Dolby Labs Patent Applications

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

  • Publication number: 20200202878
    Abstract: On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (?) from the bitstream, where 1?m<n. Also derived from the bitstream are pre-processing dynamic range control, DRC, parameters (DRC2) quantifying an encoder-side dynamic range limiting of the core signal. The n-channel audio signal is obtained by parametric synthesis in accordance with the multichannel coding parameters and while cancelling any encoder-side dynamic range limiting based on the pre-processing DRC parameters. In particular embodiments, the reconstruction further includes use of compensated post-processing DRC parameters quantifying a potential decoder-side dynamic range compression. Cancellation of an encoder-side range limitation and range compression are preferably performed by different decoder-side components. Cancellation and compression may be coordinated by a DRC pre-processor.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Jeffrey RIEDMILLER, Karl J. ROEDEN, Kristofer KJOERLING, Heiko PURNHAGEN, Vinay MELKOTE, Leif SEHLSTROM
  • Publication number: 20200202814
    Abstract: One or more media contents are received. A viewer's light adaptive states are predicted as a function of time as if the viewer is watching display mapped images derived from the one or more media contents. The viewer's light adaptive states are used to detect an excessive change in luminance in a specific media content portion of the one or more media contents. The excessive change in luminance in the specific media content portion of the one or more media contents is caused to be reduced while the viewer is watching one or more corresponding display mapped images derived from the specific media content portion of the one or more media contents.
    Type: Application
    Filed: December 17, 2019
    Publication date: June 25, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Alexandre CHAPIRO, Robin ATKINS, Scott DALY
  • Publication number: 20200201160
    Abstract: A novel light source for a 3D display system includes a plurality of left eye light emitters and a plurality of right eye light emitters. The left eye emitters include a broad spectral distribution emitter and an overlapping narrow spectral distribution emitter in each of the blue, green, and red color bands. Similarly, the right eye emitters include a broad spectral distribution emitter and an overlapping narrow spectral distribution emitter in each of the blue, green, and red color bands. The combined spectral distributions of each of the broad and narrow emitters provide a primary light for each color and for each eye that has a desirable spectral shape, including wide bandwidth and short tail(s). The invention thus minimizes cross-talk and speckling in left- and right-eye images of 3D display systems.
    Type: Application
    Filed: March 2, 2020
    Publication date: June 25, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Barret LIPPEY, Martin J. RICHARDS
  • Publication number: 20200194011
    Abstract: The present document describes a method for allocating bits to a frame of a sequence of frames to yield a bitstream having a constant average bitrate, wherein the frame comprises audio data and metadata. The method comprises maintaining an overall bit reservoir and maintaining a virtual bit reservoir being a subset of the overall bit reservoir, such that bits for the metadata of the frame are allocated from the virtual bit reservoir and such that bits for the audio data of the frame are allocated from the overall bit reservoir.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Michael SCHUG, Holger HOERICH, Tobias R. WAGENBLASS, Christof FERSCH, Karsten LINZMEIER
  • Publication number: 20200184983
    Abstract: Methods, systems, and computer program products that provide streaming capabilities to audio input and output devices are disclosed. An audio processing device connects an upstream device to a downstream device. The upstream device is plugged into an input port of the audio processing device. The audio processing device intercepts a signal from the upstream device to the downstream device. The audio processing device converts the signal to digital data and streams the digital data to a server. The digital data can include metadata, e.g., an input gain. The audio processing device can adjust the input gain in response to instructions from the server. The audio processing device feeds a pass-through copy of the audio signal to an output port. A user can connect the downstream device in a usual signal chain into the output port of the audio processing device. The streaming does not affect the user's workflow.
    Type: Application
    Filed: July 12, 2018
    Publication date: June 11, 2020
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Giulio CENGARLE, Antonio MATEOS SOLE, Davide SCAINI, Suraj Suhas BARKALE
  • Publication number: 20200177837
    Abstract: Systems and methods are described for detecting and remedying potential incongruence in a video conference. A camera of a video conferencing system may capture video images of a conference room. A processor of the video conferencing system may identify locations of a plurality of participants within an image plane of a video image. Using face and shape detection, a location of a center point of each identified participant's torso may be calculated. A region of congruence bounded by key parallax lines may be calculated, the key parallax lines being a subset of all parallax lines running through the center points of each identified participant. When the audio device location is not within the region of congruence, audio captured by an audio device may be adjusted to reduce effects of incongruence when the captured audio is replayed at a far end of the video conference.
