Memory device and device and method for detecting motion vector

a b This invention relates to a memory device and the like that are preferably applied to a case where motion vector is detected using a block matching. Pixel data of a first frame (a reference frame) is stored in a unit A of memory cell array portion in straight binary format. Pixel data of a secon...

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Bibliographic Details
Main Authors Kondo, Tetsujiro, Niitsuma, Wataru, Kobayashi, Naoki
Format Patent
LanguageEnglish
Published 06.12.2011
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Summary:a b This invention relates to a memory device and the like that are preferably applied to a case where motion vector is detected using a block matching. Pixel data of a first frame (a reference frame) is stored in a unit A of memory cell array portion in straight binary format. Pixel data of a second frame (a search frame) is stored in a unit B of memory cell array portion in two's complement format. The units A and B have a plurality of memory cells, respectively. Word lines WL related to the pixel data of the first and second frames are simultaneously activated so that charges accumulated in capacitors of each of the memory cells can be combined along one bit line BL. A/D converter outputs a digital signal (absolute difference value) having a value that corresponds to a total amount of charges. When reading the pixel data, a subtraction and a conversion into the absolute difference value are simultaneously performed.