Equalizer In High-definition Television Chip

HDTV (high definition television) technology integrates the most advanced image compressed encoding technology and the digital communication technology; it has become one of the focuses in the high-tech competitions. Having the imitative in this field will take the lead of high technology in the future, and get great chance in the growing market.Equalizer takes an important role in HDTV receiver; its effect on reducing ISI (InterSymbol Interference) holds the balance of performance of the whole receiver. In this paper, structure and algorithm of the equalizer used in cable standard of HDTV VSB (Vestigial Sideband) system and DVB (Digital Video Broadcasting) system are analyzed, and similarities and differences are given in algorithm and ASIC implementation in VSB system is given.In chapter one, the history of HDTV is introduced followed by VSB scheme and DVB scheme.In chapter two, the principle of equalizer is introduced.In chapter three, structure and algorithm of the equalizer used in VSB and DVB are exhibited, and similarities and differences are given, then performance comparison curve is given.In chapter four, we discuss the criterion and design flow of a whole ASIC design and SOC design methodology. Chanllanges and solutions are given in VDSM design.In chapter five, we discuss the implementation of equalizer in the receiver ASIC. The particularities are given such as IP core technology, fast multiplier, and datapath synthesis technology. Then we introduce two verification methods.The most contribution of my paper is to throw out a brick to attract a jade: to design equalizer based on our own national standard will benefit from my comparisons and examples.