| abstract |
(57) [Summary] [PROBLEMS] To enable reproduction of only a part of a moving image or a continuously shot still image without requiring hardware such as a high-speed CPU, and to enable reproduction and display of an enlarged image. When only a specified area is expanded by a user's instruction, a system inverse quantization unit expands only an area specified by an area instruction unit at the time of encoding, and for a non-decoding area, for example, In the inverse discrete wavelet transform unit 9, by substituting a white pixel or a black pixel into an image signal for an area not to be decoded, only a star-shaped area part designated at the time of encoding is decoded, and other parts are decoded. The image is displayed as white or black, or an invalid value is substituted as an image signal into an area not to be decoded, and a portion including the specified area is cut out and displayed. |