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: 10032458
    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: March 15, 2017
    Date of Patent: July 24, 2018
    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: 10034117
    Abstract: The positions of a plurality of speakers at a media consumption site are determined. Audio information in an object-based format is received. Gain adjustment value for a sound content portion in the object-based format may be determined based on the position of the sound content portion and the positions of the plurality of speakers. Audio information in a ring-based channel format is received. Gain adjustment value for each ring-based channel in a set of ring-based channels may be determined based on the ring to which the ring-based channel belongs and the positions of the speakers at a media consumption site.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: July 24, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Nicolas R. Tsingos, David S. McGrath, Freddie Sanchez, Antonio Mateos Sole
  • Publication number: 20180204581
    Abstract: According to an aspect of the present invention, a method for reconstructing an audio signal having a baseband portion and a highband portion is disclosed. The method includes obtaining a decoded baseband audio signal by decoding an encoded audio signal and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal. The method further includes generating a noise component based on a noise parameter. Finally, the method includes adjusting a phase of the high-frequency reconstructed signal and obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal to obtain a time-domain reconstructed audio signal.
    Type: Application
    Filed: March 15, 2018
    Publication date: July 19, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Michael M. Truman, Mark S. Vinton
  • Patent number: 10027963
    Abstract: An encoder receives an input enhanced dynamic range (EDR) image and a corresponding lower dynamic range (LDR) image to be coded at a given target rate. Before coding, a pre-dithering process is applied to the input LDR image to generate a dithered LDR image at a second bit depth, lower than its original bit depth. The pre-dithering process includes: generating uniformly-distributed noise, applying a spatial filter to the noise to generate low-pass or high-pass filtered noise, applying a temporal high pass or low pass filter to the spatially-filtered noise to generate output noise, adding the output noise to the input LDR image to generate a noise-enhanced LDR image, and quantizing the noise-enhanced image to generate the dithered LDR image. Selecting the characteristics of the dithering filters is based on both the target bit rate and luminance characteristics of the pixels in the input LDR image.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: July 17, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Qian Chen, Bongsun Lee, Scott Daly
  • Patent number: 10026139
    Abstract: A method of detecting and extracting a watermark (digital watermarking) in a digital signal. The watermark is composed by the repetition of elementary components of a load to be transmitted. At least one repetition of an elementary component in the digital signal is detected. At least one quality attribute is assigned to each repetition of at least one elementary component. The repetitions of an elementary component are sorted according to a function of the quality attributes of these repetitions. Certain repetitions, dubbed individualities, of an elementary component are selected. The selected repetitions are fused.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: July 17, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Philippe Nguyen, Camille Rizko
  • Patent number: 10026408
    Abstract: Exemplary embodiments provide encoding and decoding methods, and associated encoders and decoders, for encoding and decoding of an audio scene which at least comprises one or more audio objects (106a). The encoder (108, 110) generates a bit stream (116) which comprises downmix signals (112) and side information which includes individual matrix elements (114) of a reconstruction matrix which enables reconstruction of the one or more audio objects (106a) in the decoder (120).
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: July 17, 2018
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Lars Villemoes, Leif Jonas Samuelsson, Toni Hirvonen
  • Patent number: 10027961
    Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: July 17, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Wenhui Jia, Ajit Ninan, Arkady Ten, Gregory John Ward
  • Publication number: 20180197561
    Abstract: Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
    Type: Application
    Filed: March 7, 2018
    Publication date: July 12, 2018
    Applicants: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Per Hedelin, Arijit Biswas, Michael Schug, Vinay Melkote
  • Publication number: 20180199130
    Abstract: A time heuristic audio control system, comprises a receiver for receiving time-based data from a personal computing device and a memory storing one or more sets processing parameters comprising instructions for processing the ambient sound based upon the time-based data. The system further includes a processor coupled to the memory and the receiver configured to adjust the ambient sound as directed by a selected set of processing parameters retrieved from the memory to create adjusted audio, the selected set of processing parameters retrieved based upon the time-based data and at least one speaker for outputting the adjusted audio.
