Mpeg-2 Ts Stream Detector Design And Research

TV Broadcast industry has been approaching into digital era all over the world, as one of the most promising young industry, propagation and popularity of digital TV broadcast would become attractive spot in updating consuming products. As we know, in TV information transmission digital signal can perform better than that of analog signal, so maintenance of digital TV system would be more complex, meanwhile, compared to well-matched and sophisticated monitoring equipments for analog TV system, there are rare such devices in digital system. Standards of digital TV broadcast has specified transmitting systems which are based on various medium such as satellite-oriented transmitting system(DVB-S), cable-oriented transmitting system(DVB-C), terrestrial-oriented transmitting system(DVB-T). Different system adopts different methods of channel codec, modulation and demodulation, but for signal source block codec, only MPEG-2 standard has been applied for all the systems.As a compression standard being specified in digital TV broadcast transmission, MPEG-2 has been widely involved on compression occasion. Thus, there is a close link between quality of digital TV broadcast and"health status"of MPEG-2 stream. MPEG-2 TS"health"check analyzer is just a device for checking TS stream continuously or in a certain period. The"health"check can improve system quality by providing timely reference for maintenance.Based on deep research of structure of MPEG-2 TS stream which is specified by ISO/IEC 13818-1, and also according to ETSI TR 101 290, we designed a real-time"health"check analyzer for TS stream. FPGA-oriented digital logic hardware circuit was used to implement TS stream analyzing in order to get real-time requirement.In this thesis, we would present theory research and its implementation about MPEG-2 TS stream"health"check analyzer. A brief narration about the background of our research and its mean would be put in the beginning. And then we would analyze structure of TS stream and its definition in ISO/IEC 13818-1, data structure of system layer and mechanism of decode would be stressed in this section, later, we would introduce principles and methods of mal-function check in MPEG-2 TS network, parameters being presented by ETSI TR 101 290 would be emphasized in this part.