×

Still block detection in a video sequence

  • US 9,832,484 B2
  • Filed: 05/20/2015
  • Issued: 11/28/2017
  • Est. Priority Date: 05/20/2015
  • Status: Active Grant
First Claim
Patent Images

1. A method of operating a video display system, the method comprising:

  • receiving a sequence of image frames, including at least a first frame and a second frame;

    dividing the first frame into a first set of blocks;

    dividing the second frame into a second set of blocks, wherein each block in the second frame is spatially collocated with a respective block in the first frame;

    calculating a respective center of mass of each block in the first and second frames;

    detecting motion between the first frame and the second frame by comparing the respective center of mass of each block in the second frame to the respective center of mass of its spatially collocated block in the first frame, in which the block in the second frame is detected as being;

    a still block when its respective center of mass is the same as the respective center of mass of its spatially collocated block in the first frame; and

    a non-still block when its respective center of mass is different from the respective center of mass of its spatially collocated block in the first frame; and

    reducing power to a circuit module in the video display system in response to detecting at least one still block in the second frame.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×