Patents by Inventor David Gunawan

David Gunawan 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).

  • Publication number: 20190392855
    Abstract: In an audio processing system (300), a filtering section (350, 400): receives subband signals (410, 420, 430) corresponding to audio content of a reference signal (301) in respective frequency subbands; receives subband signals (411, 421, 431) corresponding to audio content of a response signal (304) in the respective subbands; and forms filtered inband references (412, 422, 432) by applying respective filters (413, 423, 433) to the subband signals of the reference signal.
    Type: Application
    Filed: September 9, 2019
    Publication date: December 26, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Dong SHI, Glenn N. DICKINS, David GUNAWAN, Xuejing SUN
  • Patent number: 10504530
    Abstract: A method of processing data comprises processing first frequency-domain audio or video data using signal processing of a first type, and transforming the processed first frequency-domain audio or video data to processed time-domain audio or video data using a transform which is the inverse of the first transform, and transforming the processed time-domain audio or video data using a second transform which is matched to a second type of signal processing. The method further comprises identifying time-domain audio or video data for which signal processing of the first type, after transformation using the second transform, would yield satisfactory results. The method further comprises transforming the identified time-domain audio or video data to frequency-domain identified audio or video data using the second transform, instead of using the first transform, and processing the identified frequency-domain audio or video data using signal processing of the first type.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: December 10, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, Xuejing Sun, Glenn N. Dickins, David Gunawan
  • Patent number: 10504501
    Abstract: Described herein is a method and audio capture system for suppressing noise due to mechanical disturbances in an audio capture system. In one embodiment a method includes the steps of: a) receiving an input audio signal from a microphone; b) receiving an input reference signal separate from the input audio signal; c) processing the input reference signal to generate a control signal for identifying a noise event; d) in response to the control signal, estimating a contribution of the noise event to the input audio signal by applying an adaptive filter to a sliding temporal window of the control signal in the frequency domain; and e) based on the estimated contribution, selectively modifying the input audio signal to generate an output audio signal in which the noise arising from the noise event is at least partially suppressed.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: December 10, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. Dickins, Dong Shi, David Gunawan
  • Publication number: 20190342521
    Abstract: Systems and methods are described for determining orientation of an external audio device in a video conference, which may be used to provide congruent multimodal representation for a video conference. A camera of a video conferencing system may be used to detect a potential location of an external audio device within a room in which the video conferencing system is providing a video conference. Within the detected potential location, a visual pattern associated with the external audio device may be identified. Using the identified visual pattern, the video conferencing system may estimate an orientation of the external audio device, the orientation being used by the video conferencing system to provide spatial audio video congruence to a far end audience.
    Type: Application
    Filed: July 22, 2019
    Publication date: November 7, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Erwin GOESNAR, Hannes MUESCH, David GUNAWAN, Michael ECKERT, Glenn N. DICKINS
  • Patent number: 10412490
    Abstract: A method of processing a series of microphone inputs of an audio conference, the method including the steps of: (a) conducting a spatial analysis and feature extraction of the audio conference based on current audio activity; (b) aggregating historical information to obtain information about the approximate relative location of recent sound objects relative to the series of microphone inputs; (c) utilizing the relative location or distance of the sound objects from the series of microphone inputs to determine if beam forming should be utilized to enhance the audio reception from recent sound objects.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: September 10, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: David Gunawan, Glenn N. Dickins
  • Patent number: 10410653
    Abstract: In an audio processing system (300), a filtering section (350, 400): receives subband signals (410, 420, 430) corresponding to audio content of a reference signal (301) in respective frequency subbands; receives subband signals (411, 421, 431) corresponding to audio content of a response signal (304) in the respective subbands; and forms filtered inband references (412, 422, 432) by applying respective filters (413, 423, 433) to the subband signals of the reference signal.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: September 10, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, Glenn N. Dickins, David Gunawan, Xuejing Sun
  • Patent number: 10393571
    Abstract: Example embodiments disclosed herein relate to a estimation of reverberant energy components from audio sources. A method of estimating a reverberant energy component from an active audio source (100) is disclosed. The method comprises determining a correspondence between the active audio source and a plurality of sample sources by comparing one or more spatial features of the active audio source with one or more spatial features of the plurality of sample sources, each of the sample sources being associated with an adaptive filtering model (101); obtaining an adaptive filtering model for the active audio source based on the determined correspondence (102); and estimating the reverberant energy component from the active audio source over time based on the adaptive filtering model (103). Corresponding system (800) and computer program product (900) are also disclosed.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: August 27, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, David Gunawan, Glenn N. Dickins, Kai Li
