A real-time rendering method for virtual auditory environment

Abstract

The invention discloses a real-time rendering method for a virtual auditory environment. According to the method, the initial information of the virtual auditory environment can be set, and a head trace tracker is used for detecting the dynamic spatial positions of six degrees of freedom of motion of the head of a listener in real time, and dynamically simulating sound sources, sound transmission, environment reflection, the radiation and binaural sound signal conversion of a receiver, and the like in real time according to the data. In the simulation of the binaural sound signal conversion, a method for realizing joint processing on a plurality of virtual sound sources in different directions and at difference distances by utilizing a shared filter is adopted, so that signal processing efficiency is improved. A binaural sound signal is subjected to earphone-ear canal transmission characteristic balancing, and then is fed to an earphone for replay, so that a realistic spatial auditory event or perception can be generated.

Description

technical field [0001] The patent of the present invention relates to the field of electroacoustic technology, in particular to a method for real-time rendering of a virtual auditory environment. Background technique [0002] The virtual auditory environment is artificially generated or controlled acoustic environment, so that the listener can have an auditory perception as if he is in a natural acoustic environment. It has important applications in scientific research, virtual reality, acoustic aided design, communication, etc. [0003] In a natural acoustic environment, the sound waves radiated by the sound source are transmitted through direct sound and various environmental boundary reflections and scattered sounds to form a spatial sound field, which contains temporal and spatial acoustic information of the sound source and the environment. When the listener enters the sound field, what the ears receive is the sound pressure including the reflection and scattering of it...

AI Technical Summary

Problems solved by technology

The existing virtual auditory environment real-time rendering methods generally adopt the following measures: limit the number of simultaneously simulated sound sources: use a small number of virtual sound sources to simulate the spatial information of environmental reflections (first order, at most second order) and omit higher-order reflections Information: Use a very low-order filter (HRTF) to simulate the scattering of sound waves by the receiver: only consider the far-field sound source and ignore the distance positioning information brought by the near-field head-related transfer function: only consider the movement of the listener's head level degree of freedom while omitting other degrees of freedom: reducing the dynamic performance of the system, etc., which inevitably affects the performance of the virtual auditory environment

The development of software and hardware technology can only alleviate the above contradictions to a certain extent, but cannot fundamentally solve the problem

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