Method of estimating weighting function of audio signals in a hearing aid
First Claim
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1. A method of generating an audible signal in a hearing aid by estimating a weighting function of received audio signals, the hearing aid is adapted to be worn by a user;
- the method comprises the steps of;
estimating a directional signal by estimating a weighted sum of two or more microphone signals from two or more microphones, where a first microphone of the two or more microphones is a front microphone, and where a second microphone of the two or more microphones is a rear microphone;
estimating a direction-dependent time-frequency gain, andsynthesizing an output signal;
wherein estimating the direction-dependent time-frequency gain comprises;
obtaining at least two directional signals each containing a time-frequency representation of a target signal and a noise signal; and
where a first of the directional signals is defined as a front aiming signal, and where a second of the directional signals is defined as a rear aiming signal;
using the time-frequency representation of the target signal and the noise signal to estimate a time-frequency mask; and
using the estimated time-frequency mask to estimate the direction-dependent time-frequency gain.
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Abstract
Disclosed is method of generating an audible signal in a hearing aid by estimating a weighting function of received audio signals, the hearing aid is adapted to be worn by a user; the method comprises the steps of:
- estimating a directional signal by estimating a weighted sum of two or more microphone signals from two or more microphones, where a first microphone of the two or more microphones is a front microphone, and where a second microphone of the two or more microphones is a rear microphone;
- estimating a direction-dependent time-frequency gain, and synthesizing an output signal;
- wherein estimating the direction-dependent time-frequency gain comprises:
- obtaining at least two directional signals each containing a time-frequency representation of a target signal and a noise signal; and where a first of the directional signals is defined as a front aiming signal, and where a second of the directional signals is defined as a rear aiming signal;
- using the time-frequency representation of the target signal and the noise signal to estimate a time-frequency mask; and
- using the estimated time-frequency mask to estimate the direction-dependent time-frequency gain.
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Citations
41 Claims
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1. A method of generating an audible signal in a hearing aid by estimating a weighting function of received audio signals, the hearing aid is adapted to be worn by a user;
- the method comprises the steps of;
estimating a directional signal by estimating a weighted sum of two or more microphone signals from two or more microphones, where a first microphone of the two or more microphones is a front microphone, and where a second microphone of the two or more microphones is a rear microphone; estimating a direction-dependent time-frequency gain, and synthesizing an output signal; wherein estimating the direction-dependent time-frequency gain comprises; obtaining at least two directional signals each containing a time-frequency representation of a target signal and a noise signal; and
where a first of the directional signals is defined as a front aiming signal, and where a second of the directional signals is defined as a rear aiming signal;using the time-frequency representation of the target signal and the noise signal to estimate a time-frequency mask; and using the estimated time-frequency mask to estimate the direction-dependent time-frequency gain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 39, 41)
- the method comprises the steps of;
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18. A hearing aid adapted to be worn by a user, comprising:
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two or more microphones, a first microphone of the two or more microphones being a front microphone and a second microphone of the two or more microphones being a rear microphone, a first module housing at least one of the two or more microphones; a signal processing unit; and one or more output transducers configured to output a synthesized output signal, wherein the signal processing unit is configured to obtain at least two directional signals, a first of the at least two directional signals being a front aiming signal and a second of the at least two directional signals being a rear aiming signal, each of the at least two directional signals containing a time-frequency representation of a target signal and a noise signal, estimate a time-frequency mask based on the time-frequency representation of the target signal and the noise signal in each of the at least two directional signals, estimate a direction-dependent time-frequency gain based on the estimated time-frequency mask, and synthesize an output signal to be output by the one or more output transducers based on the direction-dependent time-frequency gain. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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40. A tangible computer-readable medium encoded with instructions for causing a data processing system to perform a method, when said instructions are executed on the data processing system, the method comprising:
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estimating a directional signal b estimating a weighted sum of two or more microphone signals from two or more microphones, where a first microphone of the two or more microphones is a front microphone, and where a second microphone of the two or more microphones is a rear microphone; estimating a direction-dependent time-frequency gain, and synthesizing an output signal; wherein estimating the direction-dependent time-frequency gain comprises; obtaining at least two directional signals each containing a time-frequency representation of a target signal and a noise signal; and
where a first of the directional signals is defined as a front aiming signal, and where a second of the directional signals is defined as a rear aiming signal;using the time-frequency representation of the target signal and the noise signal to estimate a time-frequency mask; and using the estimated time-frequency mask to estimate the direction-dependent time-frequency gain.
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Specification