Digital noise reduction filter generating method and device for headset

Abstract

The embodiment of the invention provides a digital noise reduction filter generating method and device for a headset. The method comprises: an amplitude response curve and a phase response curve of a first transfer function corresponding to an acoustic channel in a headset are obtained; according to the amplitude response curve and the phase response curve of the first transfer function, an amplitude response curve and a phase response curve of a second transfer function corresponding to a digital noise reduction filter in the headset are determined; on the basis of system identification, a digital noise reduction filter is generated based on the obtained amplitude response curve and phase response curve of the second transfer function. With the system identification, a corresponding expected digital noise reduction filter is generated by fitting only according to the amplitude response curve and phase response curve of the digital noise reduction filter, so that the complicated debugging process is saved and the generation efficiency of the digital noise reduction filter is improved.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method and device for generating a digital noise reduction filter of an earphone. Background technique [0002] Compared with audio, earphones have many advantages, such as good portability, high privacy, and less impact on the surrounding crowd. Among them, earphones with a noise reduction function are most popular because they can filter the noise signal picked up by the microphone in the earphone, in order to bring a better user experience to the user. [0003] Noise-canceling headphones usually use a noise-canceling filter to achieve noise reduction. However, in the prior art, the noise reduction filter is usually generated only through a complex debugging process, which leads to a cumbersome and inefficient generation process of the noise reduction filter. Contents of the invention [0004] In view of this, an embodiment of the present invention provides a me...

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Problems solved by technology

However, in the prior art, the noise reduction filter is usually generated through a complex debugging process, which leads to a cumbersome and inefficient generation process of the noise reduction filter.

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