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: 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
  • Publication number: 20180164665
    Abstract: Projection systems and/or methods for efficient use of light by recycling a portion of the light energy are disclosed. In one embodiment, a projection display system is disclosed comprising a light source; an integrated rod that receives light from said light source at a proximal end that comprise a reflective surface which may reflecting/recycle light down said integrating rod; and a modulator comprising at least one moveable mirror that reflects light received from the integrating rod in either a projection direction or a light recycling direction. In other embodiments, dual and multiple modulator projector display systems are disclosed. A first modulator may affect either a pre-modulated halftone image or may affect a highlights modulated image for a desired image to be displayed. A second modulator may be provided for primary modulation of a desired image.
    Type: Application
    Filed: June 19, 2015
    Publication date: June 14, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Douglas J. GORNY, Martin J. RICHARDS
  • Publication number: 20180167515
    Abstract: Example embodiments disclosed herein relate to audio signal processing based on remote user control. A method of processing an audio signal in an audio sender device is disclosed. The method includes receiving, at a current device, a control parameter from a remote device, the control parameter being generated based on a user input of the remote device and specifying a user preference for an audio signal to be transmitted to the remote device. The method also includes processing the audio signal based on the received control parameter and transmitting the processed audio signal to the remote device. Corresponding computer program product of processing an audio signal and corresponding device are also disclosed. Corresponding method in an audio receiver device and computer program product of processing an audio signal as well as corresponding device are also disclosed.
    Type: Application
    Filed: May 26, 2016
    Publication date: June 14, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Dong SHI, Xuejing SUN, Zhiwei SHUANG
  • Publication number: 20180167616
    Abstract: The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).
    Type: Application
    Filed: February 6, 2018
    Publication date: June 14, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Walter C. Gish, Christopher J. Vogt
  • Publication number: 20180165796
    Abstract: Several implementations relate, for example, to depth encoding and/or filtering for 3D video (3DV) coding formats. A sparse dyadic mode (308) for partitioning macroblocks (MBs) along edges in a depth map is provided as well as techniques for trilateral (or bilateral) filtering of depth maps that may include adaptive selection between filters sensitive to changes in video intensity and/or changes in depth. One implementation partitions a depth picture, and then refines the partitions based on a corresponding image picture. Another implementation filters a portion of a depth picture based on values for a range of pixels in the portion. For a given pixel in the portion that is being filtered, the filter weights a value of a particular pixel in the range by a weight that is based on one or more of location distance, depth difference, and image difference.
    Type: Application
    Filed: January 26, 2018
    Publication date: June 14, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Wang Lin LAI, Shujie LIU, Dong TIAN
  • Publication number: 20180164602
    Abstract: A speckle damping system for dampening speckle on a projection screen for a projection display system employing coherent or partially coherent light sources (e.g., lasers, LEDs) are disclosed. In one embodiment, a rotatably coupled system is disclosed, comprising: a set of actuators; a set of rotatably coupled mounts, each of said set of rotatably coupled mount capable of mounting at least one said actuator; and wherein said at least one actuator mounted on said rotatably coupled mount is in moveable mechanical communication with said projection screen. In another embodiment, a linearly coupled system is disclosed comprising: a set of actuators; a set of linearly coupled mounts, each of said set of linearly coupled mount capable of mounting at least one said actuator; and wherein said at least one actuator mounted on said linearly coupled mount is in moveable mechanical communication with said projection screen.
    Type: Application
    Filed: February 8, 2018
    Publication date: June 14, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Brad BASLER, Trevor DAVIES, Douglas J. GORNY, Wilson ALLEN
  • Publication number: 20180166084
    Abstract: When decompressing 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: Application
    Filed: February 7, 2018
    Publication date: June 14, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Alexander KRUEGER, Sven KORDON
  • Publication number: 20180167581
    Abstract: Systems and methods are described for determining orientation of an external audio device in a video conference, which may be used to provide congruent multimodal representation for a video conference. A camera of a video conferencing system may be used to detect a potential location of an external audio device within a room in which the video conferencing system is providing a video conference. Within the detected potential location, a visual pattern associated with the external audio device may be identified. Using the identified visual pattern, the video conferencing system may estimate an orientation of the external audio device, the orientation being used by the video conferencing system to provide spatial audio video congruence to a far end audience.
