Rate-distortion optimized streaming from the edge of the network

Jacob Chakareski, P. Chou, B. Girod
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引用次数: 44

Abstract

This paper addresses the problem of streaming packetized media over a lossy packet network through an intermediate proxy server to a client, in a rate-distortion optimized way. The proxy, located at the junction of the backbone network and the last hop to the client, coordinates the communication between the media server and the client using hybrid receiver/sender-driven streaming in a rate-distortion optimization framework. The framework enables the proxy to determine at every instant which packets, if any, it should either request from the media server or retransmit directly to the client, in order to meet a constraint on the average transmission rate while minimizing the average end-to-end distortion. Performance gains of up to 1.5 dB and up to 4 dB are observed over rate-distortion optimized sender-driven systems for the case when the last hop is wireline and wireless, respectively.
速率失真优化流从网络的边缘
本文以一种率失真优化的方式,解决了在有损包网络上通过中间代理服务器向客户端传输分组媒体的问题。代理位于骨干网和客户端最后一跳的交界处,在速率失真优化框架中使用混合接收/发送驱动的流来协调媒体服务器和客户端之间的通信。该框架使代理能够在每个瞬间确定哪些数据包(如果有的话)应该从媒体服务器请求或直接重传到客户端,以便在最小化平均端到端失真的同时满足对平均传输速率的约束。在最后一跳为有线和无线的情况下,通过优化速率失真发送器驱动系统,分别可获得高达1.5 dB和高达4 dB的性能增益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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