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Microarray Speech Noise Reduction Method Based on Improved acranc and Beamforming

A voice noise reduction and micro-array technology, which is applied in voice analysis, instruments, etc., to achieve the effect of improving noise reduction effect and good voice noise reduction effect

Active Publication Date: 2022-03-18
深圳市昂思科技有限公司
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Problems solved by technology

[0004] For the deficiencies in the prior art, the technical problem solved by the present invention is how to further improve the noise suppression performance of the ACRANC method

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  • Microarray Speech Noise Reduction Method Based on Improved acranc and Beamforming
  • Microarray Speech Noise Reduction Method Based on Improved acranc and Beamforming
  • Microarray Speech Noise Reduction Method Based on Improved acranc and Beamforming

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Embodiment Construction

[0090] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited.

[0091] figure 1 A micro-array speech noise reduction method for improving ACRANC and beamforming is shown, by inputting multipath distortion speech to the recovery filter of ACRANC and combining with beamforming to carry out speech noise reduction, including the following steps:

[0092] (1) To improve the ACRANC method, the specific steps are as follows:

[0093] (1) Obtain the distorted speech signal after multi-channel noise reduction by multi-channel adaptive noise cancellation, the specific process is as follows:

[0094] Suppose the speech signal is s(k) and the noise signal is n(k), such as figure 2 As shown, they respectively reach the microphone M through multiple paths i and converted into signal s i (k) and n i (k); from the speech source and the noise source to the microphone M i The...

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Abstract

The invention discloses a micro-array speech noise reduction method with improved ACRANC and beamforming, relates to the technical field of speech signal processing, and solves the technical problem of how to further improve the noise suppression performance of ACRANC method for speech reduction, including the following steps: (a) ) to improve the ACRANC method, the specific steps are as follows: (1) Obtain the distorted speech signal after multi-channel noise reduction through multi-channel adaptive noise cancellation; (2) use the multi-channel distorted speech signal as the restoration filter in the ACRANC system Input to obtain noise-reduced speech; (2) Beamforming, the specific steps are as follows: (1) Establish multiple improved ACRANC subsystems and adaptive mode control AMC subsystems to obtain multi-channel noise-reduced speech; (2) Multi-channel Noise-cancelled voice through beamforming to get better noise-cancelled voice. The invention can make the effect of outputting voice better, and further improve the effect of voice noise reduction.

Description

technical field [0001] The invention relates to the technical field of speech signal processing, in particular to a microarray speech noise reduction method with improved ACRANC and beamforming. Background technique [0002] Speech noise reduction technology can effectively improve the voice quality and the recognition rate of the speech recognition system, and the microarray speech noise reduction technology is an effective speech noise reduction method. The micro-microphone array refers to an array with a very small array aperture. The array aperture is usually within 5 cm, and the number of array elements is small. Since microarrays are easier to embed into various application devices, they have a wide range of application values. The generalized sidelobe cancellation (Generalized Sidelobe Cancellation) method (abbreviated as VAD-GSC) based on VAD (Voice Activity Detector) is a commonly used and effective micro-microphone array voice noise reduction method. Array Crosst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0216
CPCG10L21/0216G10L2021/02166
Inventor 曾庆宁罗瀛方韶劻林凤梅谢先明龙超
Owner 深圳市昂思科技有限公司
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