Dolby Labs Patents

Dolby Laboratories, Inc. licenses its audio technologies, including its noise-reduction systems, to the media industry. Its product portfolio includes Dolby Digital Plus (DD+), Dolby Digital (DD), AAC and HE-AAC, Dolby TrueHD, Dolby Atmos, Dolby AC-4, Dolby Voice and Dolby Vision. Products that incorporate Dolby technologies include televisions, set-top boxes, computers, DVD and Blu-ray devices, soundbars, smartphones, tablets, video game consoles, and automobile entertainment systems.

Dolby Labs Patents by Type

  • Publication number: 20170054938
    Abstract: Methods and systems for controlling judder are disclosed. Judder can be introduced locally within a picture, to restore a judder feeling which is normally expected in films. Capture time and display time of frames can be manipulated to obtain a desired amount of judder. Frames can be interpolated to obtain a film with a higher frame rate and localized control of judder.
    Type: Application
    Filed: February 23, 2015
    Publication date: February 23, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Ning XU, Kimball Darr THURSTON, III, Scott DALY, James E. CRENSHAW, Alfred SHE
  • Patent number: 9578341
    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 3, 2011
    Date of Patent: February 21, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Gary A. Demos
  • Patent number: 9576555
    Abstract: Displays, display components, image and video processing apparatus and related methods are described. A method for driving local-dimming displays comprises generating control values for driving pixels of a spatial light modulator from one image data component and generating control values for driving backlight elements from a second image data component. The first and second image data components may respectively comprise a tone map and a ratio image. Control values for the spatial light modulator and/or backlight may be obtained using cost effective hardware.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: February 21, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Ajit Ninan, Wenhui Jia
  • Patent number: 9578334
    Abstract: In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4.×.4 or an 8.×.8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks, inter-predicted macroblocks, and/or direct mode inter-predicted macroblocks. The encoding operation may generate a transform size syntax element to indicate the transform size that may be used in reconstructing the encoded macroblock. The transform size syntax element may be transmitted to a decoder as part of the encoded video information bit stream.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: February 21, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Stephen Gordon, Douglas Chin
  • Publication number: 20170048639
    Abstract: A method of decomposing a matrix of dimension L-by-N, where L is less than or equal to N, into a sequence of N-by-N unit primitive matrices and a permutation matrix comprising a sequence that is the product of the primitive matrices and the permutation matrix, containing L rows that are substantially close to the provided L-by-N matrix, where the choice of the permutation matrix and the indices of the non-trivial rows in the primitive matrices are chosen to limit the coefficient values in the primitive matrices.
    Type: Application
    Filed: April 23, 2015
    Publication date: February 16, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Vinay MELKOTE, Malcolm James LAW
  • Publication number: 20170047071
    Abstract: A method of encoding adaptive audio, comprising receiving N objects and associated spatial metadata that describes the continuing motion of these objects, and partitioning the audio into segments based on the spatial metadata. The method encodes adaptive audio having objects and channel beds by capturing a continuing motion of a number N objects in a time-varying matrix trajectory comprising a sequence of matrices, coding coefficients of the time-varying matrix trajectory in spatial metadata to be transmitted via a high-definition audio format for rendering the adaptive audio through a number M output channels, and segmenting the sequence of matrices into a plurality of sub-segments based on the spatial metadata, wherein the plurality of sub segments are configured to facilitate coding of one or more characteristics of the adaptive audio.
