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: 10114838
    Abstract: Scene-referred metadata comprising correspondence relationships between coded values used in generated images and reference values defined independent of any specific image may be provided as a part of image metadata for the generated images. Downstream image processing devices or image rendering devices may use the scene-referred metadata to perform image processing or rendering operations. When coded values of input images are altered in corresponding output images, the scene-referred metadata may be updated with new coded values used in the output images. Reference values refer to reference color values or reference gray levels. Coded values refer to color values or gray levels coded in pixels or sub-pixels of one or more images.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: October 30, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Arshad Ali, Peter Longhurst, Eric Kozak
  • Patent number: 10114224
    Abstract: Discrete light fiber inputs for high powered image projector display systems are disclosed herein. Various embodiments disclosed herein may employ a bundle of light fiber inputs, a diffuser and reducing relay optic to convert the fiber input array into a smaller pattern of spots that may be interfaced to a projector display system that may perform light recycling. Many embodiments herein may facilitate higher power laser light for illumination and, possibly, recycling. In these embodiments, laser fibers may be individually collimated and illuminate a diffuser. The diffuser spots may be then imaged through a common path relay that can be resized to allow room for the individual lasers and collimation lenses. The diffuser spots may be imaged through holes in a mirror that is on the input side of an integration rod which recycles the light.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: October 30, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Duane Scott Dewald, Nathan Wainwright, Douglas J. Gorny, Martin J. Richards
  • Patent number: 10115405
    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: October 30, 2018
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Lars Villemoes
  • Publication number: 20180308496
    Abstract: The present document relates to a method of layered encoding of a compressed sound representation of a sound or sound field. The compressed sound representation comprises a basic compressed sound representation comprising a plurality of components, basic side information for decoding the basic compressed sound representation to a basic reconstructed sound representation of the sound or sound field, and enhancement side information including parameters for improving the basic reconstructed sound representation.
    Type: Application
    Filed: October 7, 2016
    Publication date: October 25, 2018
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Sven KORDON, Alexander KRUEGER
  • Publication number: 20180310027
    Abstract: In a method to improve the dynamic range of high-dynamic range (HDR) signals using an enhancement layer, a piecewise-linear inter-layer predictor and a residual masking operator are applied. The generation of the piecewise-linear inter-layer prediction function is based on a computed scene-significance histogram based on the average of frame-significance histograms indicating pixel values where coding artifacts are most likely to occur. For each segment in the prediction function, its slope is inversely proportional to a measure of energy in the segment under the scene-significance histogram. Bit rate constrains for the enhancement layer are also taken into consideration in determining the piecewise-linear prediction function.
    Type: Application
    Filed: October 26, 2016
    Publication date: October 25, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Navaneeth KAMBALLUR KOTTAYIL, Guan-Ming SU
  • Publication number: 20180310112
    Abstract: The invention improves HOA sound field representation compression. The HOA representation is analysed for the presence of dominant sound sources and their directions are estimated. Then the HOA representation is decomposed into a number of dominant directional signals and a residual component. This residual component is transformed into the discrete spatial domain in order to obtain general plane wave functions at uniform sampling directions, which are predicted from the dominant directional signals. Finally, the prediction error is transformed back to the HOA domain and represents the residual ambient HOA component for which an order reduction is performed, followed by perceptual encoding of the dominant directional signals and the residual component.
    Type: Application
    Filed: June 26, 2018
    Publication date: October 25, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Alexander KRUEGER, Sven KORDON, Johannes BOEHM
  • Publication number: 20180308500
    Abstract: When compressing an HOA data frame representation, a gain control (15, 151) is applied for each channel signal before it is perceptually encoded (16). The gain values are transferred in a differential manner as side information. However, for starting decoding of such streamed compressed HOA data frame representation absolute gain values are required, which should be coded with a minimum number of bits. For determining such lowest integer number (?e) of bits the HOA data frame representation (c(k)) is rendered in spatial domain to virtual loudspeaker signals lying on a unit sphere, followed by normalisation of the HOA data frame representation (c(k)). Then the lowest integer number of bits is set to ?e=?log2(?log2(?{square root over (KMAX)}·O)?+1)?.
