Memory device, motion vector detection device, and detection...

Details Memory device, motion vector detection device, and detection... Memory device, motion vector detection device, and detection...

2003-10-15

2009-12-01

Nguyen, Tuan T (Department: 2824)

Static information storage and retrieval

Systems using particular element

Capacitors

C365S189050, C365S189070

Reexamination Certificate

active

07626847

ABSTRACT:
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 portion20ain straight binary format. Pixel data of a second frame (a search frame) is stored in a unit B of memory cell array portion20bin 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 converter53outputs 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.

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