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Microphone array based sound field processing method and electronic device

A microphone array and sound field processing technology, applied in branch equipment, telephone communication, electrical components, etc., can solve the problems that electronic equipment cannot achieve stereo surround sound communication, and the microphone array is large in size.

Inactive Publication Date: 2015-07-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a microphone array-based sound field processing method and electronic equipment to overcome the inconvenience of placing the microphone array on the electronic equipment due to the large size of the microphone array in the prior art, resulting in the inability of the electronic equipment to Problems in Realizing Stereo Surround Sound Communication

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  • Microphone array based sound field processing method and electronic device
  • Microphone array based sound field processing method and electronic device

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Embodiment 1

[0099] Such asfigure 1 As shown, it is a sound field processing method based on a microphone array disclosed in Embodiment 1 of the present invention. The microphone array includes n omnidirectional microphones, and the value of n is a positive integer greater than or equal to 3. The method mainly includes the following step:

[0100] Step S101, dividing the microphone array according to a triangular microphone array composed of three omnidirectional microphones;

[0101] In step S101, the n omnidirectional microphones are divided into groups of 3 omnidirectional microphones, so that the omnidirectional microphones located on the mobile terminal are grouped into groups of 3 to perform corresponding processing. For example, if figure 2 The four omni-directional microphones mic1, mic2, mic3 and mic4 shown in the four side corners of the mobile terminal can be divided into four groups of triangular microphone arrays according to a group of three, wherein, mic1, mic2 and mic3 i...

Embodiment 2

[0113] Based on the microphone array-based sound field processing method disclosed in the first embodiment of the present invention, as figure 1 In step S102 shown in , the specific process of processing one of the selected one or more triangular microphone arrays is as follows: image 3 As shown, it mainly includes the following steps:

[0114] Step S201, collecting 3 microphone signals, adding window and intercepting N-point signals to perform fast Fourier transform, and obtaining the spectrum S of the k-th frequency point of the i-th frame representing the three omni-directional microphones respectively 1 (k,i), S 2 (k,i) and S 3 (k,i), i and N are any positive integers, k is a positive integer less than or equal to N;

[0115] During the execution of step S201, a triangular microphone array is used as a processing group. Collect the 3-way microphone signals of the 3 omni-directional microphones that constitute the triangular microphone array, perform windowing processi...

Embodiment 3

[0141] Based on the content disclosed in Embodiment 1 of the present invention and Embodiment 2 of the present invention, the following three omnidirectional microphones are used as a group to form different triangular microphone arrays. figure 1 Step S102 shown in , processing the triangular microphone array, and specific to the attached image 3 In step S202 shown in , for the spectrum S 1 (k,i), S 2 (k,i) and S 3 (k, i) Perform amplitude equalization processing, take an omnidirectional microphone as a fixed point, obtain the angle between the line between the omnidirectional microphone and the other two omnidirectional microphones and the X axis as C1, and the angle between the Y axis and the Y axis The included angle of the axis is C2, and the microphone equalizes the processed signal S Xj (k,i) and S Yj (k, i), and in step S203, get the microphone equalization processing signal S Xj (k,i) and S Yj (k,i) perform differential processing and low-frequency compensation ...

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Abstract

The embodiment of the invention discloses a microphone array based sound field processing method and an electronic device. The microphone array based sound field processing method comprises the steps of processing microphone arrays including n omni-directional microphones in the mode that three omni-directional microphones serving as a group form a triangular microphone array to obtain a mean value of sound field 1-order components pointed to the X-axis and Y-axis in the triangular microphone arrays, using the mean value as the sound field 1-order component of the X-axis and Y-axis in the whole microphone arrays, then utilizing the mean value of the microphone signals of the n omni-directional microphones to obtain 0-order component of a sound field, obtaining a loudspeaker stimulus signal according a decoding matrix preset according to the loudspeaker position after the components in the W-direction, X-direction and Y-direction are obtained, and utilizing the stimulus signal to reconstruct a surrounding sound field through a loudspeaker. Accordingly, arrangement of a mobile terminal is facilitated by adopting the low-cost and small sized omni-directional microphones, and the purposes of surrounding communication and sound field recording are achieved.

Description

technical field [0001] The present invention relates to the technical field of voice communication, and more specifically, relates to a microphone array-based sound field processing method and electronic equipment. Background technique [0002] In order to meet people's increasing living and working needs, a voice conferencing system capable of realizing voice conferences or multi-person voice communication is widely used. Most of the current voice conferencing systems are complex and expensive, and only large companies can afford them. For small and medium-sized enterprises or families, mobile terminals that pay a small price to realize voice conferences or multi-person voice communication are used. and other electronic devices as conference terminals. [0003] In the prior art, large-scale audio conferencing systems usually use multiple microphones to form a microphone array for multi-channel voice collection, wherein the multi-channel voice signals are mainly used for vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/12H04M1/725
Inventor 陈日林张德明
Owner HUAWEI TECH CO LTD
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