    Type: Application
    Filed: April 23, 2015
    Publication date: February 16, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Vinay MELKOTE, Malcolm James LAW, Roy M. FEJGIN
  • Patent number: 9571855
    Abstract: Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: February 14, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Gary A. Demos
  • Patent number: 9571425
    Abstract: Voice communication method and apparatus and method and apparatus for operating jitter buffer are described. Audio blocks are acquired in sequence. Each of the audio blocks includes one or more audio frames. Voice activity detection is performed on the audio blocks. In response to deciding voice onset for a present one of the audio blocks, a subsequence of the sequence of the acquired audio blocks is retrieved. The subsequence precedes the present audio block immediately. The subsequence has a predetermined length and non-voice is decided for each audio block in the subsequence. The present audio block and the audio blocks in the subsequence are transmitted to a receiving party. The audio blocks in the subsequence are identified as reprocessed audio blocks. In response to deciding non-voice for the present audio block, the present audio block is cached.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: February 14, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. Dickins, Xuejing Sun, Brendon Costa
  • Patent number: 9570083
    Abstract: The present disclosure provides methods, devices and computer program products for encoding and decoding a stereo audio signal based on an input signal. According to the disclosure, a hybrid approach of using both parametric stereo coding and a discrete representation of the stereo audio signal is used which may improve the quality of the encoded and decoded audio for certain bitrates.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: February 14, 2017
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Kristofer Kjoerling
  • Publication number: 20170039963
    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: October 19, 2016
    Publication date: February 9, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Lorne A. Whitehead, Gregory John Ward, Louis D. Silverstein, Helge Seetzen
  • Publication number: 20170039690
    Abstract: Image data is adjusted for display on a target display. Maximum safe expansions for one or more attributes of the image data are compared to maximum available expansions for the attributes. An amount of expansion is selected that does not exceed either of the maximum safe expansion and the maximum available expansion. Artifacts caused by over expansion may be reduced or avoided.
    Type: Application
    Filed: October 24, 2016
    Publication date: February 9, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Robin ATKINS, Steve MARGERM
  • Publication number: 20170041724
    Abstract: Embodiments are described for calibrating a speaker in a device having a microphone by inputting an original audio signal to a processing component and an output stage of the device for playback through the speakers, receiving playback sound output from the speakers through the microphone to generate a microphone signal, and inputting the microphone signal into the processing component to calibrate the speakers for optimal playback of the original audio signal, wherein the processing component is configured to compare the original audio signal to the microphone signal and correct the microphone signal by one or more audio processing functions in accordance with a refresh schedule.
    Type: Application
    Filed: August 3, 2016
    Publication date: February 9, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Aaron Steven MASTER, Alan J. SEEFELDT, Yu Cecilia HOU
  • Patent number: 9564078
    Abstract: Techniques for rendering images directly with light conversion materials are described. In some embodiments, image data for one or more image frames is received. A light source may be controlled to emit first light to irradiate a light conversion material disposed with an image rendering surface. Second light that renders the one or more image frames may be emitted from the light conversion material. The second light emitted from the light conversion material may be excited by the first light. A display system under techniques herein may be free of a light valve layer on which light transmittance is modulated on a pixel-by-pixel basis.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: February 7, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Ajit Ninan
  • Patent number: 9565314
    Abstract: The present document relates to audio conference systems. In particular, the present document relates to the mapping of soundfields within an audio conference system. A conference multiplexer (110, 175, 210, 400) configured to place a first input soundfield signal (402) originating from a first soundfield endpoint (120, 170) within a 2D or 3D conference scene (300) to be rendered to a listener (301) is described. The first input soundfield signal (402) is indicative of a soundfield captured by the first soundfield endpoint (120, 170).
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: February 7, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Richard J. Cartwright, David S. McGrath, Glenn N. Dickins
  • Patent number: 9564139
    Abstract: A spread spectrum data hiding for audio signals is described. A set of pseudo-random noise sequences is added to an audio signal according to a data to be embedded. A masking curve is used to shape the added noise. A transient detection step can be used to control whether a shaped noise sequence is to be added or not. Embedded information is detected by first performing a whitening step and then performing a phase-only correlation with a same set of pseudo-random noise sequences. A detection method that is based on correlation of multiplexed noise sequences with a noise sequence embedded in the audio is also described.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: February 7, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Regunathan Radhakrishnan, Michael Smithers, David S. McGrath
  • Patent number: 9565509
    Abstract: An audio object coder for generating an encoded object signal using a plurality of audio objects includes a downmix information generator for generating downmix information indicating a distribution of the plurality of audio objects into at least two downmix channels, an audio object parameter generator for generating object parameters for the audio objects, and an output interface for generating the imported audio output signal using the downmix information and the object parameters. An audio synthesizer uses the downmix information for generating output data usable for creating a plurality of output channels of the predefined audio output configuration.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: February 7, 2017
    Assignee: DOLBY INTERNATIONAL AB
    Inventors: Jonas Engdegard, Lars Villemoes, Heiko Purnhagen, Barbara Resch
  • Publication number: 20170034026
    Abstract: Some implementations involve analyzing audio packets received during a time interval that corresponds with a conversation analysis segment to determine network jitter dynamics data and conversational interactivity data. The network jitter dynamics data may provide an indication of jitter in a network that relays the audio data packets. The conversational interactivity data may provide an indication of interactivity between participants of a conversation represented by the audio data. A jitter buffer size may be controlled according to the network jitter dynamics data and the conversational interactivity data. The time interval may include a plurality of talkspurts.
