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数字电视是相对于模拟电视而言的。现在的电视系统就其本质来说,在电视信号的产生、处理、记录、传送和接收的过程中,使用的都是模拟信号,即在时间和幅度上连续的信号。在电视信号处理的若干环节上,虽然也用到许多数字技术,但被处理信号的记录,特别是传送和接收,仍然是模拟的。所谓数字电视信号是指在电视信号产生后的处理,记录、传送和接收的过程中,使用的都是数字信号,即在时间上和幅
Digital TV is relative to analog TV. The present television system, by its very nature, uses analog signals, ie, signals that are continuous in time and amplitude, in the generation, processing, recording, transmission and reception of television signals. In several aspects of television signal processing, although many digital techniques are also used, the recording of processed signals, in particular transmission and reception, is still analog. The so-called digital television signal refers to the processing, recording, transmitting and receiving after the television signal is generated, using digital signals, that is, in time and amplitude