Method and apparatus for restraining wind noise

Abstract

The invention discloses a method for suppressing wind noise and a device thereof, which are used for accurately suppressing the wind noise, thus ensuring that a better recording effect is achieved. The method for suppressing the wind noise comprises the following steps: performing cross-correlation operation on two channels of sound signals simultaneously acquired under a same scene to obtain a normalized cross-correlation value on each frequency band; and performing gain control on the two channels of sound signals by the normalized cross-correlation value on each frequency band to suppress the wind noise in the two channels of sound signals.

Description

technical field [0001] The invention relates to the technical field of audio signal processing, in particular to a method and device for suppressing wind noise. Background technique [0002] The biggest problem encountered when recording sound outdoors is the interference of wind. Due to the interference of wind, there is a large wind noise in the recording. Especially in windy weather, the microphone (Mic) used to collect sound will record a strong wind sound, which can almost drown out the target sound you want to record. [0003] Wind noise is the noise produced by fast moving gas swirling around the Mic. Generally speaking, wind noise is mainly concentrated in the low frequency part, such as figure 1 As shown, most of the energy is usually concentrated below the frequency of 1 kilohertz (Khz), reaching the maximum at 100-200Hz. [0004] Existing sound collection equipment is easy to collect wind noise outdoors. Users generally use a windshield to cover the Mic to redu...

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Problems solved by technology

[0004] Existing sound collection equipment is easy to collect wind noise outdoors. Users generally use a windshield to cover the Mic to reduce the impact of wind noise. However, for small video cameras (DV) or recording pens and other equipment, the Mic is generally not protected by a windshield. , are more susceptible to wind noise

[0005] In addition, in the prior art, simple high-pass filtering technology can also be used to eliminate wind noise. However, this method suppresses the frequency band where the entire wind noise is located. If there is a target sound signal that needs to be recorded in this frequency band, the target sound The signal will also be canceled together, thereby reducing the recording quality

[0006] To sum up, the existing technology cannot selectively suppress wind noise, so that it cannot guarantee a better recording effect

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