视频流媒体传输失真研究

Analysis of Video Transmitting Distortion

由于网络传输引起的视频流媒体质量损失(称为传输失真)是流媒体QoS中最重要的参考指标,通常只能在终端系统解码后获得.本文根据视频流媒体编解码、错误隐藏、错误扩散等理论进行分析,提出了一个视频流媒体传输失真模型,该模型可以在发送端通过网络传输质量和视频流媒体特性参数估算视频流媒体的最终表现质量,可以为流媒体同步、控制算法提供定量的参考指标.该模型针对常见的视频流媒体处理机制进行建模,并不局限于特定的编解码格式,具有更广泛的实用价值.

The opening network situation can＇t meet the need of video stream transmission. The lost packets of transmission will decrease the quality of the video stream, we call it distortion of channel. Distortion of channel not only include the lost data, But also include the error propagation of the data. In this paper, we developed a transmission-distortion model. The model could compute the distortion of channel from the video information and channel parameters. Extensive experimental results demonstrated that this model can work correctly.