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Time-frequency-space domain joint weighted circular harmonic domain pseudo-sound intensity sound source positioning method

A sound source localization, time-frequency domain technology, applied in localization, measurement devices, instruments, etc., can solve problems such as increasing the number of microphones or array size, and improving positioning accuracy.

Active Publication Date: 2018-09-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

In addition, under the interference of noise and reverberation at the same time, the performance improvement of existing sound source localization methods is often at the expense of increasing the number of microphones or array size, but the localization accuracy improves little

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  • Time-frequency-space domain joint weighted circular harmonic domain pseudo-sound intensity sound source positioning method
  • Time-frequency-space domain joint weighted circular harmonic domain pseudo-sound intensity sound source positioning method
  • Time-frequency-space domain joint weighted circular harmonic domain pseudo-sound intensity sound source positioning method

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Embodiment Construction

[0059] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0060] The present invention is a circular harmonic domain pseudo-sound intensity sound source localization method suitable for time-frequency-space joint weighting of a circular microphone array, using a six-element microphone array and combining voice signal characteristics for sound source localization, Figure 7 Shown is a flow chart of the present invention, and its specific implementation steps are as follows:

[0061] Step 1: Arranging Q identical omnidirectional microphones at equal intervals to form a circular microphone array with a radius of r;

[0062] Create a circular microphone array model, such as figure 1 As shown, there are Q omnidirectional microphones M 1 ,...,M Q Composition, the center of the array is selected as the coordinate origin O, the microphones are arranged counterclockwise and equally spaced on a circle with a rad...

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Abstract

The invention discloses a time-frequency-space domain joint weighted circular harmonic domain pseudo-sound intensity sound source positioning method. The method comprises the steps of: acquiring a voice signal by using a pre-designed six-element circular microphone array; transforming the acquired voice signal into a time-frequency domain after considering that the voice signal has a short-time stability property, and performing filtering processing by utilizing time-frequency domain PHAT weighting to reduce the influence of noise and reverberation on positioning performance; utilizing a zero-order eigen beam and a first-order eigen beam after normalization and adopting a time-frequency-space domain PHAT weighted circular harmonic domain pseudo-sound intensity method to perform angle roughestimation; and constructing a space domain beam directivity function by utilizing a roughly estimated angle to obtain a time-frequency-space domain PHAT joint weighted directivity weighting zero-order eigen beam after normalization, and then calculating to obtain a precise sound source estimated angle by utilizing a time-frequency-space domain joint weighted circular harmonic domain pseudo-soundintensity method.

Description

technical field [0001] The invention relates to the technical field of sound source localization, in particular to a sound source localization method of pseudo-sound intensity in the circular harmonic domain with joint weighting of time-frequency-space domain. Background technique [0002] In audio and speech signal processing, sound source localization technology using microphone arrays is an important research direction. Linear microphone arrays have been widely used in sound source localization because of their simplicity and easy understanding, such as sonar (see Literature: Wang Yan, Zou Nan, Liang Guolong. Near-field active correction method for hydrophone array position in strong multi-path environment [J]. Acta Physica Sinica, 2015, 64(2): 024304 1-10), video conference call (see Literature: Barbara Rauch, FriedrichFaubel, Dietrich Klakow.An analysis of nonstationary variance estimates in the maximum negentropy beamformer[C].Joint Workshop on Hands-free SpeechCommuni...

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 宋宫琨琨陈华伟吕中兴张普芬
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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