    Type: Application
    Filed: April 9, 2015
    Publication date: February 2, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Kai LI, Xuejing SUN, Gary SPITTLE
  • Publication number: 20170034521
    Abstract: A sequence of visual dynamic range (VDR) images is encoded using a standard dynamic range (SDR) base layer and one or more enhancement layers. A predicted VDR image is generated from an SDR input by using a weighted, multi-band, cross-color channel prediction model. Exponential weights with an adaptable decay parameter for each band are also presented.
    Type: Application
    Filed: October 13, 2016
    Publication date: February 2, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming SU, Sheng QU, Peng YIN
  • Publication number: 20170034486
    Abstract: An Acoustic-Optic A/O device receives light from a source and deflecting the light onto the second A/O device which may be a multi-stacked set of individual A/O devices. The first and second devices may deflected light according to control signals. Also, a multi-modulator projector display system including a light source, controller, an A/O modulator illuminated by the light source and capable of deflecting light according to controller signals, a second modulator illuminated by light from said A/O modulator and capable of modulating the A/O modulated light, said second modulator comprising a plurality of mirrors, and said second modulator capable of modulating the light according to controller signals.
    Type: Application
    Filed: December 5, 2014
    Publication date: February 2, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: Martin J. RICHARDS
  • Patent number: 9558744
    Abstract: An audio processing apparatus and an audio processing method are described. In one embodiment, the audio processing apparatus include an audio masker separator for separating from a first audio signal an audio material comprising a sound other than stationary noise and utterance meaningful in semantics, as an audio masker candidate. The apparatus also includes a first context analyzer for obtaining statistics regarding contextual information of detected audio masker candidates, and a masker library builder for building a masker library or updating an existing masker library by adding, based on the statistics, at least one audio masker candidate as an audio masker into the masker library, wherein audio maskers in the maker library are used to be inserted into a target position in a second audio signal to conceal defects in the second audio signal.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: January 31, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Xuejing Sun, Shen Huang, Poppy Crum, Hannes Muesch, Glenn N. Dickins, Michael Eckert
  • Patent number: 9558753
    Abstract: In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 31, 2017
    Assignee: Dolby International AB
    Inventors: Barbara Resch, Kristofer Kjörling, Lars Villemoes
  • Patent number: 9558754
    Abstract: In one embodiment, an audio decoder for decoding an encoded audio bitstream is disclosed. The audio decoder is capable of being operated in at least three different decoding modes. The audio decoder includes a demultiplexer for obtaining audio data and control information from the encoded audio bitstream. The audio decoder also includes a first audio decoder configured to operate in a first decoding mode using a first decoding technique and a second audio decoder configured to operate in a second decoding mode using a second decoding technique. The audio decoder also includes a pitch predictor integrated into the second audio decoder. The pitch predictor includes a long-term prediction filter and a short-term prediction filter. The audio decoder further includes a selector for selecting one of the at least three different decoding modes based on at least some of the control information.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: January 31, 2017
    Assignee: Dolby International AB
    Inventors: Barbara Resch, Kristofer Kjörling, Lars Villemoes
  • Patent number: 9560380
    Abstract: A method of coding at least one image comprising the steps of splitting the image into a plurality of blocks, of grouping said blocks into a predetermined number of subsets of blocks, of coding each of said subsets of blocks in parallel, the blocks of a subset considered being coded according to a predetermined sequential order of traversal. The coding step comprises, for a current block of a subset considered, the sub-step of predictive coding of said current block with respect to at least one previously coded and decoded block, and the sub-step of entropy coding of said current block on the basis of at least one probability of appearance of a symbol.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: January 31, 2017
    Assignee: DOLBY INTERNATIONAL AB
    Inventors: Felix Henry, Stephane Pateux
  • Patent number: 9560461
