Patents by Inventor Sorin V. Dusan

Sorin V. Dusan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10531808
    Abstract: A wearable device configured to acquire and process electrocardiographic measurements, detect lead inversion and correct the acquired measurements for lead inversion is provided. In one example, the wearable device can detect lead inversion by first assessing whether the P-wave of a given electrocardiographic measurement has a negative amplitude, and if the P-wave is found to be negative, the device can determine if the magnitude of the R-wave is smaller than the maximum of the magnitudes of the S-wave and the Q-wave. In another example, the device can be put through an enrollment procedure in which electrocardiographic measurements are taken with the device being worn at known locations on the body. Once the enrollment procedure is completed, when the device is being used, any electrocardiographic results obtained can be compared against the measurements taken during the enrollment phase, and the location of the device on the body can be determined.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: January 14, 2020
    Assignee: Apple Inc.
    Inventor: Sorin V. Dusan
  • Patent number: 10492726
    Abstract: A wearable device that attaches to a body part of a user via an attachment member operates in at least a connected and a disconnected state. One or more sensors located in the wearable device and/or the attachment member detect the user's body part when present. Such detection may only be performed when the attachment member is in a connected configuration and may be used to switch the wearable device between the connected and disconnected states. In this way, the wearable device operates in the connected state when worn by a user and in the disconnected state when not worn by the user.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: December 3, 2019
    Assignee: Apple Inc.
    Inventors: Sorin V. Dusan, Daniel J. Culbert, Todd K. Whitehurst
  • Patent number: 10482899
    Abstract: An audio system has a housing in which are integrated a number of microphones. A programmed processor accesses the microphone signals and produces a number of acoustic pick up beams based groups of microphones, an estimation of voice activity and an estimation of noise characteristics on each beam. Two or more beams including a voice beam that is used to pick up a desired voice and a noise beam that is used to provide information to estimate ambient noise are adaptively selected from among the plurality of beams, based on thresholds for voice separation and thresholds for noise-matching. Other embodiments are also described and claimed.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: November 19, 2019
    Assignee: Apple Inc.
    Inventors: Sean A. Ramprashad, Esge B. Andersen, Joshua D. Atkins, Sorin V. Dusan, Vasu Iyengar, Tarun Pruthi, Lalin S. Theverapperuma
  • Publication number: 20190253785
    Abstract: An automatic speech recognition (ASR) triggering system, and a method of providing an ASR trigger signal, is described. The ASR triggering system can include a microphone to generate an acoustic signal representing an acoustic vibration and an accelerometer worn in an ear canal of a user to generate a non-acoustic signal representing a bone conduction vibration. A processor of the ASR triggering system can receive an acoustic trigger signal based on the acoustic signal and a non-acoustic trigger signal based on the non-acoustic signal, and combine the trigger signals to gate an ASR trigger signal. For example, the ASR trigger signal may be provided to an ASR server only when the trigger signals are simultaneously asserted. Other embodiments are also described and claimed.
    Type: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Inventors: Sorin V. Dusan, Aram M. Lindahl, Robert D. Watson
  • Publication number: 20190220069
    Abstract: An electronic device that can be worn on a limb of a user can include a processing device and one or more position sensing devices operatively connected to the processing device. The processing device can be adapted to determine which limb of the user is wearing the electronic device based on one or more signals received from at least one position sensing device.
    Type: Application
    Filed: March 27, 2019
    Publication date: July 18, 2019
    Inventor: Sorin V. Dusan
  • Patent number: 10341759
    Abstract: Method of wind and noise reduction for headphones starts by receiving acoustic signals from first external microphone included on the outside of earcup's housing. Acoustic signals are received from internal microphone included inside earcup's housing. ANC downlink corrector processes downlink signal to generate echo estimate of speaker signal. First summator removes echo estimate of speaker signal from acoustic signals from internal microphone to generate corrected internal microphone signal. Spectral combiner performs spectral mixing of corrected internal microphone signal with acoustic signals from first external microphone to generate mixed signal. Lower frequency portion of mixed signal includes corresponding lower frequency portion of corrected internal microphone signal, and higher frequency portion of mixed signal includes corresponding higher frequency portion of acoustic signals from first external microphone. Other embodiments are also described.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: July 2, 2019
    Assignee: Apple Inc.
