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提出了一种端到端的方法解决可伸展视频在因特网上鲁棒传输的问题.传统方案由于没有同时考虑媒体本身的特性、网络信道状况以及优化的数据封装等因素,所以在易发生信息错误的环境下(例如网络丢包)不能得到全局优化而保证高质量的视频传输.针对可伸展视频的特点,给出了一种端到端的网络自适应的拥塞控制和非均衡的错误控制因特网视频传输方案,该方案根据网络状况动态调整发送速率,具有抗网络噪声的特性.考虑到多媒体传输的要求,描述了媒体拥塞控制来平滑媒体流的发送速率和预测网络可用带宽的方案.在数据包的层次上,提出了具有非均衡数据交织封装的错误保护方案,很好地减轻了网络丢包对接收视频的影响,并且进一步发展了可伸展视频在因特网传输中的率失真理论,从而给出了最优的比特分配方案,可以在信源码流和错误控制之间优化地分配可用网络带宽资源.大量的实验结果表明该方案能很好地解决可伸展视频在因特网中的传输问题.
An end-to-end method is proposed to solve the problem that the scalable video can be transmitted robustly on the Internet.As the conventional scheme does not consider the characteristics of the media itself, the status of the network channel and the optimized data encapsulation, In the environment (such as network packet loss) can not be global optimization and ensure high-quality video transmission.According to the characteristics of scalable video, an end-to-end network adaptive congestion control and unbalanced error control are provided. Internet video transmission Which adjusts the transmission rate dynamically according to the network conditions and has the characteristics of anti-network noise.According to the request of multimedia transmission, the media congestion control is described to smooth the transmission rate of the media stream and to predict the network available bandwidth. At the same time, this paper proposes an error protection scheme with unequalized data interleaving encapsulation, which can reduce the impact of network packet loss on received video and further develop the rate-distortion theory of extensible video in Internet transmission, The optimal bit allocation scheme can be optimized between source bit stream and error control Allocate available network bandwidth resources.A large number of experimental results show that this scheme can well solve the transmission problem of extensible video on the Internet.