    Abstract: In some embodiments, a method for automatic detection of polarity of speakers, e.g., speakers installed in cinema environments. In some embodiments, the method determines relative polarities of a set of speakers (e.g., loudspeakers and/or drivers of a multi-driver loudspeaker) using a set of microphones, including by measuring impulse responses, including an impulse response for each speaker-microphone pair; clustering the speakers into a set of groups, each group including at least two of the speakers which are similar to each other in at least one respect; and for each group, determining and analyzing cross-correlations of pairs of impulse responses (e.g., pairs of processed versions of impulse responses) of speakers in the group to determine relative polarities of the speakers. Other aspects include systems configured (e.g., programmed) to perform any embodiment of the inventive method, and computer readable media (e.g., discs) which store code for implementing any embodiment of the inventive method.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: January 31, 2017
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Mark F. Davis, Louis Fielder, Antonio Mateos Sole, Giulio Cengarle, Sunil Bharitkar
  • Publication number: 20170026017
    Abstract: Volume leveler controller and controlling method are disclosed. In one embodiment, A volume leveler controller includes an audio content classifier for identifying the content type of an audio signal in real time; and an adjusting unit for adjusting a volume leveler in a continuous manner based on the content type as identified. The adjusting unit may configured to positively correlate the dynamic gain of the volume leveler with informative content types of the audio signal, and negatively correlate the dynamic gain of the volume leveler with interfering content types of the audio signal.
    Type: Application
    Filed: October 4, 2016
    Publication date: January 26, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Jun WANG, Lie LU, Alan SEEFELDT
  • Publication number: 20170026771
    Abstract: Embodiments of the present invention relate to audio signal processing. Specifically, a method for processing audio signal is provided, the method comprising: determining, for a current frame of the audio signal, frequency band energies for a plurality of predefined frequency bands at least partially based on frequency parameters of the current frame; generating frequency band gains for the plurality of predefined frequency bands by processing the frequency band energies; and generating frequency bin gains for the current frame based on the frequency band gains using predefined frequency band filter banks, the frequency band filter banks being specific to the plurality of predefined frequency bands. Corresponding system and computer program product are also disclosed.
    Type: Application
    Filed: November 24, 2014
    Publication date: January 26, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Zhiwei SHUANG, David S. MCGRATH, Michael W. MASON
  • Publication number: 20170025127
    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: August 23, 2016
    Publication date: January 26, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Johann-Markus BATKE, Florian KEILER, Johannes BOEHM
  • Publication number: 20170026750
    Abstract: Embodiments are directed to speakers and circuits that reflect sound off a wall surface (114) to a listening location at a distance from a speaker. The reflected sound (103) provides direct audio cues to reproduce audio objects that have direct audio components without the need for direct firing speakers. The speaker comprises sideward firing drivers (108) to reflect sound off of the wall surface (114) and represents a virtual direct speaker (116). A virtual direct filter is applied to the sideward-firing driver signal to improve the perception of direct audio transmitted by the sideward firing speaker (108) to provide optimum reproduction of the reflected sound. The virtual direct filter may be incorporated as part of a crossover circuit that separates the full band and sends high frequency sound to the sideward-firing driver (108).
    Type: Application
    Filed: January 6, 2015
    Publication date: January 26, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Warren MANSFIELD, Eugene Edward RADZIK, Alan J. SEEFELDT, Jared SMITH, C. Phillip BROWN, Michael SMITHERS
  • Publication number: 20170026766
    Abstract: In some embodiments, a method for monitoring speakers within an audio playback system (e.g., movie theater) environment. In typical embodiments, the monitoring method assumes that initial characteristics of the speakers (e.g., a room response for each of the speakers) have been determined at an initial time, and relies on one or more microphones positioned in the environment to perform a status check on each of the speakers to identify whether a change to at least one characteristic of any of the speakers has occurred since the initial time. In other embodiments, the method processes data indicative of output of a microphone to monitor audience reaction to an audiovisual program. Other aspects include a system configured (e.g., programmed) to perform any embodiment of the inventive method, and a computer readable medium (e.g., a disc) which stores code for implementing any embodiment of the inventive method.
