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Standards conversion of digital video signals

  • US 5,303,045 A
  • Filed: 08/24/1992
  • Issued: 04/12/1994
  • Est. Priority Date: 08/27/1991
  • Status: Expired due to Term
First Claim
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1. A method of converting an input digital video signal to an output digital video signal wherein the input and output signals have different frame rates and different numbers of pixel lines per frame, the method comprising the steps of:

  • forming a first series of progressive scan format frames from the input signal;

    temporally interpolating selected ones of said progressive scan format frames using temporally offset motion vectors and pixel weights to provide the difference in frame rate, said pixel weights for each of said progressive scan format frames being different than the temporal offsets for said each of said progressive scan format frames, thereby forming a second series of frames; and

    performing vertical spatial interpolation so as to provide the difference in the number of pixel lines per frame.

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