Dolby Labs Patents Granted

Dolby Labs patent applications that are pending before the United States Patent and Trademark Office (USPTO).

  • 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: 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: 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: 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: 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: 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: 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
  • 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: 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: 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
  • 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: 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: 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: 10089991
    Abstract: A method (600) for generating a bitstream (500) indicative of an object based audio program is described. The bitstream (500) comprises a sequence of containers (501). A first container (501) of the sequence of containers (501) comprises a plurality of substream entities (520) for a plurality of substreams (411, 412, 413, 414) of the object based audio program and a presentation section (510). The method (600) comprises determining (601) a set of object channels (424). The method (600) further comprises providing (602) a set of object related metadata (434, 444) for the set of object channels (424). In addition, the method (600) comprises inserting (603) a first set of object channel frames and a first set of object related metadata frames into a respective set of substream entities (520) of the first container (501). Furthermore, the method (600) comprises inserting (604) presentation data into the presentation section (510).
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: October 2, 2018
    Assignee: Dolby International AB
    Inventors: Christof Fersch, Alexander Groeschel
  • 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: 10091603
    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 15, 2017
    Date of Patent: October 2, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10091601
    Abstract: Multi-channel audio content is mixed for a particular loudspeaker setup. However, a consumer's audio setup is very likely to use a different placement of speakers. The present invention provides a method of rendering multi-channel audio that assures replay of the spatial signal components with equal loudness of the signal. A method for obtaining an energy preserving mixing matrix (G) for mixing L1 input audio channels to L2 output channels comprises steps of obtaining a first mixing matrix ?, performing a singular value decomposition on the first mixing matrix ? to obtain a singularity matrix S, processing the singularity matrix S to obtain a processed singularity matrix ?, determining a scaling factor a, and calculating an improved mixing matrix G according to G=aU?VT. The perceived sound, loudness, timbre and spatial impression of multi-channel audio replayed on an arbitrary loudspeaker setup practically equals that of the original speaker setup.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 2, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Johannes Boehm
  • 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: 10083701
    Abstract: Encoding and decoding devices for encoding the channels of an audio system having at least four channels are disclosed. The decoding device has a first stereo decoding component which subjects a first pair of input channels to a first stereo decoding, and a second stereo decoding component which subjects a second pair of input channels to a second stereo decoding. The results of the first and second stereo decoding components are crosswise coupled to a third and a fourth stereo decoding component which each performs stereo decoding on one channel resulting from the first stereo decoding component, and one channel resulting from the second stereo decoding component.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: September 25, 2018
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Harald Mundt, Heiko Purnhagen
  • Patent number: 10085105
    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 15, 2017
    Date of Patent: September 25, 2018
    Assignee: Dolby International AB
    Inventor: Lars Villemoes
  • Patent number: 10080035
    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: September 8, 2017
    Date of Patent: September 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Gary A. Demos
  • Patent number: 10079941
    Abstract: A method in a soundfield-capturing endpoint and the capturing endpoint that comprises a microphone array capturing soundfield, and an input processor pre-processing and performing auditory scene analysis to detect local sound objects and positions, de-clutter the sound objects, and integrate with auxiliary audio signals to form a de-cluttered local auditory scene that has a measure of plausibility and perceptual continuity. The input processor also codes the resulting de-cluttered auditory scene to form coded scene data comprising mono audio and additional scene data to send to others. The endpoint includes an output processor generating signals for a display unit that displays a summary of the de-cluttered local auditory scene and/or a summary of activity in the communication system from received data, the display including a shaped ribbon display element that has an extent with locations on the extent representing locations and other properties of different sound objects.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: September 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. Dickins, Gary Spittle, David Gunawan, Anthony Tucker
