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

  • Publication number: 20190028827
    Abstract: Audio content coded for a reference speaker configuration is downmixed to downmix audio content coded for a specific speaker configuration. One or more gain adjustments are performed on individual portions of the downmix audio content coded for the specific speaker configuration. Loudness measurements are then performed on the individual portions of the downmix audio content. An audio signal that comprises the audio content coded for the reference speaker configuration and downmix loudness metadata is generated. The downmix loudness metadata is created based at least in part on the loudness measurements on the individual portions of the downmix audio content.
    Type: Application
    Filed: August 28, 2018
    Publication date: January 24, 2019
    Applicants: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Michael Ward, Jeffrey Riedmiller, Scott Gregory Norcross, Alexander Stahlmann
  • Patent number: 10186280
    Abstract: The present invention relates to coding of audio signals, and in particular to high frequency reconstruction methods including a frequency domain harmonic transposer. A system and method for generating a high frequency component of a signal from a low frequency component of the signal is described.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: January 22, 2019
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Per Ekstrand
  • Patent number: 10187432
    Abstract: A method of facilitating the re-joining of a virtual meeting by a participant. The method comprises determining at what time the participant was disconnected from the virtual meeting; and determining whether or not the participant was talking within a time period containing the time at which the participant was disconnected from the virtual meeting. If it is determined that the participant was talking within the time period, then, consequently, the method comprises deciding not to enable the participant to replay stored data representative of a missed portion of the virtual meeting. As well as the method, related apparatuses, systems and computer readable storage media are disclosed.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: January 22, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Rowan James Katekar, Glenn N. Dickins
  • Patent number: 10186211
    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: Grant
    Filed: February 20, 2018
    Date of Patent: January 22, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Lorne A. Whitehead, Helge Seetzen, Gregory John Ward, Wolfgang Heidrich
  • Publication number: 20190019528
    Abstract: The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and/or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor S.
    Type: Application
    Filed: September 19, 2018
    Publication date: January 17, 2019
    Applicant: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10182235
    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: Grant
    Filed: March 30, 2017
    Date of Patent: January 15, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Qian Chen, Peng Yin, Sheng Qu
  • Patent number: 10182207
    Abstract: The disclosure relates to handling nuisance in teleconference system. An endpoint device (400) for use in a teleconference includes an acquiring unit (401), a judging unit (402), a controller (403) and a processing unit (404). The acquiring unit acquires a media stream for presentation in the teleconference, and receives information from another device. The information includes a first estimation on whether the media stream is a nuisance to the teleconference. As the nuisance to a teleconference, audio or video signals are perceived by users as actually not relevant to the conference session or causing unpleasant feeling or confusion. The judging unit decides whether the media stream is the nuisance at least based on the information. The controller controls the processing of the media stream to degrade or suppress the presentation of the media stream in case that the media stream is decided as the nuisance. The processing unit processes the media stream under the control of the controller.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: January 15, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Taoran Lu, Hariharan Ganapathy-Kathirvelu, Peng Yin, Glenn N. Dickins, Xuejing Sun
  • Publication number: 20190013786
    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: Application
    Filed: September 12, 2018
    Publication date: January 10, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Alan J. Seefeldt
  • Publication number: 20190012133
    Abstract: In some embodiments, a method for benchmarking an audio processing algorithm (“APA”) while the APA is executed in a manner simulating expected real time execution by a deployed system. Other embodiments include a method including steps of determining a synthetic APA which corresponds to a counterpart APA (intended for real use by a first deployed system), and benchmarking the synthetic APA while it is executed in a manner simulating expected real time execution of the synthetic APA by a contemplated deployed system. Other aspects include a system or device configured to implement any embodiment of the inventive method, or including a memory which stores data indicative of at least one synthetic APA determined in accordance with, or a benchmark generated by, an embodiment of the inventive method or steps thereof, and a computer readable medium which stores code for implementing any embodiment of the inventive method or steps thereof.
