基于SP帧无线视频传输容错编码新方法  

A New Method of Error Resiliency for Wireless Video Transmission Based on SP-Frame

作　　者：胡振[1] 张正华[1] 

机构地区：[1]扬州大学信息工程学院,江苏扬州225009

出　　处：《计算机仿真》2009年第6期134-136,140,共4页Computer Simulation

摘　　要：视频业务误码敏感度高并且有实时性要求,这与无线信道相对较窄的带宽和较高误码率形成了尖锐的矛盾。因此,要在无线信道上开展视频业务,必须在保证视频编码压缩效率的同时,提高视频编码的容错性能。在对新一代视频编码国际标准H.264中SP/SI帧技术研究的基础上,提出一种SP帧与I帧相结合的抗误码扩散方案CSWI。实验证明,CSWI方法抗误码扩散性能比单一地使用SP帧取代I帧更好。The compressed video data are extremely vulnerable to bit errors, and require real time deliver, which conflicts with the low bandwidth and high error rate of wireless channels. Therefore, to realize real time transmission of video traffic over wireless channels, the error resilience of video coding must be improved, without significant compromises in video coding efficiency. Based on researching the SP - frames, a new thought CSWI which can well control error diffuseness was brought forward, and simulation results prove that it is better than the way of only using SP -frames to replace I -frames.

关 键 词：甚低码率 无线信道 抗误码 

分 类 号：TN915[电子电信—通信与信息系统]