...在一些应用场合,当需求精确的亮度和色度同步时,群延迟预校正(Group delay pre-correction),或称为群延迟滤波(Group delay filter)功能可胜任体验工作.
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Zero Group Delay filter 零群时延滤波器
The systems transfer function is analyzed, especially the one of the filter which is connected between VFD and the phase detector, and it should be established on the group delay concept.
根据功能，认为变频器输出电压滤波器的传递函数需要使用群时延概念，为更精确地分析这类问题提供了依据。
Group delay and dispersion characters are analyzed according to the above filter. In addition, the dynamic tunable feature is discussed.
详细分析了滤波器的群时延特性和色散特性，讨论了该滤波器的动态可调谐性质。
The OFDM system is very strict in orthogonality of sub-carries, thus it is extremely sensitive to the filter group delay.
OFDM系统对子载波间的正交性要求极其严格，因此对滤波器群延时较敏感。
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