DUAL-FILTER KALMAN METHOD FOR ACOUSTIC FEEDBACK CANCELLATION IN HANDS-FREE KARAOKE ENVIRONMENTS

Original (Chinese)

A method performed by at least one processor includes receiving an output microphone signal generated by a non-directional microphone, the output signal comprising a user voice signal and mixture signal comprising an audio playback signal and a voice reference signal of the user voice, the mixture signal output from a loudspeaker; inputting the output microphone signal and the voice reference signal into a first Kalman filter to generate a first filtered signal; inputting the output signal and the audio playback signal into a second Kalman filter to generate a second filtered signal; estimating the user voice signal by subtracting the first filtered signal and the second filtered signal from the output microphone signal to generate a voice estimation signal of the user voice; and outputting, via the loudspeaker, the voice estimation signal.