| 摘要 |
It is the objective of the present invention for a device for correcting and compensating for distorted sound to improve sound quality by reducing distortion even when an output sound is distorted in a speaker or the like. Said device is provided with a first filter unit, a signal level detection unit, a first lookup table unit, a second lookup table unit, a correction band extraction signal generation unit, a correction signal generation unit, a first edge detection unit (54), a filter unit (57, 58), a first amplification unit (59), a second filter unit (62), and an output signal generation unit. The first filter unit generates a correction band signal on the basis of the frequency at which the distortion occurs in the speaker. The signal level detection unit detects the signal level of the correction band signal. The first lookup table unit determines a control signal. The second lookup table unit determines the correction amount. The correction band extraction signal generation unit generates a correction band extraction signal by multiplying the correction band signal by the control signal. The correction signal generation unit generates a correction signal by subtracting the correction band extraction signal from an input signal. The first edge detection unit (54) generates a harmonic sound signal from the correction band extraction signal. The filter unit (57, 58) controls the high-pass and low-pass signal levels of the harmonic sound signal. The first amplification unit (59) amplifies the harmonic sound signal. The second filter unit (62) generates a compensation signal from the harmonic sound signal. The output signal generation unit generates an output signal by adding the compensation signal to the correction signal. |