    Type: Application
    Filed: March 9, 2018
    Publication date: July 12, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Matthew J. Jaffe, Noah Kraft, Richard Fritz Lanman, III, Jeffrey Baker
  • Publication number: 20180197562
    Abstract: Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
    Type: Application
    Filed: March 8, 2018
    Publication date: July 12, 2018
    Applicants: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Per Hedelin, Arijit Biswas, Michael Schug, Vinay Melkote
  • Patent number: 10021508
    Abstract: Spherical microphone arrays capture a three-dimensional sound field (P(?c, t)) for generating an Ambisonics representation (Anm(t)), where the pressure distribution on the surface of the sphere is sampled by the capsules of the array. The impact of the microphones on the captured sound field is removed using the inverse microphone transfer function. The equalization of the transfer function of the microphone array is a big problem because the reciprocal of the transfer function causes high gains for small values in the transfer function and these small values are affected by transducer noise. The invention minimizes that noise by using a Wiener filter processing in the frequency domain, which processing is automatically controlled per wave number by the signal-to-noise ratio of the microphone array.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: July 10, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Johann-Markus Batke, Alexander Krueger, Mark R. P. Thomas
  • Patent number: 10021390
    Abstract: Inter-color image prediction is based on multi-channel multiple regression (MMR) models. Image prediction is applied to the efficient coding of images and video signals of high dynamic range. MMR models may include first order parameters, second order parameters, and cross-pixel parameters. MMR models using extension parameters incorporating neighbor pixel relations are also presented. Using minimum means-square error criteria, closed form solutions for the prediction parameters are presented for a variety of MMR models.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: July 10, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Sheng Qu, Hubert Koepfer, Yufei Yuan, Samir Hulyalkar
  • Patent number: 10020001
    Abstract: A method for decoding an encoded audio signal is described. The encoded audio signal comprises a sequence of frames, and is indicative of a plurality of different dynamic range control (DRC) profiles for a corresponding plurality of different rendering modes. The method comprises determining a first rendering mode from the plurality of different rendering modes; determining one or more DRC profiles from a subset of DRC profiles comprised within a current frame of the sequence of frames; determining whether at least one of the one or more DRC profiles is applicable to the first rendering mode; selecting a default DRC profile as a current DRC profile, if none of the one or more DRC profiles is applicable to the first rendering mode; wherein definition data of the default DRC profile is known at a decoder; and decoding the current frame using the current DRC profile.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 10, 2018
    Assignee: Dolby International AB
    Inventors: Holger Hoerich, Jeroen Koppens
  • Patent number: 10021502
    Abstract: A multi-channel decoder for generating a binaural signal from a downmix signal using upmix rule information on an energy-error introducing upmix rule for calculating a gain factor based on the upmix rule information and characteristics of head related transfer function based filters corresponding to upmix channels. The one or more gain factors are used by a filter processor for filtering the downmix signal so that an energy corrected binaural signal having a left binaural channel and a right binaural channel is obtained.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: July 10, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Publication number: 20180192062
    Abstract: In a decoder, a processor extracts a control map of false contour filtering from a part of a multi-layer video signal that includes a low dynamic range image mapped from an original high-dynamic range (HDR) image. It determines one or more filter parameters for a sparse finite-impulse-response (FIR) filter, where the one or more filter parameters relate to at least in part on the control map of false contour filtering and a predicted image predicted from the low dynamic range image. It applies the sparse FIR filter to filter pixel values in a portion of the predicted image based at least in part on the control map of false contour filtering, and it reconstructs a version of the original HDR image based at least in part on the portion of the predicted image as filtered by the FIR filter.
