Howling suppression method, howling suppression device, electronic equipment and storage medium

Abstract

The invention provides a howling suppression method, a howling suppression device, electronic equipment and a storage medium, the electronic equipment comprises a microphone, a loudspeaker assembly and a simplified generalized Kalman filter, the howling suppression method comprises the steps of obtaining a transfer function, and performing correction processing on the transfer function to obtain a target transfer function; acquiring an acquisition signal of the microphone and a reference signal corresponding to the loudspeaker assembly; taking the target transfer function as an initial value of a filtering processing algorithm of the simplified generalized Kalman filter; and according to the acquisition signal and the reference signal, performing howling suppression on the acquisition signal through a filtering processing algorithm. According to the howling suppression method and device, the target transfer function serves as the initial value of the filtering processing algorithm, howling suppression is carried out through the filtering processing algorithm of the simplified generalized Kalman filter, the convergence speed in the howling suppression process can be increased, and the howling suppression effect is improved.

Description

technical field [0001] The present application belongs to the technical field of signal processing, and in particular relates to a howling suppression method, a howling suppression device, electronic equipment, and a storage medium. Background technique [0002] The development of electronic equipment has become increasingly mature, and electronic equipment includes acoustic equipment that can play sound and collect sound at the same time, such as a public address system. In the sound reinforcement system, the signal collected by the microphone is transmitted to the speaker for amplification and playback, and the audio signal played by the speaker will be picked up again by the microphone. The transmission and feedback of the audio signal between the speaker and the microphone constitute an acoustic loop. During transmission, when the volume is high, the sound feedback loop forms a positive feedback, that is, the acoustic loop gain is greater than 1. The sound is amplified ...

AI Technical Summary

Problems solved by technology

The sound is amplified step by step in the continuous feedback, resulting in a piercing howling sound, which seriously affects the user's listening experience

[0003] In the related art, for the howling suppression method in the sound reinforcement system, such as the frequency shifting and phase shifting method, in the process of sound processing, by changing the frequency or phase of the sound in real time, destroying the phase characteristics required for positive feedback to occur, or such as notch suppression For the frequency point where the howling occurs, the acoustic loop gain of the frequency point is forcibly lowered through the notch filter, but all of them change the frequency response of the sound signal or the system, causing certain distortion to the sound

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