    Type: Application
    Filed: December 12, 2017
    Publication date: June 14, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Erwin GOESNAR, Hannes MUESCH, David GUNAWAN, Michael ECKERT, Glenn N. DICKINS
  • Publication number: 20180167756
    Abstract: Multiple virtual source locations may be defined for a volume within which audio objects can move. A set-up process for rendering audio data may involve receiving reproduction speaker location data and pre-computing gain values for each of the virtual sources according to the reproduction speaker location data and each virtual source location. The gain values may be stored and used during “run time,” during which audio reproduction data are rendered for the speakers of the reproduction environment. During run time, for each audio object, contributions from virtual source locations within an area or volume defined by the audio object position data and the audio object size data may be computed. A set of gain values for each output channel of the reproduction environment may be computed based, at least in part, on the computed contributions. Each output channel may correspond to at least one reproduction speaker of the reproduction environment.
    Type: Application
    Filed: February 12, 2018
    Publication date: June 14, 2018
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Antonio MATEOS SOLE, Nicolas R. TSINGOS
  • Publication number: 20180167637
    Abstract: In a method to improve the coding efficiency of high-dynamic range (HDR) images, a decoder parses sequence processing set (SPS) data from an input coded bitstream to detect that an HDR extension syntax structure is present in the parsed SPS data. It extracts from the HDR extension syntax structure post-processing information that includes one or more of a color space enabled flag, a color enhancement enabled flag, an adaptive reshaping enabled flag, a dynamic range conversion flag, a color correction enabled flag, or an SDR viewable flag. It decodes the input bitstream to generate a preliminary output decoded signal, and generates a second output signal based on the preliminary output signal and the post-processing information.
    Type: Application
    Filed: July 14, 2016
    Publication date: June 14, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Peng YIN, Taoran LU, Fangjun PU, Tao CHEN, Walter J. HUSAK
  • Patent number: 9997164
    Abstract: Methods for generating an object based audio program which is renderable in a personalizable manner, e.g., to provide an immersive, perception of audio content of the program. Other embodiments include steps of delivering (e.g., broadcasting), decoding, and/or rendering such a program. Rendering of audio objects indicated by the program may provide an immersive experience. The audio content of the program may be indicative of multiple object channels (e.g., object channels indicative of user-selectable and user-configurable objects, and typically also a default set of objects which will be rendered in the absence of a selection by a user) and a bed of speaker channels. Another aspect is an audio processing unit (e.g., encoder or decoder) configured to perform, or which includes a buffer memory which stores at least one frame (or other segment) of an object based audio program (or bitstream thereof) generated in accordance with, any embodiment of the method.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: June 12, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Robert Andrew France, Thomas Ziegler, Sripal S. Mehta, Andrew Jonathan Dowell, Prinyar Saungsomboon, Michael David Dwyer, Farhad Farahani, Nicolas R. Tsingos, Freddie Sanchez
  • Publication number: 20180160249
    Abstract: Decoding of Ambisonics representations for a stereo loudspeaker setup is known for first-order Ambisonics audio signals. But such first-order Ambisonics approaches have either high negative side lobes or poor localisation in the frontal region. The invention deals with the processing for stereo decoders for higher-order Ambisonics HOA. The desired panning functions can be derived from a panning law for placement of virtual sources between the loudspeakers. For each loudspeaker a desired panning function for all possible input directions at sampling points is defined. The panning functions are approximated by circular harmonic functions, and with increasing Ambisonics order the desired panning functions are matched with decreasing error. For the frontal region between the loudspeakers, a panning law like the tangent law or vector base amplitude panning (VBAP) are used. For the rear directions panning functions with a slight attenuation of sounds from these directions are defined.
    Type: Application
    Filed: January 22, 2018
    Publication date: June 7, 2018
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Florian KEILER, Johannes BOEHM
  • Publication number: 20180157149
    Abstract: A device for quasi-phase-matched frequency doubling of broadband light with uncorrelated spectral phase includes a nonlinear optical material, which in turn includes a domain-reversed grating organized in a series of sections along propagation direction of the broadband light through the nonlinear optical material. Each of the sections is characterized by a respective period of the domain-reversed grating. The period within a first connected subset of the series alternates between two discrete values along the propagation direction. A method for designing the domain-reversed grating includes determining a grating function model describing an ideal nonlinear coefficient of a domain-reversed grating, and discretizing the grating function model to a manufacturable grating function having period restricted to a discrete set of manufacturable periods.
    Type: Application
    Filed: November 27, 2017
    Publication date: June 7, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Alireza MARANDI, Gennady IMESHEV, Dzhakhangir V. KHAYDAROV, Gregory David MILLER
  • Publication number: 20180160089
    Abstract: An existing metadata set that is specific to a color volume transformation model is transformed to a metadata set that is specific to a distinctly different color volume transformation model. For example, source content metadata for a first color volume transformation model is received. This source metadata determines a specific color volume transformation, such as a sigmoidal tone map curve. The specific color volume transformation is mapped to a color volume transformation of a second color volume transformation model, e.g., a Bézier tone map curve. Mapping can be a best fit curve, or a reasonable approximation. Mapping results in metadata values used for the second color volume transformation model (e.g., one or more Bézier curve knee points and anchors). Thus, devices configured for the second color volume transformation model can reasonably render source content according to received source content metadata of the first color volume transformation model.