    Type: Application
    Filed: September 30, 2016
    Publication date: January 26, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Sunil BHARITKAR, Brett CROCKETT, Louis FIELDER, Michael ROCKWELL
  • Publication number: 20170026298
    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: Application
    Filed: April 8, 2015
    Publication date: January 26, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: JiaQuan HUO, Xuejing SUN, Kai LI
  • Publication number: 20170025074
    Abstract: Systems and methods are disclosed for dynamically adjusting the backlight of a display during video playback or for generating filtered video metadata. Given an input video stream and associated metadata values of minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the frame min, mid, or max luminance values are filtered using a temporal filter to generate a filtered output value for each frame. At least one filtering coefficient of the temporal filter is adapted based on a logistic function controlled by slope and sensitivity values. The instantaneous dynamic range of a target display is determined based on the filtered metadata values and the minimum and maximum brightness values of the display.
    Type: Application
    Filed: October 5, 2016
    Publication date: January 26, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Suzanne FARRELL, Scott DALY, Robin ATKINS, Timo KUNKEL, Kimball Darr THURSTON, III
  • Publication number: 20170025076
    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: October 3, 2016
    Publication date: January 26, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Lorne A. WHITEHEAD, Helge SEETZEN, Gregory John WARD, Wolfgang HEIDRICH
  • Publication number: 20170024906
    Abstract: Several embodiments of display systems that have wide color gamut performance are disclosed herein. In one embodiment, a display system comprises a plurality of emitters, said emitters emanating light into an optical path; a first modulator, said first modulator comprising a plurality of colored subpixels and wherein said first modulator transmitting light emanating from said emitters in said optical path; and a color notch filter, said color notch filter placed in said optical path for conditioning or convolving light together with said first modulator.
    Type: Application
    Filed: June 17, 2016
    Publication date: January 26, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: John GILBERT
  • Patent number: 9554020
    Abstract: Video data with enhanced dynamic range (EDR) are color graded for a first and a second reference display with different dynamic range characteristics to generate a first color-graded output, a second color graded output, and associated first and second sets of metadata. The first color-graded output and the two sets of metadata are transmitted from an encoder to a decoder to be displayed on a target display which may be different than the second reference display. At the receiver, a decoder interpolates between the first and second set of metadata to generate a third set of metadata which drives the display management process for displaying the received video data onto the target display. The second set of metadata of metadata may be represented as delta metadata values from the first set of metadata values.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: January 24, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Kimball D. Thurston, III, James E. Crenshaw, Robin Atkins, Tao Chen, Timo Kunkel
  • Patent number: 9551161
    Abstract: The present disclosure is directed to an entrance to a theater of the type normally used to show motion pictures. The motion picture theater entrance has distinctive outer walls separating a vestibule from a lobby. The vestibule has a curved image projection wall located inside said vestibule and is connected to a viewing area by a curved walkway. The entrance also may include border lighting along the upper and or lower edges of its walls.
    Type: Grant
    Filed: November 30, 2014
    Date of Patent: January 24, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Wilhelm Oehl, David Herman, Vincent Voron, Donald Burlock, Pascal Sijen, Christopher Roy Kukshtel
  • Patent number: 9552818
    Abstract: A decoding system reconstructs an n-channel audio signal on the basis of an input signal representing the audio signal, in different time frames, either by parametric coding or as n discretely coded channels. Parametric decoding uses a core signal and mixing parameters controlling a spatial synthesis stage, to which a downmix signal is supplied from a downmix stage. The downmix stage realizes a projection on the downmix signal based on an n-channel input signal, either a discretely coded signal or a core signal padded with neutral-valued channels. The padding may take place either on the decoding side (reduced parametric coding) or the encoding side. In an embodiment, an audio decoder (110) in the decoding system pads the core signal during an initial portion of each reduced parametrically coded time frame directly succeeding a discretely coded time frame and during a final portion of each reduced parametrically coded time frame directly preceding a discretely coded time frame.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: January 24, 2017