    Inventors: Sorin V. Dusan, Tom-Davy W. Saux, Vladan Bajic
  • Patent number: 10339949
    Abstract: Speech enhancers suppress impairments in an acoustic signal. An audio appliance has a first microphone and a second microphone. The first microphone provides a first signal, and the second microphone provides a second signal. A voice-activity detector can determine a presence of user speech responsive to a combination of voice-activity cues, including a first level difference between the first signal and the second signal within a first frequency band, and a second level difference between the first signal and the second signal within a second frequency band. A noise suppressor suppresses impairments originating from a direction of, e.g., up to about 75-degrees from an axis extending from the second microphone to the first microphone. An output device can output a noise-suppressed output-signal corresponding to a determined presence or absence of speech by the voice-activity detector. The impairments can be suppressed by, e.g., between about 3 dB and about 20 dB.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 2, 2019
    Assignee: Apple Inc.
    Inventor: Sorin V. Dusan
  • Publication number: 20190189144
    Abstract: Speech enhancers suppress impairments in an acoustic signal. An audio appliance has a first microphone and a second microphone. The first microphone provides a first signal, and the second microphone provides a second signal. A voice-activity detector can determine a presence of user speech responsive to a combination of voice-activity cues, including a first level difference between the first signal and the second signal within a first frequency band, and a second level difference between the first signal and the second signal within a second frequency band. A noise suppressor suppresses impairments originating from a direction of, e.g., up to about 75-degrees from an axis extending from the second microphone to the first microphone. An output device can output a noise-suppressed output-signal corresonding to a determined presence or absence of speech by the voice-activity detector. The impairments can be suppressed by, e.g., between about 3 dB and about 20 dB.
    Type: Application
    Filed: December 19, 2017
    Publication date: June 20, 2019
    Inventor: Sorin V. Dusan
  • Patent number: 10313782
    Abstract: An automatic speech recognition (ASR) triggering system, and a method of providing an ASR trigger signal, is described. The ASR triggering system can include a microphone to generate an acoustic signal representing an acoustic vibration and an accelerometer worn in an ear canal of a user to generate a non-acoustic signal representing a bone conduction vibration. A processor of the ASR triggering system can receive an acoustic trigger signal based on the acoustic signal and a non-acoustic trigger signal based on the non-acoustic signal, and combine the trigger signals to gate an ASR trigger signal. For example, the ASR trigger signal may be provided to an ASR server only when the trigger signals are simultaneously asserted. Other embodiments are also described and claimed.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: June 4, 2019
    Assignee: Apple Inc.
    Inventors: Sorin V. Dusan, Aram M. Lindahl, Robert D. Watson
  • Patent number: 10303436
    Abstract: An assistive apparatus, and a method of providing an accessibility switch output by the assistive apparatus, is described. The assistive apparatus may include an accelerometer to be worn in an ear canal of a user, and a display having a graphical user interface. The accelerometer may generate an input signal representing an input command made by the user, and more particularly, the generated input command may represent one or more hums transmitted from vocal cords of the user to the accelerometer in the ear canal via bone conduction. The assistive apparatus may provide an accessibility switch output in response to the input signals representing the input command. For example, the accessibility switch output may cause a selection of a user interface element of the graphical user interface. Other embodiments are also described and claimed.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: May 28, 2019
    Assignee: Apple Inc.
    Inventors: Sorin V. Dusan, Aram M. Lindahl
  • Patent number: 10254804
    Abstract: An electronic device that can be worn on a limb of a user can include a processing device and one or more position sensing devices operatively connected to the processing device. The processing device can be adapted to determine which limb of the user is wearing the electronic device based on one or more signals received from at least one position sensing device.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: April 9, 2019
    Assignee: Apple Inc.
