Research And Realization Of Digital Media Content Indexing And Mapping

After years of development of digital television, transmission and reception technology continues to mature, Services provided by TV show a trend of diversification. In order to give full play to the characteristics of cable transmission bandwidth, many cable operators are carrying out the push program service. Users can store and then watch programs, thus breaking the original service mode. However, the set-top boxes are limited by computing and storage capacity, once the contents cost the large amount of storage, set-top box very difficult to manage content. Meanwhile, in the existing broadcasting technology mechanism, users are difficult to the select the pushed contents.Digital media content indexing is a feature extraction and identification guide the process, its purpose is to describe the transmission characteristics, revealing the contents of features, easy to focus on similar content, distinguish between different content, to establish contacts for the relevant contents. It consists of content classification, content sources, content attributes, and broadcast information. At sending end, content indexing of information is real-time embedded in the program data package. By using broadcast network, the contents with indexing are pushed to the receiving end. At the receiving end, with using content indexing technology, users can choose their own interest in the content, by comparing the indexing in receiving end and content data packets. And retain the contents are matched, allowing customization of content. At the same time the receiving end can also automatic classify and aggregate the contents of preserved according to content indexing information, and can create electronic program guide freely. The pushing technology with content indexing realizes in one channel to provide a number of different sources of content, breaking the interval between channels. And it significantly improve broadcasting production capabilities in many aspects.Based on the above design idea, this paper start from the basic background knowledge, and analyze the content indexing and mapping methods of design requirements. in full understanding of the current status of the development of radio and television, From the indexing representation, indexing, mapping method, the file push mechanism, the terminal display mode of analytic methods and research in five areas proposed digital media content, said method of the digital media content indexing and mapping method. In order to prove the feasibility of the technology, we develop three content indexing validation software, generated indexing software, broadcast control software and client software, and use these software to build the verification system.in the process of Software development, we put forward system composition and the main workflow. Authentication system proposed technical solutions and verification methods under the conditions of the broadcast channel. We focus on the capture of digital media content indexing generation technology, one-way broadcast transmission technology and reliable files transmission technology, content control technology, client-side data handling technology and other key technologies. Finally, after Telecom and Technology Research Institute tests, that demonstrates the project results to meet the project's design requirements.