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Data communication apparatus

  • US 5,524,194 A
  • Filed: 02/10/1995
  • Issued: 06/04/1996
  • Est. Priority Date: 09/17/1990
  • Status: Expired due to Term
First Claim
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1. A user-interactive system for performing communication between a first user'"'"'s data communication apparatus and a second user'"'"'s communication apparatus connected thereto via a communication line, said system comprising:

  • reception means for receiving images sent from the second user'"'"'s communication apparatus via the communication line;

    error detection means for detecting synchronization of the received images and for detecting generation of an error;

    image detection means for detecting whether or not said reception means has received the image;

    an image memory in which a first control image for giving notice of an error generation and a second control image for giving notice that the image is not received have been previously stored;

    display means for displaying an image; and

    supply means for selectively supplying one of the images received by said reception means and the first and second control images stored in said image memory to said display means,wherein said supply means selectively supplies the one received image and the first and second control images according to detection results output from said error detection means and said image detection means, such that said supply means supplies the one received image to said display means when said error detection means does not detect an error generation and supplies the first control image to said display means when said error detection means detects an error generation, and supplies the second control image to said display means when said image detection means detects that the image is not received.

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