| 摘要 |
<p>PROBLEM TO BE SOLVED: To actualize a code book which is adaptive to various images and has high versatility without increasing the capacity of a memory for storing the code book. SOLUTION: The code of a solid pattern which gradually varies in luminance value in a block is generated and the code of an edge pattern which varies abruptly in luminance value is generated; and those obtained codes are stored in the memory 10. When vector quantization is actually performed, the pattern codes stored in the memory are processed to generate the code of a pattern different from them and the code is used for vector quantization to actualize adaptation to all kinds of images consisting of the solid pattern and edge pattern; and only the basic patterns are stored in the memory 10 to suppress the memory capacity small.</p> |