    Type: Application
    Filed: December 17, 2015
    Publication date: January 10, 2019
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Andrew P. REILLY, Marcus ALTMAN, Niall BATTSON, Nicholas ENGEL
  • Publication number: 20190013029
    Abstract: The present disclosure relates to a method of downmixing a plurality of input audio channels. The method include obtaining, for each of the input audio channels, a plurality of frequency coefficients in a plurality of corresponding frequency bins, and applying, for at least one frequency bin, a downmix matrix to a first array formed by the frequency coefficients of the plurality of input audio channels for the respective frequency bin to obtain a second array formed by the frequency coefficients of a plurality of intermediate audio channels for the respective frequency bin. The method further involves determining a third array including only the non-zero entries of the downmix matrix, and determining a fourth array including, for each entry of the third array, an entry indicative of a position of the respective entry of the third array within the downmix matrix.
    Type: Application
    Filed: February 3, 2017
    Publication date: January 10, 2019
    Applicant: Dolby International AB
    Inventor: Vesa RUOPPILA
  • Publication number: 20190013034
    Abstract: The present document relates to audio source coding systems. In particular, the present document relates to audio source coding systems which make use of linear prediction in combination with a filterbank. A method for estimating a first sample (615) of a first subband signal in a first subband of an audio signal is described. The first subband signal of the audio signal is determined using an analysis filterbank (612) comprising a plurality of analysis filters which provide a plurality of subband signals in a plurality of subbands from the audio signal, respectively.
    Type: Application
    Filed: September 12, 2018
    Publication date: January 10, 2019
    Applicant: DOLBY INTERNATIONAL AB
    Inventor: Lars VILLEMOES
  • Patent number: 10176826
    Abstract: Example embodiments disclosed herein relate to source separation in audio content. A method for separating sources from audio content is disclosed, the audio content being of a multi-channel format based on a plurality of channels. The method comprises performing a component analysis on the audio content for each of the plurality of channels to generate a plurality of components, each of the plurality of components comprising a plurality of time-frequency tiles in full frequency band; generating at least one dominant source with at least one of the time-frequency tiles from the plurality of the components and separating the sources from the audio content by estimating spatial parameters and spectral parameters based on the dominant source. Corresponding system and computer program product are also disclosed.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: January 8, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Jun Wang
  • Patent number: 10178400
    Abstract: A system for decoding a video bitstream includes receiving a frame of the video that includes at least one slice and at least one tile and where each of the at least one slice and the at least one tile are not all aligned with one another.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: January 8, 2019
    Assignee: Dolby International AB
    Inventor: Sachin G. Deshpande
  • Patent number: 10176813
    Abstract: Methods for generating encoded audio programs indicative of N channels of discontinuity-corrected, encoded audio content, including by applying discontinuity correction values to multi-channel audio content, and for rendering such a program (e.g., to generate a discontinuity-corrected M-channel mix of content indicated by the program). Other aspects are systems or devices (e.g., encoders or decoders, or rendering systems) configured to implement any of the methods.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: January 8, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Vinay Melkote, David S. McGrath
  • Patent number: 10178386
    Abstract: An image decoding apparatus that includes a motion compensation prediction circuit configured to conduct motion compensation prediction for each of blocks to be decoded by using the reconstructed image, an inverse transformation circuit configured to conduct inverse orthogonal transformation for the data of the blocks to be decoded, and a determination circuit configured to determine a filtering strength and whether or not to conduct filtering, with respect to each of the boundaries. In addition, the determining circuit is configured to determine filtering is conducted when at least one of the two adjacent blocks is intra-coded, and filtering is not conducted when both of the two adjacent blocks are not intra-coded, a non-zero transformation coefficient is not coded in both of the two adjacent blocks, the two adjacent blocks are predicted by the same reference frame, and an absolute value of a difference between motion vectors of the two adjacent blocks is smaller than a specified threshold value.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: January 8, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Shawmin Lei, Hiroyuki Katata
  • Patent number: 10178211
    Abstract: An apparatus may include an inner module, an outer module that substantially surrounds a perimeter of the inner module, a plurality of light emitters, and a light distribution medium. The plurality of light emitters may be positioned under the inner module and project light radially outward. The light distribution medium may transport the light projected from the plurality of light emitters to an edge of the light distribution medium. The edge may include a diffusive surface and traverse a substantial portion of a boundary between the inner module and the outer module.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: January 8, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: David Clementson, David S. McGrath
  • Publication number: 20190007754
    Abstract: An input media signal that carries input media content is received. The input media content is used to generate output media content in an output media signal. It is determined whether identification-and-timing (IAT) data is to be authored for the output media content. In response to determining that the output IAT data is to be authored for the output media content, output IAT data is authored for the output media content. At least a part of the output IAT data for at least a part of the output media content is encoded, along with the part of the output media content, into the output media signal. In some example scenarios, this output media signal then contains the IAT data and other related data for synchronization of additional media content with the output media content in content rendering/presentation operations.
