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Position distribution method of spherical surface sound source in virtual reality sound rendering

A spherical sound source and virtual reality technology, applied in the field of virtual reality, can solve problems such as authenticity errors and the inability of the surface of the sound source to meet the omnidirectional requirements of the sound source.

Active Publication Date: 2015-04-29
SHANGHAI UNIV
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AI Technical Summary

Problems solved by technology

[0005] This method of distribution due to the elevation angle The probability density distribution function of can not completely converge to , causing the location distribution of the sound source surface to fail to meet the omnidirectional requirements of the sound source, thus causing authenticity errors

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  • Position distribution method of spherical surface sound source in virtual reality sound rendering
  • Position distribution method of spherical surface sound source in virtual reality sound rendering
  • Position distribution method of spherical surface sound source in virtual reality sound rendering

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0027] The algorithm flow chart of the position distribution method on the spherical sound source surface of the present invention is as follows figure 1 As shown, it is mainly processed by transforming the position distribution of the sound source surface into the position distribution of the unit block on the disk, and then deriving the position distribution of the sound source surface.

[0028] The present invention, that is, a position distribution method of a spherical sound source surface in virtual reality sound rendering, comprises the following steps:

[0029] Step 1: Divide the surface of the spherical sound source into upper and lower hemispheres, take the hemisphere, and divide it into several rings, each ring is divided into several unit blocks with equal areas, any point in the unit block The coordinates are ,in represents t...

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Abstract

The invention relates to a position distribution method of a spherical surface sound source in virtual reality sound rendering. The method comprises the following steps: (1) dividing a spherical surface into an upper half spherical surface and a lower half spherical surface, and dividing the upper half spherical surface into different circular rings; dividing the circular rings into a plurality of equal unit blocks; (2) projecting to a two-dimensional plane circular disc by Lambert mapping; converting a unit block coordinate from (theta, phi) to (gamma, phi); (3) dividing the circular disc into a plurality of unit blocks with the equal area; (4) calculating an aspect ratio shown in the specification of each unit block on the circular disc and an aspect ratio shown in the specification of the unit blocks on the half spherical surfaces; (5) recursively calculating an elevation phii of the circular ring of each half spherical surface; (6) calculating a horizontal angle theta of the unit blocks on the half spherical surfaces and obtaining position distribution (theta, phi) of all the unit blocks on the half spherical surfaces; and (7) calculating position distribution (theta, phi) of all the unit blocks on the spherical surfaces. With the adoption of the position distribution method of the spherical surface sound source, the elevation phi is almost converged to 1 / 2sinphi so that the omni-directional property of the sound source is guaranteed and the reality of virtual reality sounds is guaranteed.

Description

technical field [0001] The invention relates to a position distribution method of a spherical sound source surface in virtual reality sound rendering, and belongs to the technical field of virtual reality. Background technique [0002] At present, the spherical sound source of virtual reality sound rendering generally adopts the Monte Carlo distribution method, and the position distribution of the spherical sound source surface is [0003] (1) [0004] in, is the horizontal angle, is the elevation angle, , The distribution is represented in the interval random number in . [0005] This method of distribution due to the elevation angle The probability density distribution function of can not completely converge to , causing the location distribution of the sound source surface to fail to meet the omnidirectional requirements of the sound source, thus causing authenticity errors. The sense of body awareness manifested as virtual reality sound is weakened. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01
CPCG06F3/01G06F2203/012
Inventor 朱梦尧贺君炜辜城村陈燕卢好峰
Owner SHANGHAI UNIV