Digital Tv Transmission Quality Monitoring Techniques Based On Mpeg-2 Transport Stream Analysis And Realization

With the fast developments in TV Broadcast system and TV industry, it calls for higher requirements of supervision of broadcasting TV Broadcast system. Quality supervision of digital TV system includes the system supervision of three important sections, the quality of producing digital TV program, the quality of broadcast and the quality of TV transport, and it needs to use objective and efficient supervision methods. With the development and wide application of MPEG-2 multi-media data compression technology, MPEG analysis has become the basic testing methods of modern TV system operation and equipment development, at the same time being the efficient methods of quality supervision of the digital TV system. In this thesis, MPEG-2 system layer's principle algorithem, measurement and analysis of MPEG-2 transport stream,and supervision of TV Broadcast are studied.This thesis introduces a solution of real-time, accurate and automatic measurement of MPEG-2 transport stream, useing digital logic circuit based on FPGA (Field Programmable Gate Array).The main contents of the dissertation include:Based on "quick and accurate respondence" principle, introduces the whole program; introduces a quick, real-time, accurate program of the analysis and supervision of MPEG-2 transport stream;analyzes the analysis principles of MPEG-2 transport stream and contents of the article in detail; elaborates the working principles of each module of transport stream analysis and supervision circuit, and the design method and the logic realization of the hardware based on FPGA;analyzes the program of transport quality alarm and illegal disturbance early-warning of the satellite channel; integrates the information and byte error of transport stream and designs proper judge principles and alarm levels to solve different degrees of the transport quality problems.