Patents Assigned to Dolby Laboratories Licensing Corporation
  • Patent number: 9980073
    Abstract: A method and apparatus for decompressing a Higher Order Ambisonics (HOA) signal representation is disclosed. The apparatus includes an input interface that receives an encoded directional signal and an encoded ambient signal and an audio decoder that perceptually decodes the encoded directional signal and encoded ambient signal to produce a decoded directional signal and a decoded ambient signal, respectively. The apparatus further includes an extractor for obtaining side information related to the directional signal and an inverse transformer for converting the decoded ambient signal from a spatial domain to an HOA domain representation of the ambient signal. The apparatus also includes a synthesizer for recomposing a Higher Order Ambisonics (HOA) signal from the HOA domain representation of the ambient signal and the decoded directional signal. The side information includes a direction of the directional signal selected from a set of uniformly spaced directions.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: May 22, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexander Krüger, Sven Kordon, Johannes Boehm, Johann-Markus Batke
  • Patent number: 9979963
    Abstract: Embodiments of the present invention relate to methods and systems for ordering, communicating and applying pixel intra-prediction modes.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: May 22, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Louis J. Kerofsky
  • Patent number: 9979369
    Abstract: An audio peak limiter apparatus which calculates a smoothed sequence of gains for application to a sequence of blocks of samples of an audio signal. The apparatus sometimes calculates a candidate gain, to replace a too-large smoothed gain, such that applying the candidate gain would produce no scaled sample whose magnitude exceeds a predetermined limit. The apparatus sometimes calculates and stores a final gain to replace the too-large smoothed gain (where the final gain can be obtained e.g. by dividing the to-be-replaced smoothed gain by a prior smoothed gain and multiplying the result by the corresponding prior final gain), if it is determined that the candidate gain is not less than the immediately previous final gain.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: May 22, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Nicholas Luke Appleton, Christopher Mark Tubb, William Thomas Rowley, Imankalyan Mukherjee
  • Patent number: 9979829
    Abstract: Embodiments are described for a soundfield system that receives a transmitting soundfield, wherein the transmitting soundfield includes a sound source at a location in the transmitting soundfield. The system determines a rotation angle for rotating the transmitting soundfield based on a desired location for the sound source. The transmitting soundfield is rotated by the determined angle and the system obtains a listener's soundfield based on the rotated transmitting soundfield. The listener's soundfield is transmitted for rendering to a listener.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: May 22, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Richard J. Cartwright
  • Patent number: 9979366
    Abstract: The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment. The invention includes not only methods but also corresponding computer programs and apparatus.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: May 22, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Alan Jeffrey Seefedlt
  • Publication number: 20180139537
    Abstract: Example embodiments disclosed herein relate to separated audio analysis and processing. A system for processing an audio signal is disclosed. The system includes an audio analysis module configured to analyze an input audio signal to determine a processing parameter for the input audio signal, the input audio signal being represented in time domain. The system also includes an audio processing module configured to process the input audio signal in parallel with the audio analysis module. The audio processing module includes a time domain filter configured to filter the input audio signal to obtain an output audio signal in the time domain, and a filter controller configured to control a filter coefficient of the time domain filter based on the processing parameter determined by the audio analysis module. Corresponding method and computer program product of processing an audio signal are also disclosed.
    Type: Application
    Filed: May 26, 2016
    Publication date: May 17, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Dong SHI, Xuejing SUN
  • Publication number: 20180139566
    Abstract: Some implementations may involve receiving, via an interface system, personnel location data indicating a location of at least one person and receiving, from an orientation system, headset orientation data corresponding with the orientation of a headset. First environmental element location data, indicating a location of at least a first environmental element, may be determined. Based at least in part on the headset orientation data, the personnel location data and the first environmental element location data, headset coordinate locations of at least one person and at least the first environmental element in a headset coordinate system corresponding with the orientation of the headset may be determined. An apparatus may be caused to provide spatialization indications of the headset coordinate locations. Providing the spatialization indications may involve controlling a speaker system to provide environmental element sonification corresponding with at least the first environmental element location data.
    Type: Application
    Filed: April 22, 2016
    Publication date: May 17, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Poppy Anne Carrie CRUM
  • Publication number: 20180139535
    Abstract: Methods and systems for generating an audio mix indicative of action sound captured at an event on a surface (e.g., a sporting event on a field) using a microphone array, where the array includes subsurface microphones (e.g., a large number of sub-surface microphones) positioned under the surface, and optionally also other microphones. In typical embodiments, at least one point of interest (“PI”) on the surface is selected in an automated manner, PI data indicative of a currently selected PI on the surface is generated (e.g., a sequence of PIs on the surface is selected, the PI data is indicative of the sequence of PIs, and a most recently selected PI in the sequence is the currently selected PI), and the audio mix is generated in response to the PI data. Aspects include methods performed by any embodiment of the system, and a system or device configured (e.g., programmed) to perform any embodiment of the method.
