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Micro-array speech denoising method for improving ACRANC and beam forming

A voice noise reduction, micro-array technology, applied in voice analysis, instruments, etc.

Active Publication Date: 2019-01-18
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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  • Micro-array speech denoising method for improving ACRANC and beam forming
  • Micro-array speech denoising method for improving ACRANC and beam forming

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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 denoising method for improving ACRANC and beam forming, and relates to the technical field of speech signal processing. The technical problem solved is howto further improve the noise suppression performance of the ACRANC method for speech reduction, which comprises the following steps: (1) improving the ACRANC method, the specific steps are as follows: (1) obtaining the distorted speech signal after the multi-channel noise reduction through the multi-channel adaptive noise cancellation; (2) taking the multi-channel distorted speech signal as the input of the restoration filter in the ACRANC system, so as to obtain the noise reduction speech; 2. Beam for, that specific steps are as follow: (1) establishing a plurality of improved ACRANC subsystems and an adaptive mode control (AMC) subsystem to obtain multi-channel noise reduction speech; (2) For multi-channel de-noising speech, better de-noising speech can be obtained by beam-forming. Theinvention can make the effect of outputting voice better and further improve the noise reduction effect of voice.

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 Applications(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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