Dolby Labs Patents

Dolby Laboratories, Inc. licenses its audio technologies, including its noise-reduction systems, to the media industry. Its product portfolio includes Dolby Digital Plus (DD+), Dolby Digital (DD), AAC and HE-AAC, Dolby TrueHD, Dolby Atmos, Dolby AC-4, Dolby Voice and Dolby Vision. Products that incorporate Dolby technologies include televisions, set-top boxes, computers, DVD and Blu-ray devices, soundbars, smartphones, tablets, video game consoles, and automobile entertainment systems.

Dolby Labs Patents by Type

  • Patent number: 9794718
    Abstract: Embodiments are described for rendering spatial audio content through a system that is configured to reflect audio off of one or more surfaces of a listening environment. The system includes an array of audio drivers distributed around a room, wherein at least one driver of the array of drivers is configured to project sound waves toward one or more surfaces of the listening environment for reflection to a listening area within the listening environment and a renderer configured to receive and process audio streams and one or more metadata sets that are associated with each of the audio streams and that specify a playback location in the listening environment.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: October 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Spencer Hooks, Alan Seefeldt, Joshua B. Lando, C. Phillip Brown, Sripal S. Mehta, Stewart Murrie
  • Patent number: 9792919
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: October 17, 2017
    Assignee: Dolby International AB
    Inventors: Fredrik Henn, Kristofer Kjoerling, Lars G. Liljeryd, Karl Jonas Roeden, Jonas Engdegard
  • Patent number: 9794712
    Abstract: A method of decomposing a matrix of dimension L-by-N, where L is less than or equal to N, into a sequence of N-by-N unit primitive matrices and a permutation matrix comprising a sequence that is the product of the primitive matrices and the permutation matrix, containing L rows that are substantially close to the provided L-by-N matrix, where the choice of the permutation matrix and the indices of the non-trivial rows in the primitive matrices are chosen to limit the coefficient values in the primitive matrices.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: October 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Vinay Melkote, Malcolm James Law
  • Patent number: 9792915
    Abstract: An apparatus for processing an input audio signal relies on a cascade of filterbanks, the cascade having a synthesis filterbank for synthesizing an audio intermediate signal from the input audio signal, the input audio signal being represented by a plurality of first subband signals generated by an analysis filterbank, wherein a number of filterbank channels of the synthesis filterbank is smaller than a number of channels of the analysis filterbank. The apparatus furthermore has a further analysis filterbank for generating a plurality of second subband signals from the audio intermediate signal, wherein the further analysis filterbank has a number of channels being different from the number of channels of the synthesis filterbank, so that a sampling rate of a subband signal of the plurality of second subband signals is different from a sampling rate of a first subband signal of the plurality of first subband signals.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: October 17, 2017
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Dolby International AB
    Inventors: Lars Villemoes, Per Ekstrand, Sascha Disch, Frederik Nagel, Stephan Wilde
  • Patent number: 9794713
    Abstract: When compressing an HOA data frame representation, a gain control (15, 151) is applied for each channel signal before it is perceptually encoded (16). The gain values are transferred in a differential manner as side information. However, for starting decoding of such streamed compressed HOA data frame representation absolute gain values are required, which should be coded with a minimum number of bits. For determining such lowest integer number (?e) of bits the HOA data frame representation (C(k)) is rendered in spatial domain to virtual loudspeaker signals lying on a unit sphere, followed by normalization of the HOA data frame representation (C(k)). Then the lowest integer number of bits is set to (AA).
