无线网络中基于H.264/SVC的RoI视频流传输  

Transmission of RoI Video Stream Based on H.264/SVC in Wireless Network

作　　者：袁涛[1] 樊丰 

机构地区：[1]成都电子科技大学电子工程学院,四川成都611731

出　　处：《电视技术》2011年第5期29-31,34,共4页Video Engineering

摘　　要：在无线网络中,由于无线终端的多样性和无线信道带宽多变、易受干扰,视频传输面临着极大的挑战,针对无线网络的这些特性,为了能满足不同终端的不同需求,对H.264/SVC码流进行RoI(感兴趣区域)码流转换;为提高传输效率,提出一种基于丢包率检测的带宽估计模型。然后,在NS2上建立一个仿真系统,对所提算法进行验证,结果表明,所提算法使得视频流在无线网络中进行可靠地传输,并且提高了视频的主观效果。In the wireless network, because of the variety of the clients and the channel fluctuating and being disturbed easily, it is a great challenge to transport video stream. In this paper, we present a video structure of RoI steam transcoded from H.264/ SVC stream, and this video stream can supply various streams to different clients. In order to improve the efficiency of transmission, we present a bandwidth estimation model based on testing the packet-loss rate. Then we set up a experiment system on NS2 and test the proposed algorithm. The results show that using the proposed algorithm can make the video stream transported reliably in the wireless network and heighten the subjective effect of the video.

关 键 词：H.264/SVC标准 感兴趣区域 丢包率 带宽估计 

分 类 号：TN919.85[电子电信—通信与信息系统]