Research And Design Of Digital Cable Tv Service Platform For Electronic Program Guide (epg)

Electronic Program Guide (EPG) is one of the very important applications of the Digital TV and is the gateway for the consumers watching the Digital TV. By EPG, consumers can enjoy the luxuriant information services by browsing the programs expediently, learning the information completely, and orienting the positions efficiently. At the same time, EPG win the favorable comments by consumers. So, the page layout of the EPG can be the excellent advertising carrier. Many businessmen are willing to broadcast the advertisements by EPG, and gain profit richly. According to some data, comparing with other services of Digital TV, EPG is bestowed mostly, and by this reason, almost every master builder regard it as one of the most important services of Digital TV. Some master builders even retain some professional company to take charge of custom-built EPG services. EPG has been applied extensively in USA and European countries where the DTV is developed much early. Although some TV station has been manufacturing and broadcasting the DTV programs, the Chinese DTV still be placed in the entry-level stage. The matter of DTV broadcasting is constituted from two parts: program stream and EPG data. Because of the different types of products, the EPG is different from each other. Some broadcast SI table completely, some broadcast a part; some has private table or private descriptor, some exclude other expansions; some broadcasting frequencies follow the SI criterion, some conflict with the SI criterion. Most EPG functions of the set-up boxes in the market are achieved by private information formats. This way has a lot of discommodities to master builders to choose the set-up boxes. This thesis summarizes the principium, the procession, and the hardware structure of the EPG system, analyze the information model by lucubrating the MPEG-2 TS, PSI and SI. The main function of PSI is de-multiplexed and decoded...