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最早开发的可视电话是模拟可视电话,其历史尽管可能追溯到本世纪20年代,但真正具有实用意义的模拟可视电话是在本世纪50年代开始研制的,采用模拟方式,静止黑白图像技术,带宽IMHZ。1964年,AT&T首次推出世界最早的可视电话(称为PicturePhone
The earliest developed videophone was an analog videophone. Its history, though possibly dating back to the 1920s, was actually developed in the 1950s with the analogy of still-black-and-white images Technology, Bandwidth IMHZ. In 1964, AT & T first introduced the world’s first videophone (called PicturePhone