Design And Implementation Of Embedded Software On The ATSC High-Definition Digital Television

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.