6 Video Compression
Once you get past a few hundred kilobits-per-second, it's possible to deliver pretty good quality video and sound.
Vinton Cerf
Video signals used to deliver IPTV and Internet video are always compressed. Compression means reducing the number of bits required to represent the video image. This is an important topic because choosing a suitable compression method can sometimes mean the difference between the success and failure of a video networking project.
This chapter begins by explaining the reasons for compression and looks at some of the factors that determine what form of compression is suitable for an application. Then, it examines MPEG video compression, as it is the most widely used technology for video and audio ...
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