一种新型数字SDTV信源解码器的实现  

The Implementation of a New Type of Digital SDTV Source Decoder

作　　者：国澄明[1] 章悦[1] 高宏伟[1] 吕宏伟[1] 傅建军[1] 向小佳[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《信号处理》2004年第2期204-207,共4页Journal of Signal Processing

摘　　要：本文实现了以专用芯片STi5518为核心器件的SDTV信源解码器。该解码器可配接不同制式的前端,组成完整的机顶盒方案;可对符合MPEG-2的视频流进行解码;可对AC-3或MPEG两种音频解码;另外,本系统还实现了硬盘录像和条件接收两个有特色的功能。本文重点叙述该信源解码器的硬件设计和实现原理。An implementation of SDTV source decoder based on ASIC is presented in this paper. Different types of front-end can be connected with it to form a complete DTV set-top box. It can decode MPEG-2 video stream and can decode AC-3 and MPEG Audio stream. It also includes a person video recorder (PVR) and provides the condition access (CA) function. This paper focuses on the principle of its hardware.

关 键 词：数字电视 标准清晰度电视 信源解码器 机顶盒 STI5518 SDTV 

分 类 号：TN949.197[电子电信—信号与信息处理] TN911.21[电子电信—信息与通信工程]