. The reduction in the entries of the aspect ratio table also helps interoperability by limiting the number of possible modes to a practical set, much like frame_rate_code limits the number of display frame rates that can be represented. Optional picture header variables ca