Room boundary estimation method based on mobile microphone array

Abstract

The invention discloses a room boundary estimation method based on a mobile microphone array. The method comprises the following steps: 1) acquiring a sound field signal of a sound source in a set room by using a microphone array; 2) estimating the positions of the direct sound and the reflected sound in the room to obtain a space directional diagram of the sound field; 3) taking the energy of thespatial pointing graph in a target direction as the energy estimation of the spatial position relative to the spatial position of the microphone array in the target direction; (4) moving the microphone array around the sound source, and repeating the steps (2)-(3); estimating sound field energy distribution of the room; 5) searching an energy distribution peak point according to the sound field energy distribution, and estimating a real sound source position and a mirror image sound source position; 6) performing array beam forming according to the sound source position, and extracting and calculating the time difference between the direct sound signal and the reflected sound signal to correct the mirror image sound source position, and 7) estimating the reflection boundary by using the real sound source position and the corrected mirror image sound source position information to obtain the room structure.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to an acoustic scene reconstruction method, in particular to a room structure perception method based on a mobile microphone array. Background technique [0002] Acoustic scene reconstruction is the process of estimating and reconstructing the reflective boundaries in the environment, thereby enabling the inference of room geometry. The results of acoustic scene reconstruction can be applied to sound source localization, signal enhancement, and wave field reproduction in reverberant environments, and can greatly improve the results. Therefore, this method has been extensively studied in recent years. [0003] In recent years, the research direction of acoustic scene reconstruction is mainly divided into two types of methods, one of which is based on the measurement of room impact responses (RIRs), including the calculation of a reflection time of arrival (TOA) using RIRs t...

AI Technical Summary

Problems solved by technology

The disadvantage of the current method is that the position of the sound source and the position of the microphone array need to be predicted in advance, and the sound source needs to be placed in multiple positions in the room to realize the position estimation of multiple boundaries, which is not practical.

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