    Type: Application
    Filed: January 25, 2018
    Publication date: June 7, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Raymond YEUNG, Patrick GRIFFIS, Thaddeus BEIER, Robin ATKINS
  • Publication number: 20180155944
    Abstract: Theater designs including social media, and theater entrances configured to draw patrons into a main area of the theater including an entrance having a curved wall and curved walkway having a horizon drop-off for display of content related to a motion picture or other feature to be shown in the theater. The content may be interactive or otherwise linked to patrons passing a hallway including the curved wall. Spatialized sound corresponding to the video “moves” with objects in the video and with patrons as they traverse walkway.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 7, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Douglas J. GORNY, Wilhelm OEHL, Vincent VORON, David HERMAN, Donald BURLOCK, Pascal SIJEN, Christopher Roy KUKSHTEL, C. Matthew CUSON, Charles Q. ROBINSON
  • Publication number: 20180160236
    Abstract: A method, a system and a computer program product are disclosed for enhancing an audio signal in relation to a hearing impairment. An input signal is obtained comprising input sub-band signals in a frequency range comprising a source range and a target range. The input sub-band signals in the source range are selectively transposed into transposed sub-band signals in the target range according to a predefined transposing rule. A masking threshold is determined based on a predefined perceptual model and perceptually relevant sub-band signals of the transposed sub-band signals in the target range exceeding the masking threshold are detected. Input sub-band signals in the target range are selectively replaced with corresponding detected perceptually relevant sub-band signals of the transposed sub-band signals in the target range.
    Type: Application
    Filed: May 4, 2016
    Publication date: June 7, 2018
    Applicant: Dolby International AB
    Inventor: Arijit BISWAS
  • Publication number: 20180157054
    Abstract: Shaped glasses have curved surface lenses and spectrally complementary filters disposed on the curved surface lenses configured to compensate for wavelength shifts occurring due to viewing angles and other sources. The spectrally complementary filters include guard bands to prevent crosstalk between spectrally complementary portions of a 3D image viewed through the shaped glasses. In one embodiment, the spectrally complementary filters are disposed on the curved lenses with increasing layer thickness towards edges of the lenses. The projected complementary images may also be pre-shifted to compensate for subsequent wavelength shifts occurring while viewing the images.
    Type: Application
    Filed: January 29, 2018
    Publication date: June 7, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Martin J. Richards, Wilson Heaton Allen
  • Patent number: 9992600
    Abstract: Multiple virtual source locations may be defined for a volume within which audio objects can move. A set-up process for rendering audio data may involve receiving reproduction speaker location data and pre-computing gain values for each of the virtual sources according to the reproduction speaker location data and each virtual source location. The gain values may be stored and used during “run time,” during which audio reproduction data are rendered for the speakers of the reproduction environment. During run time, for each audio object, contributions from virtual source locations within an area or volume defined by the audio object position data and the audio object size data may be computed. A set of gain values for each output channel of the reproduction environment may be computed based, at least in part, on the computed contributions. Each output channel may correspond to at least one reproduction speaker of the reproduction environment.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: June 5, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Antonio Mateos Sole, Nicolas R. Tsingos
  • Patent number: 9992460
    Abstract: Dual and multi-modulator projector display systems and techniques are disclosed. In one embodiment, a projector display system comprises a light source; a controller, a first modulator, receiving light from the light source and rendering a halftone image of said the input image; a blurring optical system that blurs said halftone image with a Point Spread Function (PSF); and a second modulator receiving the blurred halftone image and rendering a pulse width modulated image which may be projected to form the desired screen image. Systems and techniques for forming a binary halftone image from input image, correcting for misalignment between the first and second modulators and calibrating the projector system—e.g. overtime—for continuous image improvement are also disclosed.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: June 5, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jerome Shields, Martin J. Richards, Juan P. Pertierra
  • Patent number: 9990934
    Abstract: Higher Order Ambisonics represents three-dimensional sound independent of a specific loudspeaker set-up. However, transmission of an HOA representation results in a very high bit rate. Therefore compression with a fixed number of channels is used, in which directional and ambient signal components are processed differently. For coding, portions of the original HOA representation are predicted from the directional signal components. This prediction provides side information which is required for a corresponding decoding. By using some additional specific purpose bits, a known side information coding processing is improved in that the required number of bits for coding that side information is reduced on average.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: June 5, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexander Krueger, Sven Kordon, Oliver Wuebbolt
  • Patent number: 9992601
    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: June 5, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 9990929
    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: June 5, 2018