    Type: Application
    Filed: June 26, 2018
    Publication date: October 25, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Alexander KRUEGER, Sven KORDON
  • Publication number: 20180310023
    Abstract: Encoding and decoding architectures for 3D video delivery are described, such as 2D compatible 3D video delivery and frame compatible 3D video delivery. The architectures include pre-processing stages to pre-process the output of a base layer video encoder and/or decoder and input the pre-processed output into an enhancement layer video encoder and/or decoder of one or more enhancement layers. Multiplexing methods of how to combine the base and enhancement layer videos are also described.
    Type: Application
    Filed: June 18, 2018
    Publication date: October 25, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Alexandros TOURAPIS, Peshala V. PAHALAWATTA, Athanasios LEONTARIS, Kevin J. STEC, Walter J. HUSAK
  • Publication number: 20180308507
    Abstract: Example embodiments disclosed herein relate to audio signal processing with low latency. A method of processing an audio signal is disclosed. The method includes obtaining frequency parameters of a current frame of the audio signal. The method also includes generating intermediate frequency domain outputs for a set of predefined frequency bands based on the frequency parameters using predefined frequency band filter banks, a frequency band filter bank being specific to a respective frequency band in the set. The method further includes determining frequency band energies for the set of predefined frequency bands based on the intermediate frequency domain outputs, and processing the current frame based on the determined frequency band energies. Corresponding system, computer program product, and device for processing an audio signal are also disclosed.
    Type: Application
    Filed: January 13, 2017
    Publication date: October 25, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Zhiwei SHUANG, David S. MCGRATH, Michael William MASON
  • Publication number: 20180308498
    Abstract: Soundfield signals such as e.g. Ambisonics carry a representation of a desired sound field. The Ambisonics format is based on spherical harmonic decomposition of the soundfield, and Higher Order Ambisonics (HOA) uses spherical harmonics of at least 2nd order. However, commonly used loudspeaker setups are irregular and lead to problems in decoder design. A method for improved decoding an audio soundfield representation for audio playback comprises calculating a panning function (W) using a geometrical method based on the positions of a plurality of loudspeakers and a plurality of source directions, calculating a mode matrix (?) from the loudspeaker positions, calculating a pseudo-inverse mode matrix (?+) and decoding the audio soundfield representation. The decoding is based on a decode matrix (D) that is obtained from the panning function (W) and the pseudo-inverse mode matrix (?+).
    Type: Application
    Filed: June 26, 2018
    Publication date: October 25, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Johann-Markus BATKE, Florian KEILER, Johannes BOEHM
  • Patent number: 10111022
    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: Grant
    Filed: May 26, 2016
    Date of Patent: October 23, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alan J. Seefeldt, Lie Lu, Chen Zhang
  • Patent number: 10110908
    Abstract: Methods, systems, and computer programs for improving compressed image chroma information. In one aspect of the invention, a resolution for a red color component of a color video image is used that is higher than the resolution for a blue color component of the color video image. Another aspect includes utilizing a lower or higher value of a quantization parameter (QP) for one or more chroma channels as compared to the luminance channel. Another aspect is use of a logarithmic representation of a video image to benefit image coding. Another aspect uses more than two chroma channels to represent a video image.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: October 23, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Gary A. Demos
  • Patent number: 10109296
    Abstract: The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and/or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor S.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: October 23, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10110900
    Abstract: The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: October 23, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Walter C. Gish, Christopher J. Vogt
  • Publication number: 20180301157
    Abstract: Example embodiments disclosed herein relate to impulsive noise suppression. A method of impulsive noise suppression in an audio signal is disclosed. The method includes determining an impulsive noise related feature from a current frame of the audio signal. The method also includes detecting an impulsive noise in the current frame based on the impulsive noise related feature, and in response to detecting the impulsive noise in the current frame, applying a suppression gain to the current frame to suppress the impulsive noise. Corresponding system and computer program product of impulsive noise suppression in an audio signal are also disclosed.
    Type: Application
    Filed: April 27, 2016
    Publication date: October 18, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: David GUNAWAN, Dong SHI, Glenn N. DICKINS
  • Publication number: 20180302623
    Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.
