Study Of Video Compression Theory And The Design And Application Of Electronic Program Guide

There are two kinds of signals composing the audio/video information. One is predictable, which is called entropy, the useful information of the audio/video signal, the other is not predictable, and not necessary, which is called redundancy. Redundancy may be spatial or temporal. The aims of all the compression systems are the same, abstract the entropy from redundancy, and save or transport entropy only. Digital TV system is one of the most important system applying the technology of codec theory. And the Set-Top-Box is a embedded system in charge of the codec of the audio and video. The essay introduced the key technologies of video compression and the booming technologies with the development of codec standard. And also describe the design of one of the most important applications of STB. In the design of EPG, I realized the receiving, the organization, the providing and the displaying of the data.