Dale - Computer Science Illuminated 105

Dale - Computer Science Illuminated 105 - 78 Chapter 3 Data...

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Video codec Methods used to shrink the size of a movie Temporal compression Movie compression tech- nique based on differ- ences between consecutive frames Spatial compression Movie compression tech- nique based on the same compression techniques used for still images 78 Chapter 3 Data Representation 3.6 Representing Video Video information is one of the most complex types of information to capture and compress to get a result that makes sense to the human eye. Video clips contain the equivalent of many still images, each of which must be compressed. The Web is full of video clips that are choppy and hard to follow. This situation will likely improve over the next few years, depending on the evolving sophistication of video compression techniques, which are referred to as video codecs. Video Codecs Codec stand for COmpressor/DECompressor. A video codec refers to the methods used to shrink the size of a movie to allow it to be played on a computer or over a network. Almost all video codecs use lossy compres-
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This note was uploaded on 01/13/2011 for the course CSE 1550 taught by Professor Marianakant during the Fall '10 term at York University.

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