Patent ID: 7760807
Filing Date: 2010-07-20
Classification: H04N

Abstract:
1. A system for motion estimation using chrominance information, which is based on each block of a current frame to find a corresponding block from a previous frame and accordingly determines a motion vector, the system comprising: a luminance difference computation unit, which computes luminance differences between a luminance of a target block in the current frame and luminance of candidate blocks in the previous frame; a first chrominance difference computation unit, which computes first chrominance differences between a first chrominance of the target block in the current frame and first chrominance of the candidate blocks in the previous frame; a second chrominance difference computation unit, which computes second chrominance differences between a second chrominance of the target block in the current frame and second chrominance of the candidate blocks in the previous frame; a chrominance distortion detection unit, which is based on the first chrominance differences and the second chrominance differences to adjust the luminance differences and to accordingly output adjusted luminance differences; and a difference comparison unit, which finds a minimum one among the adjusted luminance differences and accordingly determines the motion vector.