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Lars Villemoes
  • Patent number: 9992476
    Abstract: Stereoscopic images are subsampled and placed in a “checkerboard” pattern in an image. The image is encoded in a monoscopic video format. The monoscopic video is transmitted to a device where the “checkerboard” is decoded. Portions of the checkerboard (e.g., “black” portions) are used to reconstruct one of the stereoscopic images and the other portion of the checkerboard (e.g., “white” portions) are used to reconstruct the other image. The subsamples are, for example, taken from the image in a location coincident to the checkerboard position in which the subsamples are encoded.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: June 5, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Walter J. Husak, David Ruhoff, Alexandros Tourapis, Athanasios Leontaris
  • Patent number: 9992507
    Abstract: Methods for decoding a video bitstream. One of the methods includes receiving a respective buffer description for each of one or more decoded reference pictures from the video bitstream; wherein the respective buffer descriptions include a poc cycle parameter for one or more long term reference pictures in the one or more decoded reference pictures, and wherein the poc cycle parameter is used to calculate a picture order count (POC) for the decoded long term reference pictures; identifying one or more decoded reference pictures for a current picture from a decoded picture buffer, based on the POC for the decoded long term reference pictures; decoding the current picture using inter-frame prediction based on the identified one or more decoded reference pictures; and buffering the decoded picture in the decoded picture buffer.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: June 5, 2018
    Assignee: Dolby International AB
    Inventors: Kiran Misra, Sachin G. Deshpande, Christopher A. Segall
  • Patent number: 9990749
    Abstract: Systems and methods for perceptually synchronizing at least one secondary display that is in a same visual environment as a primary display. The image appearance parameters may be derived from the image/video shown on the primary display can be used to map the appearance of any arbitrary content on a secondary device. To produce a visually pleasing environment for a viewer in the visual environment, systems and methods are herein disclosed for synchronizing the display settings or parameters. The synchronization may be affected by dynamically adjusting the image data rendered upon one of the primary and/or secondary displays. Such dynamic adjustments may be made in accordance with the characteristics of the primary display and/or secondary display. Such adjustments may be made to the dynamic range, color mapping, etc. of the rendering on either display.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: June 5, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Timo Kunkel
  • Patent number: 9990935
    Abstract: The present document relates to the design of anti-aliasing and/or anti-imaging filters for resamplers using rational resampling factors. In particular, the present document relates to a method for implementing such anti-aliasing and/or anti-imaging filters with reduced computational complexity. In addition, the present document relates to further aspects of an audio encoding and decoding system, such as the phase relation between the channels of a multi-channel audio signal and/or the structure of the bitstream of an encoded audio signal.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: June 5, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Alexander Groeschel, Jens Popp, Martin Wolters, Jeffrey Riedmiller, Michael Ward, Karl Jonas Roeden, Holger Hoerich, Karsten Linzmeier, Tobias Friedrich
  • Publication number: 20180151170
    Abstract: The disclosure relates to combined active noise cancellation and noise compensation in a headphone. An audio processing device includes a selector and a noise compensation unit. The selector can select one of a plurality of first transfer functions based on at least one feature of at least one of an external noise and a content audio signal representing a sound to be reproduced through the headphone. The noise compensation unit can compute a second audio signal by applying the selected first transfer function to a first audio signal, and derive gains for the noise compensation at least based on the second audio signal. The at least one feature can be used to distinguish at least two of the first transfer functions. Each of the first transfer functions can transform the first audio signal to the second audio signal which is assumed as representing a version of the sound represented by the first audio signal, which arrives at an eardrum of a listener wearing the headphone.
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guilin MA, Xiguang ZHENG
  • Publication number: 20180151188
    Abstract: Apparatus and methods for generating an encoded audio bitstream, including by including program loudness metadata and audio data in the bitstream, and optionally also program boundary metadata in at least one segment (e.g., frame) of the bitstream. Other aspects are apparatus and methods for decoding such a bitstream, e.g., including by performing adaptive loudness processing of the audio data of an audio program indicated by the bitstream, or authentication and/or validation of metadata and/or audio data of such an audio program. Another aspect is an audio processing unit (e.g., an encoder, decoder, or post-processor) configured (e.g., programmed) to perform any embodiment of the method or which includes a buffer memory which stores at least one frame of an audio bitstream generated in accordance with any embodiment of the method.
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Michael GRANT, Scott Gregory NORCROSS, Jeffrey RIEDMILLER, Michael WARD
  • Patent number: D819625
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: June 5, 2018
    Assignee: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Peter Michaelian, Grayson H. Byrd, Christine Anna Naples
  • 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