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随着数字化时代的到来,电视数字化已成为大势所趋,一时间媒体大炒作,不少商家也为自己的产品戴上了“数字电视”(Digital TV),“高清晰度电视”(High Definition TV)的光环,不用说广大消费者真伪难辩,生怕“一不留神”买一个价格不菲、以为是一步到位、实则名不副实的商品,就连一些广播电视业内人士都对铺天盖地的广告宣传感到莫名其妙——HDTV真的说来就来了?难道我们比美国都先行了一步?归根结柢,什么是数字电视?它和传统的电视有何区别?真正的数字电视究竟离普通百姓还有多远? 目前的电视均属传统模拟电视,存在着不能多次无损伤地复制、实际画面清晰度低、有闪烁感、亮度信号与色度信号互串、不适合进行远距离传播、占用较大的传输带宽及抗多径干扰能力差的缺点。数字电视从画面质量区分,主要包括标准
With the advent of the digital age, digital television has become a general trend. As soon as the media hype, many businesses have also put on “Digital TV” (High Definition TV) for their products. The halo, needless to say, the authenticity of the consumer is difficult to argue, for fear that “unconscious” to buy a pricey, thought is a one-step, in fact unworthy of the goods, and even some radio and television industry people are baffled by the overwhelming advertising. - Did HDTV really come? Isn’t it a step ahead of the US? After all, what is digital TV? What is the difference between it and traditional TV? How far is the digital TV really from ordinary people? The current televisions are all traditional analog televisions. There are many times that they cannot be duplicated without damage, the actual picture has low definition, there is a flickering sensation, the luminance signal and the chrominance signal are intertwined, and it is not suitable for long-distance transmission. Disadvantages of poor transmission bandwidth and resistance to multipath interference. Digital TV differentiates from picture quality and mainly includes standards