| 摘要 |
PROBLEM TO BE SOLVED: To generate code data through highly accurate fixed length processing by coding object image data with a compression degree corresponding to an object code volume and using a generated correction characteristic line so as to obtain a correction compression degree. SOLUTION: The system is provided with an image memory 1, a discrete cosine transformation(DCT) section 2, a DCT coefficient memory 3, a quantization section 4, a coding section 5, a counter 6, a scale factor decision section 7 and a controller 8. Then in order to generate code data of an object code volume, a compression degree corresponding to an object code volume on a 1st characteristic line and a 1st code volume is obtained by coding object image data at the compression degree. Then based on the code volume, a correction characteristic line is generated and a correction compression degree corresponding to the object code volume is obtained on the correction characteristic line. The correction compression degree is estimated as the compression degree to generate code data of the object code volume and object image data are coded by the correction compression degree. |
