Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2007-01-10
2011-12-13
Philippe, Gims S (Department: 2485)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240150
Reexamination Certificate
active
08077779
ABSTRACT:
A method and apparatus for performing motion estimation in a digital video system is disclosed. Specifically, the present invention discloses a system that quickly calculates estimated motion vectors in a very efficient manner. In one embodiment, a first multiplicand is determined by multiplying a first display time difference between a first video picture and a second video picture by a power of two scale value. This step scales up a numerator for a ratio. Next, the system determines a scaled ratio by dividing that scaled numerator by a second first display time difference between said second video picture and a third video picture. The scaled ratio is then stored calculating motion vector estimations. By storing the scaled ratio, all the estimated motion vectors can be calculated quickly with good precision since the scaled ratio saves significant bits and reducing the scale is performed by simple shifts.
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Portions of prose
Dumitras Adriana
Haskell Barin Geoffry
Puri Atul
Singer David William
Adeli & Tollen LLP
Apple Inc.
Philippe Gims S
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