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1前言据日刊“卫星与CATV”报道,到2011年7月日本的绝大部分地区(个别地区到2012年3月)已经实现了地面电视广播的数字化。广大地区观众已经进入了视听高质量、高画质的数字电视时代。因此,相对于CATV业界,对数字电视广播质量的测试方法和对电波障碍原因的探求方面也出现了与模拟电视不同的情况。究竟数字电波与模拟电波在传播上有何不同,是一个值得注意的问题。为供国内同行参考,本文将就地面数字电视广播的有关测试项目与测试方法以及注意事项作一系统介绍。
1 Introduction According to the Japanese magazine Satellite and CATV, digitization of terrestrial television broadcasting has been achieved by July 2011 in most parts of Japan (in some areas up to March 2012). The vast majority of audiences have entered the digital audio and video high-quality, high-definition era. Therefore, in contrast to the CATV industry, there has also been a departure from the analog TV in the testing of the quality of digital television broadcasting and in the search for the cause of radio disturbance. It is noteworthy that there is any difference between the propagation of digital radio waves and analog radio waves. For reference for domestic counterparts, this article will be on the terrestrial digital television broadcasting test items and test methods and precautions for a systematic introduction.