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VCR backup system

  • US 4,530,048 A
  • Filed: 06/04/1982
  • Issued: 07/16/1985
  • Est. Priority Date: 06/04/1982
  • Status: Expired due to Fees
First Claim
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1. A controller for coupling a video cassette recorder to a computer system bus, said bus adapted to transfer data on the bus to and from a computer, said controller comprising;

  • memory means for storing blocks of data, said blocks comprising a plurality of digital data bytes received from said bus for transfer to said video cassette recorder, and received from said video cassette recorder for transfer to said bus;

    control means coupled to said bus and said memory means for generating control signals to cause digital data placed on said bus to be stored in said memory means, and to cause digital data stored in said memory means to be placed on said bus;

    output means for transferring data from said memory means to said video cassette recorder; and

    input means for transferring data from said video cassette recorder to said memory means;

    wherein said output means comprises;

    (i) horizontal sync and vertical sync and blanking means coupled to said control means for generating sync and blanking signals corresponding to a predetermined video format; and

    (ii) digital to analog conversion means having said horizontal sync, vertical sync and blanking means, and said memory means connected as inputs for mixing said sync and blanking signals with data stored in said memory means to provide a mixed signal and converting the mixed signal to an output analog video signal; and

    wherein said input means comprises;

    (i) analog to digital conversion means for converting the data portions of an input analog video signal into a serial digital signal; and

    (ii) parallelizer means having said analog to digital conversion means as an input and coupled to said memory means for converting said serial digital signal into digital data bytes prior to storing in said memory means.

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