Digital Tv Middleware Technology

With the mature development of digital television technology, interactive tele- vision becomes developing direction of digital television. For realizing interactive television services such as Video On Demand(VOD),interactive advertisement, online browsing, interactive game etc, we must adopt digital television middleware tech- nology. In order to advance the development of digital television technology of our country, the digital television middleware standard of China is instituted. According to this standard, developing the middle system with Chinese characteristics and independent intellectual property right is the focal point that China's digital television development.This paper studies digital television middleware technology and Java technology. According to the Chinese middleware standard, using the experience of others middleware product for reference, this paper proposes a realizing scheme of digital television middleware base on the hardware environment and operating system of set-top-box. The hardware part of this scheme adopts Sti5516 chip, the software part adopts Java technology .This scheme regards CDC as Java platform which is ported to OS20 operating system. CDC reference implement is offered Sun company which is based on Linux operating system. And this scheme use Personal Profile of J2ME and Java TV API to offer standard interface for application program.Then, this paper has given the realization of Java platform in the Sti5516 set-top-box, which is the part of the scheme. The work for realizing Java platform is modifying the part of correlating with St20cc compiling machine, OS20 operating system and ST20-C2 CPU. At last, this paper has told the test for realization of Java platform. Through the test result, draw the conclusion that Java platform normally runs and simple Java application programs can run in the set-top-box.