The group delay, which characterizes the linear distortion of the system and network, is an important transmission characteristic.
群时延是系统和网络的一项重要传输特性，它表征系统和网络的线性失真。
This paper mainly discusses how to improve QoS of streaming media, decreases the transmission delay and relieves the network load by proxy caching technologies.
本文主要讨论通过代理技术改善媒体的服务质量，降低媒体的传输延迟以及减轻网络负载。
This system made remarkable progress in reducing transmission delay, controlling network transmission scope, and enhancing P2P network security and management.
该系统在降低流媒体传输延迟、控制网络传输范围、提高P2P网络安全性和可管理性等方面都有显著进步。
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