Digital TV is an entire process of a program from filming, editing, broadcasting, transmitting to receiving, and it is achieved by using digital technology.
数字电视是指节目从摄制、编辑、播出、发射到接收的整个过程都是采用数字化技术实现的。
Digitalization and network bring the technological change of radio TV program from gathering, makeing, storing, transmitting, broadcasting, launching to receiving.
数字化、网络化带来了广播电视节目从采集、制作、存储、传送、播出、发射到接收等各个环节的技术变革。
The last, it is the replacing broadcasting. When an emergency condition happens, it can be replaced by the program that we have prepared and the continuity of TV program can be maintained.
最后是垫片播出，在直播现场有异常情况的时候，用事先准备好的内容替换录入的现场信号播出，保持播出的连续性。
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