针对视频失真量的校准需求,分析了视频微分增益失真dG和微分相位失真dP的测量方法和基本原理,采用数字信号合成方法开发出标准视频失真信号序列,建立了视频失真信号源标准装置,详细阐述了其校准系统和测量不确定度,将视频信号失真量溯源至电压标准和相位标准.%In order to calibrate the quantity of video distortion, the process and philosophy of measuring distortions of differential gain Dg and differential phase AP are analyzed. A video distortion standard is developed based on a series video distortion signals which are yielded by the method of digital signal synthesis. The calibration system of the video distortion standard and its evaluation of uncertainty in measurement are described in detail. The video distortion quantity is traced to the voltage standard and phase standard.
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