| 摘要 |
PURPOSE:To prevent occurrence of the distortion at the low-level output time by adding the digitized noise signal after the multiplying process of the digitized audio signal. CONSTITUTION:The digitized audio signals CHA and CHB are supplied to multipliers 7 and 8 each. On the other hand, the setting position information of variable resistances VRA and VRB are supplied to level tables 5 and 6 after A/D conversions 3 and 4 each. Then the adjustment level value delivered from tables 5 and 6 are supplied to multipliers 7 and 8, and the result receives addition at adder 9. Here the output of adder 9 is added at adder 10 with the output of noise generator 11 which generates the digitized noise to be delivered as CHO after cutting down or rounding into the necessary bit number. In such way, the distortion caused by the bit cut- down process or the like at the low-level output time can be prevented. |
