Research On Technique Of Evaluating DTV

Digital is a new technology revolution and an inevitable trend of broadcasting TV technology. In recent years, along with the development of the electronics, micro-electronics, computer and communication technology, digital processing and transmission of image and sound information have been improved. The digital video system has already entered practical stage. The digital audio and video products have already entered the daily life. With SDTV (standard definition TV), HDTV (high-definition TV) starts broadcasting systematically, the system of the analogue TV is transformed to the system of the digital TV. In the near future, the digital TV necessarily replaces the analogue TV.With the DTV starts broadcasting, it is greatly concerned that which terminal TV display devices or screens should be selected. Except for traditional display devices such as CRT(Cathode Ray Tube), the productive technology for those TV display devices or screens with intrinsic resolution such as LCD(liquid crystal display), PDP(Plasma Display Panel), DLP(Digital Light Processing) and LCoS(liquid crystal on silicon) has become mature gradually, LCD and DLP become the main products. As terminal, quality of TV display devices or screens greatly influences the effect of being viewed, and its cost occupies most of equipment including receiver and display.MPEG-2 standard established by MPEG(Moving Picture Expert Group) is the general international criterion followed by both SDTV and HDTV system. SDTV and HDTV signal are transmitted in the format of Transport Stream(TS). Before and during the use of DTV system, it should be tested that whether different kinds of TS is accorded with MPEG-2 or idiographic standard of different countries. A great deal of test signal with various parameters is required by system design, manufacture, testing and service. To those new types of display devices, relevant signal should be studied and supplied. All of the requirements above are the great impetus to this research.This thesis is focused on quality evaluation of DTV system. It is divided into two parts. One is the study of conformance evaluation and tests method for DTV signal and TS, the other is mainly for evaluating the quality of DTV terminal display equipment.In evaluating quality of DTV TS, structure and syntax of TS system have been deeply parsed according to study on coding and decode principle of DTV signal resource, multiplex of TS and related standard. Audio and video information of single...