| 摘要 |
Provided is a surround component generation device capable of generating surround components for multichannel reproduction based on two-channel audio signals with less arithmetic operation. The device includes: multipliers (101, 102) for changing amplitudes of audio input signals; subtractors for subtracting outputs of the multipliers (101, 102) from the input signals; coefficient updaters (103, 104) for updating coefficients of the multipliers (101, 102); subtractors (107, 108, 109, 110) for generating surround components based on the input and output signals of the multipliers (101, 102); output switches (111, 112) for switching and outputting the output signals of the subtractors (107, 108, 109, 110); and output switching controllers (113, 114) for controlling the output switches (111, 112). Each of the coefficient updaters updates the coefficient based on the output of the subtractor, and each of the output switching controllers switches the output switch based on the coefficient updated by the coefficient updater. |
