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我们在设计或查阅电视线路时,往往容易将电视信号极性搞混。为了帮助大家少走弯路本文将对电视信号极性作一些剖析,供参考。 1. 电视信号简介电视信号(不考虑伴音)是由图象信号、复合消隐信号、复合同步信号及色同步信号构成的。这四种信号合在一起称为全电视信号。但在黑白全电视信号中不包括色同步信号。全电视信号的幅度以同步信号电平作100％,黑电平和消隐电平为75％,白电平为12.5％,图象信号介于黑白电平之间。图1是一行三白两黑全电视信号。为作图方便起见,本文以下举例
When designing or looking at TV lines, we tend to confuse the polarity of the television signal. In order to help you avoid detours This article will make some analysis of the polarity of the television signal for reference. 1. Introduction to television signals Television signals (not considered sound) is composed of image signals, composite blanking signals, composite synchronization signals and color burst signals. Together these four signals are called all-television signals. However, in black and white TV signal does not include the color burst signal. The full TV signal amplitude is 100% for the sync signal level, 75% for the black and blanking levels and 12.5% for the white level, with the image signal between black and white levels. Figure 1 is a line of three white and two black full TV signal. For the convenience of drawing, this article uses the following example