    Type: Application
    Filed: February 10, 2020
    Publication date: June 4, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Glenn N. DICKINS, Ludovic Christophe MALFAIT, David GUNAWAN
  • Publication number: 20200178015
    Abstract: The present disclosure relates to a method of converting an audio signal in an intermediate signal format to a set of speaker feeds suitable for playback by an array of speakers. The audio signal in the intermediate signal format is obtainable from an input audio signal by means of a spatial panning function. The method comprises determining a discrete panning function for the array of speakers, determining a target panning function based on the discrete panning function, wherein determining the target panning function involves smoothing the discrete panning function, and determining a rendering operation for converting the audio signal in the intermediate signal format to the set of speaker feeds, based on the target panning function and the spatial panning function. The present disclosure further relates to a corresponding apparatus and a corresponding computer-readable storage medium.
    Type: Application
    Filed: May 14, 2018
    Publication date: June 4, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: David S. MCGRATH
  • Publication number: 20200176008
    Abstract: Many portable playback devices cannot decode and playback encoded audio content having wide bandwidth and wide dynamic range with consistent loudness and intelligibility unless the encoded audio content has been prepared specially for these devices. This problem can be overcome by including with the encoded content some metadata that specifies a suitable dynamic range compression profile by either absolute values or differential values relative to another known compression profile. A playback device may also adaptively apply gain and limiting to the playback audio. Implementations in encoders, in transcoders and in decoders are disclosed.
    Type: Application
    Filed: February 11, 2020
    Publication date: June 4, 2020
    Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL AB
    Inventors: Jeffrey Riedmiller, Harald Mundt, Michael Schug, Martin Wolters
  • Publication number: 20200177917
    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: Application
    Filed: February 10, 2020
    Publication date: June 4, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Philippe BORDES, Pierre ANDRIVON, Emmanuel JOLLY
  • Publication number: 20200169742
    Abstract: In some embodiments, an encoder device is disclosed to generate single-channel standard dynamic range/high dynamic range content predictors. The device receives a standard dynamic range image content and a representation of a high dynamic range image content. The device determines a first mapping function to map the standard dynamic range image content to the high dynamic range image content. The device generates a single channel prediction metadata based on the first mapping function, such that a decoder device can subsequently render a predicted high dynamic range image content by applying the metadata to transform the standard dynamic range image content to the predicted high definition image content.
    Type: Application
    Filed: July 24, 2018
    Publication date: May 28, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming SU, Tao CHEN, Qian CHEN
  • Publication number: 20200169824
    Abstract: Apparatus, computer readable media and methods for processing a multi-channel, spatial audio format input signal. For example, one such method comprises determining object location metadata based on the received spatial audio format input signal; and extracting object audio signals based on the received spatial audio format input signal, wherein the extracting object audio signals based on the received spatial audio format input signal includes determining object audio signals and residual audio signals.
    Type: Application
    Filed: May 2, 2018
    Publication date: May 28, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventor: David S. MCGRATH
  • Publication number: 20200162835
    Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.
    Type: Application
    Filed: January 22, 2020
    Publication date: May 21, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Grant A. DAVIDSON, Kuan-Chieh YEN, Dirk Jeroen BREEBAART
  • Publication number: 20200159032
    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: January 27, 2020
    Publication date: May 21, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Martin J. RICHARDS, Duane Scott DEWALD, Nathan WAINWRIGHT, Barret LIPPEY
  • Publication number: 20200162603
    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 a method and device for reducing a prediction error of the voice quality estimation by considering the content of lost packets. Furthermore, this disclosure provides a method and device which uses a voice quality estimating algorithm to calculate the voice quality estimate based on an input which is switchable between a first and a second input mode.
    Type: Application
    Filed: October 21, 2019
    Publication date: May 21, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Doh-Suk KIM, Shen HUANG
  • Publication number: 20200162759
    Abstract: In a method to improve the coding efficiency of high-dynamic range (HDR) images, a decoder parses sequence processing set (SPS) data from an input coded bitstream to detect that an HDR extension syntax structure is present in the parsed SPS data. It extracts from the HDR extension syntax structure post-processing information that includes one or more of a color space enabled flag, a color enhancement enabled flag, an adaptive reshaping enabled flag, a dynamic range conversion flag, a color correction enabled flag, or an SDR viewable flag. It decodes the input bitstream to generate a preliminary output decoded signal, and generates a second output signal based on the preliminary output signal and the post-processing information.
