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Frame rate conversion system in television signal

  • US 4,672,442 A
  • Filed: 07/15/1985
  • Issued: 06/09/1987
  • Est. Priority Date: 07/17/1984
  • Status: Expired due to Term
First Claim
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1. A video frame rate conversion method for converting a first video signal having a first frame rate into a second video signal having a second frame rate differeing from said first frame rate, comprising:

  • storing a first frame of said first video signal;

    storing a second frame of said first video signal next succeeding first frame;

    selecting a first picture block cell from said first frame of said first video signal, and a second picture block cell from said second frame of said first video signal, said second picture block cell corresponding to said first picture block cell and being moved in position relative said first picture block cell, by selecting video signals corresponding to said first picture block cell and said second picture block cell respectively from four adjacent lattice point cells enclosing each of said first and second picture block cells and calculating said first and second picture block cells respectively from said four adjacent lattice point cells enclosing each of said respective first and second picture block cells;

    generating an interpolated frame temporally between said first and second frame of said first video signal, by performing an interpolation operation between said first picture block cell and said second picture block cell;

    storing said interpolated frame in a frame memory; and

    outputting said interpolated frame from said frame memory at said second frame rate as said second video signal.

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