System for estimating position of microphone in distributed microphone array

Abstract

The invention discloses a system for estimating the position of a microphone in a distributed microphone array. The system comprises a sound source signal generating module, a loudspeaker, a reference microphone, the microphone to be positioned and a microphone position estimation module. Signals output by the output end of the sound source signal generating module are converted into sound through the loudspeaker to be played in a work place of the distributed microphone array; the sound is received by the reference microphone and the microphone to be positioned; the signals received by the reference microphone and the signals received by the microphone to be positioned are simultaneously transmitted to the microphone position estimation module corresponding to the microphone to be positioned. Three signals different in frequency band are used as sounding signals of three sound sources, the three sound sources are collected and separated in the microphone position estimation process in a one-off mode, and then the position of the microphone can be estimated on line. The system combines the ranging methods based on energy and time delay, rough estimation and accurate estimation of the distance are performed successively, and thus the position can be estimated with less calculation amount and higher accuracy.

Description

technical field [0001] The invention relates to a position estimation technology of a microphone array, in particular to a microphone position estimation system in a distributed microphone array. Background technique [0002] The microphone array is composed of multiple microphones. Each microphone collects signals at the same time and jointly processes the signals. It can not only effectively suppress noise and reverberation, obtain good sound quality, but also obtain the direction information of the sound. It plays an important role in applications such as sound source localization and sound source separation. In recent years, with the advancement of integrated circuit technology and the development of network communication and mobile computing technology, a number of portable devices (such as laptops, smart phones, etc.) that are usually equipped with Wi-Fi, Bluetooth, and audio interfaces have emerged. And continue to popularize and apply in daily work and life. Using ...

AI Technical Summary

Problems solved by technology

However, the signal acquisition operation of this method is cumbersome and the efficiency is low. It can only be calculated offline, and the online estimation of the microphone position cannot be realized.

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