Dolby Labs Patent Applications

Patents granted to Dolby Labs by the U.S. Patent and Trademark Office (USPTO).

  • Publication number: 20180197562
    Abstract: Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
    Type: Application
    Filed: March 8, 2018
    Publication date: July 12, 2018
    Applicants: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Per Hedelin, Arijit Biswas, Michael Schug, Vinay Melkote
  • Publication number: 20180199130
    Abstract: A time heuristic audio control system, comprises a receiver for receiving time-based data from a personal computing device and a memory storing one or more sets processing parameters comprising instructions for processing the ambient sound based upon the time-based data. The system further includes a processor coupled to the memory and the receiver configured to adjust the ambient sound as directed by a selected set of processing parameters retrieved from the memory to create adjusted audio, the selected set of processing parameters retrieved based upon the time-based data and at least one speaker for outputting the adjusted audio.
    Type: Application
    Filed: March 9, 2018
    Publication date: July 12, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Matthew J. Jaffe, Noah Kraft, Richard Fritz Lanman, III, Jeffrey Baker
  • Publication number: 20180197561
    Abstract: Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
    Type: Application
    Filed: March 7, 2018
    Publication date: July 12, 2018
    Applicants: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Per Hedelin, Arijit Biswas, Michael Schug, Vinay Melkote
  • Publication number: 20180191912
    Abstract: Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations disclosed herein involve receiving audio data corresponding to a recording of at least one conference involving a plurality of conference participants. In some examples, only a portion of the received audio data will be selected as playback audio data. The selection process may involve a topic selection process, a talkspurt filtering process and/or an acoustic feature selection process. Some examples involve receiving an indication of a target playback time duration. Selecting the portion of audio data may involve making a time duration of the playback audio data within a threshold time difference of the target playback time duration.
    Type: Application
    Filed: February 3, 2016
    Publication date: July 5, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Richard J. CARTWRIGHT, Xuejing SUN
  • Publication number: 20180192230
    Abstract: Embodiments are described for an adaptive audio system that processes audio data comprising a number of independent monophonic audio streams. One or more of the streams has associated with it metadata that specifies whether the stream is a channel-based or object-based stream. Channel-based streams have rendering information encoded by means of channel name; and the object-based streams have location information encoded through location expressions encoded in the associated metadata. A codec packages the independent audio streams into a single serial bitstream that contains all of the audio data. This configuration allows for the sound to be rendered according to an allocentric frame of reference, in which the rendering location of a sound is based on the characteristics of the playback environment (e.g., room size, shape, etc.) to correspond to the mixer's intent.
    Type: Application
    Filed: February 26, 2018
    Publication date: July 5, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Charles Q. ROBINSON, Nicolas R. TSINGOS, Christophe CHABANNE
  • Publication number: 20180190266
    Abstract: Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations disclosed herein involve receiving speech recognition results data, including a plurality of speech recognition lattices and a word recognition confidence score for each of a plurality of hypothesized words of the speech recognition lattices, for a conference recording. A primary word candidate and alternative word hypotheses may be determined for hypothesized words in the speech recognition lattices. A term frequency metric may be calculated for sorting the primary word candidates and the alternative word hypotheses. Hypothesized words may be rescored according to an alternative hypothesis list.
    Type: Application
    Filed: February 3, 2016
    Publication date: July 5, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Xuejing SUN, Richard J. CARTWRIGHT
  • Publication number: 20180190215
    Abstract: Dual modulator displays are disclosed incorporating a phosphorescent plate interposed in the optical path between a light source modulation layer and a display modulation layer. Spatially modulated light output from the light source modulation layer impinges on the phosphorescent plate and excites corresponding regions of the phosphorescent plate which in turn emit light having different spectral characteristics than the light output from the light source modulation layer. Light emitted from the phosphorescent plate is received and further modulated by the display modulation layer to provide the ultimate display output.