    Type: Application
    Filed: June 18, 2018
    Publication date: October 18, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Wenhui JIA, Ajit NINAN, Arkady TEN, Gregory John WARD
  • Publication number: 20180301156
    Abstract: Exemplary embodiments provide encoding and decoding methods, and associated encoders and decoders, for encoding and decoding of an audio scene which at least comprises one or more audio objects (106a). The encoder (108, 110) generates a bit stream (116) which comprises downmix signals (112) and side information which includes individual matrix elements (114) of a reconstruction matrix which enables reconstruction of the one or more audio objects (106a) in the decoder (120).
    Type: Application
    Filed: June 21, 2018
    Publication date: October 18, 2018
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Heiko PURNHAGEN, Lars VILLEMOES, Leif Jonas SAMUELSSON, Toni HIRVONEN
  • Patent number: 10102864
    Abstract: For an efficient encoding of subband configuration data the first, penultimate and last subband groups are treated differently than the other subband groups. Further, subband group bandwidth difference values are used in the encoding. The number of subband groups NSB is coded using a fixed number of bits representing NSB?1. The bandwidth value BSB[1] of the first subband group is coded using a unary code representing BSB[1]?1. No bandwidth value BSB[g] is coded for the last subband g=NSB. For subband groups g=2, . . . , NSB?2 bandwidth difference values ?BSB[g]=BSB[g]?BSB[g?1] are coded using a unary code, and the bandwidth difference value ?BSB[NSB?1] for subband group g=NSB?1 is coded using a fixed number of bits.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: October 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Florian Keiler, Sven Kordon, Alexander Krueger
  • Patent number: 10104391
    Abstract: Methods and systems for improving coding efficiency of video. In one aspect of the disclosure, efficiency may be improved by trimming candidate motion vectors used for spatial and/or temporal prediction. In another aspect of the disclosure, efficiency may be improved by choosing selective combinations of syntax elements from video data.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: October 16, 2018
    Assignee: Dolby International AB
    Inventors: Yeping Su, Christopher A. Segall
  • Patent number: 10102866
    Abstract: The present document relates to audio source coding systems. In particular, the present document relates to audio source coding systems which make use of linear prediction in combination with a filterbank. A method for estimating a first sample (615) of a first subband signal in a first subband of an audio signal is described. The first subband signal of the audio signal is determined using an analysis filterbank (612) comprising a plurality of analysis filters which provide a plurality of subband signals in a plurality of subbands from the audio signal, respectively.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: October 16, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10104377
    Abstract: Described are techniques in video coding and/or decoding that allow for selectively breaking prediction and/or in loop filtering across segment boundaries between different segments of a video picture. A high layer syntax element, such as a parameter set or a slice header, may contain one or more indications signalling to an encoder and/or decoder whether an associated prediction or loop filtering tool may be applied across the segment boundary. In response to such one or more indications, the encoder and/or decoder may then control the prediction or loop filtering tool accordingly.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: October 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Michael Horowitz
  • Patent number: 10104338
    Abstract: Systems and methods are described for automatically framing participants in a video conference using a single camera of a video conferencing system. A camera of a video conferencing system may capture video images of a conference room. A processor of the video conferencing system may identify a potential region of interest within a video image of the captured video images, the potential region of interest including an identified participant. Feature detection may be executed on the potential region of interest, and a region of interest may be computed based on the executed feature detection. The processor may then automatically frame the identified participant within the computed region of interest, the automatic framing including at least one of cropping the video image to match the computed region of interest and rescaling the video image to a desired resolution.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: October 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Erwin Goesnar
  • Patent number: 10104376
    Abstract: Methods and systems for improving coding decoding efficiency of video by providing a syntax modeler, a buffer, and a decoder. The syntax modeler may associate a first sequence of symbols with syntax elements. The buffer may store tables, each represented by a symbol in the first sequence, and each used to associate a respective symbol in a second sequence of symbols with encoded data. The decoder decodes the data into a bitstream using the second sequence retrieved from a table.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: October 16, 2018
    Assignee: Dolby International AB
    Inventors: Yeping Su, Christopher A. Segall
  • Patent number: 10103999