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: October 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger
  • Patent number: 9794564
    Abstract: The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: October 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Walter C. Gish, Christopher J. Vogt
  • Patent number: 9792923
    Abstract: A method performed in an audio decoder for reconstructing an original audio signal having a lowband portion and a highband portion is disclosed. The method includes receiving an encoded audio signal and extracting reconstruction parameters from the encoded audio signal. The method further includes decoding the encoded audio signal with a core audio decoder to obtain a decoded lowband portion and regenerating the highband portion based at least in part on a cross over frequency and the decoded lowband portion to obtain a regenerated highband portion. The method also includes creating a synthetic sinusoid with a level based at least in part on a spectral envelope value for the particular subband and a noise floor value for the particular subband and adding the synthetic sinusoid to the regenerated highband portion in the particular frequency band specified by the location information.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: October 17, 2017
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Per Ekstrand, Holger Hoerich
  • Patent number: 9792924
    Abstract: When compressing an HOA data frame representation, a gain control (15, 151) is applied for each channel signal before it is perceptually encoded (16). The gain values are transferred in a differential manner as side information. However, for starting decoding of such streamed compressed HOA data frame representation absolute gain values are required, which should be coded with a minimum number of bits. For determining such lowest integer number {? e) of bits the HOA data frame representation (C(k)) is rendered in spatial domain to virtual loudspeaker signals lying on a unit sphere, followed by normalisation of the HOA data frame representation (C(k)). Then the lowest integer number of bits is set to (AA).
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: October 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexander Krueger, Sven Kordon
  • Patent number: 9794714
    Abstract: Encoding of Higher Order Ambisonics (HOA) signals commonly results in high data rates. A method for low bit-rate encoding frames of an input HOA signal having coefficient sequences comprises computing (s110) a truncated HOA representation (CT(k)), determining (s111) active coefficient sequences (IC,ACTT(k)), estimating (s16) candidate directions (MDIR(k)), dividing (s15) the input HOA signal into a plurality of frequency subbands (f1, . . . , fF), estimating (s161) for each of the frequency subbands a subset of candidate directions (MDIR(k)) as active directions (MDIR(k,f1), . . . , MDIR(k,fF)) and for each active direction a trajectory, computing (s17) for each frequency subband directional subband signals from the coefficient sequences of the frequency subband according to the active directions, calculating (s18) for each frequency subband a prediction matrix (A(k,f1), . . .
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: October 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexander Krueger, Sven Kordon
  • Publication number: 20170293202
    Abstract: Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.
    Type: Application
    Filed: June 27, 2017
    Publication date: October 12, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Gregory David MILLER, Gennady IMESHEV
  • Publication number: 20170295259
    Abstract: Methods and systems for management of cinema devices are disclosed. The cinema devices can connect to a central node even through a firewall. Once the initial connection is established, updates and commands can be sent and received, both to and from the cinema devices. An operator can connect to the central node to manage the cinema devices.
    Type: Application
    Filed: April 7, 2017
    Publication date: October 12, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Henry BARNOR, Eric Christopher CROWE, Thomas Turner PERSONS
  • Publication number: 20170295391
    Abstract: Novel methods and systems for providing an enterprise theater management system are disclosed. A remote or cloud-based enterprise theater management system uses a ruleset to uniformly control theater playlist presentation for multiple theaters in either a point of sale controlled or fully autonomous manner, including the sequencing of theater cues with the playlist clips.
    Type: Application
    Filed: April 7, 2017
    Publication date: October 12, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Dossym NURMUKHANOV, Gary Kevin HALPIN, Thomas Turner PERSONS, Henry BARNOR, Eric Christopher CROWE
  • Publication number: 20170295382
    Abstract: A processor for video coding receives a full-frame rate (FFR) HDR video signal and a corresponding FFR SDR video signal. An encoder generates a scalable bitstream that allows decoders to generate half-frame-rate (HFR) SDR, FFR SDR, HFR HDR, or FFR HDR signals. Given odd and even frames of the input FFR SDR signal, the scalable bitstream combines a base layer of coded even SDR frames with an enhancement layer of coded packed frames, where each packed frame includes a downscaled odd SDR frame, a downscaled even HDR residual frame, and a downscaled odd HDR residual frame. In an alternative implementation, the scalable bitstream combines four signals layers: a base layer of even SDR frames, an enhancement layer of odd SDR frames, a base layer of even HDR residual frames and an enhancement layer of odd HDR residual frames. Corresponding decoder architectures are also presented.
