Patent ID: 8204342
Filing Date: 2012-06-19
Classification: H04N

Abstract:
1. An image processor comprising: a frequency transform unit performing frequency transform on a first pixel block as a target block; and a pre-filter performing prefiltering with a region which overlaps with plural unit regions for processing by the frequency transform unit as a unit region for processing, before frequency transform is performed, the pre-filter performing prefiltering on a second pixel block being a predetermined number of pixels each larger horizontally and vertically than the first pixel block as a target block, said second pixel block being a plurality of second pixel blocks, the pre-filter performing prefiltering sequentially on the plurality of second pixel blocks aligned horizontally, wherein a number of pixel signals in a vertical direction within a group of pixel signals continuously inputted to the pre-filter for prefiltering is equal to a number of rows in the second pixel block.