| 摘要 |
A video signal encoding apparatus for enlarging a video signal by subjecting it to a coding process. The apparatus, using mxn blocks (m, n: natural number) as the unit block for coding a motion picture, performs DCT calculation and quantization, and, then, converting the block into sxt blocks (s, t: natural number), performs variable length coding. Thus, the apparatus generates compressed data of an enlarged motion picture and delivers the enlarged output. In the local decoder of the apparatus, it is switch selected by a switcher whether mxn inverse quantization coefficients, obtained by inverse quantization, are to be decoded by an s x t IDCT unit or by an m x n IDCT unit, in accordance with the accuracy in motion compensation. Further, the apparatus has a resizing unit for adjusting a motion-compensated reference picture to the picture size of an input image. The video signal encoding apparatus performs the encoding by enlarging a motion picture in a frequency domain so that the amount of data calculation in the encoding is decreased and deterioration in picture quality is suppressed. <IMAGE> |