    Type: Application
    Filed: April 6, 2017
    Publication date: October 12, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Guan-Ming SU, Qian CHEN, Tao CHEN, David BROOKS, Samir N. HULYALKAR, Peng YIN
  • Patent number: 9787268
    Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: October 10, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Alan J. Seefeldt
  • Patent number: 9786286
    Abstract: A low-quality rendition of a complex soundtrack is created, synchronized and combined with the soundtrack. The low-quality rendition may be monitored in mastering operations, for example, to control the removal, replacement or addition of aural content in the soundtrack without the need for expensive equipment that would otherwise be required to render the soundtrack.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: October 10, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dossym Nurmukhanov, Sripal S. Mehta, Stanley G. Cossette, Nicolas R. Tsingos
  • Patent number: 9788012
    Abstract: Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: October 10, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Gary A. Demos
  • Patent number: 9785160
    Abstract: A protection and attenuation circuit for sensitive AC loads is described. The circuit provides AC power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an AC power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, PWM. The circuit monitors characteristics of the AC power signal driving a known load and characteristics of the load or other elements and determines the duty cycle of the pulse width modulated signal, PWM, based upon the duration and amplitude of the over-voltage, over-current, over-limit or other event.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: October 10, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Joel Butler
  • Patent number: 9786290
    Abstract: The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computational complexity. This is accomplished by means of frequency translation or folding in the subband domain, preferably integrated with spectral envelope adjustment in the same domain. The concept of dissonance guard-band filtering is further presented. The proposed invention offers a low-complexity, intermediate quality HFR method useful in speech and natural audio coding applications.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: October 10, 2017
    Assignee: Dolby International AB
    Inventors: Lars G. Liljeryd, Per Ekstrand, Fredrik Henn, Kristofer Kjoerling
  • Patent number: 9786285
    Abstract: An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information includes a parameter adjuster. The parameter adjuster is configured to receive one or more input parameters and to provide, on the basis thereof, one or more adjusted parameters. The parameter adjuster is configured to provide the one or more adjusted parameters in dependence on the one or more input parameters and the object-related parametric information, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for input parameters deviating from optimal parameters by more than a predetermined deviation.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: October 10, 2017
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Dolby International AB, Friedrich-Alexander-Universitaet Erlangen-Nuernberg
    Inventors: Juergen Herre, Andreas Hoelzer, Leonid Terentiev, Thorsten Kastner, Cornelia Falch, Heiko Purnhagen, Jonas Engdegard, Falko Ridderbusch
  • Patent number: 9787269
    Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: October 10, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Alan J. Seefeldt
  • Patent number: 9786288
    Abstract: Embodiments of the present invention relate to audio object extraction. A method for audio object extraction from audio content of a format based on a plurality of channels is disclosed. The method comprises applying audio object extraction on individual frames of the audio content at least partially based on frequency spectral similarities among the plurality of channels. The method further comprises performing audio object composition across the frames of the audio content, based on the audio object extraction on the individual frames, to generate a track of at least one audio object. Corresponding system and computer program product are also disclosed.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: October 10, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Mingqing Hu, Lie Lu, Jun Wang
  • Publication number: 20170289546
    Abstract: The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).
    Type: Application
    Filed: June 16, 2017
    Publication date: October 5, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Walter C. Gish, Christopher J. Vogt
  • Publication number: 20170289724
    Abstract: During a process, decorrelation may be selectively applied to audio data for an audio object based, at least in part, on whether a speaker for which speaker feed signals will be determined is a surround speaker. In some implementations, decorrelation may be selectively applied according to whether such a speaker is a height speaker. Some implementations may reduce, or even eliminate, audio artifacts such as comb-filter notches and peaks. Some such implementations may increase the size of a “sweet spot” of a reproduction environment.
