微分相位测量普遍存在的问题

Common Problem of Differential Phase Measurement

正确测量微分相位失真对视频信号的产生、编辑和传输都非常重要。介绍了微分相位的一般测量方法,指出微分相位测量中普遍存在的问题,通过分析提出了使用仪器进行微分相位测量的正确方法。利用该方法,不仅能够给出对应于彩色图像质量的正确微分相位失真值,而且通过测量过程还能够了解被测网络相移特性的真实质量情况。

The correct measurement of differential phase distortion generation, editing and transmission of video signals are very important. The general differential phase measurement methods are introduced. The common problems of differential phase measurement are pointed out. Then, the correct way of using the instrument for differential phase measurement is proposed. Using this method, a correct differential phase distortion value can be given corresponding to the color image quality, and the process is also can be understand by measuring the true quality of the measured network phase shift.