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    • 2. 发明授权
    • Image transmission system
    • 图像传输系统
    • US4953196A
    • 1990-08-28
    • US192648
    • 1988-05-11
    • Yasunori IshikawaNoboru MurayamaKoichi SuzukiKoji KuwataHiroshi ShimuraMasaaki Ishikawa
    • Yasunori IshikawaNoboru MurayamaKoichi SuzukiKoji KuwataHiroshi ShimuraMasaaki Ishikawa
    • H04N7/14
    • H04N7/148
    • A video phone comprising an input device for entering input image data to be transmitted, a circuit for digitizing the input image data into digital image data, a memory for storing the digital image data, a first circuit for producing an output image signal based on the digital image data from the memory, a display device for displaying an image of the output image signal, a second circuit for compressing the digital image data from the memory into compressed image data, a telephone part having telephone functions, a line control circuit coupled to a public analog telephone line for selectively coupling the second circuit and the telephone part to the public analog telephone line, and a control device. The control device controls at least the memory and the second circuit so that the compressed image data related to the input image data is read out from the memory and supplied simultaneously to the first and second circuits in an image transmitting mode and the compressed image data related to a voice frequency signal received through the public analog telephone line is stored in the memory and read out therefrom to be supplied to the first circuit in an image receiving mode.
    • 一种视频电话,包括用于输入要发送的输入图像数据的输入装置,用于将输入图像数据数字化为数字图像数据的电路,用于存储数字图像数据的存储器,用于产生基于该图像数据的输出图像信号的第一电路 来自存储器的数字图像数据,用于显示输出图像信号的图像的显示装置,用于将数字图像数据从存储器压缩成压缩图像数据的第二电路,具有电话功能的电话部件,耦合到 用于将第二电路和电话部件选择性地耦合到公共模拟电话线的公共模拟电话线,以及控制装置。 所述控制装置至少控制所述存储器和所述第二电路,使得与所述输入图像数据相关的压缩图像数据从所述存储器读出,并以图像发送模式同时提供给所述第一和第二电路,并且所述压缩图像数据相关 通过公共模拟电话线接收到的语音频率信号被存储在存储器中并从中读出,以便以图像接收模式提供给第一电路。