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AssigneeApple Inc.
InventorsBarin Haskell, David Singer, Adriana Dumitras, Atul Puri
Estimating the term…
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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The bitstream of claim 44, wherein the division operation comprises performing a shifting operation of a portion of the bitstream by at least one bit.
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Dependencies are inferred from the claim text.