论文部分内容阅读
有一种电视机，既能在现有制式下收看，又能在数字电视开通后收看，它就是“数模兼容电视机”。 数模兼容彩电可以收看普通模拟电视节目，但收看数字电视节目时需要外置数字电视信号解码器。这类电视机要求显像管行频较高。 根据水平扫描方式的不同，数字电视机信号可分成 ４种
There is a TV set that can be viewed under the existing system and can be viewed after the digital TV is switched on. It is a “digital-to-analog TV.” Digital-to-analog TV can watch normal analog TV programs, but watch digital TV programs need an external digital TV signal decoder. This type of television requires a higher tube frequency. According to the different horizontal scanning mode, digital TV signal can be divided into 4 kinds