    Type: Application
    Filed: September 10, 2015
    Publication date: October 5, 2017
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Dirk Jeroen BREEBAART, Antonio Mateos SOLE, Heiko PURNHAGEN, Nicolas R. TSINGOS
  • Publication number: 20170289357
    Abstract: Example embodiments disclosed herein relate to an evaluation of perceptual delay impact on a conversation. A method of evaluating perceptual delay impact on a conversation is disclosed. The method includes detecting a conversational event between a first participant and a second participant, the conversational event including a plurality of speech segments; in response to the conversational event being detected, obtaining at least one conversational parameter for the first and second participants, the at least one conversational parameter indicating a relationship between the plurality of speech segments in the conversational event; and determining a quality of the conversation according to a model based on the at least one conversational parameter, the model characterizing the quality with the at least one conversational parameter. A method of obtaining a model for evaluating perceptual delay impact on a conversation is also disclosed. Corresponding systems and computer program products are also disclosed.
    Type: Application
    Filed: March 30, 2017
    Publication date: October 5, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Kai LI, Doh-Suk KIM
  • Publication number: 20170289682
    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: Application
    Filed: March 29, 2017
    Publication date: October 5, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Erwin GOESNAR, David GUNAWAN
  • Publication number: 20170289555
    Abstract: A first signal in a first color format is received. The first signal is transformed to a second signal in a second color format to be compressed using an encoder. Before encoding, the chroma components of the second signal are reshaped according to the statistical characteristics of the chroma components of the first signal to generate a third signal. In a decoder, an inverse reshaping functions is applied to the chroma components of the decoded signal to generate an approximation of the second signal.
    Type: Application
    Filed: March 28, 2017
    Publication date: October 5, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Guan-Ming SU
  • Publication number: 20170289725
    Abstract: The invention discloses rendering sound field signals, such as Higher-Order Ambisonics (HOA), for arbitrary loudspeaker setups, where the rendering results in highly improved localization properties and is energy preserving. This is obtained by a new type of decode matrix for sound field data, and a new way to obtain the decode matrix.
    Type: Application
    Filed: June 12, 2017
    Publication date: October 5, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Johannes BOEHM, Florian KEILER
  • Publication number: 20170289721
    Abstract: M audio input channels, each associated with a spatial direction, are translated to N audio output channels, each associated with a spatial direction, wherein M and N are positive whole integers, M is three or more, and N is three or more, by deriving the N audio output channels from the M audio input channels, wherein one or more of the M audio input channels is associated with a spatial direction other than a spatial direction with which any of the N audio output channels is associated, and at least one of the one or more of the M audio input channels is mapped to a respective set of at least three of the N output channels. At least three output channels of a set may be associated with contiguous spatial directions.
    Type: Application
    Filed: April 13, 2017
    Publication date: October 5, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Mark F. DAVIS
  • Patent number: 9781273
    Abstract: In some embodiments, a method for preparing monophonic audio for transmission to a node of a teleconferencing system, including steps of generating a monophonic mixed audio signal, including by a mixing a metadata signal (e.g., a tone) with monophonic audio indicative of speech by a currently dominant participant in a teleconference, and encoding the mixed audio signal for transmission, where the metadata signal is indicative of an apparent source position for the currently dominant conference participant. Other embodiments include steps of decoding such a transmitted encoded signal to determine the monophonic mixed audio signal, identifying the metadata signal, and determining the apparent source position corresponding to the currently dominant participant from the metadata signal. Other aspects are systems configured to perform any embodiment of the method or steps thereof.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Francis C. Quiers
  • Patent number: 9779688
    Abstract: Techniques for editing visual content by anchoring visual adaptation are disclosed. At least one anchor pattern is presented on a display surround. The perceptibility of the at least one anchor pattern is dependent on visual adaptation. The visual content is edited during the presentation of the at least one anchor pattern. For specific embodiments, the presentation, whether continuous or periodic, can include illumination, emission, reflection, rear projection, forward projection, or the like. A plurality of the patterns can be disposed around a reference display.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Robin Atkins
