| 摘要 |
PROBLEM TO BE SOLVED: To reduce required memory capacity and to speed up arithmetic operation by successively PCM-converting the mixing data of respective channels. SOLUTION: Before PCM conversion, prescribed coefficient multiplication corresponding to a present channel while inputting at present is performed in a mixing processing part 2, and the coefficient arithmetic data DC2 are generated, and further, the mixing data RD1 corresponding to a former channel in a memory 3 are read out, and respective data DC2, RD1 of these present channel and former channel are addition processed, and the mixing data MD2 are generated. By repeating this processing, mixing processing for required channel is performed successively, and the mixing data MDi of respective channel are generated. This mixing data is PCM-converted 4 into the PCM output data, thus a mixing-processed PCM output is obtained. |
