Real-time rendering method for virtual auditory environment

A real-time rendering and environment technology, applied in the field of electro-acoustics, can solve the problems that cannot be fundamentally solved, reduce the dynamic performance of the system, etc., and achieve the effect of improving signal processing efficiency, reducing the amount of calculation and data, and simple signal processing

Active Publication Date: 2012-07-11
SOUTH CHINA UNIV OF TECH
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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 ig

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention is not limited to the range indicated by the examples.

[0040] The system block diagram of the present invention is as figure 1 As shown, it can analyze sound source signal, sound source characteristics (spatial position, directional characteristics), environmental characteristics (such as room shape and size, sound absorption coefficient of interface, air sound absorption coefficient), listener characteristics (HRTF data set ) and other information to define or input. The head tracker detects the spatial position and direction of the listener's head in real time, and transmits these dynamic data to the signal processing part in real time. The signal processing part dynamically simulates the three parts of the sound source, sound transmission, and listener according to the defined or input informa...

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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...

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Application Information

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IPC IPC(8): H04S7/00
Inventor 张承云谢菠荪
Owner SOUTH CHINA UNIV OF TECH
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