立体视频分级网络传输码率平滑方法  

Smoothing Method for Scalable Network Transmission Rate of Stereo Video

作　　者：顾锋[1,2] 孙军[1,2] 周军[1,2] 

机构地区：[1]上海交通大学电子工程系图像通信与信息处理研究所,上海200240 [2]上海交通大学上海市数字媒体处理与传输重点实验室,上海200240

出　　处：《计算机工程》2011年第13期221-223,共3页Computer Engineering

基　　金：国家"863"计划基金资助项目(2009AA01A3336;2008BAH28B04);下一代互联网示范工程(CNGI)基金资助项目(CNGI-09-01-02);上海市科委基金资助项目(10511501102)

摘　　要：立体视频视角分级后会造成各视角码流的码率波动过大的现象,对网络传输及终端造成冲击。为解决该问题,提出一种自适应双缓冲码率平滑策略实现视角分级后的码率平滑。该方法根据视角分离后码率抖动的特点,在发送端对各视角码流进行两级缓冲码率平滑。不同视角的码流经过视角分离后存入各自缓冲区中并按帧率向第2级发送码流进行第1级平滑,经过第1级平滑后的码流再存入第2级缓冲区中并根据第2级缓冲区的使用率调节向外发送码流的速率达到再次平滑的效果。实验结果表明,该方法能够较好地实现视角分离后的码率平滑。The rate jitter of different views of stereo video becomes much larger after separated depending on the classification of views.An adaptive double-buffered rate smoothing method is proposed to solve this problem.According to the peculiarity of rate jitter,the method applies two-stage rate smoothing policy on each view at the server side.The stream of one view is stored into a buffer and then sent to second stage according to the frame rate at first stage.At second stage,stream receives from first stage and then sends out according to the buffer occupancy rate.Experimental results validate the method can effectively deal with rate jitter

关 键 词：视角分离 分级网络传输 自适应码率平滑 缓冲区使用率 检测速率 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]