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

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