    Type: Application
    Filed: February 26, 2018
    Publication date: July 5, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Lorne A. Whitehead, Gregory John Ward, Louis D. Silverstein, Helge Seetzen
  • Publication number: 20180192062
    Abstract: In a decoder, a processor extracts a control map of false contour filtering from a part of a multi-layer video signal that includes a low dynamic range image mapped from an original high-dynamic range (HDR) image. It determines one or more filter parameters for a sparse finite-impulse-response (FIR) filter, where the one or more filter parameters relate to at least in part on the control map of false contour filtering and a predicted image predicted from the low dynamic range image. It applies the sparse FIR filter to filter pixel values in a portion of the predicted image based at least in part on the control map of false contour filtering, and it reconstructs a version of the original HDR image based at least in part on the portion of the predicted image as filtered by the FIR filter.
    Type: Application
    Filed: March 30, 2017
    Publication date: July 5, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Qian Chen, Peng Yin, Sheng Qu
  • Publication number: 20180192186
    Abstract: Input audio data, including first microphone audio signals and second microphone audio signals output by a pair of coincident, vertically-stacked directional microphones, may be received. An azimuthal angle corresponding to a sound source location may be determined, based at least in part on an intensity difference between the first microphone audio signals and the second microphone audio signals. An elevation angle corresponding to a sound source location may be determined, based at least in part on a temporal difference between the first microphone audio signals and the second microphone audio signals. Output audio data, including at least one audio object corresponding to a sound source, may be generated. The audio object may include audio object signals and associated audio object metadata. The audio object metadata may include at least audio object location data corresponding to the sound source location.
    Type: Application
    Filed: July 1, 2016
    Publication date: July 5, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Nicolas R. TSINGOS
  • Publication number: 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: 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: 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
  • 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: 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: 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: 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: 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: 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: 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: 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
  • 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: 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: 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: 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: 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
  • 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: 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: 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: 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: 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: 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
  • 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: 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: 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: 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: 20180151186
    Abstract: Methods and audio processing units for generating an object based audio program including conditional rendering metadata corresponding to at least one object channel of the program, where the conditional rendering metadata is indicative of at least one rendering constraint, based on playback speaker array configuration, which applies to each corresponding object channel, and methods for rendering audio content determined by such a program, including by rendering content of at least one audio channel of the program in a manner compliant with each applicable rendering constraint in response to at least some of the conditional rendering metadata. Rendering of a selected mix of content of the program may provide an immersive experience.
    Type: Application
    Filed: January 29, 2018
    Publication date: May 31, 2018
    Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL AB
    Inventors: Sripal S. MEHTA, Thomas ZIEGLER, Stewart MURRIE
  • Publication number: 20180152678
    Abstract: Dual or multi-modulation display systems comprising a first modulator and a second modulator are disclosed. The first modulator may comprise a plurality of analog mirrors (e.g. MEMS array) and the second modulator may comprise a plurality of mirrors (e.g., DMD array). The display system may further comprise a controller that sends control signals to the first and second modulator. The display system may render highlight features within a projected image by affecting a time multiplexing scheme. In one embodiment, the first modulator may be switched on a sub-frame basis such that a desired proportion of the available light may be focused or directed onto the second modulator to form the highlight feature on a sub-frame rendering basis.
    Type: Application
    Filed: January 25, 2018
    Publication date: May 31, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Martin J. Richards
  • Publication number: 20180152803
    Abstract: An audio processing system and method which calculates, based on spatial metadata of the audio object, a panning coefficient for each of the audio objects in relation to each of a plurality of predefined channel coverage zones. Converts the audio signal into submixes in relation to the predefined channel coverage zones based on the calculated panning coefficients and the audio objects. Each of the submixes indicating a sum of components of the plurality of the audio objects in relation to one of the predefined channel coverage zones. Generating a submix gain by applying an audio processing to each of the submix and controls an object gain applied to each of the audio objects. The object gain being as a function of the panning coefficients for each of the audio objects and the submix gains in relation to each of the predefined channel coverage zones.
    Type: Application
    Filed: May 26, 2016
    Publication date: May 31, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Alan J. SEEFELDT, Lie LU, Chen ZHANG
  • Publication number: 20180152719
    Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.
