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Microphone-array speech-beam forming method as well as speech-signal processing device and system

A voice signal processing and microphone array technology, which is applied in voice analysis, transducer circuits, sound-generating devices, etc., can solve problems such as strong directional interference, difficult indoor reverberation, and multi-path reflection, so as to reduce noise and other problems. Interference, improve positioning accuracy and directivity, and enhance the effect of long-distance sound pickup ability

Inactive Publication Date: 2012-01-18
深圳市顺畅声学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, these received signals and noise often overlap each other in time and spectrum, especially in indoor speech conditions, the reflection signals of walls and other objects are actually copies of the original signal, and it is extremely difficult to remove these multipath reflections. difficulty
Therefore, it is quite difficult to enhance the sound of interest and effectively suppress background noise, strong directional interference (such as uninteresting sound, etc.) and room reverberation using a traditional single microphone and its corresponding digital signal processing method

Method used

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  • Microphone-array speech-beam forming method as well as speech-signal processing device and system
  • Microphone-array speech-beam forming method as well as speech-signal processing device and system
  • Microphone-array speech-beam forming method as well as speech-signal processing device and system

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Embodiment Construction

[0013] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0014] Please refer to figure 1 , the microphone array in the embodiment of the present invention is composed of microphones 0~4, and the speech signals obtained by each microphone are sequentially processed through digital signal conversion, frequency domain signal acquisition and delay acquisition, and corresponding delay compensation 0~4 is performed respectively, and then passed through Weighted superposition, and finally the speech beam with speech signal enhancement is obtained. Specifically, the microphone array speech beamforming method of the embodiment of the present invention includes:

[0015] Digital signal conversion step: converting the microphone signal obtained by the microphone array composed of at least two microphones into a digital signal;

[0016] Frequency-domain signal acquisition step: acquiring the frequency-domain signal of...

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Abstract

The embodiment of the invention discloses a microphone-array speech-beam forming method, which comprises a digital-signal converting step, a frequency-region signal-obtaining step, a time-delay obtaining step, a time-delay compensating step and a weighted stacking step, wherein time-delay estimation based on phase conversion is adopted particularly in the time-delay obtaining step, thereby a beam-forming signal pointed to a target sound-source spatial position after enhancement processing is obtained. Compared with the prior art, the positioning precision and the directivity of a three-dimensional space are enhanced, the long-distance sound-picking capability in a complicated acoustics environment is greatly enhanced, high-quality voice signals are obtained, and noise and other interferences are reduced. The embodiment of the invention also discloses a speech-signal processing device and a system.

Description

technical field [0001] The present invention relates to the acquisition of indoor / outdoor audio signals in complex acoustic environments, such as the long-distance sound pickup digital microphone array (digital microphone array, DMA) technology under the conditions such as large noise pollution or serious room reverberation (room reverberation), especially relates to a A microphone array voice beamforming method, voice signal processing device and system. Background technique [0002] Since the target sound source may be affected by factors such as background noise (cars, people talking, explosions, etc.) and multipath reflection and reverberation, the signal-to-noise ratio of the signal received by a single microphone is reduced, which seriously deteriorates the quality of voice communication. making it difficult to hear the voice of the speaker of interest. In terms of noise processing, traditional single isolated microphones generally use techniques such as spectral subt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10K11/34H04R3/00G10L21/0208G10L21/045
Inventor 钟雄虎舒畅
Owner 深圳市顺畅声学科技有限公司
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