The Algorithm Design Of Video Standard Conversion ASIC

The video standards conversion is a key technology in various applications ofdigital video processing. For most types of monitors, there are many differencesbetween the internal video formats and the image formats the monitor devices needed,which include scan rate, scan standard, resolution, etc. Because these differences thevideo/image standards conversion ASIC is an important module of monitor system.This project focuses on developing a new multi-functions video/image standardconversion ASIC which can realize the conversion of interlaced scan to progressivescan, frame rate up conversion and dimension scaling. Furthermore the functions ofgraphics overlay and man-machine intercommunication are integrated in this chip.And developing our own video/image conversion SOC has great meanings inbreaking the market monopolization of foreign companies and speeding the progressof our TV and related industries.And all these tasks ask for high-quality as well as cost-efficient standardsconversion algorithm.After the simulations, comparisons and analysis, the authorestablishes the motion adaptive algorithm for de-interlacing and frame rate upconversion. The algorithm for de-interlacing is based on the filed averaging and crossfiltering;and the algorithm for frame rate up conversion is based on temporal linearaveraging and motion compensated straight interpolation. No mater the still field ormotion filed, this algorithm can make good result. In addition, the author realized ahigh performance and easy realized motion estimation algorithm, which is based onthe three step searching algorithm and become the base of the ASIC realization offrame rate up conversion.