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Content based video compression system

  • US 5,854,856 A
  • Filed: 07/19/1995
  • Issued: 12/29/1998
  • Est. Priority Date: 07/19/1995
  • Status: Expired due to Term
First Claim
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1. A method of compressing a video segment comprised of a series of frames, comprising the steps of:

  • preprocessing a frame to obtain figure motion data for each moving figure, said preprocessing comprising the steps of;

    comparing said frame to another frame;

    estimating image velocity at certain locations;

    estimating background velocity of said frame;

    adjusting said image velocity to compensate for said background velocity;

    segmenting each said moving figure; and

    estimating figure velocity of each segmented moving figure of said frame;

    tessellating any moving figures to produce an instance of a template for each moving figure and an instance of a background template;

    storing said figure motion data in a manner so as to associate said figure motion data with said frame;

    storing frame information representative of the size and position of said frame with respect to a background world image;

    comparing each of said instances of a template to a world image for that template to cut material common to both from one and to add the remaining material to form a new world image;

    repeating each step until all the frames in the series are processed; and

    outputting each world image, said figure motion data, and said frame information.

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