    Type: Application
    Filed: June 29, 2018
    Publication date: January 3, 2019
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Aaron S. MASTER, Marvin PRIBADI
  • Publication number: 20190007703
    Abstract: A method for encoding a LUT defined as a lattice of vertices is disclosed. At least one value is of each vertex of the lattice. The method comprises for a current vertex: predicting the at least one value of said current vertex from another value which is for example obtained from reconstructed values of neighboring vertices; and encoding in a bitstream at least one residue computed between the at least one value of the current vertex and its prediction in a bitstream.
    Type: Application
    Filed: September 10, 2018
    Publication date: January 3, 2019
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Philippe BORDES, Pierre ANDRIVON, Emmanuel JOLLY
  • Publication number: 20190005919
    Abstract: Apparatus and methods for mapping video signal parameters such as tone and color may be applied at various points in a video generation and delivery pipeline. apparatus may be configured to control mappings based on a range of inputs which may include one or more of: ambient conditions, user inputs, control information, adaptation models. Apparatus and methods may be applied to display video or other images so as to preserve a creative intent embodied in video or other image data.
    Type: Application
    Filed: August 20, 2018
    Publication date: January 3, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Helge Seetzen, Robin Atkins, Neil W. Messmer, Gerwin Damberg
  • Publication number: 20190007779
    Abstract: Multi-channel audio content is mixed for a particular loudspeaker setup. However, a consumer's audio setup is very likely to use a different placement of speakers. The present invention provides a method of rendering multi-channel audio that assures replay of the spatial signal components with equal loudness of the signal. A method for obtaining an energy preserving mixing matrix (G) for mixing L1 input audio channels to L2 output channels comprises steps of obtaining a first mixing matrix ?, performing a singular value decomposition on the first mixing matrix ? to obtain a singularity matrix S, processing the singularity matrix S to obtain a processed singularity matrix ?, determining a scaling factor a, and calculating an improved mixing matrix G according to G=a U ? VT. The perceived sound, loudness, timbre and spatial impression of multi-channel audio replayed on an arbitrary loudspeaker setup practically equals that of the original speaker setup.
    Type: Application
    Filed: September 6, 2018
    Publication date: January 3, 2019
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Johannes BOEHM
  • Patent number: 10170131
    Abstract: There is provided a method for enhancing dialog in a decoder of an audio system. The method comprises receiving a plurality of downmix signals being a downmix of a larger plurality of channels; receiving parameters for dialog enhancement being defined with respect to a subset of the plurality of channels that is downmixed into a subset of the plurality of downmix signals; upmixing the subset of downmix signals parametrically in order to reconstruct the subset of the plurality of channels with respect to which the parameters for dialog enhancement are defined; applying dialog enhancement to the subset of the plurality of channels with respect to which the parameters for dialog enhancement are defined using the parameters for dialog enhancement to provide at least one dialog enhanced signal; and subjecting the at least one dialog enhanced signal to mixing to provide dialog enhanced versions of the subset of downmix signals.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 1, 2019
    Assignee: Dolby International AB
    Inventors: Jeroen Koppens, Per Ekstrand
  • Patent number: 10170125
    Abstract: An audio decoding system (100) for processing a two-channel input signal (X) comprises a parametric mixing stage (110). The parametric mixing stage receives the two-channel input signal and a set of mixing parameters (P1), and outputs a two-channel output signal (Y1). The parametric mixing stage comprises a decorrelation stage (111) outputting a decorrelated signal (D1) based on the input signal. The parametric mixing stage further comprises a mixing matrix (112) receiving the input signal and the de-correlated signal, and forming a two-channel linear combination of channels from the input signal and the decorrelated signal. The mixing matrix outputs the linear combination as the two-channel output signal. Coefficients of the linear combination are controllable by the set of mixing parameters, and at least four mixing parameters of the set are independently assignable.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: January 1, 2019
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Leif Jonas Samuelsson, Kristofer Kjoerling, Heiko Purnhagen, Leif Sehlstrom
  • Publication number: 20180374192
    Abstract: A spherical image of a spatial environment is received and contains spherically arranged pixel values indexed by a time value. The spherical image is represented in a content creation coordinate system in reference to a spatial position in the spatial environment. The spatial position is indexed by the time value. A spatial relationship is determined between the content creation coordinate system and a spherical image reference coordinate system. Based at least in part on the spatial relationship and the spherically arranged pixel values, spherical distributions of image metadata are determined for the spherical image.
