Motion vector detection circuit enabling high-speed search of motion vector

摘要

The motion vector detection circuit including a register group (10) for storing each pixel data of a macro block which is obtained by dividing a frame picture to be coded into a plurality of macro blocks of m pixels by n lines and a register matrix (30) of m x n arrangement having two-dimensional or one-dimensional structure for storing each pixel dada of a plurality of comparison target blocks of m pixels by n lines within a search range of a predetermined size set in a frame picture immediately preceding or succeeding in time the frame picture, compares a macro block in the register group and a comparison target block in the register matrix to specify a comparison target block most similar to the macro block as a current coding target, thereby conducting motion vector search.