Digital Television Data Broadcasting System Erected And Realization

With the rapid development of digital TV technology, the application linked to the digital TV is constantly advanced. Data broadcast becomes the brightest spot in the application of digital TV. Data broadcast is a value-added service extending from the digital TV, which broadcasts all information in the data form to the users by the cable networks. Data broadcast has many ways. The conventional model is the object carousel, which may broadcast against several users. Cable television network multimedia broadcast modulates the digital signal to cable television frequency band, and transports digital information from one point to multi-points in high speed. It uses the cable television network as transmission medium, and supports the services to the majority of cable customers, including e-government, convenient information, remote education, financial & securities information through exploiting the house advantages of wide range, low price, and high-speed bandwidth of cable television networks.As an integral part of the present digital television system, data broadcast involves related standard and extensive things. Based on the DVB standard and data broadcast regulation in the digital television system, through the comparison of the key technology-Data Carousel-in the data broadcast and Object Carousel, the paper tried to adopt Object Carousel as the underlying protocol of the project, and made a deep study of the principle and data structure of Object Carousel. Based on this it designed the implementation structure of the Object Carousel at the receiving end to guarantee better interaction with embedded browser in the STB and provide a complete set of solution from the front to the receiving end.