Loudspeaker array-based virtual acoustic environment auralization implementation method and system

A loudspeaker array, loudspeaker technology, applied in the direction of sensors, transducer circuits, sensor components, etc., can solve the decoding error and other problems, and achieve the effect of expanding the range

Active Publication Date: 2018-08-17
PEKING UNIV
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Problems solved by technology

However, on the one hand, the introduction of the regularization term will bring additional errors to the decoding. On the other hand, the selection of regularization coefficients generally depends on empirical selection by trial and error.

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  • Loudspeaker array-based virtual acoustic environment auralization implementation method and system
  • Loudspeaker array-based virtual acoustic environment auralization implementation method and system
  • Loudspeaker array-based virtual acoustic environment auralization implementation method and system

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Embodiment Construction

[0055] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings of the present invention.

[0056] figure 1 Shown is a block diagram of a virtual acoustic environment auralization system using matching projection decoding of the present invention. The specific implementation steps of the system of the present invention include room impulse response calculation and HOA sound field playback. figure 2 It is a block diagram of the room acoustic modeling system adopted by the system of the present invention. Concrete realization process of the present invention is as follows:

[0057] 1. Room impulse response calculation

[0058] Room acoustic modeling is to simulate the sound field in the virtual environment and obtain the room impulse response (Room Impulse Response, RIR) between any position and the sound source. This part also includes the import and...

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Abstract

The invention discloses a loudspeaker array-based virtual acoustic environment auralization implementation method and system. The method comprises the steps that 1, a bounding volume hierarchy structure tree of a geometric model of a target environment is constructed; 2, sound field distribution of a sound source is calculated by means of the bounding volume hierarchy structure tree and the location of a given sound source; 3, room impulse responses from the sound source to target locations in the target environment are calculated according to the sound field distribution of the sound source;4, the room impulse responses obtained through calculation are converted into HOA coefficient vectors; 5, the HOA coefficient vectors are decoded according to the actual placing locations of loudspeakers in a replaying environment to obtain gains of the various loudspeakers, and the gains are called as multi-channel room impulse responses; and 6, the multi-channel room impulse responses obtained through decoding are convolved with any sound source signal to serve as signals of the loudspeakers to reconstruct a sound field of the sound signal at the target location. According to the method, replaying of a virtual acoustic environment in a non-standard playing environment is achieved.

Description

technical field [0001] The invention belongs to the technical field of spatial sound field playback, and relates to a virtual auditory environment audible system, in particular to a method and system for realizing a virtual auditory environment audible system based on an Ambisonics principle and a matching projection decoding algorithm. Background technique [0002] The research on room acoustics can be traced back to the early 20th century, and the research on room acoustics is mostly used to assist the design of architectural acoustics and achieve auralization. In recent years, with the development of computer technology, many modeling techniques have been developed in the field of room acoustics research, and their application fields are becoming more and more extensive, including the construction of virtual acoustic environments in the fields of computer games and cognitive research. A challenging task is to use the computational results of these models to asonify the ac...

Claims

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Application Information

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IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 曲天书吴玺宏葛钟书
Owner PEKING UNIV
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