Positioning method and apparatus in three-dimensional space of reverberation

Patent metadata

Field	Value
Publication number	US-2016336002-A1
Application number	US-201515110916-A
Country	US
Kind code	A1
Filing date	Jan 23, 2015
Priority date	Jan 23, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

The present disclosure relates to a positioning method and apparatus in a three-dimensional space of reverberation. The method includes the following steps: constructing a three-dimensional space frame surrounding a point sound source and a sound receiver, and acquiring barycentric coordinates of the three-dimensional space frame; establishing an X-Y coordinate system by using the barycentric coordinates as the origin; determining a vector from the sound receiver to the barycentric coordinates and a facing angle between the sound receiver and the barycentric coordinates according to the established X-Y coordinate system; and obtaining reverberation intensity through calculation according to the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates, and using the reverberation intensity as a control parameter.

First claim

What is claimed is:

1 . A positioning method in a three-dimensional space of reverberation, including the following steps:
constructing a three-dimensional space frame surrounding a point sound source and a sound receiver, and acquiring barycentric coordinates of the three-dimensional space frame; establishing an X-Y coordinate system by using the barycentric coordinates as the origin; determining a vector from the sound receiver to the barycentric coordinates and a facing angle between the sound receiver and the barycentric coordinates according to the established X-Y coordinate system; and obtaining reverberation intensity through calculation according to the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates, and using the reverberation intensity as a control parameter.

2 . The method according to claim 1 , wherein the step of establishing an X-Y coordinate system by using the barycentric coordinates as the origin includes:
acquiring a closest connecting line between the barycentric coordinates and a side of the three-dimensional space frame; and using the barycentric coordinates as the origin, establishing an X axis according to the barycentric coordinates and the closest connecting line, and establishing a Y axis by using a direction of the closest connecting line facing the barycentric coordinates as a 0-degree angle, so as to establish the X-Y coordinate system.

3 . The method according to claim 2 , wherein the step of obtaining reverberation intensity through calculation according to the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates includes:
obtaining the reverberation intensity through calculation by using a radius being the length of the closest connecting line, a preset minimum value and maximum value of reverberation, and the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates.

4 . The method according to claim 3 , wherein, a formula of obtaining the reverberation intensity through calculation by using a radius being the length of the closest connecting line, a preset minimum value and maximum value of reverberation, and the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates is:
Q =((| L|/R *(MaxRev−MinRev)* L/L dot D )+MinRev)/MaxRev
wherein Q denotes the reverberation intensity, L denotes the vector from the sound receiver to the barycentric coordinates, R denotes the radius being the length of the closest connecting line, MaxRev denotes the preset reverberation maximum value, MinRev denotes the preset reverberation minimum value, dot denotes a dot product, and D denotes the facing angle between the sound receiver and the barycentric coordinates.

5 . The method according to claim 1 , wherein the method further includes:
inputting the reverberation intensity as the control parameter into a reverb effects unit or a vocoder or a delay effects unit.

6 . A positioning apparatus in a three-dimensional space of reverberation, including:
a barycentric coordinates determining module, configured to construct a three-dimensional space frame surrounding a point sound source and a sound receiver, and acquire barycentric coordinates of the three-dimensional space frame; a coordinate system establishing module, configured to establish an X-Y coordinate system by using the barycentric coordinates as the origin; a sound receiver positioning module, configured to determine a vector from the sound receiver to the barycentric coordinates and a facing angle between the sound receiver and the barycentric coordinates according to the established X-Y coordinate system; and a parameter acquiring module, configured to obtain reverberation intensity through calculation according to the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates, and use the reverberation intensity as a control parameter.

7 . The apparatus according to claim 6 , wherein the coordinate system establishing module includes:
an acquiring unit, configured to acquire a closest connecting line between the barycentric coordinates and a side of the three-dimensional space frame; an establishing unit, configured to use the barycentric coordinates as the origin, establish an X axis according to the barycentric coordinates and the closest connecting line, and establish a Y axis by using a direction of the closest connecting line facing the barycentric coordinates as a 0-degree angle, so as to establish the X-Y coordinate system.

8 . The apparatus according to claim 7 , wherein the parameter acquiring module is further configured to obtain the reverberation intensity through calculation by using a radius being the length of the closest connecting line, a preset minimum value and maximum value of reverberation, and the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates.

9 . The apparatus according to claim 8 , wherein a formula of obtaining the reverberation intensity through calculation by using a radius being the length of the closest connecting line, a preset minimum value and maximum value of reverberation, and the vector from the sound receiver to the barycentric coordinates and the facing angle between the sound receiver and the barycentric coordinates is:
Q =((| L|/R *(MaxRev−MinRev)* L/L dot D )+MinRev)/MaxRev
wherein Q denotes the reverberation intensity, L denotes the vector from the sound receiver to the barycentric coordinates, R denotes the radius being the length of the closest connecting line, MaxRev denotes the preset reverberation maximum value, MinRev denotes the preset reverberation minimum value, dot denotes a dot product, and D denotes the facing angle between the sound receiver and the barycentric coordinates.

10 . The apparatus according to claim 6 , wherein the apparatus further includes:
an input module, configured to input the reverberation intensity as the control parameter into a reverb effects unit or a vocoder or a delay effects unit.

Assignees

• Tencent Tech Shenzhen Co Ltd

Inventors

• Wu Xiayu
• Wan Rong

Classifications

• G10K15/08 Primary

  Arrangements for producing a reverberation or echo sound {(modifying acoustic properties to change reverberation time G10K11/002)} · CPC title

• G06F30/20 Primary

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title