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Non-interlaced to interlaced format video converter

  • US 4,298,888 A
  • Filed: 06/08/1979
  • Issued: 11/03/1981
  • Est. Priority Date: 06/08/1979
  • Status: Expired due to Term
First Claim
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1. A video converter responsive to first and second frames of non-interlaced odd and even lines of input data received during first and second non-interlaced frame periods comprising:

  • first and second memory means each storing a line of input data,a source of fast clock signals and slow clock signals coupled to said first and second memory means for being alternately applied to respective first and second memory means and to respective second and first memory means, alternating after each sequential pair of line periods of said input data, andcontrol means coupled to said first and second memory means for controlling said memory means to alternately write one line of input data in one memory means at the rate of said fast clock signals while reading one line of input data from the other memory means at the rate of said slow clock signals during first and second interlaced output field periods respectively occuring during said first and second non-interlaced frame periods, said control means including means to control said first and second memory means to write and read said odd lines of said input data during said first non-interlaced frame periods and to write and read said even lines of input data during said second non-interlaced frame periods.

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