| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image compression coding apparatus capable of obtaining a coded data sequence having minimum coding distortion within a range of allowable compression ratio while minimizing a deterioration in the performance of a system and to provide a control method for the apparatus. <P>SOLUTION: A block formation unit 11 divides image data into blocks each having a predetermined size. A compression coding unit 14 compression-codes the image data on a block basis at a plurality of compression ratios. A data amount accumulation unit 15 calculates the cumulative data amounts of coded data generated at the respective compression ratios. The upper limit of the amount of total coded data is set in an upper limit setting unit 12. A control unit 17 aborts compression coding processing for the image data at a compression ratio at which the cumulative amount of data exceeds the upper limit. Upon determining that the maximum amount of total coded data predicted by a maximum total coded data amount prediction unit 16 does not exceed the upper limit, the control unit also aborts compression coding processing other than the compression coding processing exhibiting the maximum amount of coded data nearest to the upper limit. <P>COPYRIGHT: (C)2004,JPO |
