Sound source direction positioning method based on difference array

Abstract

The invention relates to a sound source direction positioning method based on a difference array. The sound source direction positioning method based on a difference array includes the steps: utilizing a plane microphone array to record input signals, and calculating a covariance matrix; further performing decomposition of characteristic constants to acquire the characteristic vector of the maximum characteristic constant and take the characteristic vector of the maximum characteristic constant as the target sound source, and calculating the covariance matrix of the target sound source; designing two orthogonal N-step dual difference array wave beam forming; based on the weight of wave beam forming and the covariance matrix of the target sound source, calculating the sound source direction candidate item; utilizing the sound source direction candidate item to calculate the sound source direction candidate items in other three quadrants, and forming a sound source direction candidate item group together; and utilizing the wave beam forming method for delay-and-sum to perform wave beam forming, and comparing the energy of the wave beams formed by the four sound source direction candidate items, and selecting the sound source direction candidate item with the maximum energy as the target sound source direction. The sound source direction positioning method based on a difference array has the advantages of high efficiency, low computational complexity and high accuracy, and is a new positioning method.

Description

technical field [0001] The invention relates to the technical field of sound source localization, in particular to a sound source direction localization method based on a differential array. Background technique [0002] The sound source localization technology based on the microphone array is a research hotspot at home and abroad in recent years. Its main principle is: collect the sound source signal through the microphone array with a certain geometric topological structure, and process the voice signal through the array signal processing technology. analysis to determine the location of the sound source. [0003] At present, sound source localization technology based on microphone arrays has been widely used in many fields, such as video conferencing, sound detection, speech enhancement, speech recognition, speaker recognition, intelligent robots, monitoring monitoring systems, hearing aids, etc. Traditional sound source localization algorithms mainly include: [0004] ...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of the prior art, provide a sound source direction localization method based on differential arrays, and solve the problems in the traditional sound source localization method, such as the huge amount of calculation, the susceptibility to the influence of reverberation and noise interference, and the The problem of poor stickiness

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