| 摘要 |
<p>PROBLEM TO BE SOLVED: To limit an arithmetic operation amount in the case of decoding depending on the capability of the hardware by limiting a range of an upper limit and a lower limit of filters in use in frequency synthesis depending on the performance of the hardware to execute filter processing. SOLUTION: A frequency synthesis filter bank 4 conducts filter processing within a range set by a setting means 5. A hardware performance information table 6 stores the performance of the hardware of decoders and a setting range of filters capable of processing corresponding to the hardware as a table. Based on the hardware performance information of a decoder, the means 5 refer the hardware performance information table 6 to set a range of filters capable of processing in the frequency synthesis filter bank 4. Concretely the means 6 sets an upper limit filter and a lower limit filter in the frequency synthesis filter bank 4 depending on the arithmetic parformance hardware of the decoder.</p> |