    Abstract: Some implementations involve controlling a jitter buffer size during a teleconference according to a jitter buffer size estimation algorithm based, at least in part, on a cumulative distribution function (CDF). The CDF may be based, at least in part, on a network jitter parameter. The CDF may be initialized according to a parametric model. At least one parameter of the parametric model may be based, at least in part, on legacy network jitter information.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: October 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: JiaQuan Huo, Xuejing Sun, Kai Li
  • Patent number: 10104488
    Abstract: M audio input channels, each associated with a spatial direction, are translated to N audio output channels, each associated with a spatial direction, wherein M and N are positive whole integers, M is three or more, and N is three or more, by deriving the N audio output channels from the M audio input channels, wherein one or more of the M audio input channels is associated with a spatial direction other than a spatial direction with which any of the N audio output channels is associated, and at least one of the one or more of the M audio input channels is mapped to a respective set of at least three of the N output channels. At least three output channels of a set may be associated with contiguous spatial directions.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: October 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Mark F. Davis
  • Patent number: 10103700
    Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: October 16, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. Crockett, Alan J. Seefeldt
  • Publication number: 20180295459
    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: Application
    Filed: June 14, 2018
    Publication date: October 11, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Richard J. CARTWRIGHT, David S. MCGRATH, Glenn N. DICKINS
  • Publication number: 20180295352
    Abstract: A spatial direction of a wearable device that represents an actual viewing direction of the wearable device is determined. The spatial direction of the wearable device is used to select, from a multi-view image comprising single-view images, a set of single-view images. A display image is caused to be rendered on a device display of the wearable device. The display image represents a single-view image as viewed from the actual viewing direction of the wearable device. The display image is constructed based on the spatial direction of the wearable device and the set of single-view images.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 11, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Ajit NINAN, Neil Mammen
  • Publication number: 20180295241
    Abstract: Embodiments are described for a soundfield system that receives a transmitting soundfield, wherein the transmitting soundfield includes a sound source at a location in the transmitting soundfield. The system determines a rotation angle for rotating the transmitting soundfield based on a desired location for the sound source. The transmitting soundfield is rotated by the determined angle and the system obtains a listener's soundfield based on the rotated transmitting soundfield. The listener's soundfield is transmitted for rendering to a listener.
    Type: Application
    Filed: April 18, 2018
    Publication date: October 11, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: Richard J. CARTWRIGHT
  • Publication number: 20180293752
    Abstract: At a first time point, a first light capturing device at a first spatial location in a three-dimensional (3D) space captures first light rays from light sources located at designated spatial locations on a viewer device in the 3D space. At the first time point, a second light capturing device at a second spatial location in the 3D space captures second light rays from the light sources located at the designated spatial locations on the viewer device in the 3D space. Based on the first light rays captured by the first light capturing device and the second light rays captured by the second light capturing device, at least one of a spatial position and a spatial direction, at the first time point, of the viewer device is determined.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 11, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Ajit NINAN, Neil MAMMEN
  • Publication number: 20180295240
    Abstract: Teleconference audio data including a plurality of individual uplink data packet streams, may be received during a teleconference. Each uplink data packet stream may corresponding to a telephone endpoint used by one or more teleconference participants. The teleconference audio data may be analyzed to determine a plurality of suppressive gain coefficients, which may be applied to first instances of the teleconference audio data during the teleconference, to produce first gain-suppressed audio data provided to the telephone endpoints during the teleconference. Second instances of the teleconference audio data, as well as gain coefficient data corresponding to the plurality of suppressive gain coefficients, may be sent to a memory system as individual uplink data packet streams. The second instances of the teleconference audio data may be less gain-suppressed than the first gain-suppressed audio data.
    Type: Application
    Filed: June 15, 2016
    Publication date: October 11, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. DICKINS, Richard J. CARTWRIGHT
  • Publication number: 20180295330
    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. over time—for continuous image improvement are also disclosed.