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Leif Sehlstrom, Karl Jonas Roeden, Kristofer Kjoerling, Lars Villemoes
  • Patent number: 9552824
    Abstract: Disclosed is a method, apparatus and non-transitory computer readable storage medium, which is configured to examine an input audio signal to determine an estimated pitch period associated with a detection criterion, encode the filtered audio signal to generate a compressed audio bit stream, decode the compressed audio bit stream to generate a decoded audio signal and adaptively filtering the decoded audio signal to produce an output audio signal, wherein adaptively filtering the decoded audio signal comprises filtering each of a plurality of segments of the decoded audio signal in a manner that is dependent upon the estimated pitch period associated therewith, and wherein a pitch-based post-filter operates to shape noise components located between harmonics of the input audio signal.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: January 24, 2017
    Assignee: Dolby International AB
    Inventors: Barbara Resch, Kristofer Kjörling, Lars Villemoes
  • Patent number: 9552827
    Abstract: A method (800) for determining an estimate (215, 261) of an echo path property of an electronic device (200, 250, 300, 600). The electronic device is configured to render a total audio signal using a loudspeaker (102), and the electronic device is configured to record an echo of the rendered audio signal using a microphone (103), thereby yielding a recorded audio signal (112). The method comprises inserting (801), in an inaudible manner, an auxiliary audio signal (212) into the total audio signal to be rendered; wherein the auxiliary audio signal (212) comprises a tonal audio signal at a first frequency; isolating (803) the echo of the auxiliary audio signal (212) from the recorded audio signal (112); and determining (804) the estimate (215, 261) of the echo path property based on the inserted auxiliary audio signal (212) and based on the isolated echo of the auxiliary audio signal (212).
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: January 24, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Craig Johnston, Dong Shi, Xuejing Sun, Glenn N. Dickins
  • Patent number: 9554132
    Abstract: Compression transforming video into a compressed representation (which typically can be delivered at a capped pixel rate compatible with conventional video systems), including by generating spatially blended pixels and temporally blended pixels (e.g., temporally and spatially blended pixels) of the video, and determining a subset of the blended pixels for inclusion in the compressed representation including by assessing quality of reconstructed video determined from candidate sets of the blended pixels. Trade-offs may be made between temporal resolution and spatial resolution of regions of reconstructed video determined by the compressed representation to optimize perceived video quality while reducing the data rate. The compressed data may be packed into frames. A reconstruction method generates video from a compressed representation using metadata indicative of at least one reconstruction parameter for spatial regions of the reconstructed video.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: January 24, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: James E. Crenshaw, Alfred She, Ning Xu, Limin Liu, Scott Daly, Kevin Stec, Samir Hulyalkar
  • Patent number: 9552845
    Abstract: Metadata comprising a set of gain values for creating a dominance effect is automatically generated. Automatically generating the metadata includes receiving multiple audio streams and a dominance criterion for at least one of the audio streams. A set of gains is computed for one or more audio streams based on the dominance criterion for the at least one audio stream and metadata is generated with the set of gains.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: January 24, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jeffrey C. Riedmiller, Regunathan Radhakrishnan, Hannes Muesch
  • Patent number: 9554156
    Abstract: Deriving illumination compensation parameters and detection of illumination dominant transitions types for video coding and processing applications is described. Illumination changes such as fade-ins, fade-outs, cross-fades, and flashes are detected. Detection of these illumination changes is then used for weighted prediction to provide for improved illumination compensation.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: January 24, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Athanasios Leontaris, Alexandros Tourapis
  • Publication number: 20170018279
    Abstract: There is provided methods and apparatuses for decoding and encoding of audio signals. In particular, a method for decoding includes receiving a waveform-coded signal having a spectral content corresponding to a subset of the frequency range above a cross-over frequency. The waveform-coded signal is interleaved with a parametric high frequency reconstruction of the audio signal above the cross-over frequency. In this way an improved reconstruction of the high frequency bands of the audio signal is achieved.
