公开(公告)号：US10861478B2

公开(公告)日：2020-12-08

申请号：US16546928

申请日：2019-08-21

Applicant: Oticon A/S

Inventor： Jesper Jensen ,  Andreas Thelander Bertelsen ,  Michael Syskind Pedersen

IPC: G10L15/20 ,  G10L21/0208 ,  G10L19/26

Abstract: An audio processing device comprises a) at least one input unit for providing a time-frequency representation Y(k,n) of an electric input signal representing sound consisting of target speech and noise signal components, where k and n are frequency band and time frame indices, respectively, b) a noise reduction system configured to b1) determine a first signal to noise ratio estimate γ(k,n) of said electric input signal, and to b2) determine a second signal to noise signal ratio estimate ζ(k,n) of said electric input signal from said first signal to noise ratio estimate γ(k,n) based on a recursive algorithm providing non-linear smoothing, and wherein a determination of said one or more bias and/or smoothing parameters comprises the use of supervised learning, e.g. one or more neural networks. The invention may be used in audio processing devices, such as hearing aids, headsets, ear phones, active ear protection systems, handsfree telephone systems, mobile telephones, etc.

公开(公告)号：US10587962B2

公开(公告)日：2020-03-10

申请号：US16362056

申请日：2019-03-22

Applicant: Oticon A/S

Inventor： Michael Syskind Pedersen ,  Andreas Thelander Bertelsen

IPC: H04R25/00

Abstract: A hearing aid comprises a BTE-part adapted for being located behind an ear (ear) of a user, and comprising a) a multitude M of microphones, which—when located behind the ear of the user—are characterized by respective transfer functions, HBTEi(θ, φ, r, k), representative of propagation of sound from sound sources S to the respective microphones b) a memory unit comprising complex, frequency dependent constants Wi(k)′, i=1, . . . , M, c) a beamformer filtering unit for providing a beamformed signal Y as a weighted combination of the microphone signals using said complex, frequency dependent constants The frequency dependent constants are determined to provide a resulting transfer function Hpinna(θ, φ, r, k)=Σi=1MWi(k)·HBTEi(θ, φ, r, k), so that a difference between the resulting transfer function Hpinna(θ, φ, r, k) and a transfer function HITE(θ, φ, r, k) of a microphone located close to or in the ear canal fulfils a predefined criterion.

公开(公告)号：US10375486B2

公开(公告)日：2019-08-06

申请号：US16194082

申请日：2018-11-16

Applicant: Oticon A/S

Inventor： Andreas Thelander Bertelsen ,  Michael Syskind Pedersen ,  Jesper Jensen ,  Thomas Kaulberg ,  Morten Christophersen

IPC: H04R25/00 ,  G10L21/0232 ,  G10L21/0216

Abstract: A hearing aid comprises a) first and second microphones b) an adaptive beamformer filtering unit comprising, b1) a memory comprising a first and second sets of complex frequency dependent weighting parameters representing a first and second beam patterns, b3) an adaptive beamformer processing unit providing an adaptation parameter βopt(k) representing an adaptive beam pattern, b4) a memory comprising a fixed adaptation parameter βfix(k) representing a third, fixed beam pattern, b5) a mixing unit providing a resulting complex, frequency dependent adaptation parameter βmix(k) as a combination of said fixed and adaptively determined frequency dependent adaptation parameters βfix(k) and βopt(k), respectively, and b6) a resulting beamformer (Y) for providing a resulting beamformed signal YBF based on first and second microphone signals, said first and second sets of complex frequency dependent weighting parameters, and said resulting complex, frequency dependent adaptation parameter βmix(k).

公开(公告)号：US10269368B2

公开(公告)日：2019-04-23

申请号：US15608224

申请日：2017-05-30

Applicant: Oticon A/S

Inventor： Jesper Jensen ,  Ulrik Kjems ,  Andreas Thelander Bertelsen ,  Michael Syskind Pedersen

IPC: G10L15/20 ,  G10L21/0232 ,  H04R1/10 ,  G10L21/0264 ,  H04R25/00 ,  G10L21/0216 ,  A61F11/06 ,  H04B1/3827 ,  H04M1/60

Abstract: An audio processing device comprises a) at least one input unit for providing time-frequency representation Y(k,n) of an electric input signal representing sound consisting of target speech and noise signal components, where k and n are frequency band and time frame indices, respectively, b) a noise detection and/or reduction system configured to b1) determine an a posteriori signal to noise ratio estimate γ(k,n) of said electric input signal, and to b2) determine an a priori target signal to noise signal ratio estimate ζ(k,n) of said electric input signal from said a posteriori signal to noise ratio estimate γ(k,n) based on a recursive decision directed algorithm. The application further relates to a method of of estimating an a priori signal to noise ratio. The invention may e.g. be used for the hearing aids, headsets, ear phones, active ear protection systems, handsfree telephone systems, mobile telephones, etc.

公开(公告)号：US10165373B2

公开(公告)日：2018-12-25

申请号：US15482188

申请日：2017-04-07

Applicant: Oticon A/S

Inventor： Andreas Thelander Bertelsen ,  Michael Syskind Pedersen ,  Jesper Jensen ,  Thomas Kaulberg ,  Morten Christophersen

IPC: H04R25/00 ,  G10L21/0232 ,  G10L21/0216

Abstract: A hearing aid comprises a) first and second microphones b) an adaptive beamformer filtering unit comprising, b1) a first and second memories comprising a first and second sets of complex frequency dependent weighting parameters representing a first and second beam patterns, where said first and second sets of weighting parameters are predetermined initial values or values updated during operation of the hearing aid, b3) an adaptive beamformer processing unit providing an adaptation parameter βopt(k) representing an adaptive beam pattern configured to attenuate unwanted noise under the constraint that sound from a target direction is essentially unaltered, b4) a third memory comprising a fixed adaptation parameter βfix(k) representing a third, fixed beam pattern, b5) a mixing unit providing a resulting complex, frequency dependent adaptation parameter βmix(k) as a combination of said fixed and adaptively determined frequency dependent adaptation parameters βfix(k) and βopt(k), respectively, and b6) a resulting beamformer (Y) for providing a resulting beamformed signal YBF based on first and second microphone signals, said first and second sets of complex frequency dependent weighting parameters, and said resulting complex, frequency dependent adaptation parameter βmix(k).