  • Patent number: 9779745
    Abstract: A method performed in an audio decoder for decoding M encoded audio channels representing N audio channels is disclosed. The method includes receiving a bitstream containing the M encoded audio channels and a set of spatial parameters, decoding the M encoded audio channels, and extracting the set of spatial parameters from the bitstream. The method also includes analyzing the M audio channels to detect a location of a transient, decorrelating the M audio channels, and deriving N audio channels from the M audio channels and the set of spatial parameters. A first decorrelation technique is applied to a first subset of each audio channel and a second decorrelation technique is applied to a second subset of each audio channel The first decorrelation technique represents a first mode of operation of a decorrelator, and the second decorrelation technique represents a second mode of operation of the decorrelator.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Mark F. Davis
  • Patent number: 9780751
    Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Alan J. Seefeldt
  • Patent number: 9779746
    Abstract: A method performed in an audio decoder for reconstructing an original audio signal having a lowband portion and a highband portion is disclosed. The method includes receiving an encoded audio signal and extracting reconstruction parameters from the encoded audio signal. The method further includes decoding the encoded audio signal with a core audio decoder to obtain a decoded lowband portion and regenerating the highband portion based at least in part on a cross over frequency and the decoded lowband portion to obtain a regenerated highband portion. The method also includes creating a synthetic sinusoid with a level based at least in part on a spectral envelope value for the particular subband and a noise floor value for the particular subband and adding the synthetic sinusoid to the regenerated highband portion in the particular frequency band specified by the location information.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: October 3, 2017
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Per Ekstrand, Holger Hoerich
  • Patent number: 9781417
    Abstract: HDR images are coded and distributed. An initial HDR image is received. Processing the received HDR image creates a JPEG-2000 DCI-compliant coded baseline image and an HDR-enhancement image. The coded baseline image has one or more color components, each of which provide enhancement information that allows reconstruction of an instance of the initial HDR image using the baseline image and the HDR-enhancement images. A data packet is computed, which has a first and a second data set. The first data set relates to the baseline image color components, each of which has an application marker that relates to the HDR-enhancement images. The second data set relates to the HDR-enhancement image. The data packets are sent in a DCI-compliant bit stream.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Ajit Ninan, Samir N. Hulyalkar
  • Patent number: 9779738
    Abstract: The present document relates to audio encoding/decoding. In particular, the present document relates to a method and system for improving the quality of encoded multi-channel audio signals. An audio encoder configured to encode a multi-channel audio signal according to a total available data-rate is described. The multi-channel audio signal is representable as a basic group (121) of channels for rendering the multi-channel audio signal in accordance to a basic channel configuration, and as an extension group (122) of channels, which—in combination with the basic group (122)—is for rendering the multi-channel audio signal in accordance to an extended channel configuration. The basic channel configuration and the extended channel configuration are different from one another.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: October 3, 2017
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Harald Mundt, Jeffrey Riedmiller, Karl J. Roeden, Michael Ward, Phillip Williams
  • Patent number: 9779737
    Abstract: A better compromise between a too high bitstream and decoding overhead on the one hand and flexibility of frame element positioning on the other hand is achieved by arranging that each of the sequence of frames of the bitstream has a sequence of N frame elements and, on the other hand, the bitstream has a configuration block having a field indicating the number of elements N and a type indication syntax portion indicating, for each element position of the sequence of N element positions, an element type out of a plurality of element types with, in the sequences of N frame elements of the frames, each frame element being of the element type indicated, by the type indication portion, for the respective element position at which the respective frame element is positioned within the sequence of N frame elements of the respective frame in the bitstream.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: October 3, 2017
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., DOLBY INTERNATIONAL AB, KONINKLIJKE PHILIPS N.V.
