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电话的发明使人们足不出户就可以听到远方亲人的声音,它极大程度地缩短了人与人、市与市之间的距离。这项技术带给人类的不仅是交流的便利,而且是一次通讯革命。然而方便之余,人们仍多少有一丝遗憾,那就是:“只闻其声不见其人”。可视电话的出现将从此使人类与远在千里的亲友进行面对面讲话的愿望成为现实。 1992年美国AT&T公司率先推出了世界第一台可视电话,随后英、法、日也推出了类似的产品。由于当时技术条件所限,图像传递速度每秒还不到一帧,画面动作象木偶一样不能连续,国际上各公司产品也不能互联,限制了可视电话的发展。1996年国际通讯联盟
The invention of the telephone enables people to hear the voices of distant relatives without leaving home. It greatly shortens the distance between people, the city and the city. This technology brings to human beings not only the convenience of communication but also a communication revolution. However, more than convenience, people still have a trace of regret, that is: “only heard the sound of his own.” The advent of videophones has since made it a reality that human beings and their relatives and friends, who are thousands of miles away, can speak face-to-face. In 1992 the United States AT & T pioneered the world’s first video phone, followed by Britain, France, Japan also introduced a similar product. Due to the limited technical conditions at that time, the image transmission speed was less than one frame per second. The screen motion could not be continuous like a puppet. The products of various companies in the world could not be interconnected, which restricted the development of videophone. International Communications Union 1996