基于视频码率实时调整传输的QFRC算法研究

Research on QFRC Algorithm Based on Real-time Adjustment and Transmission of Video Rate

随着社会经济的发展,人们对视频传输效率的要求越来越高。如何在带宽有限的情况下提高传输效率成为研究热点。基于此,提出了一种基于视频码率传输实时调整的质量友好速率控制(QFRC)算法。该算法通过对网络延时趋势的判断指标进行传输码率预测,能够很好地避免网络拥塞。该算法在提高无线网络带宽利用率的同时,保持了对传输控制协议(TCP)流的友好性,从而避免了数据传输间的过度竞争问题。

With the development of social economy,the requirement of video transmission efficiency is higher and higher.How to improve the efficiency of transmissionin the case of limited bandwidth has become a research hotpot.Therefore,this paper proposes the control algorithm based on real-time adjustment of video rate transmission.The algorithm can avoid the congestion of wireless network by judging the trend of network delay.The algorithm improves the utilization of wireless network bandwidth while maintaining the friendliness of TCP flow,and avoids the excessive competition between data transmission.