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在黑白电视时期,电视接线非常简单,只要在屋顶上装一条天线,拉一条单线插入电视机后面的一个接口里就可以坐下来安享7个频道的节目(指美国情况——译者注)。在今天,情况大大复杂化了,电视进入数字化时代,卫星频道与有线频道数以百计,绝大部分城市高清电视(HDTV)和模拟电视同时播送。数字技术产生的变化不仅在电视屏幕上可以看出,同时也出现在电视机的后背板上,新款的HDTV具有许多视频输入选择,包括老式天线接口、电脑输入以及可以防止复制电影、电视演出及其他内容的数字接口等等。
During black and white television, the television was very simple, just sit on the roof of an antenna, pull a single wire into an interface on the back of the TV and sit down to enjoy the seven-channel programming. Today, the situation is greatly complicated. Television has entered the digital age. There are hundreds of satellite channels and cable channels, and most of the cities simultaneously broadcast HDTV and analogue television. The changes in digital technology are not only visible on television screens, but also on the rear panel of the television. The new HDTV has many video input options, including a legacy antenna interface, computer input, and the ability to prevent cinematic copying, television shows And other content of the digital interface and so on.