  • Patent number: 10080026
    Abstract: Statistical values are computed based on received source images. An adaptive reshaping function is selected for one or more source images based on the one or more statistical values. A portion of source video content is adaptively reshaped, based on the selected adaptive reshaping function to generate a portion of reshaped video content. The portion of source video content is represented by the one or more source images. An approximation of an inverse of the selected adaptive reshaping function is generated. The reshaped video content and a set of adaptive reshaping parameters defining the approximation of the inverse of the selected adaptive reshaping function are encoded into a reshaped video signal. The reshaped video signal may be processed by a downstream recipient device to generate a version of reconstructed source images, for example, for rendering with a display device.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: September 18, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Qiuwei Wang, Hsuan-Ting Chou, Navaneeth Kamballur Kottayil
  • Patent number: 10074012
    Abstract: Image data relating to real-world objects or persons is collected from a scene while collecting audio data relating to the real-world objects or persons from the same scene. The audio data is used to derive sound objects corresponding to the real-world objects or persons. The image data is used to derive video objects corresponding to the real-world objects or persons. Based on the sound objects and the video objects, candidate salient objects are generated. A salient object is selected from among the candidate salient objects. Perceptual enhancement operations are performed on the selected salient object.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: September 11, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Cong Zhou, Timo Kunkel, Cristina Michel Vasco
  • Patent number: 10074382
    Abstract: The present document relates to the determination of a 200 bitrate related to an encoded bitstream, and describes a method for determining an estimate of a bitrate of a bitstream comprising a sequence of frames comprising a varying number of bitsand corresponding to excerpts of an audio and/or video signal. At least two frames of the sequence of frames comprise a parameter indicative of a processing delay for the corresponding frame. The method comprises determining: a total number of bits for a subsequence of frames from the bitstream; a corrected number 201 of frames based on a number of frames comprised within the subsequence and the parameters of at least two frames of the subsequence; and a lower bitrate bound and an upper bitrate bound of the bitrate based on the total number of bits, the corrected number of frames and a frame rate of the bitstream.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: September 11, 2018
    Assignee: Dolby International AB
    Inventors: Holger Hoerich, Alexander Groeschel, Jens Popp, Marc Roessler, Malte Schmidt
  • Patent number: 10074379
    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: Grant
    Filed: January 26, 2018
    Date of Patent: September 11, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Jeffrey Riedmiller, Karl J. Roeden, Kristofer Kjoerling, Heiko Purnhagen, Vinay Melkote, Leif Sehlstrom
  • Patent number: 10075799
    Abstract: The invention discloses rendering sound field signals, such as Higher-Order Ambisonics (HOA), for arbitrary loudspeaker setups, where the rendering results in highly improved localization properties and is energy preserving. This is obtained by a new type of decode matrix for sound field data, and a new way to obtain the decode matrix.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 11, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Johannes Boehm, Florian Keiler
  • Patent number: 10070243
    Abstract: Audio content coded for a reference speaker configuration is downmixed to downmix audio content coded for a specific speaker configuration. One or more gain adjustments are performed on individual portions of the downmix audio content coded for the specific speaker configuration. Loudness measurements are then performed on the individual portions of the downmix audio content. An audio signal that comprises the audio content coded for the reference speaker configuration and downmix loudness metadata is generated. The downmix loudness metadata is created based at least in part on the loudness measurements on the individual portions of the downmix audio content.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: September 4, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Michael Ward, Jeffrey Riedmiller, Scott Gregory Norcross, Alexander Groeschel
  • Patent number: 10068577
    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: Grant
    Filed: April 23, 2015
    Date of Patent: September 4, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Vinay Melkote, Malcolm James Law, Roy M. Fejgin
  • Patent number: 10063845
