【作者】 袁亚斌；

【导师】 杨兆选；

【作者基本信息】 天津大学 ， 信号与信息处理， 2004， 硕士

【摘要】 数字电视机顶盒是由模拟电视向数字电视过渡的中间产品。结合我国国情，对数字有线电视机顶盒的开发具有重要的实际意义。在数字电视机顶盒的开发研制中，软件系统的研究和设计是整个开发工作的难点和重要组成部分，软件系统的设计直接关系到产品的最终性能。本论文的主要工作是在研究数字电视机顶盒相关技术和硬件结构的基础上，设计软件系统实现信道、信源解码以及图形用户界面(GUI)的目的。该机顶盒以LSI Logic公司的单片信源解码器SC2000为主芯片进行设计。本课题在开发平台示例软件的基础上，开发了DVB-C机顶盒信道解码驱动程序以及上层应用程序；在上层通过对FLASH的驱动程序调用，实现了用户参数的FLASH存储；通过进行图形设计和编程实现了用户界面和操作的简洁化设计；并尝试使用字体库实现中文字符的设计。本课题设计的软件系统在前期开发的机顶盒硬件系统上已经通过了调试，已经较好的实现了预期的功能和效果。本论文首先简述了数字电视机顶盒以及相关的MPEG-2、DVB标准等，而后简要介绍了机顶盒硬件系统各部分及其主处理芯片，接着重点讨论软件系统的各部分知识以及所做的工作，并给出了功能调试测试结果。另外，文中还对实时操作系统pSOSystem和软件集成开发环境(IDE)也进行了简单介绍。更多还原

【Abstract】 Digital TV Set-Top Box is the transient product from Analogue TV to Digital TV. So in view of the situation of our country, it has the practical importance to develop the DVB-C Set-Top Box. In the research of STB, software research and design is the most difficult and is the key component. The final product performance has the direct relations with the software design.Based on the research of the technologies of Digital TV STB and the survey of STB’s hardware architecture, the thesis aims at the software design to realize the channel decoding, source decoding and Graphical User Interface (GUI). The solution is based on LSI’s single source decoding chip called SC2000. Referring to the demo of develop platform, we develop the driver and application layer of DVB-C STB’s channel decoding; using API of FLASH drivers, we implement the storage of users’ parameters; using graphical design and program, we achieve our aim to make GUI clean and easy; using Chinese font, we attempt to implement Chinese character display. Through the debugging on the former developed STB hardware board, software system has achieved the aim of expected function and performance.Firstly, the thesis introduces digital TV STB, MPEG-2 and DVB standard; secondly, presents STB’s hardware architecture and it’s main chip in brief; finally tells of the software design and my own work on it, also the debugging information and test result is mentioned. In addition, the thesis introduces the RTOS of pSOSystem and the software IDE.更多还原