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Direct Broadcast Satellite Communications: An MPEG Enabled Service by Donald C. Mead

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Chapter Eight. MPEG 2 Video Compression

Suppose video is represented by frames of 480 pixels vertical by 720 pixels horizontal (the approximate size of CCIR 601-1). These are arrays of numbers that range from 0 to 255, with the value representing the intensity of the image at that point. This video is to be displayed at 30 frames per second.

There are three color planes (and hence three arrays). The bit rate for this video can thus be calculated as:

Image

8.1 The Need for Video Compression

Most studies have shown that the economics of a DBS system require from four to eight TV channels per transponder. If the information bit rate per transponder is ...

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