AUDIO PROCESSING DEVICE AND A METHOD FOR ESTIMATING A SIGNAL-TO-NOISE-RATIO OF A SOUND SIGNAL

    公开(公告)号:US20190378531A1

    公开(公告)日:2019-12-12

    申请号:US16546928

    申请日:2019-08-21

    Applicant: Oticon A/S

    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.

    AUDIO PROCESSING DEVICE AND A METHOD FOR ESTIMATING A SIGNAL-TO-NOISE-RATIO OF A SOUND SIGNAL

    公开(公告)号:US20190200143A1

    公开(公告)日:2019-06-27

    申请号:US16291899

    申请日:2019-03-04

    Applicant: Oticon A/S

    CPC classification number: H04R25/505 H04R25/552 H04R2225/43

    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: determine a first signal to noise ratio estimate γ(k,n) of said electric input signal, and 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 parameters of said smoothing are determined in dependence of the first and/or the second signal to noise ratio estimates corresponding to a multitude of frequency band indices. The invention may be used in hearing aids, headsets, ear phones, active ear protection systems, handsfree telephone systems, mobile telephones, etc.

    AUDIO PROCESSING DEVICE, SYSTEM, USE AND METHOD

    公开(公告)号:US20190181823A1

    公开(公告)日:2019-06-13

    申请号:US16217964

    申请日:2018-12-12

    Applicant: Oticon A/S

    Abstract: The invention relates to a hearing aid comprising a first microphone configured to receive a first acoustic signal and to convert the first acoustic signal to a first electrical audio signal, a speaker configured to emit an acoustic output signal into an ear of a user of the hearing aid device, a first analog-to-digital converter for converting the first electrical audio signal into a first time-domain input signal, a first input unit comprising a first analysis filter bank which is configured to convert the first time-domain input signal to a number NI,1 of first input frequency bands wherein the number NI,1 of first input frequency bands is determined by said first analysis filter bank, a first frequency band bundling and allocation unit which is configured to bundle adjacent first input frequency bands and to allocate first frequency bands to be processed to a number NP,1 of first processing channels, a memory unit which is configured to store data indicating which of the first NI,1 input frequency bands are subject to a likelihood of feedback that is above a threshold, a signal processing unit is configured to process the first frequency bands to be processed in the number NP,1 of first processing channels, and wherein the number NP,1 of first processing channels is smaller than the number NI,1 of first input frequency bands, and wherein the first frequency band bundling and allocation unit is configured to generate a first bundling and allocation scheme which determines the bundling of the first NI,1 input frequency bands and the allocation of the first frequency bands to be processed to the first NP,1 processing channels wherein said first bundling and allocation scheme depends on the likelihood of feedback to occur in at least one of the first NI,1 input frequency bands.

    PROVIDING AND TRANSMITTING AUDIO SIGNAL
    136.
    发明申请

    公开(公告)号:US20190090072A1

    公开(公告)日:2019-03-21

    申请号:US16131613

    申请日:2018-09-14

    Applicant: Oticon A/S

    Abstract: There is provided a system (100) comprising an audio streaming device (102) having an audio streaming device receiver (104) arranged for receiving a first audio signal (106) comprising a first audio content and a second audio signal (108) comprising a second audio content, the system furthermore comprising a memory device (110) arranged for storing a user defined setting (112), a processor (114) arranged for providing an output audio signal (116), said output audio signal comprising a combination of the first audio content, and the second audio content, wherein the output audio signal comprises a ratio of a level of the first audio content and a level of the second audio content, and the ratio is determined based on the user defined setting (112), and wherein the system is further comprising a system transmitter (118) arranged for wirelessly transmitting the output audio signal (116).

