【摘要】 基于Internet网络的视频通信必须进行差错控制,而差错控制需要准确估计视频流在Internet网络传输中产生的信道失真。对基于Internet网络的视频传输过程进行了失真分析,结合帧间差错扩散的特点和差错帧之间的相关性,提出一种估计包损失失真的通用模型,通过接收端提供的丢包反馈信息,可以准确估计传输中引入的失真。使用JVT/H.264编码的标准视频测试序列进行验证,该模型对信道失真的估计精度比在此之前所提出的其它模型有明显提高。更多还原

【Abstract】 Error-resilient video communication over Internet is designed and operated based on models for the effect of losses on the reconstructed video quality.The paper analyzes the channel distortion for video over Internet and proposes a model that accurately estimates the distortion for general packet loss patterns by accounting for inter-frame error propagation and the correlation between error frames.The accuracy of the proposed model is validated with JVT/ H.264 encoded standard test video sequences where the proposed model provides a significant accuracy gain over prior models.更多还原