电视信号传输和处理延时的测量方法

Measurement Method for Television Signal Transmission and Processing Delay

同一电视信号经过不同的路由会产生延迟差异,导致信号间不同步,直接影响电视播出效果。通常工作人员都是凭借目测来判定信号是否同步,这种方法由于缺乏客观数据支持,不能准确测定信号间的延迟量。本文阐述了VITC码的基本原理,并说明了利用VITC码测定信号延迟量以及调整信号使其同步的方法。

The TV signal through different routes will produce delay difference, resulting in signal is not consis-tent, direct impact on the effect of TV broadcast. Usually the staff are relying on visual signal to determine the consis-tency of this method due to the lack of objective data support, accurate determination of the amount of delay between signal scan. This paper describes the basic principle of VITC code, how to use the VITC code to determine the signal delay, and how to adjust the signal to make it consistent.