    Abstract: A 3D display is characterized by a quality of viewing experience (QVE) mapping which represents a display-specific input-output relationship between input depth values and output QVE values. Examples of QVE mappings based on a metric of “viewing blur” are presented. Given reference depth data generated for a reference display and a representation of an artist's mapping function, which represents an input-output relationship between original input depth data and QVE data generated using a QVE mapping for a reference display, a decoder may reconstruct the reference depth data and apply an inverse QVE mapping for a target display to generate output depth data optimized for the target display.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: August 28, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Gopi Lakshminarayan, Samir Hulyalkar, Tao Chen, Hariharan Ganapathy, Santosh Chilkunda
  • Patent number: 10063985
    Abstract: Audio signals (201) are received. The audio signals include left and right surround channels (206). The audio signals are played back using far-field loudspeakers (101-108, 401-406) distributed around a space (111, 409) having a plurality of listener positions (112, 410). The left and right surround channels are played back by a pair of far-field loudspeakers (103, 106, 403, 405) arranged at opposite sides of the space having the plurality of listener positions. An audio component (208) coinciding with or approximating audio content common to the left and right surround channels is obtained. The audio component is played back using at least a pair of near-field transducers (109, 110, 407, 408) arranged at one of the listener positions. Associated systems (100, 400), methods (800) and computer program products are provided.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: August 28, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Remi Audfray, Nicolas R. Tsingos, Jurgen W. Scharpf
  • Patent number: 10062333
    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: Grant
    Filed: October 5, 2016
    Date of Patent: August 28, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Suzanne Farrell, Scott Daly, Robin Atkins, Timo Kunkel, Kimball Darr Thurston, III
  • Patent number: 10056042
    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: Grant
    Filed: May 11, 2016
    Date of Patent: August 21, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Gregory John Ward, Samir N. Hulyalkar, Guan-Ming Su, Sheng Qu
  • Patent number: 10055866
    Abstract: Systems and methods for overlaying a second image/video data onto a first image/video data are described herein. The first image/video data may be intended to be rendered on a display with certain characteristics—e.g., HDR, EDR, VDR or UHD capabilities. The second image/video data may comprise graphics, closed captioning, text, advertisement—or any data that may be desired to be overlaid and/or composited onto the first image/video data. The second image/video data may be appearance mapped according to the image statistics and/or characteristics of the first image/video data. In addition, such appearance mapping may be made according to the characteristics of the display that the composite data is to be rendered. Such appearance mapping is desired to render a composite data that is visually pleasing to a viewer, rendered upon a desired display.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: August 21, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Timo Kunkel, Ning Xu, Tao Chen, Bongsun Lee, Samir N. Hulyalkar
  • Patent number: 10057808
    Abstract: The present disclosure provides methods, devices and computer program products for non-uniform quantization of parameters relating to parametric spatial coding of audio signals. The disclosure further relates to a method and apparatus for reconstructing an audio object in an audio decoding system taking the non-uniformly quantized parameters into account. According to the disclosure, such an approach renders it possible to reduce bit consumption without substantially reducing the quality of the reconstructed audio object.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: August 21, 2018
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Per Ekstrand
  • Patent number: 10056055
    Abstract: Apparatus and methods for mapping video signal parameters such as tone and color may be applied at various points in a video generation and delivery pipeline. apparatus may be configured to control mappings based on a range of inputs which may include one or more of: ambient conditions, user inputs, control information, adaptation models. Apparatus and methods may be applied to display video or other images so as to preserve a creative intent embodied in video or other image data.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: August 21, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Helge Seetzen, Robin Atkins, Neil W. Messmer, Gerwin Damberg
  • Patent number: 10057708
    Abstract: Embodiments are described for an adaptive audio system that processes audio data comprising a number of independent monophonic audio streams. One or more of the streams has associated with it metadata that specifies whether the stream is a channel-based or object-based stream. Channel-based streams have rendering information encoded by means of channel name; and the object-based streams have location information encoded through location expressions encoded in the associated metadata. A codec packages the independent audio streams into a single serial bitstream that contains all of the audio data. This configuration allows for the sound to be rendered according to an allocentric frame of reference, in which the rendering location of a sound is based on the characteristics of the playback environment (e.g., room size, shape, etc.) to correspond to the mixer's intent.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: August 21, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Charles Q. Robinson, Nicolas R. Tsingos, Christophe Chabanne