    Type: Application
    Filed: December 22, 2016
    Publication date: December 27, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Timo KUNKEL, Cristina Michel VASCO, Scott DALY
  • Publication number: 20180376146
    Abstract: Novel methods and systems for encoding standard dynamic range video to improve the final quality after converting standard dynamic range video into enhanced dynamic range video are disclosed. A dual layer codec structure that amplifies certain codeword ranges can be used to send enhanced information to the decoder in order to achieve an enhanced (higher bit depth) image signal. The enhanced standard dynamic range signal can then be up-converted to enhanced dynamic range video without banding artifacts in the areas corresponding to those certain codeword ranges.
    Type: Application
    Filed: July 26, 2016
    Publication date: December 27, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: Guan-Ming SU
  • Publication number: 20180374496
    Abstract: Example embodiments disclosed herein relate to audio signal processing. A method of processing an audio signal is disclosed. The method includes detecting, based on a power distribution of the audio signal, a type of content of a frame of the audio signal, generating a first gain based on a sound level of the frame for adjusting the sound level, processing the audio signal by applying the first gain to the frame; and in response to the type of content being detected to be a breath sound, generating a second gain for mitigating the breath sound and processing the audio signal by applying the second gain to the frame. Corresponding system and computer program product are also disclosed.
    Type: Application
    Filed: December 15, 2016
    Publication date: December 27, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Dong SHI, David GUNAWAN, Glenn N. DICKINS
  • Publication number: 20180373129
    Abstract: A novel spatial light modulator (SLM) includes a cover glass, and modulation layer, and a plurality of pixel mirrors, and separates unwanted, reflected light from desired, modulated light. In one embodiment, a geometrical relationship exists between the cover glass and the pixel mirrors, such that light that reflects from the cover glass is separated from light that reflects from the pixel mirrors and is transmitted from the SLM. In one example, one of the cover glass or the pixel mirrors is angled with respect to the modulation layer. In another example embodiment, the cover glass has a particular thickness, which introduces destructive interference between light that reflects from the top and bottom surfaces of the cover glass. In another embodiment antireflective coatings are disposed between optical interfaces of the SLM. In another embodiment, light from the SLM is directed through an optical filter to remove unwanted light.
    Type: Application
    Filed: June 19, 2018
    Publication date: December 27, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Juan P. PERTIERRA, Martin J. RICHARDS, Barret LIPPEY
  • Patent number: 10165275
    Abstract: A processor for forward reshaping to a target bit depth receives an input image with an input bit depth. The input luminance range is divided into luminance bands and each band is assigned a visual importance index. The output codewords at the target bit depth are divided into codeword bins and each bin is assigned to one of the luminance bands. Each codeword bin is assigned the visual importance index of the luminance band it belongs. Each bin is allocated a number of reshaped codewords according to its visual importance index and a codeword mapping function, where bins with the highest importance index are allocated more codewords than the other bins. A signal reshaping function is generated based on the allocation of codewords, and the reshaping function is applied to the input image to generate an output image in the target bit depth.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: December 25, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Taoran Lu, Fangjun Pu, Peng Yin, Tao Chen, Walter J. Husak
  • Patent number: 10165387
    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: Grant
    Filed: July 13, 2018
    Date of Patent: December 25, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Charles Q. Robinson, Nicolas R. Tsingos, Christophe Chabanne
  • Patent number: 10165384
    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 ?e=?log2(?log2(?{square root over (KMAX)}·O)?+1)?.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: December 25, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger
  • Patent number: 10165251
    Abstract: Stereoscopic video data and corresponding depth map data for stereoscopic and auto-stereoscopic displays are coded using a coded base layer and one or more coded enhancement layers. Given a 3D input picture and corresponding input depth map data, a side-by-side and a top-and-bottom picture are generated based on the input picture. Using an encoder, the side-by-side picture is coded to generate a coded base layer Using the encoder and a texture reference processing unit (RPU), the top-and-bottom picture is encoded to generate a first enhancement layer, wherein the first enhancement layer is coded based on the base layer stream, and using the encoder and a depth-map RPU, depth data for the side-by-side picture are encoded to generate a second enhancement layer, wherein the second enhancement layer is coded based on to the base layer. Alternative single, dual, and multi-layer depth map delivery systems are also presented.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: December 25, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Gopi Lakshminarayanan, Samir Hulyalkar, Tao Chen, Klaas Heinrich Schueuer, Amit Gulati, Hariharan Ganapathy, Philipp Kraetzer
