一．序言随着互联网的飞速发展,消费类电子、通信、电视、电影、广播、计算机技术日益紧密地结合起来, 计算机与通信、娱乐业融合的趋势不可逆转。近年来,随着数字技术的飞速发展,音视频领域也正在走向数字化,从而使得数字音视频产业成为本世纪初发展 one. Preamble With the rapid development of the Internet, the increasingly convergence of consumer electronics, telecommunications, television, film, radio and computer technologies has led to an irreversible trend in the convergence of computer and communications and entertainment industries. In recent years, with the rapid development of digital technology, audio and video fields are also going digital, making the digital audio and video industry become the beginning of this century