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Digital television receiver with memory refreshing circuitry

  • US 4,727,426 A
  • Filed: 10/04/1985
  • Issued: 02/23/1988
  • Est. Priority Date: 10/17/1984
  • Status: Expired due to Term
First Claim
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1. Apparatus for use with a television receiver in which a television signaI is processed in digital form, the apparatus comprising:

  • processing control means for controlling the digital processing of the television signal;

    memory means having a number of digital data storage locations connected to said processing control means for storing digital data used thereby in controlling said processing;

    mirocomputer means connected to said memory means for sequentially refreshing data stored at each location therein on a basis of one location at a time at regular periodic intervals;

    means connected to said microcomputer means for selecting said regular periodic intervals to be vertical blanking periods of the televsion signal; and

    keyboard means operably connected to said processing cotnrol means and adapted to be actuated by a user of the television receiver for inputting data to control operation of the television receiver, said microcomputer means being further connected to said keyboard means for controlling said memory means for writing input data into said memory means upon actuation of said keyboard means.

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