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Telecommunications system for the hearing impaired utilizing Baudot-ASCII code selection

  • US 3,896,267 A
  • Filed: 09/21/1973
  • Issued: 07/22/1975
  • Est. Priority Date: 09/21/1973
  • Status: Expired due to Term
First Claim
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1. In a telecommunication data terminal for selectively transmitting data in one of at least first and second codes, the terminal comprising:

  • code select switch means;

    means for entering data into the terminal;

    means connected to the data entry means for encoding the entered data in accordance with the selected code;

    interface means connected between the data entering means and the encoding means, said interface means responsive to the code select switch means, for interposing a special indication when the first code is selected and there is a change from alpha to numeric characters and vice versa;

    clock means connected at the input thereof to the switch means for generating timing signals which control the data rate from the encoding means in accordance with the selected code;

    transducer means connected to the output of the encoding means for coupling encoded data to a telephone for transmission over telephone lines to another station at a data rate determined by the clock means;

    means for visually displaying the entered data at the terminal as it is transmitted to another station, the displaying means including;

    means connected to the output of the encoding means and the code select switch means for converting encoded data in the first code format to the second code format for internal processing;

    memory means connected to the converting means for storing the data therefrom;

    means connected to the output of the memory means for generating video data therefrom corresponding to the entered data;

    means for generating video display synchronizing signals;

    signal mixing means for mixing the video data with video synchronizing signals and producing a composite video signal; and

    output means whereat the composite signal is present for connection to a video display which displays the entered data.

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