Distributed microphone array multi-sound-source positioning system in a reverberation room

A technology of microphone array and positioning system, applied in the field of signal processing, can solve the problem of large number of microphones

Inactive Publication Date: 2018-11-16
DALIAN UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] In order to solve the problem that the existing multi-sound source localization needs the number of microphones to be greater than the number of sound sources, the present invention proposes the following scheme:

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  • Distributed microphone array multi-sound-source positioning system in a reverberation room
  • Distributed microphone array multi-sound-source positioning system in a reverberation room
  • Distributed microphone array multi-sound-source positioning system in a reverberation room

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Embodiment Construction

[0053] In order to make the technical content, features, etc. of the present invention more obvious and understandable, the following combination figure 1 The implementation steps of the present invention are described. Briefly, the multi-sound source positioning method of the distributed microphone array in the reverberation room of the present invention can be implemented by software, and mainly involves the following steps:

[0054] (1) First determine the size of the room, that is, obtain the length, width, and height values ​​of the room respectively, and at the same time determine the position of the microphone array, all in meters.

[0055] (2) Construct the room impulse response and generate the compressed observation matrix.

[0056] (3) The relationship between the multi-sound source signal, the compressed observation matrix and the microphone observation data is shown by a set of underdetermined linear equations, which is the reverberation multi-sound source localiz...

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Abstract

The invention discloses a distributed microphone array multi-sound-source positioning system in a reverberation room. The system mainly solves the problem that the number of microphone array sound sources in the reverberation room is always greater than the number of microphones. The distributed microphone array multi-sound-source positioning system in a reverberation room is characterized by comprising a microphone array consisting of M microphones and a positioning system, wherein a plurality of instructions are stored in the positioning; the instructions are loaded by a processor and restores a block sparse signal by an observation signal X received by M microphones and a compressed observation matrix; and the sparse support set of the block sparse signal S in the space-frequency domaincorresponds to the number and the positions of actual sound sources. The system positions multiple sound sources by using the distributed microphone array having an underdetermined number of microphones in the reverberation room, is not constrained by the array type, and greatly reduces the size of the array compared with current massive arrays with practical values, thereby reducing hardware cost and computational burden.

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...

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 张奕
Owner DALIAN UNIVERSITY
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