Appeal No. 1997-0201
Application No. 08/140,318
detect a motion vector based on the evaluation value of said
difference.
7. A processing circuit for performing motion detection by
dividing picture-based image signals into blocks, each block
comprising a pre-set number of pixels and for searching an
entire picture utilizing a block-matching method, wherein the
block size of a reference block of the current picture
comprises M x N pixels and the number of candidate blocks of a
previous picture being M x N, said circuit comprising:
a plurality of processing units equal to the product of M
x N, each of said processing units being adapted for
calculating an evaluation value based on a difference between
a pixel value of said reference block and a pixel value of a
one of said candidate blocks under consideration, and for
summing said evaluation values, said processing units being
arrayed and interconnected in an M x N matrix configuration,
the pixel values of said reference block and the pixel values
of the candidate block under consideration being input to said
processing units in a pre-set sequence to thereby detect a
motion vector;
wherein each picture is a frame and wherein each
processing unit comprises:
a register for sequentially storing the pixel values of a
current frame,
a multiplexer for multiplexing pixel values of an odd
column of a previous frame which is under consideration with
the pixel values of an even column of the previous frame which
is under consideration,
a processor for calculating an absolute value of the
difference between an output of said register and an output of
said multiplexer, and
an accumulator for accumulating outputs of said processor
for summing the absolute values of the differences.
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