    Type: Application
    Filed: April 8, 2016
    Publication date: May 17, 2018
    Applicants: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Giulio CENGARLE, Antonio MATEOS SOLE, Natanael David OLAIZ, Kenneth Robert HONOLD
  • Patent number: 9973762
    Abstract: Embodiments of the present invention relate to methods and systems for ordering, communicating and applying pixel intra-prediction modes.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: May 15, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Louis J. Kerofsky
  • Patent number: 9973208
    Abstract: A method and a device for arithmetic encoding of a current spectral coefficient using preceding spectral coefficients. The method comprises processing the preceding spectral coefficients, using the processed preceding spectral coefficients for determining a context class being one of at least two different context classes, using the determined context class and a mapping from the at least two different context classes to at least two different probability density functions for determining the probability density function, and arithmetic encoding the current spectral coefficient based on the determined probability density function wherein processing the preceding spectral coefficients comprises non-uniformly quantizing absolutes of the preceding spectral coefficients for use in determining of the context class.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: May 15, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Oliver Wuebbolt
  • Patent number: 9973771
    Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: May 15, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Purvin Bibhas Pandit, Peng Yin, Dong Tian
  • Patent number: 9973779
    Abstract: A sequence of 3D VDR images and 3D SDR images are encoded using a monoscopic SDR base layer and one or more enhancement layers. A first VDR view and a first SDR view are encoded with a DVDL encoder to output first and second coded signals. A predicted 3D VDR signal is generated, which has first and second predicted VDR views. First and second VDR residuals are generated based on their respective VDR views and predicted VDR views. A DVDL encoder encodes the first and second VDR residuals to output third and fourth coded signals. A 3D VDR decoder, which has two DVDL decoders and SDR-to-VDR predictors use the four coded input signals to generate a single-view SDR, 3D SDR, single-view VDR, or 3D VDR signals. A corresponding decoder is also described, which is capable of decoding these encoded 3D VDR and SDR images.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: May 15, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Konstantinos Konstantinides, Tyrome Y. Brown
  • Publication number: 20180131938
    Abstract: In a method to improve the coding efficiency of high-dynamic range images coded in a perceptually quantized IPT color space (IPT-PQ), the values of the chroma components (P/T) of an input signal in IPT-PQ color space are divided by a factor of two before being encoded with standard-based encoders, such as AVC or HEVC; thus better matching the covariance characteristics of YCbCr signals. In addition, the order of the P and T chroma components may be swapped and the sign of the T chroma component may be inverted. Color transformation matrices for efficient forward and backward reshaping in the IPT-PQ color space are provided.
    Type: Application
    Filed: April 19, 2016
    Publication date: May 10, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Taoran LU, Fangjun PU, Peng YIN, Tao CHEN
  • Publication number: 20180130188
    Abstract: A highlight mask is generated for an image to identify one or more highlights in the image. One or more highlight classifiers are determined for the one or more highlights in the image. One or more highlight gains are applied with the highlight mask to luminance amplitudes of pixels in the one or more highlights in the image to generate a scaled image. The one or more high-light gains for the one or more highlights are determined based at least in part on the one or more highlight classifiers determined for the one or more highlights.
    Type: Application
    Filed: April 26, 2016
    Publication date: May 10, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Suzanne FARRELL, Scott DALY, Timo KUNKEL
  • Publication number: 20180130479
    Abstract: An audio communication endpoint receives a bitstream containing spectral components representing spectral content of an audio signal, wherein the spectral components relate to a first range extending up to a first break frequency, above which any spectral components are unassigned. The endpoint adapts the received bitstream in accordance with a second range extending up to a second break frequency by removing moving spectral components or adding neutral-valued spectral components relating to a range between the first and second break frequencies. The endpoint then attenuates spectral content in a neighbourhood of the least of the first and second break frequencies for thereby achieving a gradual spectral decay. After this, reconstructing the audio signal is reconstructed by an inverse transform operating on spectral components relating to said second range in the adapted and attenuated received bitstream.
    Type: Application
    Filed: January 10, 2018
    Publication date: May 10, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Heiko PURNHAGEN, Leif SEHLSTROM, Lars VILLEMOES, Glenn N. DICKINS, Mark S. VINTON
  • Publication number: 20180132038
    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: Application
    Filed: November 3, 2017
    Publication date: May 10, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. DICKINS, Dong SHI, Andrew BORDER, David GUNAWAN
  • Patent number: 9966916
    Abstract: The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment. The invention includes not only methods but also corresponding computer programs and apparatus.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: May 8, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Alan Jeffrey Seefeldt
  • Patent number: 9964803
    Abstract: Light sources of a backlight are configured to customize the shape of light emitted from the clusters. The clusters are activated as a unit and modulated as to brightness, but of the customized shape. All clusters can have a similar customized PSF, or the customization of each cluster may be varied in real time. Real time changes of a clusters PSF may be based, for example, an image or a region of the image to be displayed using the clusters.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: May 8, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Damir Wallener
  • Patent number: 9967599
    Abstract: In an embodiment, a media source combines reference code values and mapping function parameters for mapping functions into video frames originally designated to carry pixel values. The video frames are delivered to a downstream device such as a media sink in an encoded video signal. The media sink extracts the mapping function parameters for the mapping functions from the encoded video signal and applies the mapping functions as a part of display management operations to map the reference code values to the mapped pixel values appropriate for the media sink. The mapped pixel values can be used to render images as represented by the reference code values.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: May 8, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sheng Qu, Ailan Hu, Gopi Lakshminarayan, David Brooks
  • Patent number: 9967666
    Abstract: Example embodiments disclosed herein relate to audio content rendering. A method of rendering audio content is disclosed, which includes determining a priority level for an audio object in the audio content, selecting a rendering mode from a plurality of rendering modes for the audio object based on the determined priority level and rendering the audio object in accordance with the selected rendering mode, the rendering mode indicating an accuracy of the rendered audio object. Corresponding system and computer program product are also disclosed.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: May 8, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Christof Fersch, Freddie Sanchez