超高清数字视频基带信号抖动测量技术研究  

A Jitter Measurement Technique for Digital Ultra-High-Definition-Video Signals

作　　者：李抵非[1] 陈赫[1] 王立峰[1] 高鸿莹 吴昭春[1] LI Difei;CHEN He;WANG Lifeng;GAO Hongying;WU Zhaochun(National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国计量科学研究院,北京100029

出　　处：《计量科学与技术》2021年第6期3-8,共6页Metrology Science and Technology

基　　金：国家质量基础的共性技术研究与应用项目(2018YFF0212103)。

摘　　要：针对数字超高清视频基带信号的抖动参数测量开展研究,设计了高速串行数字接口(SDI)信号的测量方法,采用改进后的双狄拉克模型来测量信号中的抖动,并解调SDI中的时钟信号作为测量时间基准。该方法可以准确地分析SDI信号中不同的抖动分量,采用时域测量方法,将信号抖动测量溯源到时域脉冲波形参数。通过实验验证了该方法的可行性,测量结果表明,该方法比直接频谱测量法具有更高的测量精度。In this paper,jitter-parameter measurement of digital Ultra-High-Definition-Video(UHDV)baseband signals is studied.We design a high-speed Serial-Digital-Interface(SDI)signal measurement method which adopts an improved dual-Dirac model to measure the jitter in the signal.Also we have designed a relevant hardware circuit to demodulate the clock signal in the SDI,which is then used as the measurement time reference.The method can accurately analyze different jitter components in SDI signals and make signal jitter measurement traceable to time-domain pulse waveform parameters by using the time-domain measurement method.The feasibility of this method was verified by experiments.The measurement results showed that this method has higher measurement accuracy than a direct spectrum measurement method.

关 键 词：超高清视频 抖动测量 高速串行信号 波形计量 

分 类 号：TN919.8[电子电信—通信与信息系统]