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Video telephone

  • US 5,400,068 A
  • Filed: 07/24/1992
  • Issued: 03/21/1995
  • Est. Priority Date: 07/24/1991
  • Status: Expired due to Fees
First Claim
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1. A video telephone for exchanging image data, voice data and user data through a digital communication channel or channels in real time, comprising;

  • (a) a communication controller for controlling communication of image data, voice data and user data, which are multiplexed, through the digital communication channel or channels;

    (b) a multiplexor-separator for separating multiplexed image data, voice data and user data received by said communication controller, and for multiplexing image data, voice data and user data into multiplexed data which are to be transmitted;

    (c) an image CODEC for decoding image data, which are separated by said multiplexor-separator, into an image signal and for coding an input image signal into image data and transmitting image data to said multiplexor-separator;

    (d) a camera for outputting an image signal, which is taken by said camera, to said image CODEC as an image signal to be coded;

    (e) a display for displaying an image represented by an image signal which is decoded by said image CODEC;

    (f) a voice communication controller for decoding voice data, which are separated by said multiplexor-separator, into a voice signal and for coding an input voice signal into voice data and transmitting voice data to said multiplexor-separator;

    (g) a handset having a first speaker for outputting a voice represented by a voice signal which is decoded by said voice communication controller, and a first microphone for transmitting the voice signal, which is produced by said first microphone, to said voice communication controller as the voice signal to be coded;

    (h) a power supply unit for receiving a supply of power from an external source and distributing the power to each electrical part of the video telephone;

    (i) a key input unit having a plurality of keys;

    (j) an image input terminal;

    (k) an image output terminal for outputting the image signal decoded by said image CODEC;

    (l) a video switch for outputting the image signal from said camera or the input image signal from said image input terminal to said image CODEC as the image signal to be coded;

    (m) a voice input terminal;

    (n) a second speaker;

    (o) a second microphone;

    (p) a voice output terminal;

    (q) an audio switch for outputting an input signal from said voice input terminal or the voice signal taken by the first microphone or the voice signal taken by the second microphone to said voice communication controller as the voice signal to be coded, and for outputting the voice signal, which is decoded by said voice communication controller, to the first speaker or the second speaker or said voice output terminal;

    (r) a serial data interface;

    (s) a facsimile terminal;

    (t) a camera control terminal; and

    (u) a control unit, in response to the key input from said key input unit, for controlling said video switch and said audio switch and controlling of switching over inputting and outputting of the user data between said multiplexor-separator and each of said serial data interface, said facsimile terminal and said camera control terminal.

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