  • Patent number: 10362270
    Abstract: Systems and methods are described for determining orientation of an external audio device in a video conference, which may be used to provide congruent multimodal representation for a video conference. A camera of a video conferencing system may be used to detect a potential location of an external audio device within a room in which the video conferencing system is providing a video conference. Within the detected potential location, a visual pattern associated with the external audio device may be identified. Using the identified visual pattern, the video conferencing system may estimate an orientation of the external audio device, the orientation being used by the video conferencing system to provide spatial audio video congruence to a far end audience.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: July 23, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Erwin Goesnar, Hannes Muesch, David Gunawan, Michael Eckert, Glenn N. Dickins
  • Patent number: 10334362
    Abstract: Systems and methods are described for analyzing and resolving feedback caused by having multiple audio links in a conference room. An audio system may detect the presence of duplicated audio caused by multiple audio links in the conference room. Marker signals may be injected into the conference room or over the network in response to detecting the duplicated audio. Echoes of the marker signals may be received, and the system may determine which case corresponds to the detected duplicated audio based on the received echo of the marker signals. Based on the determined case, operation of at least one of the speaker and the microphone may be modified. After the modification, audio playback in the conference room may be monitored to verify that far end audio playback is taking place and that the duplicated audio has been resolved.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: June 25, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. Dickins, Dong Shi, Andrew Border, David Gunawan
  • Patent number: 10319391
    Abstract: Example embodiments disclosed herein relate to impulsive noise suppression. A method of impulsive noise suppression in an audio signal is disclosed. The method includes determining an impulsive noise related feature from a current frame of the audio signal. The method also includes detecting an impulsive noise in the current frame based on the impulsive noise related feature, and in response to detecting the impulsive noise in the current frame, applying a suppression gain to the current frame to suppress the impulsive noise. Corresponding system and computer program product of impulsive noise suppression in an audio signal are also disclosed.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: June 11, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: David Gunawan, Dong Shi, Glenn N. Dickins
  • Publication number: 20190156852
    Abstract: Methods for echo estimation or echo management (echo suppression or cancellation) on an input audio signal, with at least one of adaptation of a sparse prediction filter set, modification (for example, truncation) of adapted prediction filter impulse responses, generation of a composite impulse response from adapted prediction filter impulse responses, or use of echo estimation and/or echo management resources in a manner determined at least in part by classification of the input audio signal as being (or not being) echo free. Other aspects are systems configured to perform any embodiment of any of the methods.
    Type: Application
    Filed: June 7, 2017
    Publication date: May 23, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Dong SHI, Kai LI, Hannes MUESCH, David GUNAWAN, Paul HOLMBERG, Glenn N. DICKINS
  • Publication number: 20190088264
    Abstract: A sound processing system operative to measure the level of diffusivity of the sounds present in the input sound signal. The system includes a plurality of input channels for receiving audio signals from an audio scene, the audio scene comprising at least one target sound in the presence of background noise. A diffusivity measurement unit is included so as to be operably coupled to the plurality of input channels to receive the audio signals therefrom and measure a level of diffusivity of the sounds present therein. A leveler unit is operably coupled to the plurality of input channels for receiving the audio signals therefrom and for applying a gain to the audio signals to minimize variations in the audio signal levels. A controller is operably coupled to the diffusivity measurement unit and the leveler unit to control the gain applied to the audio signals by the leveler unit based on the level of diffusivity of the sounds present therein.
    Type: Application
    Filed: February 15, 2017
    Publication date: March 21, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: David GUNAWAN, Chunjian LI
  • Publication number: 20190066654
    Abstract: Described herein is a method and audio capture system for suppressing noise due to mechanical disturbances in an audio capture system. In one embodiment a method includes the steps of: a) receiving an input audio signal from a microphone; b) receiving an input reference signal separate from the input audio signal; c) processing the input reference signal to generate a control signal for identifying a noise event; d) in response to the control signal, estimating a contribution of the noise event to the input audio signal by applying an adaptive filter to a sliding temporal window of the control signal in the frequency domain; and e) based on the estimated contribution, selectively modifying the input audio signal to generate an output audio signal in which the noise arising from the noise event is at least partially suppressed.
    Type: Application
    Filed: February 2, 2017
    Publication date: February 28, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. DICKINS, Dong SHI, David GUNAWAN
  • Publication number: 20190058944
    Abstract: A method of processing a series of microphone inputs of an audio conference, the method including the steps of: (a) conducting a spatial analysis and feature extraction of the audio conference based on current audio activity; (b) aggregating historical information to obtain information about the approximate relative location of recent sound objects relative to the series of microphone inputs; (c) utilising the relative location or distance of the sound objects from the series of microphone inputs to determine if beam forming should be utilised to enhance the audio reception from recent sound objects.
