有线数字电视机顶盒技术及应用

Set-Top Box and Its Application of CADTV

利用数字电视机顶盒,用户可以在模拟电视机上收看数字电视节目,并可实现交互式服务功能。数字电视机顶盒由控制子系统、信号处理子系统、网络接收子系统、用户扩展接口子系统等组成,其技术含量高,主要包括:复用和解压缩技术、下行数据解调与信道解码技术、上行数据的调制编码技术、网络浏览技术、实时操作系统及中间件技术等。

Utilizing the set-top box of the digital TV, users can watch the digital television program on the analogue TV, realize the interactive service function. Digital TV set-top box is composed of controlling subsystem, signal dealing with subsystem, network receiver subsystem, user expand interface subsystem etc. Its technological content is very high mainly including multiplexing and dispel-compressing technology, down data demodulation and channel decode technology, up modulation code technology, network data browse technology , real-time operating system and the middle pieces technology etc.