| | Learn more about MPEG-2 in the online encyclopedia. (Site not responding. Last check: ) |
 | | In progressive scan streams, the basic unit of encoding is a frame, while in interlaced streams, the basic unit is a field. |
 | | P and B pictures are first subjected to a process of "motion compensation", in which they are correlated with the previous (and in the case of B pictures, the next) image. |
 | | The "motion vector" that maps the macroblock to its correlated area is encoded, and then the difference between the two areas is passed through the encoding process described below. |
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