    Inventors: Max Neuendorf, Markus Multrus, Stefan Doehla, Heiko Purnhagen, Frans De Bont
  • Patent number: 9776101
    Abstract: A light absorbing configuration for a venue in which images are projected to a display screen located at or near a front of the venue, may comprise a light absorbing structure deployed on one or more front portions on one or more of a ceiling, side walls, or a floor of the venue. The light absorbing structure comprises grooves formed at least in part by a first type of light reflective surfaces configured to receive a portion of light rays directly reflected off the display screen and a second type of light reflective surfaces configured to receive light rays reflected off the first type of light reflective surfaces.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Martin J. Richards, Douglas J. Gorny
  • Patent number: 9779748
    Abstract: The document relates to modulated sub-sampled digital filter banks, as well as to methods and systems for the design of such filter banks. In particular, the present document proposes a method and apparatus for the improvement of low delay modulated digital filter banks. The method employs modulation of an asymmetric low-pass prototype filter and a new method for optimizing the coefficients of this filter. Further, a specific design for a 64 channel filter bank using a prototype filter length of 640 coefficients and a system delay of 319 samples is given. The method substantially reduces artifacts due to aliasing emerging from independent modifications of subband signals, for example when using a filter bank as a spectral equalizer. The method is preferably implemented in software, running on a standard PC or a digital signal processor (DSP), but can also be hardcoded on a custom chip.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: October 3, 2017
    Assignee: Dolby International AB
    Inventor: Per Ekstrand
  • Patent number: 9778542
    Abstract: Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Gregory David Miller, Gennady Imeshev
  • Publication number: 20170280149
    Abstract: A method is provided for coding at least one image split up into partitions, a current partition to be coded containing data, at least one data item of which is allotted a sign. The coding method includes, for the current partition, the following steps: calculating the value of a function representative of the data of the current partition with the exclusion of the sign; comparing the calculated value with a predetermined value of the sign; as a function of the result of the comparison, modifying or not modifying at least one of the data items of the current partition, in the case of modification, coding the at least one modified data item.
    Type: Application
    Filed: June 9, 2017
    Publication date: September 28, 2017
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Felix Henry, Gordon Clare
  • Patent number: 9774882
    Abstract: Encoding and decoding architectures for 3D video delivery are described, such as 2D compatible 3D video delivery and frame compatible 3D video delivery. The architectures include pre-processing stages to pre-process the output of a base layer video encoder and/or decoder and input the pre-processed output into an enhancement layer video encoder and/or decoder of one or more enhancement layers. Multiplexing methods of how to combine the base and enhancement layer videos are also described.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: September 26, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexandros Tourapis, Peshala V. Pahalawatta, Athanasios Leontaris, Kevin J. Stec, Walter J. Husak
  • Patent number: 9774975
    Abstract: Encoding of Higher Order Ambisonics (HOA) signals commonly results in high data rates. A method for low bit-rate encoding frames of an input HOA signal having coefficient sequences comprises computing (s110) a truncated HOA representation (CT(k)), determining (s111) active coefficient sequences (Ic,Act(k)), estimating (s16) candidate directions (MDIR(k)), dividing (s15) the input HOA signal into a plurality of frequency subbands (f1, . . . , fF), estimating (s161) for each of the frequency subbands a subset of candidate directions (MDIR(k)) as active directions (MDIR(k,f1), . . . , MDIR(k,fF)) and for each active direction a trajectory, computing (s17) for each frequency subband directional subband signals from the coefficient sequences of the frequency subband according to the active directions, calculating (s18) for each frequency subband a prediction matrix (A(k,f1), . . .