    Type: Application
    Filed: March 30, 2017
    Publication date: July 5, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Qian Chen, Peng Yin, Sheng Qu
  • Publication number: 20180192230
    Abstract: Embodiments are described for an adaptive audio system that processes audio data comprising a number of independent monophonic audio streams. One or more of the streams has associated with it metadata that specifies whether the stream is a channel-based or object-based stream. Channel-based streams have rendering information encoded by means of channel name; and the object-based streams have location information encoded through location expressions encoded in the associated metadata. A codec packages the independent audio streams into a single serial bitstream that contains all of the audio data. This configuration allows for the sound to be rendered according to an allocentric frame of reference, in which the rendering location of a sound is based on the characteristics of the playback environment (e.g., room size, shape, etc.) to correspond to the mixer's intent.
    Type: Application
    Filed: February 26, 2018
    Publication date: July 5, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Charles Q. ROBINSON, Nicolas R. TSINGOS, Christophe CHABANNE
  • Publication number: 20180190215
    Abstract: Dual modulator displays are disclosed incorporating a phosphorescent plate interposed in the optical path between a light source modulation layer and a display modulation layer. Spatially modulated light output from the light source modulation layer impinges on the phosphorescent plate and excites corresponding regions of the phosphorescent plate which in turn emit light having different spectral characteristics than the light output from the light source modulation layer. Light emitted from the phosphorescent plate is received and further modulated by the display modulation layer to provide the ultimate display output.
    Type: Application
    Filed: February 26, 2018
    Publication date: July 5, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Lorne A. Whitehead, Gregory John Ward, Louis D. Silverstein, Helge Seetzen
  • Publication number: 20180190266
    Abstract: Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations disclosed herein involve receiving speech recognition results data, including a plurality of speech recognition lattices and a word recognition confidence score for each of a plurality of hypothesized words of the speech recognition lattices, for a conference recording. A primary word candidate and alternative word hypotheses may be determined for hypothesized words in the speech recognition lattices. A term frequency metric may be calculated for sorting the primary word candidates and the alternative word hypotheses. Hypothesized words may be rescored according to an alternative hypothesis list.
    Type: Application
    Filed: February 3, 2016
    Publication date: July 5, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Xuejing SUN, Richard J. CARTWRIGHT
  • Publication number: 20180192186
    Abstract: Input audio data, including first microphone audio signals and second microphone audio signals output by a pair of coincident, vertically-stacked directional microphones, may be received. An azimuthal angle corresponding to a sound source location may be determined, based at least in part on an intensity difference between the first microphone audio signals and the second microphone audio signals. An elevation angle corresponding to a sound source location may be determined, based at least in part on a temporal difference between the first microphone audio signals and the second microphone audio signals. Output audio data, including at least one audio object corresponding to a sound source, may be generated. The audio object may include audio object signals and associated audio object metadata. The audio object metadata may include at least audio object location data corresponding to the sound source location.
    Type: Application
    Filed: July 1, 2016
    Publication date: July 5, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Nicolas R. TSINGOS
  • Publication number: 20180191912
    Abstract: Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations disclosed herein involve receiving audio data corresponding to a recording of at least one conference involving a plurality of conference participants. In some examples, only a portion of the received audio data will be selected as playback audio data. The selection process may involve a topic selection process, a talkspurt filtering process and/or an acoustic feature selection process. Some examples involve receiving an indication of a target playback time duration. Selecting the portion of audio data may involve making a time duration of the playback audio data within a threshold time difference of the target playback time duration.
