Signal processing method and signal processing device for microphone array

A microphone array and signal processing technology, applied in the field of signal processing, can solve problems such as target signal leakage

Active Publication Date: 2014-06-18
东莞市瑞勤电子有限公司
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Problems solved by technology

[0004] The present invention provides a signal processing method and device of a microphone array, which is used to solve the problems existing in the M-1 channel noise/interference reference signal caused by the ...

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  • Signal processing method and signal processing device for microphone array
  • Signal processing method and signal processing device for microphone array
  • Signal processing method and signal processing device for microphone array

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Embodiment Construction

[0097] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0098] figure 1 A schematic flow chart of a signal processing method for a microphone array provided by an embodiment of the present invention; figure 1 shown, including:

[0099] 101. Perform fixed beamforming on the M input signals collected by the microphone array to obtain a reference target signal, and perform voice activation detection on ...

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Abstract

The invention discloses a signal processing method and a signal processing device for a microphone array. The method comprises the following steps: fixed beam-forming is carried out on M input signals acquired by a microphone array to obtain reference target signals, voice activation detection is carried out on the reference target signals to obtain a voice activation detection result, target appearing probability analysis is performed on the M input signals to obtain the target appearing probability, and the M input signals are passed through a congestion matrix to obtain (M-1) reference interference signals; the filter coefficient of a filter bank for carrying out filtering is determined according to the voice activation detection result and the target appearing probability, and the (M-1) reference interference signals are filtered by using the determined filter coefficient of the filter bank to obtain filtered reference interference signals; and the filtered reference interference signals are subtracted from the reference target signals to obtain output signals of the microphone array. Damage to a target signal can be minimized.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of signal processing, and in particular, to a signal processing method and device for a microphone array. Background technique [0002] Generally, in microphone arrays, the most commonly used beamforming technology is generalized sidelobe cancellation (English: General Sidelobe Canceller, GSC for short) technology, where the generalized sidelobe cancellation algorithm adopted by generalized sidelobe cancellation technology mainly consists of three parts : fixed beamforming, congestion matrix, and multiple-input cancellation. Specifically, the M-channel input signals collected by the microphone array are used as the reference target signal for multi-input cancellation after undergoing fixed beamforming; the M-channel input signals collected by the microphone array are passed through the congestion matrix to obtain M-1 channel Noise / interference reference signal; according to the referen...

Claims

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Application Information

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IPC IPC(8): G10L21/0208
Inventor 李海婷刘媛媛艾雅·苏谟特
Owner 东莞市瑞勤电子有限公司
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