Patent ID: 6292591
Filing Date: 2001-09-18
Classification: H04N

Abstract:
An apparatus for performing a hierarchical coding of an image data to generate coded image data, comprisingmeans for forming an image data of a second hierarchy having a number of pixels which is smaller than that of an image data of a first hierarchy;means for correcting the image data of the second hierarchy and generating a corrected data;means for predicting the image data of the first hierarchy in accordance with the corrected data and generating a predicted data of the first hierarchy having a plurality of predicted pixels;means for calculating predictive error of the predicted data of the first hierarchy with respect to the image data of the first hierarchy;means for determining suitability of the corrected data in accordance with the predicted error;means for generating a difference data between the image data of the first hierarchy and the predicted data of the first hierarchy, in accordance with the determined suitability, the difference data having a plurality of difference values; andmeans for outputting the corrected data and the difference data as the coded image data.