基于RTP/RTCP主动丢包的立体视频传输研究

摘要

For the data of stereo video is much larger and the current network ’ s bandwidth cannot be upgraded immediately, it is easy to cause the network congestion problem in transmission. An end-to-end transmission control mechanism is proposed. In NS-2 platform,according to the feedback information,the number of packet loss is calculated in the feedback internal of RTP/RTCP and the characteristics of different frames with different importance, an active packet loss method at the sending is adopted to discard the less important data and to ensure the more important data transmit in advance. Experimental results show that the method can effectively protect important frames and increase frames which can be decoded and the smoothness of the video. Compared with congestion control of without the protection,the decoded frames can be increased by more than 25%.%针对立体视频数据量大容易在传输过程中导致网络拥塞的问题，提出一种端到端的拥塞控制传输机制。在NS-2平台上，根据RTP/RTCP在反馈间隔内对丢包个数的反馈信息以及各帧重要性不同的特点，采用在发送端主动丢包的方法优先丢弃不重要的数据，保证较重要的数据信息优先传输。实验结果表明，该机制能有效保护重要帧，增加可解码帧数，增强视频平滑度，与不采用保护拥塞控制相比，可解码帧数均能提高25%以上。