    Type: Application
    Filed: February 3, 2016
    Publication date: July 5, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Richard J. CARTWRIGHT, Xuejing SUN
  • Patent number: 10014657
    Abstract: Methods and systems for optical assemblies are disclosed. Optical assemblies can comprise optical elements that may not require active alignment and allow for reduced performance variations. To allow for passive assembly with a machine like a bonder tool, assembly components can have bonding pads and/or fiducial markers that are fabricated using laser micromachining techniques.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: July 3, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Gregory David Miller, Gennady Imeshev, James Thomas Triplett
  • Patent number: 10015614
    Abstract: A multi-channel decoder for generating a binaural signal from a downmix signal using upmix rule information on an energy-error introducing upmix rule for calculating a gain factor based on the upmix rule information and characteristics of head related transfer function based filters corresponding to upmix channels. The one or more gain factors are used by a filter processor for filtering the downmix signal so that an energy corrected binaural signal having a left binaural channel and a right binaural channel is obtained.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: July 3, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10014005
    Abstract: Embodiments are described for harmonicity estimation, audio classification, pitch determination and noise estimation. Measuring harmonicity of an audio signal includes calculation a log amplitude spectrum of audio signal. A first spectrum is derived by calculating each component of the first spectrum as a sum of components of the log amplitude spectrum on frequencies. In linear frequency scale, the frequencies are odd multiples of the component's frequency of the first spectrum. A second spectrum is derived by calculating each component of the second spectrum as a sum of components of the log amplitude spectrum on frequencies. In linear frequency scale, the frequencies are even multiples of the component's frequency of the second spectrum. A difference spectrum is derived subtracting the first spectrum from the second spectrum. A measure of harmonicity is generated as a monotonically increasing function of the maximum component of the difference spectrum within predetermined frequency range.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: July 3, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Xuejing Sun, Zhiwei Shuang, Shen Huang
  • Patent number: 10015465
    Abstract: Stereoscopic video data and corresponding depth map data for multi-view auto-stereoscopic displays are coded using a multiplexed asymmetric image frame that combines an image data partition and a depth map data partition, wherein the size of the image data partition is different than the size of the depth map data partition. The image data partition comprises one or more of the input views while the depth map partition comprises at least a portion of the depth map data rotated with respect to the orientation of the image data in the multiplexed output image frame.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: July 3, 2018
    Assignees: Dolby International AB, Koninklijke Philips N.V.
    Inventors: Wilhelmus Henrikus Bruls, Klaas Heinrich Schueuer, Philipp Kraetzer
  • Patent number: 10015612
    Abstract: Some methods may involve receiving a block of audio data, the block including N pulse code modulated (PCM) audio channels, including audio samples for each of the N channels, receiving metadata associated with the block of audio data and receiving a first set of values corresponding to reference audio samples. A second set of values, corresponding to audio samples from the block of audio data, may be determined. The first and second set of values may be compared. Based on the comparison, it may be determined whether the block of audio data is synchronized with the metadata.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: July 3, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Kent Bennett Terry, Scott Gregory Norcross, Jeffrey Riedmiller
  • Patent number: 10013991
    Abstract: The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: July 3, 2018
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Lars Villemoes
  • Patent number: 10015525
    Abstract: In high-dynamic range (HDR) coding, content mapping translates an HDR signal to a signal of lower dynamic range. Coding and prediction in layered coding of HDR signals is improved if content mapping utilizes signal color ranges beyond those defined by a traditional electro-optical transfer function (EOTF) or its inverse (IEOTF or OETF). Extended EOTF and IEOTF functions are derived based on their mirror points. Examples of extended EOTFs are given for ITU BT. 1886 and SMPTE ST 2084.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: July 3, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Guan-Ming Su, Tao Chen
  • Patent number: 10015597
    Abstract: A multi-channel input signal having at least three original channels is represented by a parameter representation of the multi-channel signal. A first balance parameter, a first coherence parameter, or a first inter-channel time difference between a first channel pair and a second balance parameter, or a second coherence parameter, or a second inter-channel time difference parameter between a second channel pair are calculated. This set of parameters is the parameter representation of the original signals. The first channel pair has two channels, which are different from two channels of a second channel pair. Furthermore, each channel of the two channel pairs is one of the original channels, or a weighted combination of the original channels, and the first channel pair and the second channel pair include information on the three original channels.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: July 3, 2018
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Lars Villemoes, Jonas Engdegard, Jonas Roeden, Kristofer Kjoerling
  • Patent number: 10015491