  • Patent number: 10163446
    Abstract: This disclosure falls into the field of audio coding, in particular it is related to the field of spatial audio coding, where the audio information is represented by multiple audio objects including at least one dialog object. In particular the disclosure provides a method and apparatus for enhancing dialog in a decoder in an audio system. Furthermore, this disclosure provides a method and apparatus for encoding such audio objects for allowing dialog to be enhanced by the decoder in the audio system.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: December 25, 2018
    Assignee: Dolby International AB
    Inventors: Jeroen Koppens, Lars Villemoes, Toni Hirvonen, Kristofer Kjoerling
  • Patent number: 10165260
    Abstract: Light from an array of laser light sources are spread to cover the modulating face of a DMD or other modulator. The spread may be performed, for example, by a varying curvature array of lenslets, each laser light directed at one of the lenslets. Light from neighboring and/or nearby light sources overlap at a modulator. The lasers are energized at different energy/brightness levels causing the light illuminating the modulator to itself be modulated (locally dimmed). The modulator then further modulates the locally dimmed lights to produce a desired image. A projector according to the invention may utilize, for example, a single modulator sequentially illuminated or separate primary color modulators simultaneously illuminated.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: December 25, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Martin Richards
  • Patent number: 10163449
    Abstract: The present disclosure provides methods, devices and computer program products for encoding and decoding a stereo audio signal based on an input signal. According to the disclosure, a hybrid approach of using both parametric stereo coding and a discrete representation of the stereo audio signal is used which may improve the quality of the encoded and decoded audio for certain bitrates.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: December 25, 2018
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Kristofer Kjoerling
  • Patent number: 10165288
    Abstract: The precision of up-sampling operations in a layered coding system is preserved when operating on video data with high bit-depth. In response to bit-depth requirements of the video coding or decoding system, scaling and rounding parameters are determined for a separable up-scaling filter. Input data are first filtered across a first spatial direction using a first rounding parameter to generate first up-sampled data. First intermediate data are generated by scaling the first up-sampled data using a first shift parameter. The intermediate data are then filtered across a second spatial direction using a second rounding parameter to generate second up-sampled data. Second intermediate data are generated by scaling the second up-sampled data using a second shift parameter. Final up-sampled data may be generated by clipping the second intermediate data.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: December 25, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Peng Yin, Taoran Lu, Tao Chen
  • Publication number: 20180367939
    Abstract: Systems and methods are described for an adaptive audio system that renders reflected sound for adaptive audio systems in different ways depending on the orientation of at least one speaker in a set of speakers. A speaker of the system may comprise an integrated speaker having front-firing and upward-firing drivers, a sensor to determine the orientation of the speaker (e.g., horizontal or vertical) and a transceiver and control unit that transmits the orientation to a decoder and receives updated speaker feeds from the renderer based on the orientation.
    Type: Application
    Filed: December 14, 2016
    Publication date: December 20, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: David Matthew FISCHER, Warren MANSFIELD, Adam Christopher NOEL, Timothy James EGGERDING, Philip NICOL
  • Publication number: 20180366131
    Abstract: A method for compressing a HOA signal being an input HOA representation with input time frames (C(k)) of HOA coefficient sequences comprises spatial HOA encoding of the input time frames and subsequent perceptual encoding and source encoding. Each input time frame is decomposed (802) into a frame of predominant sound signals (XPS(k?1)) and a frame of an ambient HOA component ({tilde over (C)}AMB(k?1)). The ambient HOA component ({tilde over (C)}AMB(k?1)) comprises, in a layered mode, first HOA coefficient sequences of the input HOA representation (cn(k?1)) in lower positions and second HOA coefficient sequences (cAMB,n(k?1)) in remaining higher positions. The second HOA coefficient sequences are part of an HOA representation of a residual between the input HOA representation and the HOA representation of the predominant sound signals.