    Type: Application
    Filed: May 31, 2018
    Publication date: October 11, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Jerome SHIELDS, Martin J. RICHARDS, Juan P. PERTIERRA
  • Publication number: 20180295464
    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: Application
    Filed: June 14, 2018
    Publication date: October 11, 2018
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Dirk Jeroen BREEBAART, Lie LU, Nicolas R. TSINGOS, Antonio MATEOS SOLE
  • Publication number: 20180295329
    Abstract: Projection systems and/or methods comprising a blurring element are disclosed In one embodiment, a blurring element may comprise a first plate having a pattern on a first surface and second plate. The first plate and the second plate may comprise material having a slight difference in their respective index of refraction. In another embodiment, a blurring element may comprise a first plate having a pattern thereon and a second immersing material. The blurring element may be placed in between two modulators in a dual or multi-modulator projector system. The blurring element may be configured to give a desired shape to the light transmitted from a first modulator to a second modulator.
    Type: Application
    Filed: May 10, 2016
    Publication date: October 11, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Martin J. RICHARDS, Nathan Shawn WAINWRIGHT, Duane Scott DEWALD, Barret LIPPEY, Brad WALKER
  • Publication number: 20180295351
    Abstract: A wearable device comprises a left view optical stack for a viewer to view left view cinema display images rendered on a cinema display and a right view optical stack for the viewer to view right view cinema display images rendered on the cinema display. The left view cinema display images and the right view cinema display images form stereoscopic cinema images. The wearable device further comprises a left view imager that renders left view device display images, to the viewer, on a device display, and a right view imager that renders right view device display images, to the viewer, on the device display. The left view device display images and the right view device display images form stereoscopic device images complementary to the stereoscopic cinema images.
    Type: Application
    Filed: April 4, 2018
    Publication date: October 11, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Ajit NINAN, Neil MAMMEN
  • Publication number: 20180292663
    Abstract: A projector system comprising a laser light source, a collimating lens, a fly-eye lens, an integrating rod and a first modulator is disclosed. The light from a laser light source/fiber illuminates a collimator to substantially collimate the light and then is transmitted through a fly's-eye lens. The fly's-eye lens provides a desired angular/spatial light distribution for further processing to a first modulator of the projector system.
    Type: Application
    Filed: October 11, 2016
    Publication date: October 11, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Martin J. RICHARDS, Duane Scott DEWALD, Nathan WAINWRIGHT, Barret LIPPEY
  • Patent number: 10095468
    Abstract: In an audio encoder, for audio content received in a source audio format, default gains are generated based on a default dynamic range compression (DRC) curve, and non-default gains are generated for a non-default gain profile. Based on the default gains and non-default gains, differential gains are generated. An audio signal comprising the audio content, the default DRC curve, and differential gains is generated. In an audio decoder, the default DRC curve and the differential gains are identified from the audio signal. Default gains are re-generated based on the default DRC curve. Based on the combination of the re-generated default gains and the differential gains, operations are performed on the audio content extracted from the audio signal.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: October 9, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Jeroen Koppens, Jeffrey Riedmiller, Kristofer Kjoerling, Alexander Groeschel, Holger Hoerich, Alan J. Seefeldt
  • Patent number: 10097940
    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: December 20, 2017
    Date of Patent: October 9, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10097857
    Abstract: A method for encoding a LUT defined as a lattice of vertices is disclosed. At least one value is of each vertex of the lattice. The method comprises for a current vertex: predicting the at least one value of said current vertex from another value which is for example obtained from reconstructed values of neighboring vertices; and encoding in a bitstream at least one residue computed between the at least one value of the current vertex and its prediction in a bitstream.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: October 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Philippe Bordes, Pierre Andrivon, Emmanuel Jolly
  • Patent number: 10097941
    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: December 20, 2017
    Date of Patent: October 9, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10097846
    Abstract: A system for decoding a video bitstream includes receiving a bitstream and a plurality of enhancement bitstreams together with receiving a video parameter set and a video parameter set extension. The system also receives an output layer set change message including information indicating a change in at least one output layer set.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: October 9, 2018
    Assignee: Dolby International AB
    Inventor: Sachin G. Deshpande
  • Patent number: 10097820
