METHOD FOR CALCULATING PICTURE ELEMENT VALUE OF BLOCK FROM ONE OR TWO PREDICTIVE BLOCKS

摘要

PROBLEM TO BE SOLVED: To reduce the cost by reducing the quantity of a temporary storage device in the case of decoding by performing decoding by finding the picture element value of a partial picture element accuracy motion compensated block in an image from one or two reference blocks. ;SOLUTION: An input picture element 101 is interpolated by an x-interpolator 102 and supplied to a line buffer 104 or 105, an output 107 is inputted to a y-interpolator 108 together with a bypass output 106 of the x-interpolator 102 corresponding to the next reference block line, and the picture element value corresponding to the reference block line is interpolated by averaging it with a picture element value corresponding to the preceding block line. The reference block line having this calculated half picture element accuracy of a reference image 1 is written in a buffer 111. At the same time, the reference block line having the calculated half picture element accuracy of a reference image 2 is supplied to a reference block average generator 112 while using a bypass 110 and its average value output 113 is inputted to a reconstructor 116. At the same time, an IDCT 114 inputs those correspondent pixel data to the reconstructor 116, and a picture element output 117 is provided.;COPYRIGHT: (C)1997,JPO