    Abstract: Systems and methods are disclosed for in-loop, region-based, reshaping for the coding of high-dynamic range video. Using a high bit-depth buffer to store input data and previously decoded reference data, forward and backward, in-loop, reshaping functions allow video coding and decoding to be performed at a target bit depth lower than the input bit depth. Methods for the clustering of the reshaping functions to reduce data overhead are also presented.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: July 3, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Guan-Ming Su
  • Patent number: 10015443
    Abstract: Example embodiments disclosed herein relate to spatial congruency adjustment. A method for adjusting spatial congruency in a video conference is disclosed. The method in unwarping a visual scene captured by a video endpoint device into at least one rectilinear scene, the video endpoint device being configured to capture the visual scene in an omnidirectional manner, detecting spatial congruency between the at least one rectilinear scene and an auditory scene captured by an audio endpoint device that is positioned in relation to the video endpoint device. The spatial congruency being a degree of alignment between the auditory scene and the at least one rectilinear scene and in response to the detected spatial congruency being below the threshold, adjusting the spatial congruency. Corresponding system and computer program products are also disclosed.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: July 3, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Xuejing Sun, Michael Eckert
  • Patent number: 10012895
    Abstract: The present invention provides a cinema screen that improves audience perception of brightness at, for example, a premium theater without additional illumination cost. The screen is produced from materials that also help mitigate speckle from laser illumination. The screen has properties and includes structures that may be tuned to the specific capabilities of the projection system, arrangement of the theater, and projector (and angle of projection, angle of viewing). Light reflected from the screen are direct toward audience members and away from walls and ceilings.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: July 3, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Douglas J Gorny, Martin J Richards, Timo Kunkel, David Lloyd Schnuelle
  • Publication number: 20180184224
    Abstract: A method of creating a multichannel audio signal by: determining an expected series of audio emission source locations around an expected listener location; determining a surface around the expected listener location, the surface including the expected series of audio emission source locations; mapping an audio object location into a surface energy component having a surface energy location and magnitude and an expected listener location energy component having an expected listeners location energy location and magnitude; panning an audio object signal for the surface energy component to surrounding expected audio emission sources to produce a first set of surface panned audio emission signals; panning the audio object signal for the expected listeners location energy location to surrounding expected audio emission sources to produce a second set of expected listeners location panned audio emission signals; combining the first and second set of panned audio signals to produce the multichannel audio signal.
    Type: Application
    Filed: June 23, 2016
    Publication date: June 28, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: David S. McGRATH
  • Publication number: 20180182310
    Abstract: Apparatus and methods are provided that employ one or more of a variety of techniques for reducing the time required to display high resolution images on a high dynamic range display having a light source layer and a display layer. In one technique, the image resolution is reduced, an effective luminance pattern is determined for the reduced resolution image, and the resolution of the effective luminance pattern is then increased to the resolution of the—display layer. In another technique, the light source layer's point spread function is decomposed into a plurality of components, and an effective luminance pattern is determined for each component. The effective luminance patterns are then combined to produce a total effective luminance pattern. Additional image display time reduction techniques are provided.
    Type: Application
    Filed: February 20, 2018
    Publication date: June 28, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Lorne A. Whitehead, Helge Seetzen, Gregory John Ward, Wolfgang Heidrich
  • Publication number: 20180182404
    Abstract: The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency Q?+r?0 is generated on the basis of existing components at ? and ?+?0. The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank, a subband processing unit configurable by control data and a synthesis filter bank.
    Type: Application
    Filed: February 26, 2018
    Publication date: June 28, 2018
    Applicant: DOLBY INTERNATIONAL AB
    Inventor: Lars VILLEMOES
  • Publication number: 20180181880
    Abstract: Embodiments of training signal processing models for component replacement in signal processing systems are disclosed. A device for training a third signal processing model via a machine learning method include a first calculating unit, a second calculating unit and a training unit. The first calculating unit calculates a first output from each first sample in a first sample set based on a first signal processing model. The second calculating unit calculates a second output from the first sample based on a second signal processing model. The training unit trains a third signal processing model by minimizing a first cost including a first error between the first output and a third output, so that the combination of the second signal processing model and the third signal processing model can simulate the behaviors of the first signal processing model on the first sample set. The third output is an output of the third signal processing model in response to an input including the second output.
