Macroblock

A processing unit in image and video compression formats based on linear block transforms, typically the discrete cosine transform (DCT).

Macroblock is a processing unit in image and video compression formats based on linear block transforms, typically the discrete cosine transform (DCT). A macroblock typically consists of 16×16 samples, and is further subdivided into transform blocks, and maybe further subdivided into prediction blocks. Formats that are based on macroblocks include JPEG, where they are called MCU blocks, H.261, MPEG-1 Part 2, H.262/MPEG-2 Part 2, H.263, MPEG-4 Part 2, and H.264/MPEG-4 AVC. In H.265/HEVC, the macroblock as a basic processing unit has been replaced by the coding tree unit.

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Adapted from content published on wikipedia.org
Last modified on March 2, 2020, 5:02 am
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