  • Patent number: 10057581
    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: June 15, 2017
    Date of Patent: August 21, 2018
    Assignee: Dolby International AB
    Inventors: Yeping Su, Christopher A. Segall
  • Patent number: 10057707
    Abstract: Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations involve receiving or determining conversational dynamics data. One or more variables of a cost function may be based, at least in part, on the conversational dynamics data. The cost function may be a spatial optimization cost function of a vector describing a virtual conference participant position for each of the conference participants in a virtual acoustic space. The virtual acoustic space may be determined relative to a listener's head. The virtual conference participant positions may be assigned according to a solution of the cost function.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: August 21, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Richard J. Cartwright, Hannes Muesch
  • Patent number: 10051400
    Abstract: A method of outputting audio in a teleconferencing environment includes receiving audio streams, processing the audio streams according to information regarding effective spatial positions, and outputting, by at least three speakers arranged in more than one dimension, the audio streams having been processed. The information regarding the plurality of effective spatial positions corresponds to a perceived spatial scene that extends beyond the speakers in at least two dimensions. In this manner, participants in the teleconference perceive the audio from the remote participants as originating at different positions in the teleconference room.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: August 14, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: David S. McGrath, Glenn N. Dickins, Paul Holmberg, Gary Spittle, Michael Eckert
  • Patent number: 10049683
    Abstract: This disclosure falls into the field of audio coding, in particular it is related to the field of spatial audio coding, where the audio information is represented by multiple signals, where the signals may comprise audio channels or/and audio objects. In particular the disclosure provides a method and apparatus for reconstructing audio objects in an audio decoding system. Furthermore, this disclosure provides a method and apparatus for encoding such audio objects.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: August 14, 2018
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Janusz Klejsa, Lars Villemoes, Toni Hirvonen
  • Patent number: 10044337
    Abstract: Equalizer controller and controlling method are disclosed. In one embodiment, an equalizer controller includes an audio classifier for identifying the audio type of an audio signal in real time; and an adjusting unit for adjusting an equalizer in a continuous manner based on the confidence value of the audio type as identified.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: August 7, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Lie Lu, Jun Wang, Alan J. Seefeldt, Mingqing Hu
  • Patent number: 10043528
    Abstract: The present document relates an audio encoding and decoding system (referred to as an audio codec system). In particular, the present document relates to a transform-based audio codec system which is particularly well suited for voice encoding/decoding. A transform-based speech encoder (100, 170) configured to encode a speech signal into a bitstream is described. The encoder (100, 170) comprises a framing unit (101) configured to receive a set (132, 332) of blocks; wherein the set (132, 332) of blocks comprises a plurality of sequential blocks (131) of transform coefficients; wherein the plurality of blocks (131) is indicative of samples of the speech signal; wherein a block (131) of transform coefficients comprises a plurality of transform coefficients for a corresponding plurality of frequency bins (301).
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: August 7, 2018
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Janusz Klejsa, Per Hedelin
  • Patent number: D828845
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: September 18, 2018
    Assignee: Dolby International AB
    Inventors: Sigrid Harder, Robert Andrew France, Thomas Ziegler, Radoslaw Musial, Christopher Oates
  • Patent number: RE47076
    Abstract: A picture coding method of the present invention codes a picture signal and a ratio of a number of luminance pixels and a number of chrominance pixels for the picture signal, and then one coding method out of at least two coding methods is selected depending on the ratio. Next, data related to a picture size is coded in accordance with the selected coding method. The data related to the picture size indicates a size of the picture corresponding to the picture signal or an output area, which is a pixel area to be outputted in decoding in a whole pixel area coded in the picture signal coding.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: October 2, 2018
    Assignee: Dolby International AB
    Inventor: Shinya Kadono
  • 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