论文部分内容阅读
1.前言在1977年卫星广播世界无线电行政大会(WARC—BS—77)卫星电视广播规划中,为了做到和地面电视广播兼容,规定用副载波方式传送电视伴音以简化地面接收机。在高质量卫星地面接收机中,信号解调以后,为了把图象
1. Introduction In order to be compatible with terrestrial television broadcasting in the satellite television broadcasting program of the 1977 World Radiocommunication Conference on Satellite Radio (WARC-BS-77), provision is made for transmitting television sound in subcarriers to simplify terrestrial receivers. In high quality satellite terrestrial receivers, the signal is demodulated in order to put the image on