This paper defines phase and group delay distortion of audio system based on point view of linear system analysis and the physical meanings of group delay is discussed.

本文从线性系统分析的角度定义了音响系统的相位和群延迟失真，并讨论了所定义的群延迟物理意义。

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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。

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This group-delay equalizer can follow any type of HTS microstrip filter in order to reduce phase distortion, enhance group-delay performance, and improve communication quality.

该群时延均衡器能与不同类型超导微带滤波器级联，实现相位均衡，减小相位失真，改善接收机前端信号群时延特性，提高通信质量。

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