Television – Bandwidth reduction system – Data rate reduction
Patent
1996-03-08
1997-08-26
Au, Amelia
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 732
Patent
active
056615248
ABSTRACT:
Method and apparatus for calculating motion vectors. The method and apparatus calculate a motion trajectory value and initial base weights such that when x is the horizontal offset of the current macroblock from the left edge of the search window, and y is the vertical offset of the current macroblock from the top edge of the search window, and this pair of x and y values are used as the initial base weights, the motion estimation provides the best matched macroblock that has the shortest distance from the current macroblock. When the initial base weights are set to 0's, then the motion estimation will produce the first best matched macroblock encountered by the search circuitry. A scheme is also provided to set the initial base weights so that the best matched macroblock closest to the motion trajectory is selected for the motion estimation.
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Murdock John Ashley
Ngai Agnes Yee
Vail, III Everett George
Au Amelia
Goldman Richard M.
International Business Machines - Corporation
Tung Bryan S.
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