基于DVB-T的数字机顶盒接收前端实现

接收前端是机顶盒系统的关键组成部分,在介绍欧洲地面数字广播电视的原理和系统框架的基础上,本文设计并实现了符合DVB-T标准的数字机顶盒的前端接收系统.硬件芯片选择了Philips公司的TDA6651TT和ST公司的Stv0360,分别实现了对地面数字信号的调谐和解调,输出符合MPEG-2标准的传输流,并在此基础上叙述了前端控制软件的调谐搜索过程.该前端已在实际机顶盒系统中经过测试,实现了对数字地面广播信号的成功接收.

Implementation of digital set top box receiver front-end based on DVB-T

Receiver front-end is very important in a set top box system.Based on the introduction of the current status and system structure of Europe Digital terrestrial TV broadcasting,this paper mainly introduced the system design and implementation of the front-end of digital set top box compliant with DVB-T standard.This system selects TDA6651TT(Philips Corp.)and Stv0360(ST Corp.)as its tuner and demodulator chip,and outputs MPEG-2 transport stream.Software flow of the searching process is also expatiated.This platform has been tested in a practical STB system,and has received the digital terrestrial broadcast signal successfully.