Acoustic source spatial positioning method for distributed asynchronous acoustic sensor

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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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 cannot locate the sound source; the microphone array system has been widely studied, and the main reason for not commercializing it is the price of dedicated hardware. Expensive and computationally complex

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