    Inventor: Sorin V. Dusan
  • Patent number: 10176823
    Abstract: Electronic system for audio noise processing and noise reduction comprises: first and second noise estimators, selector and attenuator. First noise estimator processes first audio signal from voice beamformer (VB) and generate first noise estimate. VB generates first audio signal by beamforming audio signals from first and second audio pick-up channels. Second noise estimator processes first and second audio signal from noise beamformer (NB), in parallel with first noise estimator and generates second noise estimate. NB generates second audio signal by beamforming audio signals from first and second audio pick-up channels. First and second audio signals include frequencies in first and second frequency regions. Selector's output noise estimate may be a) second noise estimate in the first frequency region, and b) first noise estimate in the second frequency region. Attenuator attenuates first audio signal in accordance with output noise estimate. Other embodiments are also described.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: January 8, 2019
    Assignee: Apple Inc.
    Inventors: Sorin V. Dusan, Aram M. Lindahl, Alexander Kanaris, Vasu Iyengar
  • Publication number: 20180344189
    Abstract: A wearable device configured to acquire and process electrocardiographic measurements, detect lead inversion and correct the acquired measurements for lead inversion is provided. In one example, the wearable device can detect lead inversion by first assessing whether the P-wave of a given electrocardiographic measurement has a negative amplitude, and if the P-wave is found to be negative, the device can determine if the magnitude of the R-wave is smaller than the maximum of the magnitudes of the S-wave and the Q-wave. In another example, the device can be put through an enrollment procedure in which electrocardiographic measurements are taken with the device being worn at known locations on the body. Once the enrollment procedure is completed, when the device is being used, any electrocardiographic results obtained can be compared against the measurements taken during the enrollment phase, and the location of the device on the body can be determined.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 6, 2018
    Inventor: Sorin V. DUSAN
  • Publication number: 20180343514
    Abstract: Method of wind and noise reduction for headphones starts by receiving acoustic signals from first external microphone included on the outside of earcup's housing. Acoustic signals are received from internal microphone included inside earcup's housing. ANC downlink corrector processes downlink signal to generate echo estimate of speaker signal. First summator removes echo estimate of speaker signal from acoustic signals from internal microphone to generate corrected internal microphone signal. Spectral combiner performs spectral mixing of corrected internal microphone signal with acoustic signals from first external microphone to generate mixed signal. Lower frequency portion of mixed signal includes corresponding lower frequency portion of corrected internal microphone signal, and higher frequency portion of mixed signal includes corresponding higher frequency portion of acoustic signals from first external microphone. Other embodiments are also described.
    Type: Application
    Filed: May 26, 2017
    Publication date: November 29, 2018
    Inventors: Sorin V. Dusan, Tom-Davy W. Saux, Vladan Bajic
  • Publication number: 20180324518
    Abstract: An automatic speech recognition (ASR) triggering system, and a method of providing an ASR trigger signal, is described. The ASR triggering system can include a microphone to generate an acoustic signal representing an acoustic vibration and an accelerometer worn in an ear canal of a user to generate a non-acoustic signal representing a bone conduction vibration. A processor of the ASR triggering system can receive an acoustic trigger signal based on the acoustic signal and a non-acoustic trigger signal based on the non-acoustic signal, and combine the trigger signals to gate an ASR trigger signal. For example, the ASR trigger signal may be provided to an ASR server only when the trigger signals are simultaneously asserted. Other embodiments are also described and claimed.
