基于区分服务网络的H.263+可扩展性研究

随着网络的迅速发展,Qos的应用问题日益显得突出,尤其在交互音视频流应用越来越广泛的情况下。然而就目前而言,仍然没有搞清在异构和动态改变的环境下的网络对Qos性能需求问题。为此,针对不同服务Qos架构提出了基于H.263 时域和抗误码的视频编码模式与基于区分服务QoS相结合的机制。而且上述视频的可扩展传输机制允许一种视频流可以跟别的流数据共享拥挤的数据传输通道,同时能够根据所用的信道提供较好质量的视频。

Research of H.263+Scability over DiffServ Network

Application requiring QoS, such as interactive and streaming audio/video, are becoming increasingly popular on the Internet. It is not clear yet how the emerging Internet Qos architectures will fulfill the performance requirements of such applications in a heterogeneous and dynamically changing environment. A mechanism was developed that used the temporally scalable and error resilient video coding mode of the H.263 Codec together with the Diffserv QoS architecture. The proposed scalability of transmitted video was shown to allow one to share a congested linked with other flows while maintaining video quality for properly provisioned links.