    Type: Application
    Filed: May 4, 2016
    Publication date: June 28, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guiping WANG, Li LU
  • Publication number: 20180182352
    Abstract: Image data is transformed for display on a target display. A sigmoidal transfer function provides a free parameter controlling min-tone contrast. The transfer function may be dynamically adjusted to accommodate changing ambient lighting conditions. The transformation may be selected so as to automatically adapt image data for display on a target display in a way that substantially preserves creative intent embodied in the image data. The image data may be video data.
    Type: Application
    Filed: February 22, 2018
    Publication date: June 28, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Anders Ballestad, Andrey Kostin
  • Publication number: 20180182402
    Abstract: Encoding of Higher Order Ambisonics (HOA) signals commonly results in high data rates.
    Type: Application
    Filed: July 2, 2015
    Publication date: June 28, 2018
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Alexander KRUEGER, Sven KORDON
  • Patent number: 10008218
    Abstract: A system and method of blind bandwidth extension. The system selects a prediction model from a number of stored prediction models that were generated using an unsupervised clustering method (e.g., a k-means method) and a supervised regression process (e.g., a support vector machine), and extends the bandwidth of an input musical audio signal.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: June 26, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Chih-Wei Wu, Mark S. Vinton
  • Patent number: 10009688
    Abstract: A communication system for communicating with at least one loudspeaker is described where the loudspeaker is connected to audio equipment over standard two-wire speaker wire operable to carry an audio signal. The communication system includes a master node in electrical communication with a signal path carrying the audio signal between the audio equipment and the loudspeaker, the master node also including an interface with the audio equipment, a data encoder operable to encode data signals, a data transceiver operable to place the data signals onto the audio signal at frequencies above audio frequencies. The communication system also includes at least one slave node in electrical communication with the audio signal and each loudspeaker, the slave node including a data transceiver operable to receive data signals from the master node, a data decoder, and an interface able to communicate with the loudspeaker.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: June 26, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Joel Butler
  • Patent number: 10009475
    Abstract: In an audio teleconference mixing system, of the type mixing a first plurality of audio uplink input streams containing audio information including sensed audio and associated control information, to produce at least one audio downlink output stream for downlinking to at least one conference participants, wherein the audio uplink input streams potentially can include continuous transmission (CTX) and discontinuous transmission streams (DTX), a method of mixing multiple current audio uplink streams together to produce the at least one audio output stream, the method including the steps of: (a) determining a verbosity measure indicative of the likely importance of each current audio uplink streams; (b) where at least one current audio uplink stream can comprise a CTX stream, utilizing at least one CTX stream in the mix to produce at least one current downlink output stream.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: June 26, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Richard J. Cartwright
  • Patent number: 10008213
    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: August 15, 2017
    Date of Patent: June 26, 2018
    Assignee: Dolby International AB
    Inventors: Lars G. Liljeryd, Per Ekstrand, Fredrik Henn, Kristofer Kjoerling
  • Publication number: 20180174532
    Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light into second light. The light conversion layer can include quantum dots or phosphor materials. Modulation drive signals are generated to determine transmission of the second light through individual subpixels of the display. These modulation drive signals can be adjusted based on one or more light field simulations. The light field simulations can include: (i) a color shift for a pixel based on a point spread function of the illumination sources; (ii) binning difference of individual illumination sources; (iii) temperature dependence of display components on performance; or (iv) combinations thereof.
    Type: Application
    Filed: January 31, 2018
    Publication date: June 21, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Ajit NINAN, Chun Chi WAN
  • Publication number: 20180176535
    Abstract: View direction data of the viewer is collected in real time while the viewer is viewing a first reconstructed omnidirectional image. The view direction data is sent to the video streaming server to cause generating image layers from an omnidirectional image in reference to a view direction of the viewer. The image layers comprising a focal-vision image layer and a peripheral-vision image layer. A second reconstructed omnidirectional image is generated from the image layers. The second reconstructed omnidirectional image is subsequently rendered to the viewer.