    Type: Application
    Filed: February 23, 2017
    Publication date: February 21, 2019
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: David GUNAWAN, Glenn N. DICKINS
  • Publication number: 20190045312
    Abstract: Described herein are audio capture systems and methods. One embodiment provides an audio capture system (1) including: microphones (9-11) positioned to capture respective audio signals from different directions or locations within an audio environment; a mixing module (7) configured to mix the audio signals in accordance with a mixing control signal to produce an output audio mix, wherein, upon the detection of vibration activity, the mixing control signal controls the mixing module (7) to selectively temporarily modify one or more of the audio signals to reduce the presence of noise associated with vibration activity in the output audio mix.
    Type: Application
    Filed: February 16, 2017
    Publication date: February 7, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: David GUNAWAN, Glenn N. DICKINS
  • Publication number: 20190045315
    Abstract: A method for interactive and user guided manipulation of multichannel audio content, the method including the steps of: providing a content preview facility for replay and review of multichannel audio content by a user; providing a user interface for the user selection of a segment of multichannel audio content having an unsatisfactory audio content; processing the audio content to include associated audio object activity spatial or signal space regions, to create a time line of activity where one or more spatial or signal space regions are active at any given time; matching the user's gesture input against at least one of the active spatial or signal space regions; signal processing the audio emanating from selected active spatial or signal space region using a number of differing techniques to determine at least one processed alternative; providing the user with an interactive playback facility to listen to the processed alternative.
    Type: Application
    Filed: February 9, 2017
    Publication date: February 7, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. DICKINS, David GUNAWAN
  • Publication number: 20180374496
    Abstract: Example embodiments disclosed herein relate to audio signal processing. A method of processing an audio signal is disclosed. The method includes detecting, based on a power distribution of the audio signal, a type of content of a frame of the audio signal, generating a first gain based on a sound level of the frame for adjusting the sound level, processing the audio signal by applying the first gain to the frame; and in response to the type of content being detected to be a breath sound, generating a second gain for mitigating the breath sound and processing the audio signal by applying the second gain to the frame. Corresponding system and computer program product are also disclosed.
    Type: Application
    Filed: December 15, 2016
    Publication date: December 27, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Dong SHI, David GUNAWAN, Glenn N. DICKINS
  • Publication number: 20180366136
    Abstract: Example embodiments disclosed herein relate to audio signal processing. A method of indicating a presence of a nuisance in an audio signal is disclosed. The method includes determining a probability of the presence of the nuisance in a frame of the audio signal based on a feature of the audio signal, the nuisance representing an unwanted sound made by a user, in response to the probability of the presence of the nuisance exceeding a threshold, tracking the audio signal based on a metric over a plurality of frames following the frame, determining, based on the tracking, that the presence of the nuisance is to be indicated to the user, and in response to the determination, presenting to the user a notification of the presence of the nuisance. Corresponding system and computer program product are also disclosed.
    Type: Application
    Filed: December 14, 2016
    Publication date: December 20, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, David Gunawan, Glenn N. Dickins
  • Patent number: 10142731
    Abstract: Systems and methods are described for dynamically suppressing non-linear distortion for a device, such as a speakerphone. A device may receive a signal, where the device has non-linear distortion at a predetermined frequency. The received signal may be analyzed to compute a tone strength parameter and a band level. The received signal may be filtered such that a spectrum of the input signal is dynamically limited by reducing suppression of the non-linear distortion when the tone strength parameter is in a lower portion of a predetermined range and increasing suppression of the non-linear distortion when the tone strength parameter is in an upper portion of the predetermined range, the predetermined range of the tone strength parameter corresponding to a loudness range of the device.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: November 27, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Erwin Goesnar, David Gunawan
  • Patent number: 10142484
    Abstract: In an audio conferencing environment, including multiple users participating by means of a series of associated audio input devices for the provision of audio input, and a series of audio output devices for the output of audio output streams to the multiple users, with the audio input and output devices being interconnected to a mixing control server for the control and mixing of the audio inputs from each audio input devices to present a series of audio streams to the audio output devices, a method of reducing the effects of cross talk pickup of at least a first audio conversation by multiple audio input devices, the method including the steps of: (a) monitoring the series of audio input devices for the presence of a duplicate audio conversation input from at least two input audio sources in an audio output stream; and (b) where a duplicate audio conversation input is detected, suppressing the presence of the duplicate audio conversation input in the audio output stream.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: November 27, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Gary Spittle, Glenn Dickins, David Gunawan, Guilin Ma