Design And Implement Of Data Broadcasting System In CATV Based On DVB

Nowadays Digital TV is being developed vigorously in our country. It greatly enriches program contents and enhances the definition of televised image, however it has not obviously visual difference from Analog TV, which cannot attract many consumers. Therefore now a crucial factor for the development of Digital TV is to utilize the advantages of Digital TV System to develop many new increment services and to satisfy market and customers' requirements. And the Data Broadcasting is the optimal choice.According to the data broadcasting principle of DVB, the thesis designs and implements the data broadcasting system of internet access and of wireless access short-message flat.First data broadcasting system makes use of internet information resources advantages, and accesses internet to the CATV head-end. Plentiful information resources in internet are transformed into transport data of data broadcasting which is classified and organized, and according to DVB internet data is privately defined into transport data syntax sections being transmitted in CATV. At the same time in terminal system STB receives, parses and presents the data, so that consumers can near interactively browse news, weather forecast, market information in single direction CATV networks.Data broadcasting system fully utilizes and increases short-message service of GSM/CDMA. According to DSM-CC download standard of DVB together with concrete condition of short-message service and transmission protocol of data broadcasting, the special function has been implemented in Data broadcasting system. Thus consumers can enjoy individual short-message service and order programs in single direction CATV networks.Finally, the thesis prospects a new technology of data broadcasting, and the technology will provide technical basis for developing more standard and more opening data broadcasting system in CATV.