    Type: Application
    Filed: December 11, 2019
    Publication date: May 21, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Peng YIN, Taoran LU, Fangjun PU, Tao CHEN, Walter J. HUSAK
  • Publication number: 20200145779
    Abstract: Embodiments are described for an adaptive audio system that processes audio data comprising a number of independent monophonic audio streams. One or more of the streams has associated with it metadata that specifies whether the stream is a channel-based or object-based stream. Channel-based streams have rendering information encoded by means of channel name; and the object-based streams have location information encoded through location expressions encoded in the associated metadata. A codec packages the independent audio streams into a single serial bitstream that contains all of the audio data. This configuration allows for the sound to be rendered according to an allocentric frame of reference, in which the rendering location of a sound is based on the characteristics of the playback environment (e.g., room size, shape, etc.) to correspond to the mixer's intent.
    Type: Application
    Filed: November 11, 2019
    Publication date: May 7, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Charles Q. ROBINSON, Nicolas R. TSINGOS, Christophe CHABANNE
  • Publication number: 20200143817
    Abstract: According to an aspect of the present invention, a method for reconstructing an audio signal having a baseband portion and a highband portion is disclosed. The method includes obtaining a decoded baseband audio signal by decoding an encoded audio signal and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal. The method further includes generating a noise component based on a noise parameter. Finally, the method includes adjusting a phase of the high-frequency reconstructed signal and obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal to obtain a time-domain reconstructed audio signal.
    Type: Application
    Filed: January 6, 2020
    Publication date: May 7, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Michael M. Truman, Mark S. Vinton
  • Publication number: 20200144979
    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: Application
    Filed: December 29, 2019
    Publication date: May 7, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Brett G. CROCKETT, Alan J. SEEFELDT
  • Publication number: 20200145773
    Abstract: Methods, systems, and computer program products for rending an audio object having an apparent size are disclosed. An audio processing system receives audio panning data including a first grid mapping first virtual sound sources in a space and speaker positions to speaker gains. The first grid specifies first speaker gains of the first virtual sound sources in the space. The audio processing system determines a second grid of second virtual sound sources in the space, including mapping the first virtual sound sources into the second virtual sound sources of the second virtual sources. The audio processing system selects at least one of the first grid or second grid for rendering an audio object based on an apparent size of the audio object. The audio processing system renders the audio object based on the selected grid or grids.
    Type: Application
    Filed: May 1, 2018
    Publication date: May 7, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Daniel Arteaga, Giulio Cengarle, Antonio Mateos Sole
  • Publication number: 20200143117
    Abstract: A plurality of utterances of a first user from the language of the first user is translated into a language of a second user. The confidence scores associated with the translated utterances are compared with a confidence threshold. A predetermined utterance gap is adjusted based on the comparison. The predetermined utterance gap is a duration of time that occurs between utterances.
    Type: Application
    Filed: October 7, 2019
    Publication date: May 7, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Jeffrey BAKER, Sal Gregory GARCIA, Paul Anthony LONG
  • Publication number: 20200133627
    Abstract: Active acoustic filter systems and methods are disclosed. An active acoustic filter system includes a memory storing one or more stored sound profiles and a respective set of processing parameters associated with each of the one or more stored sound profiles. A processor coupled to the memory generates processed sound by processing ambient sound in accordance with a set of processing parameters retrieved from the memory based on results from comparing an ambient sound profile to at least one of the one or more stored sound profiles.
    Type: Application
    Filed: November 1, 2019
    Publication date: April 30, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Noah KRAFT, Richard Fritz LANMAN, III, Daniel C. WIGGINS, Jeffrey BAKER
  • Publication number: 20200134780
    Abstract: Peripheral-vision expanded images are streamed to a video streaming client. The peripheral-vision expanded images are generated from source images in reference to view directions of the viewer at respective time points. View direction data is collected and received in real time while the viewer is viewing display images derived from the peripheral-vision expanded images. A second peripheral-vision expanded image is generated from a second source image in reference to a second view direction of the viewer at a second time point. The second peripheral-vision expanded image has a focal-vision image portion covering the second view direction of the viewer and a peripheral-vision image portion outside the focal-vision image portion. The second peripheral-vision expanded image is transmitted to the video streaming client.
    Type: Application
    Filed: October 22, 2019
    Publication date: April 30, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Alexandre Chapiro, Chaitanya Atluru, Chun Chi Wan, Haricharan Lakshman, William Rozzi, Shane Ruggieri, Ajit Ninan
  • Publication number: 20200137493
    Abstract: Methods and systems for generating a speaker feed for driving a sealed speaker, including: generating feedback indicative of excursion of the speaker; in response to the feedback, equalizing an input signal to generate the speaker feed, such that the speaker feed is equalized for driving the speaker with: a desired frequency response above the speaker's resonance frequency; and an at least substantially flat frequency response in a variable sub-resonance equalization band without exceeding the speaker's excursion limit, where the sub-resonance equalization band extends from the resonance frequency down to a variable cutoff frequency, and the cutoff frequency is determined in response to the feedback.