    Type: Application
    Filed: August 28, 2018
    Publication date: December 20, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Sven Kordon, Alexander Krueger, Oliver Wuebbolt
  • Publication number: 20180366132
    Abstract: Encoding and decoding devices for encoding the channels of an audio system having at least four channels are disclosed. The decoding device has a first stereo decoding component which subjects a first pair of input channels to a first stereo decoding, and a second stereo decoding component which subjects a second pair of input channels to a second stereo decoding. The results of the first and second stereo decoding components are crosswise coupled to a third and a fourth stereo decoding component which each performs stereo decoding on one channel resulting from the first stereo decoding component, and one channel resulting from the second stereo decoding component.
    Type: Application
    Filed: August 28, 2018
    Publication date: December 20, 2018
    Applicant: Dolby International AB
    Inventors: Kristofer Kjoerling, Harald Mundt, Heiko Purnhagen
  • Publication number: 20180366070
    Abstract: Systems and methods are disclosed for dynamically adjusting the backlight of a display during video playback. Given an input video stream and associated minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the frame min, mid, or max luminance values are filtered using a temporal filter to generate a filtered output value for each frame. The instantaneous dynamic range of a target display is determined based on the filtered output value and the minimum and maximum brightness values of the display. A backlight control level is computed based on the instantaneous dynamic range, and the input signal is tone mapped by a display management process to be displayed on the target display at the selected backlight level. The design of a temporal filter based on an exponential moving average filter and scene-change detection is presented.
    Type: Application
    Filed: May 11, 2016
    Publication date: December 20, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Suzanne FARRELL, Scott DALY, Robin ATKINS, Timo KUNKEL, Gregory John WARD, Samir N. HULYALKAR, Ning XU
  • Publication number: 20180366136
    Abstract: Example embodiments disclosed herein relate to audio signal processing. A method of indicating a presence of a nuisance in an audio signal is disclosed. The method includes determining a probability of the presence of the nuisance in a frame of the audio signal based on a feature of the audio signal, the nuisance representing an unwanted sound made by a user, in response to the probability of the presence of the nuisance exceeding a threshold, tracking the audio signal based on a metric over a plurality of frames following the frame, determining, based on the tracking, that the presence of the nuisance is to be indicated to the user, and in response to the determination, presenting to the user a notification of the presence of the nuisance. Corresponding system and computer program product are also disclosed.
    Type: Application
    Filed: December 14, 2016
    Publication date: December 20, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, David Gunawan, Glenn N. Dickins
  • Publication number: 20180367934
    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: August 28, 2018
    Publication date: December 20, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Johannes BOEHM, Florian KEILER
  • Patent number: 10158959
    Abstract: Sound scenes in 3D can be synthesized or captured as a natural sound field. For decoding, a decode matrix is required that is specific for a given loudspeaker setup and is generated using the known loudspeaker positions. However, some source directions are attenuated for 2D loudspeaker setups like e.g. 5.1 surround. An improved method for decoding an encoded audio signal in soundfield format for L loudspeakers at known positions comprises steps of adding (10) a position of at least one virtual loudspeaker to the positions of the L loudspeakers, generating (11) a 3D decode matrix (D?), wherein the positions ({circumflex over (?)}1 . . . {circumflex over (?)}L) of the L loudspeakers and the at least one virtual position ({circumflex over (?)}L+1?) are used, downmixing (12) the 3D decode matrix (D?), and decoding (14) the encoded audio signal (i14) using the downscaled 3D decode matrix ({tilde over (D)}). As a result, a plurality of decoded loudspeaker signals (q14) is obtained.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: December 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Florian Keiler, Johannes Boehm
  • Patent number: 10158865
    Abstract: Methods, systems, and computer programs for improving compressed image chroma information. In one aspect of the invention, a resolution for a red color component of a color video image is used that is higher than the resolution for a blue color component of the color video image. Another aspect includes utilizing a lower or higher value of a quantization parameter (QP) for one or more chroma channels as compared to the luminance channel Another aspect is use of a logarithmic representation of a video image to benefit image coding. Another aspect uses more than two chroma channels to represent a video image.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: December 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Gary A. Demos
  • Patent number: 10158835