    Type: Application
    Filed: May 4, 2017
    Publication date: November 8, 2018
    Inventors: Sorin V. Dusan, Aram M. Lindahl, Robert D. Watson
  • Publication number: 20180324514
    Abstract: System for automatic right-left ear detection for headphone comprising: first earcup and second earcup that are identical. Each of first and second earcups includes: first microphone located on perimeter of each earcup, when first earcup is worn on user's right ear first microphone of first earcup is at location farthest from user's mouth when headphone is worn in normal wear position; second microphone located on perimeter of each earcup, when first earcup is worn on user's right ear, second microphone of first earcup is at location closer than first microphone of first earcup to user's mouth; third microphone located inside each earcup facing user's ear cavity, fourth microphone located at perimeter and bottom center portion of each earcup and facing exterior of each earcup, and fifth microphone located on perimeter of each earcup above and to left of second microphone when looking at outside housing of each earcup.
    Type: Application
    Filed: May 5, 2017
    Publication date: November 8, 2018
    Inventor: Sorin V. Dusan
  • Patent number: 10045708
    Abstract: A wearable device configured to acquire and process electrocardiographic measurements, detect lead inversion and correct the acquired measurements for lead inversion is provided. In one example, the wearable device can detect lead inversion by first assessing whether the P-wave of a given electrocardiographic measurement has a negative amplitude, and if the P-wave is found to be negative, the device can determine if the magnitude of the R-wave is smaller than the maximum of the magnitudes of the S-wave and the Q-wave. In another example, the device can be put through an enrollment procedure in which electrocardiographic measurements are taken with the device being worn at known locations on the body. Once the enrollment procedure is completed, when the device is being used, any electrocardiographic results obtained can be compared against the measurements taken during the enrollment phase, and the location of the device on the body can be determined.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: August 14, 2018
    Assignee: Apple Inc.
    Inventor: Sorin V. Dusan
  • Publication number: 20180199138
    Abstract: Systems, methods, devices and non-transitory, computer-readable storage mediums are disclosed for location-tracking wireless devices. In an embodiment, a method performed by an electronic device comprises: playing, or initiating the playing of, a sound through a loudspeaker of an accessory device via a communication link. The sound is played at a specified frequency that utilizes a frequency response of the loudspeaker (or loudspeaker plus speaker enclosure). The sound is received through two or more microphones of the electronic device and filtered by one or more filters. The one or more filters are configured to pass the sound at or around the specified frequency and to reduce masking of the sound by ambient noise. The filtered sound is associated with direction data generated from sensor data provided by one or more inertial sensors of the electronic device. In another embodiment, the specified frequency is higher than the maximum human hearing range.
    Type: Application
    Filed: September 29, 2017
    Publication date: July 12, 2018
    Applicant: Apple Inc.
    Inventors: Sorin V. Dusan, Raghunandan K. Pai, Scott Lopatin, Tommy Rochette, Navin Bindiganavile Suparna, Emmanuel Lalande, Siva Ganesh Movva, Robert Watson, Scott Grinker
  • Patent number: 9997173
    Abstract: A method performing automatic gain control (AGC) using an accelerometer in a headset starts with an accelerometer-based voice activity detector (VADa) generating a VADa output based on (i) acoustic signals received from at least one microphone included in a pair of earbuds and (ii) data output by at least one accelerometer that is included in the pair of earbuds. The at least one accelerometer detects vibration of the user's vocal chords. The headset includes the pair of earbuds. An AGC controller then performs automatic gain control (AGC) on the acoustic signals from the at least one microphone based on the VADa output. Other embodiments are also described.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: June 12, 2018
    Assignee: APPLE INC.
    Inventors: Sorin V. Dusan, Baptiste Paquier, Aram Lindahl, Dubravko Biruski
  • Patent number: 9966067
    Abstract: Digital signal processing techniques for automatically reducing audible noise from a sound recording that contains speech. A noise suppression system uses two types of noise estimators, including a more aggressive one and less aggressive one. Decisions are made on how to select or combine their outputs into a usable noise estimate in a different speech and noise conditions. A 2-channel noise estimator is described. Other embodiments are also described and claimed.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: May 8, 2018
    Assignee: Apple Inc.
    Inventors: Vasu Iyengar, Sorin V. Dusan