Joint Rate Allocation and Buffer Management for Robust Transmission of VBR Video

在这份报纸我们在场在接收装置与播放调整机制在来源集成率分配和缓冲区控制的一个适应录像传播框架。传播率被使用在录像流嵌入以一个精制方法调整传播率的程序钟引用(PCR ) 的一个率分配算法决定。服务者方面也维持多重缓冲区让一些不同重要性层次根据来源缓冲区尺寸，视觉影响，和播放截止时间为控制损失做贸易离开随机的损失。在边界上播放调整机制基于 proportional-integra (PI ) ，控制器在接收装置被采用根据全面损失和接收装置缓冲区占有最大化显示的录像的视觉质量。我们的建议框架的表演在模拟以山峰 signal-to-noise 比率(PSNR ) 被评估，并且模拟结果象译码的框架的更好的质量一样表明平均 PSNR 价值的改进。

In this paper we present an adaptive video transmission framework that integrates rate allocation and buffer control at the source with the playback adjustment mechanism at the receiver.A transmission rate is determined by a rate allocation algorithm which uses the program clock reference（PCR）embedded in the video streams to regulate the transmission rate in a refined way. The server side also maintains multiple buffers for packets of different importance levels to trade off random loss for controlled loss according to the source buffer size,the visual impact,and the playback deadline.An over-boundary playback adjustment mechanism based on proportional-integra（PI）controller is adopted at the receiver to maximize the visual quality of the displayed video according to the overall loss and the receiver buffer occupancy.The performance of our proposed framework is evaluated in terms of peak signal-to-noise ratio（PSNR）in the simulations,and the simulation results demonstrate the improvement of the average PSNR values as well as the better quality of the decoded frames.