    Abstract: Enhancing image dynamic range is described. An input video signal that is represented in a first color space with a first color gamut, which is related to a first dynamic range, is converted to a video signal that is represented in a second color space with a second color gamut. The second color space is associated with a second dynamic range. At least two (e.g., three) color-related components of the converted video signal are mapped over the second dynamic range.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: December 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Walter Gish, Zhen Li, Donald Pian, Christopher J. Vogt, Hyung-Suk Kim, David Ruhoff
  • Patent number: 10157592
    Abstract: Techniques for optimizing light output profiles in display systems are described. A light output profile is defined in relation to a plurality of sample locations on an illuminated surface. Point spread functions that satisfy illumination performance values specified in the light output profile in aggregate are computed or derived. A design process that adds or removes optical components to a display light assembly derives an optimal design of a light illumination layer for display systems. Relationships and parameter values determined in the design process may be configured into display systems along with the optical components for the purpose of generating optimized light output profiles in the display systems.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: December 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Henry Hang-Kei Ip, Chun Chi Wan, Ka Wing Terence Lau
  • Patent number: 10157623
    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: December 1, 2017
    Date of Patent: December 18, 2018
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Lars Villemoes
  • Patent number: 10155164
    Abstract: A method and system for using spatial audio in a virtual environment, which is capable of running on portable devices with limited processing power, and utilizing low bandwidth communication connections. The system identifies a first avatar in the virtual environment; and determines if the avatar satisfies a reuse criterion, which will enable the system to reuse the audio information which has been generated for a second avatar in the virtual environment for the first avatar.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: December 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Paul Andrew Boustead, Farzad Safaei
  • Patent number: 10158958
    Abstract: Audio perception in local proximity to visual cues is provided. A device includes a video display, first row of audio transducers, and second row of audio transducers. The first and second rows can be vertically disposed above and below the video display. An audio transducer of the first row and an audio transducer of the second row form a column to produce, in concert, an audible signal. The perceived emanation of the audible signal is from a plane of the video display (e.g., a location of a visual cue) by weighing outputs of the audio transducers of the column. In certain embodiments, the audio transducers are spaced farther apart at a periphery for increased fidelity in a center portion of the plane and less fidelity at the periphery.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: December 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Christophe Chabanne, Nicolas R. Tsingos, Charles Q. Robinson
  • Publication number: 20180359596
    Abstract: A method of encoding channel or object based input audio for playback, the method including the steps of: (a) initially rendering the channel or object based input audio into an initial output presentation; (b) determining an estimate of the dominant audio component from the channel or object based input audio and determining a series of dominant audio component weighting factors for mapping the initial output presentation into the dominant audio component; (c) determining an estimate of the dominant audio component direction or position; and (d) encoding the initial output presentation, the dominant audio component weighting factors, the dominant audio component direction or position as the encoded signal for playback.
    Type: Application
    Filed: November 17, 2016
    Publication date: December 13, 2018
    Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL AB
    Inventors: Dirk Jeroen BREEBAART, David Matthew COOPER, Mark F. DAVIS, David S. McGRATH, Kristofer KJOERLING, Harald MUNDT, Rhonda J. WILSON
  • Publication number: 20180358028
    Abstract: Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A method of processing an audio signal comprises receiving an audio signal, classifying the audio signal as one of pure sinusoidal, hybrid, or pure transient signal using two defined threshold values, and selectively applying a companding operation by switching between a companding off mode, a companding on mode, and an average companding mode, comprising selecting between the companding on mode and the average companding mode for a classified hybrid signal using a companding rule that uses a temporal sharpness measure in a frequency domain.
    Type: Application
    Filed: October 27, 2016
    Publication date: December 13, 2018
    Applicant: DOLBY INTERNATIONAL AB
    Inventor: Arijit BISWAS
  • Patent number: RE47202
    Abstract: Adjacent blocks are identified in an image. Coding parameters for the adjacent blocks are identified. Deblock filtering between the identified adjacent blocks is skipped if the coding parameters for the identified adjacent blocks are similar and not skipped if the coding parameters for the identified adjacent blocks are substantially different.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: January 8, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Shijun Sun, Shawmin Lei