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Intelligent teletext decoder

  • US 4,333,109 A
  • Filed: 01/24/1980
  • Issued: 06/01/1982
  • Est. Priority Date: 01/24/1980
  • Status: Expired due to Term
First Claim
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1. A combination automatic equalization and decoder system for a receiver which receives both transmitted digital format data signals and a transmitted reference signal, said system equalizing said digital data signals according to the distortion exhibited by said reference signal and decoding said data signals, comprising:

  • a time base expander having an input for receiving and moving said digital format data signals at a selectable rate to an output;

    means including a microprocessor for determining the distortion exhibited by said reference signal and for operating on data signals inputted thereto to remove distortions therefrom based on said reference signal distortion;

    means coupling said time base expander output to the input of said microprocessor; and

    timing circuit means controllingly coupled to said time base expander and coupled to said microprocessor for regulating the rate at which said time base expander moves the data, said timing circuit means causing said time base expander to receive said transmitted digital format data signals at a first rate and later causing said data signals to move to said output at a slower second rate;

    said microprocessor including means decoding and outputting said data signals.

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