| Recently, the global market of digital TV has been growing up rapidly. In China, the traditional analog TV broadcasting system is transiting to the new system based on digital and network technologies. The national DTV industry that has a vast market is coming into being. In the world, the products of DTV set-top box weed through the old to bring forth the new and gain more and more users with different backgrounds. As a result, in our country the manufacturers, companies and scientific & technological circles being engaged in developing DTV terminal products, are faced with new opportunities and challenges.Against this market background, according to the job in the STB developing project, the author completed the works in the following three aspects.Design of the advanced functions for PDR based on MPEG-7 standard.Design of the generic software framework for DTV terminals.Development of DTV related products (MPEG-2 TS generator and STB).Three main innovations introduced in this dissertation are as follows.A description scheme based on MPEG-7 for commercial advertising program is proposed and the personalized viewing of advertisements is realized. PVR can help viewers to skip the advertisements in TV programs. However, this function will decrease the incoming of the broadcasters from advertising. It invokes the contradiction between broadcasters and PVR users. The scheme studied makes the broadcasting and viewing of advertisements achieve respective aims well and meet the demands of both the broadcasters and viewers.A unified program resource managing scheme is proposed. It accords with viewers' habits better than the corresponding schemes currently used for PVR products do. Scheduled video-on-demand and scheduled recording that are based on the scheme also have better performances than that of the existing schemes.An MPEG-7 metadata parser is designed and supplemented to the implementation of DTV middleware standard. It will support future advanced applications based on metadata.
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