Patent ID: 6813314
Filing Date: 2004-11-02
Classification: H04N

Abstract:
An image decoding device comprising:a variable-length decoder for decoding variable-length coded data of a hierarchically coded image, said hierarchically coded image including N (2&lE;ND kinds of luminance or chrominance components An (1&lE;n&lE;N, where n is an integer); a decoding truncator for giving a decoding-stop command at any position designated by a user; a data completing unit for producing subband coefficients by inserting a specified value where no data exists; a component separating portion for separating integrated component units into respective components; a coefficient decoder for decoding the data compensated for the lack of truncated data and the variable-length coded data compensated by the data completing unit; and a subband synthesizer for reconstructing a decoded image by synthesizing subbands containing data decoded by the coefficient decoder for respective components An, wherein an image decoded with truncated data is completely displayable by using data decoded before terminating decoding of said image.