The Construction Of Digital TV Value-added Business Software System

As technology continues to evolve, it is the trend that digital television will replace analog TV. Along with the development of digital television industry, the market demand not only to digital signal, the more important is interact with other people. Compared to traditional television, the greatest characteristic features of interactive television is enhanced functionality. People can communicate with friends, colleagues, Send and receive e-mail, online exchanges, web browsing, shopping while watch TV. Without disrupting the audience watching TV, interactive TV by providing a wealth of information services, became a real family of multimedia information platform.This paper based on two aspects: Digital television programs transmitted and Digital TV set-top box development projects , Focus on how to construct front-end and client software value-added business software based on the television networks, researched the correlative theory and key technology of the digital TV system, set-top box hardware and software structure and working principle; the characteristics of embedded middleware and work patterns; analysis of the MPEG-2 standard system layer structure, dedicated MPEG-2 program information (PSI) and the DVB service information (SI). digital TV set-top boxes As a transition products from analog TV to digital TV, its highs technical content reflected a multimedia, computer, digital compression, Scrambling and Descrambling algorithms, encryption and decryption algorithms, communications and networks technology level, compared to the development of traditional computer platform, its complexity and costs, development cycle will be Much more complicated, the paper is the right way for the development of such a study.On the basis of research and analyze the key technology and relative standards of digital TV, this paper introduced the principles of Construction Digital TV value-added software system and elaborated How to use existing Internet technology to TV networks to achieve Information query, Interactive entertainment, voice communications etc which already Widespread use in internet and researched how it is achievement in server and client.