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Method and apparatus for generating progressively scanned television information

  • US 4,733,299 A
  • Filed: 03/26/1987
  • Issued: 03/22/1988
  • Est. Priority Date: 03/26/1987
  • Status: Expired due to Fees
First Claim
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1. A method for generating a progressively scanned video signal representative of images, comprising the steps of:

  • deriving an interlaced relatively low spatial frequency video signal representative of said images, at a relatively fast frame refresh rate;

    deriving a relatively high spatial frequency video signal representative of said images, at a relatively slow frame refresh rate;

    converting said interlaced relatively low spatial frequency video signal to an interlaced relatively low spatial frequency video signal having an increased number of lines, the information for each converted field coming from a field of the original interlaced relatively low spatial frequency video signal;

    converting said relatively high spatial frequency signal to a relatively high spatial frequency signal having said relatively fast frame refresh rate, each field of said converted relatively high spatial frequency signal containing information from more than a single field of the original relatively high spatial frequency video signal; and

    combining the converted relatively low spatial frequency video signal and the converted relatively high spatial frequency video signal to obtain said progressively scanned video signal.

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