Multi-sound source localization method based on distributed microphone arrays in reverberation room

Abstract

The invention discloses a multi-sound source localization method based on distributed microphone arrays in a reverberation room, and mainly solves the problem that the number of microphone array soundsources in the reverberant room is always larger than that of microphones. The method is mainly implemented by steps as follows: (1) constructing a compressed sensing localization algorithm accordingto characteristics of reverberation multi-sound source signal propagation and signal reception of the microphones; (2) constructing a compressed observation matrix with an Image method on the premisethat size of the room and positions of the microphones are known; (3) performing solution with a multi-sound source localization algorithm based on the microphone arrays with an undetermined number in the reverberation room by block sparsity optimization to obtain positions and number of the multiple sound sources in the space. Multi-sound source localization based on the distributed microphone arrays with an undetermined number in the reverberation room is achieved, the method is not constrained by formation, and compared with current mass arrays with practical value, the array size is greatly reduced, so that the hardware cost is reduced, and the computational burden is also reduced.

Description

technical field [0001] The invention belongs to the field of signal processing, and further relates to a multi-sound source localization method and system based on compressive sensing in a reverberation room with a distributed underdetermined number of microphone arrays. Background technique [0002] With the rapid development of the communication industry, array signal processing has become a research hotspot. Since the 1990s, sound source localization technology based on microphone arrays has made great progress and development in various fields. For example, in the military field, sound source localization technology can be used to determine the position of snipers and estimate the firing position of artillery, etc.; in industrial applications, the microphone array sound source localization technology is used to locate the failure of mechanical equipment; The sound source localization technology can play a good role in compensating for the dead angle and poor vision in t...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the number of microphones is greater than the number of sound sources in existing multi-sound source positioning, the present invention proposes the following technical solutions:

Images