ALPS ALPINE CO., LTD. (20250014559). AUDIO SIGNAL PROCESSING DEVICE AND REMOTE CONTROL SYSTEM
AUDIO SIGNAL PROCESSING DEVICE AND REMOTE CONTROL SYSTEM
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AUDIO SIGNAL PROCESSING DEVICE AND REMOTE CONTROL SYSTEM
This abstract first appeared for US patent application 20250014559 titled 'AUDIO SIGNAL PROCESSING DEVICE AND REMOTE CONTROL SYSTEM
Original Abstract Submitted
an audio signal processing device generates an output signal by alleviating a noise component in an input signal including both a sound component to be heard and the noise component. the audio signal processing device includes: a composite sound output part to output a composite sound signal; an adaptive filter to receive as an input the composite sound signal output from the composite sound output part; and a subtraction part to output an output sound signal by subtracting an output signal of the adaptive filter from an input sound signal. the adaptive filter performs adaptation operation assuming that the output sound signal from the subtraction part is an error. the composite sound signal from the composite sound output part is formed with pure tones of multiple frequencies extracted from a frequency band that is to be cancelled and that includes a frequency band of the alleviated noise component.
