Apparatus and method for microphone positioning based on a spatial power density

Patent metadata

Field	Value
Publication number	US-10284947-B2
Application number	US-201213445560-A
Country	US
Kind code	B2
Filing date	Apr 12, 2012
Priority date	Dec 2, 2011
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

An apparatus for microphone positioning includes a spatial power distribution determiner and a spatial information estimator. The spatial power distribution determiner is adapted to determine a spatial power density indicating power values for a plurality of locations of an environment based on sound source information indicating one or more power values and one or more position values of one or more sound sources located in the environment. The spatial information estimator is adapted to estimate acoustic spatial information based on the spatial power density.

First claim

The invention claimed is:

1. An apparatus for microphone positioning, comprising:
a spatial power density determiner for determining a spatial power density indicating power values for a plurality of locations of an environment based on sound source information indicating one or more power values and one or more position values of one or more sound sources located in the environment, and
a spatial information estimator for estimating a position of a microphone based on the spatial power density,
wherein the spatial information estimator comprises a sound scene center estimator for estimating a position of a center of a sound scene in the environment,
wherein the spatial information estimator furthermore comprises a microphone position calculator for determining the position of the microphone based on the position of the center of the sound scene,
wherein the spatial information estimator comprises an orientation determiner for determining an orientation of the microphone, wherein the orientation determiner is adapted to determine the orientation of the microphone based on the spatial power density,
wherein the spatial power density determiner is adapted to determine the spatial power density by applying the formula

Γ
⁡

(

x
,
y
,
k
,
n

)

=

∑

i
=
1

N

⁢

power
i

⁡

(

k
,
n

)

·

g
⁡

(

γ
i

,

x
-

x
ESSi

,

y
-

y
ESSi

,
k
,
n

)

,

to calculate the power values Γ(x,y,k,n) for the plurality of locations in the environment for a time-frequency bin (k, n), wherein k denotes the frequency index and n denotes the time index, wherein N denotes a number of the sound sources, wherein x, y, denote coordinates of one of the plurality of locations, wherein power i(k,n) denotes the power value at an i-th sound source for time-frequency bin (k, n), wherein x ESSi , y ESSi denote coordinates of the i-th sound source, wherein γ i is a scalar value and wherein g is a function depending on x, y, x ESSi , y ESSi k, n and γ i , when the environment is a two-dimensional environment, or
wherein the spatial power density determiner is adapted to determine the spatial power density by applying the formula

Γ
⁡

(

x
,
y
,
z
,
k
,
n

)

=

∑

i
=
1

N

⁢

power
i

⁡

(

k
,
n

)

·

g
⁡

(

γ
i

,

x
-

x
ESSi

,

y
-

y
ESSi

,

z
-

z
ESSi

,
k
,
n

)

,

to calculate the power values Γ(x,y,z,k,n) for the plurality of locations of the environment for a time-frequency bin (k, n), wherein k denotes the frequency index and n denotes the time index, wherein N denotes a number of the sound sources, wherein x, y, z denote coordinates of one of the plurality of locations, wherein power i(k,n) denotes the power value at an i-th sound source for time-frequency bin (k, n), wherein x ESSi , y ESSi , z ESSi denote coordinates of the i-th sound source, wherein γ i is a scalar value and wherein g is a function depending on x, y, z, x ESSi , y ESSi , z ESSi k, n and γ i , when the environment is a three-dimensional environment.

2. The apparatus according to claim 1 , wherein the microphone position calculator is adapted to calculate the position of the micr

Assignees

• Del Galdo Giovanni
• Thiergart Oliver
• Kuech Fabian
• Habets Emanuel
• Craciun Alexandra
• Fraunhofer Ges Forschung

Inventors

• Del Galdo Giovanni
• Thiergart Oliver
• Kuech Fabian
• Habets Emanuel
• Craciun Alexandra

Classifications

• H05K999/99

  Electricity · mapped topic

• G10L15/08

  Speech classification or search · CPC title

• G11C2207/16

  Solid state audio · CPC title

• H04R3/005 Primary

  for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407) · CPC title

• G10L19/12

  the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders · CPC title