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: September 26, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexander Krueger, Sven Kordon
  • Patent number: 9774309
    Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: September 26, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Alan J. Seefeldt
  • Patent number: 9773503
    Abstract: An audio decoder for decoding an encoded audio signal, the encoded audio signal including a first channel element and a second channel element in a payload section of a data stream and first decoder configuration data for the first channel element and second decoder configuration data for the second channel element in a configuration section of the data stream, includes: a data stream reader for reading the configuration data for each channel element in the configuration section and for reading the payload data for each channel element in the payload section; a configurable decoder for decoding the plurality of channel elements; and a configuration controller for configuring the configurable decoder so that the configurable decoder is configured in accordance with the first decoder configuration data when decoding the first channel element and in accordance with the second decoder configuration data when decoding the second channel element.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: September 26, 2017
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., DOLBY INTERNATIONAL AB, KONINKLIJKE PHILIPS N.V.
    Inventors: Max Neuendorf, Markus Multrus, Stefan Doehla, Heiko Purnhagen, Frans De Bont
  • Patent number: 9774868
    Abstract: Embodiments of the present invention relate to methods and systems for ordering, communicating and applying pixel intra-prediction modes.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: September 26, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Louis J. Kerofsky
  • Patent number: 9772530
    Abstract: A display provides increased contrast and resolution via first LCD panel energized to generate an image and a second LCD panel configured to increase contrast of the image. The second panel is an LCD panel without color filters and is configured to increase contrast by decreasing black levels of dark portions of images using polarization rotation and filtration. The second LCD panel may have higher resolution than the first LCD panel. A half wave plate and/or film is placed in between the first and the second panel. The panels may be directly illuminated or edge lit, and may be globally or locally dimmed lights that may also include individual control of color intensities for each image or frame displayed.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: September 26, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: John Gilbert
  • Publication number: 20170272375
    Abstract: Disclosed is a method and apparatus operative to process packets of media received from a network including a receiver unit operative, a jitter buffer data structure and a playback head defining a point in the jitter buffer data structure from which the ordered queue of packets are to be played back, and at least one prototype head. Each prototype head having a predetermined latency assigned thereto and defining a point in the jitter buffer data structure from which the ordered queue of packets is being played back containing said latency a processor operable to determine a measure of conversational quality associated with the ordered queue of packets being played back by each prototype head. Also described is a head selector operable to compare the measures of conversational quality associated with the ordered queue of packets being played back by each prototype head to select the prototype head with the highest measure of conversational quality and a playback unit coupled to the playback head.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 21, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Hannes MUESCH, Richard J. CARTWRIGHT
  • Publication number: 20170270939
    Abstract: A method (500) for resampling an audio signal (110) is described. The method (500) comprising providing (501) a set of input subband signals (210) which is representative of a time domain audio signal. Furthermore, the method (500) comprises applying (502) a first ripple pre-emphasis gain (323) to a first input subband signal (210) of the set of input subband signals (210) to determine a corresponding first output subband signal (213) of a set of output subband signals (213). In addition, the method (500) comprises determining (503) a time domain input audio signal (110) from the set of output subband signals (213).
    Type: Application
    Filed: March 15, 2017
    Publication date: September 21, 2017
    Applicant: Dolby International AB
    Inventors: Harald MUNDT, Klaus PEICHL, Wolfgang A. SCHILDBACH
  • Publication number: 20170272866
    Abstract: Embodiments are directed to a micro transducer array comprising a shared motor system having a base plate and mounting interfaces to a frame of a portable electronic device; a first transducer comprising a first magnet disposed between the base plate and a first top plate, and a first diaphragm projecting sound out of a surface of the portable device; a second transducer comprising a second magnet disposed between the base plate and a second top plate, and a second diaphragm projecting sound of an opposite surface of the portable device; a first pair of input terminals inputting a first audio signal to the first transducer; and a second pair of input terminals inputting a second audio signal to the second transducer.
    Type: Application
    Filed: March 15, 2017
    Publication date: September 21, 2017
    Applicant: Dolby International AB
    Inventor: Kelvin Francis GRIFFITHS
  • Patent number: RE46565
    Abstract: An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: October 3, 2017
    Assignee: DOLBY INTERNATIONAL AB
    Inventors: Mineo Tsushima, Takeshi Norimatsu, Kosuke Nishio, Naoya Tanaka