    Type: Application
    Filed: December 14, 2017
    Publication date: June 21, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Ajit NINAN, Chaitanya ATLURU
  • Publication number: 20180174777
    Abstract: An apparatus may include: a stationary module; a movable module having an outer surface and a substrate; a tactile switch secured on a first side of the substrate; a light indicator secured on a second side of the substrate, the first side and the second side being opposing sides of the substrate, etc. The movable module is configured to generate a spatial displacement relative to the stationary module along a spatial direction in response to a physical force exerted on the outer surface along the spatial direction.
    Type: Application
    Filed: March 2, 2016
    Publication date: June 21, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: David CLEMENTSON
  • Publication number: 20180174534
    Abstract: A non-uniform illumination pattern is determined with a display panel of a display device. The non-uniform illumination pattern comprises different values of the one or more illumination properties in first and second spatial regions of the display panel. An illumination compensation pattern is generated based at least in part on the non-uniform illumination pattern. The illumination compensation pattern is configured to homogenize values of the illumination properties in a plurality of spatial regions of the display panel that include the first and second spatial regions, and implemented in the display device.
    Type: Application
    Filed: March 19, 2015
    Publication date: June 21, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Ajit NINAN, Chun Chi WAN
  • Publication number: 20180176682
    Abstract: Input audio data portions of a common time window index value generated by multiple microphones at a location are received. Subband portions are generated from the input audio data portions. Peak powers, noise floors, etc., are individually determined for the subband portions. Weights for the subband portions are computed based on the peak powers, the noise floors, etc., for the subband portions. An integrated audio data portion of the common time window index is generated based on the subband portions and the weight values for the subband portions. An integrated signal may be generated based at least in part on the integrated audio data portion.
    Type: Application
    Filed: March 21, 2016
    Publication date: June 21, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Erwin GOESNAR, David GUNAWAN
  • Publication number: 20180172502
    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: Application
    Filed: July 6, 2016
    Publication date: June 21, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Dong SHI, David GUNAWAN, Glenn N. DICKINS, Kai LI
  • Patent number: 10003900
    Abstract: A computer implemented system for rendering captured audio soundfields to a listener comprises apparatus to deliver the audio soundfields to the listener. The delivery apparatus delivers the audio soundfields to the listener with first and second audio elements perceived by the listener as emanating from first and second virtual source locations, respectively, and with the first audio element and/or the second audio element delivered to the listener from a third virtual source location. The first virtual source location and the second virtual source location are perceived by the listener as being located to the front of the listener, and the third virtual source location is located to the rear or the side of the listener.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: June 19, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Richard J. Cartwright, David S. McGrath, Glenn N. Dickins
  • Patent number: 10003907
    Abstract: Diffuse or spatially large audio objects may be identified for special processing. A decorrelation process may be performed on audio signals corresponding to the large audio objects to produce decorrelated large audio object audio signals. These decorrelated large audio object audio signals may be associated with object locations, which may be stationary or time-varying locations. For example, the decorrelated large audio object audio signals may be rendered to virtual or actual speaker locations. The output of such a rendering process may be input to a scene simplification process. The decorrelation, associating and/or scene simplification processes may be performed prior to a process of encoding the audio data.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: June 19, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Dirk Jeroen Breebaart, Lie Lu, Nicolas R. Tsingos, Antonio Mateos Sole
  • Patent number: RE46924
    Abstract: A motion vector coding unit 117 executes processing including a neighboring block specification step (S100) of specifying a neighboring block which is located in the neighborhood of a current block; a judgment step (Steps S102, S104) of judging whether or not the neighboring block has been coded using a motion vector of another block; a prediction step (S106, S108) of deriving a predictive motion vector of the current block using a motion vector calculated from the motion vector of the other block as a motion vector of the neighboring block; and a coding step (S110) of coding the motion vector of the current block using the predictive motion vector.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: June 26, 2018
    Assignee: Dolby International AB
    Inventors: Satoshi Kondo, Shinya Kadono, Makoto Hagai, Kiyofumi Abe