基于Linux平台的数字电视机顶盒应用升级机制的研究和设计

Research and Design of Application Upgrade Mechanism in Digital TV Set-top-box Based on Embeded Linux

在研究DVB规定的系统软件升级协议的基础上,结合嵌入式Linux的特点,设计出数字电视机顶盒前端升级数据的制作方案,在前端升级流打包方案的基础上,结合机顶盒硬件平台的特性,设计并实现Loader系统的各个模块,包括搜索模块、过滤模块、下载模块和存储控制模块。最后,对本设计的应用升级系统的功能进行测试,测试结果表明,应用升级系统功能完善,能够快速定位升级数据流并准确升级,能够检测出各种升级错误,并且性能良好。

With the study of the System Software Upgrade agreement which is developed by DVB system,com-bined with the features of Linux designed upgrade data production proposal of front-end.Combined with the features of STB hardware platform design and implement each module of the Loader system,including search module,filter module,download module and memory control module.Finally,the application upgrading sys-tem is tested.The test results show that the function of application upgrading system is perfect.The Loader system can locate the upgrade fata stream quickly and accurately and can detect a variety of upgrade error. The system has a good performance.