    Type: Application
    Filed: September 28, 2016
    Publication date: January 19, 2017
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Kristofer KJOERLING, Robin THESING, Harald MUNDT, Heiko PURNHAGEN, Karl Jonas ROEDEN
  • Publication number: 20170019670
    Abstract: Techniques use multiple lower bit depth (e.g., 8 bits) codecs to provide higher bit depth (e.g., 12+ bits) high dynamic range images from an upstream device to a downstream device. Multiple layers comprising a base layer and one or more enhancement layers may be used to carry video signals comprising image data compressed by lower bit depth encoders to a downstream device, wherein the base layer cannot be decoded and viewed on its own. Lower bit depth input image data to base layer processing may be generated from higher bit depth high dynamic range input image data via advanced quantization to minimize the volume of image data to be carried by enhancement layer video signals. The image data in the enhancement layer video signals may comprise residual values, quantization parameters, and mapping parameters based in part on a prediction method corresponding to a specific method used in the advanced quantization.
    Type: Application
    Filed: September 29, 2016
    Publication date: January 19, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming SU, Sheng QU, Samir N. HULYALKAR, Tao CHEN, Walter C. GISH, Hubert KOEPFER
  • Publication number: 20170019646
    Abstract: A backlight for a display comprises a plurality of independently controllable light sources and inclined surfaces inclining in a radially outward direction from each light source for shaping the distribution of emitted light. The light sources may each comprise a group of differently-colored light emitters. The backlight may include light integrators configured to mix light of the differently-colored light emitters. Inclined surfaces for shaping the distribution of emitted light may be arranged around exits of the light integrators.
    Type: Application
    Filed: September 27, 2016
    Publication date: January 19, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Helge SEETZEN, Lorne A. WHITEHEAD, Gregory John WARD
  • Patent number: 9548713
    Abstract: Volume leveler controller and controlling method are disclosed. In one embodiment, A volume leveler controller includes an audio content classifier for identifying the content type of an audio signal in real time; and an adjusting unit for adjusting a volume leveler in a continuous manner based on the content type as identified. The adjusting unit may configured to positively correlate the dynamic gain of the volume leveler with informative content types of the audio signal, and negatively correlate the dynamic gain of the volume leveler with interfering content types of the audio signal.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: January 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jun Wang, Lie Lu, Alan Seefeldt
  • Patent number: 9548059
    Abstract: The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computational complexity. This is accomplished by means of frequency translation or folding in the subband domain, preferably integrated with spectral envelope adjustment in the same domain. The concept of dissonance guard-band filtering is further presented. The proposed invention offers a low-complexity, intermediate quality HFR method useful in speech and natural audio coding applications.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: January 17, 2017
    Assignee: Dolby International AB
    Inventors: Lars G. Liljeryd, Per Ekstrand, Fredrik Henn, Kristofer Kjoerling
  • Patent number: 9548063
    Abstract: Embodiments of method and apparatus for acoustic echo control are described. According to the method, an echo energy-based doubletalk detection is performed to determine whether there is a doubletalk in a microphone signal with reference to a loudspeaker signal. A spectral similarity between spectra of the microphone signal and the loudspeaker signal is calculated. It is determined that there is no doubletalk in the microphone signal if the spectral similarity is higher than a threshold level. Adaption of an adaptive filter for applying acoustic echo cancellation or acoustic echo suppression on the microphone signal is enabled if it is determined that there is no doubletalk in the microphone signal through the echo energy-based doubletalk detection, or there is no doubletalk through the spectral similarity-based doubletalk detection.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: January 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, JiaQuan Huo, Xuejing Sun, Glenn N. Dickins
  • Patent number: 9549201
    Abstract: Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: January 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Gary A. Demos
  • Patent number: 9549123
    Abstract: Techniques are described to combine image data from multiple images with different exposures into a relatively high dynamic range image. A first image of a scene may be generated with a first operational mode of an image processing system. A second image of the scene may be generated with a second different operational mode of the image processing system. The first image may be of a first spatial resolution, while the second image may be of a second spatial resolution. For example, the first spatial resolution may be higher than the second spatial resolution. The first image and the second image may be combined into an output image of the scene. The output image may be of a higher dynamic range than either of the first image and the second image and may be of a spatial resolution higher than the second spatial resolution.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: January 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Ajit Ninan, Gregory John Ward, Qifan Huang
  • Patent number: 9549194
    Abstract: Context based inverse mapping methods are provided. An image with pixel values within a lower dynamic range can be mapped to an image with pixel values within a higher dynamic range by utilizing context information associated with pixels in the lower dynamic range image.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: January 17, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Yan Ye, Alexandros Tourapis, Peng Yin, Yuwen He