    HEARING DEVICE COMPRISING A WIRELESS RECEIVER OF SOUND

    公开(公告)号:US20180262847A1

    公开(公告)日:2018-09-13

    申请号:US15915322

    申请日:2018-03-08

    Applicant: Oticon A/S

    Abstract: A hearing device, e.g. a hearing aid, adapted for being located at or in an ear of a user and/or for being fully or partially implanted in the head of the user, comprises A multitude of input units each providing an electric input signal representing a mixture of an audio signal from an audio signal source and possibly acoustic signals from other acoustic signal sources around the hearing device as received at the input unit in question; A wireless receiver for receiving and providing a direct representation of the audio signal; A beamformer filtering unit configured to receive said multitude of electric input signals, and providing a beamformed signal; A combination unit for providing a mixed signal comprising a combination of said direct representation of the audio signal and said beamformed signal, or signals originating therefrom; An output unit for presenting stimuli perceivable to the user as sound based on said mixed signal. The beamformer filtering unit comprises an audio signal cancelling beamformer configured to provide that sound from the direction from the hearing device to the audio signal source is cancelled or attenuated compared to other directions in said beamformed signal. The application further relates to a method of operating a hearing device.

    HEARING AID COMPRISING A DIRECTIONAL MICROPHONE SYSTEM

    公开(公告)号:US20170295436A1

    公开(公告)日:2017-10-12

    申请号:US15482006

    申请日:2017-04-07

    Applicant: Oticon A/S

    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=1M Wi(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.

    BINAURAL HEARING ASSISTANCE SYSTEM COMPRISING TWO WIRELESS INTERFACES

    公开(公告)号:US20170280256A1

    公开(公告)日:2017-09-28

    申请号:US15620149

    申请日:2017-06-12

    Applicant: Oticon A/S

    Abstract: The application relates to a binaural hearing assistance system comprising first and second hearing assistance devices adapted for being located at or in left and right ears of a user. The application further relates to a method of operating a binaural hearing assistance system. The object of the present application is to provide an improved binaural hearing assistance system. The problem is solved in that each of the first and second hearing assistance devices comprises a) a first wireless interface comprising first antenna and transceiver circuitry adapted for establishing a first communication link to the respective other hearing assistance device based on near-field communication; b) a second wireless interface comprising second antenna and transceiver circuitry adapted for establishing a second communication link to an auxiliary device based on far-field communication; c) a link control unit operatively coupled to the second antenna and transceiver circuitry and configured to repeatedly provide a second link quality measure indicative of a link quality of the second communication link; wherein the first and second hearing assistance devices are configured to exchange said respective second link quality measures between them via said first and/or second communication links. This has the advantage of providing a robust and flexible system. The invention may e.g. be used for binaural hearing assistance systems, e.g. binaural hearing aid systems, where audio quality and power consumption has to be mutually optimized.

    BINAURAL HEARING ASSISTANCE SYSTEM COMPRISING TWO WIRELESS INTERFACES

    公开(公告)号:US20170280255A1

    公开(公告)日:2017-09-28

    申请号:US15620120

    申请日:2017-06-12

    Applicant: Oticon A/S

    Abstract: The application relates to a binaural hearing assistance system comprising first and second hearing assistance devices adapted for being located at or in left and right ears of a user. The application further relates to a method of operating a binaural hearing assistance system. The object of the present application is to provide an improved binaural hearing assistance system. The problem is solved in that each of the first and second hearing assistance devices comprises a) a first wireless interface comprising first antenna and transceiver circuitry adapted for establishing a first communication link to the respective other hearing assistance device based on near-field communication; b) a second wireless interface comprising second antenna and transceiver circuitry adapted for establishing a second communication link to an auxiliary device based on far-field communication; c) a link control unit operatively coupled to the second antenna and transceiver circuitry and configured to repeatedly provide a second link quality measure indicative of a link quality of the second communication link; wherein the first and second hearing assistance devices are configured to exchange said respective second link quality measures between them via said first and/or second communication links. This has the advantage of providing a robust and flexible system. The invention may e.g. be used for binaural hearing assistance systems, e.g. binaural hearing aid systems, where audio quality and power consumption has to be mutually optimized.

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