Audio signal noise reduction method, audio signal processing device and electronic equipment

Abstract

The invention relates to the technical field of audio signal processing, and discloses an audio signal noise reduction method, an audio signal processing device and electronic equipment. The method comprises the following steps: if a current noise reduction coefficient needs to be updated into a new noise reduction coefficient, the digital signal processor calculates the new noise reduction coefficient and writes the new noise reduction coefficient into an idle storage module in at least two storage modules, and sends an updating request for updating the noise reduction coefficient to an active noise reduction module, the position information carried by the update request is used for indicating the position where the new noise reduction coefficient is written into the storage module; and the active noise reduction module reads a new noise reduction coefficient based on the position information carried by the update request, and performs noise reduction processing according to the new noise reduction coefficient after the current noise reduction processing period is ended. According to the scheme, coefficient updating is carried out under the condition that active noise reduction is not closed, the integrity of coefficient updating is improved, noise caused by uneven coefficient updating is avoided, the better active noise reduction effect is achieved, and the auditory feeling of a user is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of audio signal processing, and in particular, to an audio signal noise reduction method, an audio signal processing device, and electronic equipment. Background technique [0002] Active Noise Cancellation (ANC) has been widely used in electronic products such as wired headphones, True Wireless Stereo (TWS) headphones, and even car audio systems, bringing consumers more and more extreme acoustics experience. Its basic working principle is: the noise reduction microphone acquires the noise of the external environment and inputs it to the noise reduction circuit as a reference signal; the noise reduction circuit generates signals with equal frequency and amplitude and opposite phase to cancel the noise. Compared with analog ANC, digital ANC has the advantages of strong stability, good flexibility, and higher yield rate. Therefore, using digital chips to realize ANC noise reduction processing is t...

AI Technical Summary

Problems solved by technology

However, when there are many coefficients that need to be updated, or when the system bus is busy, the update time may be longer, and restarting the ANC will affect the user experience

Another method is to dynamically update the coefficients without turning off the ANC, but this method is prone to mixed use of the coefficients before and after the update at the same time, which will cause noise and affect the user's hearing experience

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