基于云通信的媒体自适应技术  

Media Adaptation Technology Based on Cloud Communications

作　　者：郭水平 李庆 

机构地区：[1]中国电子科技集团公司第七研究所,广东广州510310

出　　处：《移动通信》2017年第21期37-41,共5页Mobile Communications

摘　　要：云通信系统在移动互联网中应用,受到无线网络环境的影响,容易出现网络带宽低、时延、丢包和网络抖动等问题,导致音视频通话经常出现卡顿、马赛克,甚至中断等情况,使云通信系统可用性下降,因此研究媒体自适应性技术,一方面使音视频流媒体自适应网络带宽,另一方面采用智能抗丢包技术最大限度恢复媒体数据包。经过试验验证,该技术在不稳定传输环境下,音视频通信的可用性显著提高,并且在网络丢包为20%或网络抖动为1000 ms时,音视频通话也能清晰流畅。Affected by the wireless network environment, the applications of cloud communication systems in the mobile Internet are prone to the low network bandwidth, delay, packet loss and jitter. The resulting slowness, mosaic and interruption of voice and video calls lead to the degradation of cloud communication systems. Therefore, the media adaptation technology was investigated to make voice and video flow media adapt to the network bandwidth and recover media packets using the smart anti packet loss technique to the maximum extent. Experiments verified that the technique guarantees the high availability of voice and video communications in the environment of the unstable transmission, and the voice and video calls are clear and fluent in the case of 20% of packet loss ratio or 1000 ms of jitter.

关 键 词：云通信 媒体自适应 抗丢包 抗抖动 

分 类 号：TP915.6[自动化与计算机技术]