×

System and method for the scaling of image streams that use motion vectors

  • US 6,075,906 A
  • Filed: 12/13/1995
  • Issued: 06/13/2000
  • Est. Priority Date: 12/13/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for scaling an image contained in an image stream, wherein the image stream comprises a motion vector used to scale the image, and a block of error terms to scale the image, comprising the steps of:

  • (1) separating a block of data corresponding to a frequency domain representation of the block of error terms from the image stream;

    (2) low pass filtering said frequency domain representation according to a scale factor to produce a reduced-size low pass filtered block;

    (3) inverse quantizing said reduced-size low pass filtered block to produce a reduced-size inverse quantized block;

    (4) selectively transforming said reduced-size inverse quantized block to a spatial domain representation according to said scale factor to produce a decimated representation of the block of error terms;

    (5) separating the motion vector from the image stream;

    (6) scaling the motion vector according to a scale factor, thereby producing a scaled motion vector;

    (7) addressing an image framestore with said scaled motion vector to obtain a block of image components corresponding to said scaled motion vector;

    (8) nonlinear filtering said block of said image components with a nonlinear filter, thereby producing a block of predicted terms; and

    (9) using one of said block of error terms, said block of predicted terms, or a combination of said block of error terms and said block of predicted terms to form a block of display pixels.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×