    Abstract: A high resolution 3D image may be encoded into a first multiplexed image frame and a second multiplexed image frame in a base layer (BL) video signal and an enhancement layer (EL) video signal. The first multiplexed image frame may comprise horizontal high resolution image data for both eyes, while the second multiplexed image frame may comprise vertical high resolution image data for both eyes. Encoded symmetric-resolution image data for the 3D image may be distributed to a wide variety of devices for 3D image processing and rendering. A recipient device may reconstruct reduced resolution 3D image from one of the first multiplexed image frame or the second multiplexed image frame. A recipient device may also reconstruct high resolution 3D image by combining high resolution image data from both of the first multiplexed image frame and the second multiplexed image frame.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: October 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Tao Chen, Hariharan Ganapathy, I, Samir N. Hulyalkar, Gopi Lakshminarayanan, Peng Yin, Taoran Lu, Walter J. Husak
  • Patent number: 10096329
    Abstract: Embodiments of the present invention relate to signal processing. Methods for enhancing intelligibility of speech content in an audio signal are disclosed. One of the methods comprises obtaining reference loudness of the audio signal. The method further comprises enhancing the intelligibility of the speech content by adjusting partial loudness of the audio signal based on the reference loudness and a degree of the intelligibility. Corresponding systems and computer program products are also disclosed.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: October 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guilin Ma, Xiguang Zheng, C. Phillip Brown
  • Publication number: 20180284590
    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: Application
    Filed: June 5, 2018
    Publication date: October 4, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Douglas J. GORNY, Martin J. RICHARDS, Timo KUNKEL, David Lloyd SCHNUELLE
  • Publication number: 20180287910
    Abstract: In a packet switched voice delivery application which utilizes a jitter buffer for the delivery of sequential packet data, a method of determining a measure of the output jitter of taking packets out of the buffer, the method including the step of: (a) forming a pull jitter measure comprising the differential fetch times between sequential pull packets dived by an expected time interval between packets.
    Type: Application
    Filed: September 27, 2016
    Publication date: October 4, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Xuejing Sun, JiaQuan Huo, Paul Holmberg
  • Publication number: 20180287918
    Abstract: This disclosure falls into the field of voice communication systems, more specifically it is related to the field of voice quality estimation in a packet based voice communication system. In particular the disclosure provides methods, computer program products and devices for reducing a prediction error of the voice quality estimation by considering forward error correction of lost voice packets.
    Type: Application
    Filed: May 5, 2016
    Publication date: October 4, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: Doh-Suk KIM
  • Patent number: 10089992
    Abstract: A method for compressing a HOA signal being an input HOA representation with input time frames (C(k)) of HOA coefficient sequences comprises spatial HOA encoding of the input time frames and subsequent perceptual encoding and source encoding. Each input time frame is decomposed (802) into a frame of predominant sound signals (XPS(k?1)) and a frame of an ambient HOA component ({tilde over (C)}AMB(k?1)). The ambient HOA component ({tilde over (C)}AMB(k?1)) comprises, in a layered mode, first HOA coefficient sequences of the input HOA representation (cn(k?1)) in lower positions and second HOA coefficient sequences (cAMB,n(k?1)) in remaining higher positions. The second HOA coefficient sequences are part of an HOA representation of a residual between the input HOA representation and the HOA representation of the predominant sound signals.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: October 2, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger, Oliver Wuebbolt
  • Patent number: 10090817
    Abstract: Systems and methods for leveling loudness variation in an audio signal are described. Embodiments use both a perceptual leveling algorithm and a standards-based loudness measure together to minimize audio process artifacts and ensure that the measured loudness of the processed audio is close to a required measure, according to a particular standard measurement of loudness. These systems and methods can be used either offline or in real-time.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: October 2, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Andrew P. Reilly, Michael Smithers, Jeffrey Riedmiller
  • Patent number: 10088896
    Abstract: Input VR imagery is received. Global motions as represented in the input VR imagery relative to a viewer of a virtual reality (VR) application is extracted. A dampening factor is applied to the global motions to generate dampened global motions. VR imagery to be rendered to the viewer at a time point is generated based on the input VR imagery and the dampened global motions.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: October 2, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Scott Daly, Grant Haverstock Mulliken
  • Patent number: D830329
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: October 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: George Trasmonte, Meiling Zhang, Kelvin Francis Griffiths