基于H.264-SS与FGS结合无漂移比特流切换方案  

A Scheme for Seamless Bitstream Switching Based on the Combination of H.264-SS and FGS

作　　者：姜钦华[1] 刘志[1] 张兆杨[1] 张颖[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《中国图象图形学报》2006年第11期1570-1573,共4页Journal of Image and Graphics

基　　金：上海市科委重点攻关项目(055115008);国家自然科学基金项目(60332030)

摘　　要：流媒体应用中,为了满足可用带宽的变化常需要动态地调整比特流码率。由于H.264/AVC支持同步预测(SP)帧,并允许在大范围内的不同质量比特流之间进行切换,而MPEG-4又支持FGS编码,使得比特流小范围可调,因此为了充分利用两者的优点,给出一种将两者融合在一起的解决方案,并采用自适应码率选择方法,使传输的比特流既能适应网络传输带宽的大范围变化,又能灵活适应小范围的带宽波动,且平均峰值信噪比值可较明显提高。In order to content with the constraint of available bandwidth variation, the sever needs to switch bitstreams dynamically in streaming applications. H. 264/AVC supports SP-frame that enables high efficiency of switching among bitstreams of different qualities over larger bandwidth, and over little bandwidth fine granularity scalability video coding is supported by MPEG-4. In the paper, for make good use of the two advantage propose a seamless bitstream switching scheme that combines two tools and use self-adaptation bit-rate selection scheme for both high bandwidth variations of networks and low bandwidth variations, which is efficient for improving average PSNR from experience results.

关 键 词：H.264/AVC 精细可分级 流切换 自适应码率选择 

分 类 号：TN919[电子电信—通信与信息系统]