VIDEO ENCODING METHOD AND APPARATUS, VIDEO DECODING METHOD AND APPARATUS, AND PROGRAM THEREFOR

摘要

An objective of the present invention is to minimize filter coefficient generation coding volume of an applied interpolation filter. A video coding device which uses motion correction comprises: a motion detection unit which carries out a motion search and acquires a motion vector; an interpolation filter coefficient derivation unit which, using the motion vector, computes an interpolation filter coefficient which is used in decimal precision pixel interpolation; an interpolation unit which, using the interpolation filter coefficient and the motion vector, carries out the decimal precision pixel interpolation and implements coding; a parameter selection unit which selects, from among parameters which are used in entropy coding of the interpolation filter coefficient, a parameter with which the generated coding volume of the interpolation filter coefficient is smallest among a plurality of designated parameters; and a coding processing unit which codes the selected parameter and the computed interpolation filter coefficient and outputs the coded parameter and the coded interpolation filter coefficient.