System and method of finding motion vectors in MPEG-2 video...

Details System and method of finding motion vectors in MPEG-2 video... System and method of finding motion vectors in MPEG-2 video...

2005-11-22

2005-11-22

Philippe, Gims (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S213000

Reexamination Certificate

active

06968009

ABSTRACT:
A method of finding motion vectors for use in MPEG video encoding comprises generating, from a full frame, (i) a first scaled frame having a reduced number of pixels as compared to the full frame and (ii) a second scaled frame having a reduced number of pixels as compared to the first scaled frame. A first, full, best match search is of the second scaled frame is performed to identify rough motion vectors. A second best match search is performed using the rough motion vectors identified by the first search within a limited range in the X and Y directions for each macroblock of the first scaled frame to identify intermediate motion vectors. Finally, a third best match search is performed using the intermediate motion vectors identified by the second search, within a limited range in the X and Y directions for each macroblock of the full frame to identify final motion vectors.

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