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一、概述数字电视是用脉冲编码的方法传输电视图象的。如果广义地理解,不仅电视信号数字化传输,而且控制、监视、测试等整个电视系统均实现数字化。数字电视技术目前之所以引起人们巨大重视,至少有如下几方面的原因。 1.数字化了的电视图象信号,噪音和干扰不累积,受外界干扰影响小,发、收传输基本无失真,因此便于对图象信号进行复杂处理,比如计算机处理、记录等。因此容易构成高性能、高稳定度的电视系统,也便于实现系统的监视、测试的自动控制。
First, an overview Digital television is a method of pulse-coded transmission of television images. If broadly understood, not only is the television signal digitized for transmission, but the entire television system such as control, monitoring, testing, etc. is digitized. The reason why digital TV technology has caused great attention now is at least the following reasons. 1. Digitized television image signal, noise and interference do not accumulate, affected by external interference is small, send, receive transmission basically no distortion, so easy to complex image signal processing, such as computer processing, recording and so on. It is easy to form a high-performance, high stability of the television system, but also easy to achieve system monitoring, testing, automatic control.