    Type: Application
    Filed: January 24, 2018
    Publication date: May 31, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Purvin Bibhas PANDIT, Peng YIN, Dong TIAN
  • 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
  • Publication number: 20180151189
    Abstract: On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (?) from the bitstream, where 1?m<n. Also derived from the bitstream are pre-processing dynamic range control, DRC, parameters (DRC2) quantifying an encoder-side dynamic range limiting of the core signal. The n-channel audio signal is obtained by parametric synthesis in accordance with the multichannel coding parameters and while cancelling any encoder-side dynamic range limiting based on the pre-processing DRC parameters. In particular embodiments, the reconstruction further includes use of compensated post-processing DRC parameters quantifying a potential decoder-side dynamic range compression. Cancellation of an encoder-side range limitation and range compression are preferably performed by different decoder-side components. Cancellation and compression may be coordinated by a DRC pre-processor.
    Type: Application
    Filed: January 26, 2018
    Publication date: May 31, 2018
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Jeffrey RIEDMILLER, Karl J. ROEDEN, Kristofer KJOERLING, Heiko PURNHAGEN, Vinay MELKOTE, Leif SEHLSTROM
  • 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: 20180146198
    Abstract: Video images are rendered in viewports of content viewers. Each content viewer views video images through a respective viewport in the viewports. Spatial locations in the video images to which foveal visions of the content viewers are directed are determined. ROIs in the video images are identified based on the spatial locations in the video images.
    Type: Application
    Filed: November 17, 2017
    Publication date: May 24, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Chaitanya ATLURU, Ajit NINAN
  • Publication number: 20180146288
    Abstract: An apparatus and method are disclosed for processing an audio signal. The apparatus includes an input interface, a digital filterbank having an analysis part and a synthesis part, a first phase shifter, a spectral envelope adjuster, a second phase shifter, and an output interface. The first phase shifter and the second phase shifter reduce a complexity of the digital filterbank, which includes both analysis and synthesis filters that are complex-exponential modulated versions of a prototype filter.
    Type: Application
    Filed: January 22, 2018
    Publication date: May 24, 2018
    Applicant: Dolby International AB
    Inventor: Per Ekstrand
  • Publication number: 20180146176
    Abstract: Apparatus for controlling a spatial light modulator (106) of an image projector (100), the image projector further comprising an illumination source (102) arranged to illuminate the spatial light modulator (106), the apparatus comprising an input (126) for receiving image data, an output for outputting image data and a controller (110) in communication with the input and the output, the controller (110) being configured to: •determine an estimated thermal state of the projector; •use at least the estimated thermal state of the projector to obtain an expected illumination pattern of light incident on the spatial light modulator (106) when illuminated by the illumination source (102); •use the expected illumination pattern to adjust the received image data so as to compensate for thermal changes in one or more components of the image projector; and •output the adjusted image data to the spatial light modulator (106).
    Type: Application
    Filed: May 6, 2016
    Publication date: May 24, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Christopher John ORLICK, Jerome D. SHIELDS
  • Publication number: 20180146185
    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: Application
    Filed: January 22, 2018
    Publication date: May 24, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Walter J. Husak, David Ruhoff, Alexandros Tourapis, Athanasios Leontaris
  • Publication number: 20180144753
    Abstract: The application relates to HFR (High Frequency Reconstruction/Regeneration) of audio signals. In particular, the application relates to a method and system for performing HFR of audio signals having large variations in energy level across the low frequency range which is used to reconstruct the high frequencies of the audio signal. A system configured to generate a plurality of high frequency subband signals covering a high frequency interval from a plurality of low frequency subband signals is described.
    Type: Application
    Filed: January 16, 2018
    Publication date: May 24, 2018
    Applicant: Dolby International AB
    Inventor: Kristofer Kjoerling
  • Publication number: 20180144751
    Abstract: The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.
    Type: Application
    Filed: January 17, 2018
    Publication date: May 24, 2018
    Applicant: Dolby International AB
    Inventors: Heiko Purnhagen, Pontus Carlsson, Kristofer Kjoerling
  • Publication number: 20180144692
    Abstract: Systems and methods are disclosed for filtering metadata to be used in display management. Given an input video stream and input metadata comprising at least one of minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the input metadata are filtered using a temporal filter to generate filtered metadata, wherein the filtering is based only on metadata for input frames in the same scene. Methods for temporal filtering based on an exponential moving average filter or a look-ahead sliding window filter are presented, including methods for scene-change detection using the input metadata.
    Type: Application
    Filed: May 11, 2016
    Publication date: May 24, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Robin ATKINS, Gregory John WARD, Samir N. HULYALKAR, Guan-Ming SU, Sheng QU