AVS标准中的视频码流缓冲区校验模型分析

Analysis of Video Stream Buffer Checking Model in AVS

分析了AVS标准和MPEG-2标准中的视频码流缓冲区校验模型,阐述了视频码流缓冲区校验模型的原理,对标准中的相关规定进行了整理和总结,对标准中晦涩难懂的部分进行了解释,对标准中没有明确规定的部分提出了建议。将码流缓冲区模式分成3类,并提出了高延迟模式的概念。通过对编解码过程的分析,推导出编码器维持缓冲区不溢出的条件。

In this paper, the video stream buffer checking model in AVS and MPEG-2 standard is analyzed, the principle of video stream buffer chec- king model is described,the relevant provisions of these standards are summarized, some parts are eaplained which are difficult to understand, and sug- gestions to the ambiguous part are given. The video stream buffer checking model is divided into three classes, the concept of high-delay mode is pro- posed ,the condition is derived which keep the buffer do not overflow in the encoder after analyzing the encoding and decoding process.