【作者】 田丰；

【导师】 黄浩；

【作者基本信息】 华中科技大学 ， 计算机系统结构， 2006， 硕士

【摘要】 从ATSC制式高清数字电视标准的体系结构出发,深入研究了ATSC制式数字电视系统的各个组成部分以及后端解决方案的常用框架,这些组成部分既包括ATSC制式数字电视前端发射部分技术,也包括了后端接收部分技术。在Trident公司ATSC制式高清数字电视接收机解决方案的基础上,设计了一种应用于ATSC制式高清数字电视接收机嵌入式软件框架,并实现了ATSC PSIP表数据解析模块和OSD显示子模块。嵌入式软件是用户与数字电视交互的接口,在深入研究了Monta Vista与NanoX图形显示库的基础上,提出了相应的模块开发方法。整个系统划分为OSD显示、PSIP表数据解析等功能模块,各模块间通过Socket来进行进程间通信,并协同工作。经分析,要实现ATSC PSIP表数据解析模块与OSD显示子模块,其关键技术主要集中在ATSC A65标准(地面广播与有线的系统信息规划)中规定的信息表(SI)的数据格式与相互关联关系等方面。而对于OSD显示子模块,其关键技术主要集中于如何有效、快捷的利用遵循MPL规范的NanoX图形显示系统库,以开发出可移植性高、扩展性强、维护方便的OSD模块。设计了接收机软件模块,以接收,解码,解复用数字信号,完成了包括EPG(电子节目指南)、音视频输出、图形用户界面等在内的数字电视业务的实现。对深入了解ATSC标准给出了研究思路与方法。测试结果表明,设计的ATSC制数字高清电视接收机能成功显示图形用户界面、电子节目指南等业务。更多还原

【Abstract】 On the basis of ATSC standard HDTV architecture, much research about the components of the ATSC TV system and the prevalent solutions for the back-end design has been done, in which ATSC standard front-end RF technology and back-end receive technology are important essences. A new embedded software architecture is designed on the foundation of HDTV receiver solution supplied by Trident Multimedia. In addition, ATSC PSIP table data parsing module and OSD display module are implemented.After deep study of Monta Vista and NanoX Graphic display library, a whole system solution is developed, which consists of ATSC PSIP table data parsing module and OSD display module. Embedded software is the interface for communications between users and television system. Through processes communication, different modules synchronize their operations.The key technology of implementing the ATSC PSIP table data parsing module emphasizes on variable data format in ATSC A65 standard SI and their internal relationships. As to OSD display module, how to explore high performance software, with well scalability, easy to transplant to other platform, and convenient to maintain and update, by take advantage of NanoX graphic display library conform to MPL standards, is the most important.In this paper, Receiver software module is designed to receive, decode and multiplex the digital signals. EPG, audio and video input/output and GUI practical application in HDTV service have been implemented.The system is tested. The results show that designed ATSC standard HDTV receiver could display the EPG and GUI successfully. However, the system could be improved by added more extended function.更多还原