什么是数字电视 数字电视和模拟电视的区别在于电视信号是以模拟波形还是数字记录方式编排和传送的,其中,发送的射频信号是否是数字形式最为重要。图像信号和声音信号的数字化处理早已在采用,它并不是数字电视的本质所在。 图1是电视广播发送系统的三个主要环节,不管是模拟电视还是数字电视都离不开这三部分。 What is DTV? The difference between DTV and analog TV is whether the television signal is arranged and transmitted in analogue or digital form. The most important of these is whether the transmitted RF signal is in digital form. The digitalization of the image and audio signals is already in use and it is not the essence of digital television. Figure 1 shows the three main components of a system for sending a broadcast television. It does not matter whether it is an analog TV or a digital TV.