摘要
无线视频传输中误码和丢包会导致视频质量的严重下降,研究了视频传输中的错误控制相关技术。对已有的无线视频错误控制方法进行了详细分析,在此基础上提出了一种更加有效的无线视频传输中的错误控制框架。将无线误码丢包和拥塞丢包准确区分,改进了以往算法带宽估计公式不准确的问题。并且对视频内容根据在解码端重要性的不同区分保护。在错误控制的同时进行了拥塞控制。
Error bits and packet loss can cause video quality degrade sharply in wireless video transmission.In this paper,error control techniques are studied.Existing wireless video error control methods are analyzed in detail.On the basis of the analysis,an effective adaptive forward error correction mechanism is brought forward.In this framework,two kinds of packet losses are differentiated accurately.The problem of previous algorithm bandwidth estimation being not accurate is improved.Different video contents are protected according to the different importance at the decoding end.Wireless loss and congestion are controlled simultaneously.
出处
《无线电工程》
2007年第10期44-46,49,共4页
Radio Engineering
基金
国家自然科学基金(60572122)
华为高校合作基金项目(YJCB2005055WL)资助
关键词
无线视频
前向纠错
丢包区分
带宽估计
wireless video
forward error correction
loss differentiation
bandwidth estimation
