Research And Design Of OTA Based On DVB Digital Terminal Equipment

Nowadays,digital television,set-top boxes and other terminal equipment has been widely used in daily life,Digital television broadcasting technology has become the standard,the research on DVB digital television broadcasting standard is conducive to more in-depth understanding of the transmission and processing of digital television broadcast signal,which has important significance to promote the application of.Meanwhile,the number of digital terminal equipment in recent years has grown exponentially functional requirements tend to diversity,to upgrade the software on the terminal device has become the basic needs of users,while the OTA upgrade because of its convenience to obtain the widespread attention,through the research and design of it,will help us more in-depth understanding.Firstly,in this paper,it provides an overview of digital television,but also describes the several standard used widely in the field of digital television,mainly introduces the framework and architecture of the DVB standard,a detailed analysis of the various tables defined in the ISO/IEC 13818-1 and ETSI EN 300 468 standard.Then according to the analysis of various structures of the table,indicating that OTA-upgrade feature used in digital satellite broadcasting system DVB-S field,and the realization of the principle of the function module.The article analyzes the OTA upgrade process,the data transmission is based on the DSM-CC protocol,and then the data format of TS transport stream that support OTA upgrade is defined,the data package will be upgraded in accordance with the custom format,Designed the OTA upgrade process of accessing,downloading,and restoring the information,complete the design of terminal equipment software,including the user interface,the application programming interface of middleware layer,finally is implemented and tested on the Sunplus1512A set-top box platform.Through the OTA fully functional and successful application of analysis on the system,it can easily make the appropriate customized according to user needs,geographical features,and promote the application of OTA function in the digital terminal equipment.