随着全球信息化时代的到来,人们了解事物、交换信息的途径已经从纸、笔、书本、话音等发展到通过声、光、电信号等各种方式更准确、更快捷、更丰富地表达出来。由于超大规模集成电路(VLSI)、计算机和通信技术的迅速发展和结合,促进了视频技术的进步与广泛应用。多媒体计算机、多媒体通信、信息高速公路、高清晰度电视、高宽带综合业务数据网等都是围 With the advent of the global information age, people have come to understand things and exchange information from paper, pen, books and voice to more accurate, faster and richer ways through sound, light and electric signals. come out. Due to the rapid development and integration of very large scale integrated circuits (VLSI), computer and communication technologies, advances in video technologies and their widespread application have been promoted. Multimedia computers, multimedia communications, information superhighway, high-definition television, high-bandwidth integrated business data networks are Wai