Acoustic source spatial positioning method for distributed asynchronous acoustic sensor

An acoustic sensor and spatial positioning technology, applied in the field of speech, which can solve the problems of high algorithm complexity, environmental interference, and no commercial dedicated hardware.

Active Publication Date: 2011-06-22
北京华控智加科技有限公司
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Problems solved by technology

[0012] As a microphone for traditional sound source input and recording equipment, it is cheap and simple in structure. The disadvantage is that it is susceptible to environmental interference and cann

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  • Acoustic source spatial positioning method for distributed asynchronous acoustic sensor
  • Acoustic source spatial positioning method for distributed asynchronous acoustic sensor
  • Acoustic source spatial positioning method for distributed asynchronous acoustic sensor

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[0081] The present invention will be described in detail below with reference to the drawings.

[0082] Reference figure 1 , A method for spatial positioning of sound sources of distributed asynchronous acoustic sensors, including the following steps:

[0083] The first step, refer to figure 2 , Calculate the spatial coordinates under assumptions

[0084] First, assume that the number n and spatial position of all acoustic sensors remain unchanged during the data acquisition process, n is an integer greater than zero, the number of sound sources k remains unchanged, and k is an integer greater than zero. The distance between the sound source and the sound sensor conforms to the near-field model The physical properties of each acoustic sensor are the same, and then each acoustic sensor is numbered in sequence as acoustic sensor M1, M2..., Mn, and two acoustic sensors M1 and M2 with initial numbers 1 and 2 are selected, and acoustic sensor M1 The position of is the origin coordinate...

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Abstract

The invention discloses an acoustic source spatial positioning method for a distributed asynchronous acoustic sensor. The method comprises the following steps of: calculating a spatial coordinate under an assumed condition; transmitting a correcting signal to calculate a structure of the distributed asynchronous acoustic sensor; preprocessing the signal acquired by the distributed asynchronous acoustic sensor; calculating an acoustic source signal by a time delay estimation method to acquire a corresponding time delay estimated value; and finally calculating a spatial position coordinate of each acoustic source according to the time delay estimated value. The acoustic sensor is arranged and spaced without any limitation, signals acquired by the acoustic sensor are incompletely synchronousin a time domain, and the method has the advantages of low cost, convenience of use and the like and can be applied to a multi-person multi-party dialogue scene under a complex acoustic environment.

Description

technical field [0001] The invention belongs to the technical field of speech, and in particular relates to a sound source spatial positioning method of a distributed asynchronous sound sensor. Background technique [0002] With the continuous development of network and communication technology, the use of existing multimedia technology, network and communication technology, distributed processing technology, etc. can realize multi-person and multi-party dialogue in complex acoustic environment scenarios. [0003] Traditional sound source input and recording devices include headset microphones, omnidirectional and directional microphones, microphone arrays, and more. As a traditional sound source input and recording device, a single microphone has the advantages of small size and low price, but it does not have the ability to process environmental noise and locate the sound source; the microphone array is composed of multiple microphones arranged according to specific geomet...

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Application Information

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IPC IPC(8): G01S5/30
Inventor 杨毅刘加
Owner 北京华控智加科技有限公司
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