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2002年中国开始制定了新一代数字音视频编解码标准———AVS。由于它采纳了近几年来国内研究的先进音视频编码技术,其不仅与H.264/AVS相比,具有较低的复杂度,并可通过一站式授权方式支付少量费用来获得AVS使用权,因此可作为中国卫星电视直接入户方案的一种较好,且具有竞争力的候选标准。在对AVS和MPEG-2的差异进行比较的基础上,分析了两种在传输系统中替代MPEG-2的方法:直接AVS编码和AVS转码,并给出了一种转码方案,最终实现了新一代基于AVS卫星视频广播系统。
In 2002 China began to develop a new generation of digital audio and video codec standard --- AVS. Because it adopts the advanced audio and video coding technology researched domestically in recent years, it not only has lower complexity than H.264 / AVS, but also can obtain the AVS usage rights by paying a small amount of fees by one-stop authorization Therefore, it can be used as a better and more competitive candidate for China’s direct satellite TV programs. Based on the comparison between AVS and MPEG-2, two methods to replace MPEG-2 in transmission system are analyzed: Direct AVS coding and AVS transcoding, and a transcoding scheme is given. Finally, A new generation based on AVS satellite video broadcasting system.