METHOD FOR CONVERTING SIZE OF IMAGE CODING DATA, TRANSMISSION METHOD FOR IMAGE CODING DATA AND IMAGE CODING DATA SIZE CONVERTER

摘要

PROBLEM TO BE SOLVED: To provide a coded data image size converter that is configured to simply obtain excellent image quality for the conversion of a size of image data coded by using motion compensation prediction and orthogonal transform.;SOLUTION: An image data converter 14 obtains macro block image data converted from supplied image coded data to have a prescribed image size and a motion vector converter 15 obtains a conversion motion vector with respect to the macro block image data by multiplying a prescribed conversion ratio with a motion vector with respect to the received image coding data. When the conversion ratio is smaller than 1, an integrated motion vector is obtained depending on the dispersion of a plurality of conversion motion vectors required for conversion of image data and by using the integrated motion vector and the obtained macro block image data, the image coded data subjected to size conversion is obtained.;COPYRIGHT: (C)2003,JPO