    Type: Application
    Filed: April 16, 2018
    Publication date: April 30, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: Douglas MANDELL
  • Publication number: 20200126570
    Abstract: Methods for generating an object based audio program, renderable in a personalizable manner, and including a bed of speaker channels renderable in the absence of selection of other program content (e.g., to provide a default full range audio experience). Other embodiments include steps of delivering, decoding, and/or rendering such a program. Rendering of content of the bed, or of a selected mix of other content of the program, may provide an immersive experience. The program may include multiple object channels (e.g., object channels indicative of user-selectable and user-configurable objects), the bed of speaker channels, and other speaker channels. Another aspect is an audio processing unit (e.g., encoder or decoder) configured to perform, or which includes a buffer memory which stores at least one frame (or other segment) of an object based audio program (or bitstream thereof) generated in accordance with, any embodiment of the method.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Sripal S. MEHTA, Thomas ZIEGLER, Giles BAKER, Jeffrey RIEDMILLER, Prinyar SAUNGSOMBOON
  • Publication number: 20200126568
    Abstract: Methods for generating an object based audio program which is renderable in a personalizable manner, e.g., to provide an immersive, perception of audio content of the program. Other embodiments include steps of delivering (e.g., broadcasting), decoding, and/or rendering such a program. Rendering of audio objects indicated by the program may provide an immersive experience. The audio content of the program may be indicative of multiple object channels (e.g., object channels indicative of user-selectable and user-configurable objects, and typically also a default set of objects which will be rendered in the absence of a selection by a user) and a bed of speaker channels. Another aspect is an audio processing unit (e.g., encoder or decoder) configured to perform, or which includes a buffer memory which stores at least one frame (or other segment) of an object based audio program (or bitstream thereof) generated in accordance with, any embodiment of the method.
    Type: Application
    Filed: December 17, 2019
    Publication date: April 23, 2020
    Applicants: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Robert Andrew FRANCE, Thomas ZIEGLER, Sripal S. MEHTA, Andrew Jonathan DOWELL, Prinyar SAUNGSOMBOON, Michael David DWYER, Farhad FARAHANI, Nicolas R. TSINGOS, Freddie SANCHEZ
  • Publication number: 20200126574
    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 audio codec system which is particularly well suited for voice encoding/decoding. A transform-based speech encoder is configured to encode a speech signal into a bitstream is described. A speech decoder configured to decode audio signals from a bitstream is further described.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Lars VILLEMOES, Janusz KLEJSA, Per HEDELIN
  • Publication number: 20200127865
    Abstract: Some aspects of the present disclosure involve the recording, processing and playback of audio data corresponding to conferences, such as teleconferences. In some teleconference implementations, the audio experience heard when a recording of the conference is played back may be substantially different from the audio experience of an individual conference participant during the original teleconference. In some implementations, the recorded audio data may include at least some audio data that was not available during the teleconference. In some examples, the spatial characteristics of the played-back audio data may be different from that of the audio heard by participants of the teleconference.
    Type: Application
    Filed: December 19, 2019
    Publication date: April 23, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Richard J. CARTWRIGHT, Glenn N. DICKINS
  • Publication number: 20200127846
    Abstract: The present document relates to transcoding of metadata, and in particular to a method and system for transcoding metadata with reduced computational complexity. A transcoder configured to transcode an inbound bitstream comprising an inbound content frame and an associated inbound metadata frame into an outbound bitstream comprising an outbound content frame and an associated outbound metadata frame is described. The inbound content frame is indicative of a signal encoded according to a first codec system and the outbound content frame is indicative of the signal encoded according to a second codec system. The transcoder is configured to identify an inbound block of metadata from the inbound metadata frame, the inbound block of metadata associated with an inbound descriptor indicative of one or more properties of metadata comprised within the inbound block of metadata, and to generate the outbound metadata frame from the inbound metadata frame based on the inbound descriptor.
    Type: Application
    Filed: December 17, 2019
    Publication date: April 23, 2020
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Andreas SCHNEIDER, Christof FERSCH, Martin WOLTERS, Jeffrey RIEDMILLER, Scott Gregory NORCROSS, Michael GRANT
  • Publication number: 20200126572
    Abstract: The present disclosure relates to methods and apparatus for audio coding. A method of encoding a portion of an audio signal comprises determining whether the portion of the audio signal is likely to contain dense transient events, and if it is determined that the portion of the audio signal is likely to contain dense transient events, quantizing the portion of the audio signal using a quantization 5 mode that applies a substantially constant signal-to-noise ratio over frequency for the portion of the audio signal. The present disclosure further relates to a method of detecting dense transient events in a portion of an audio signal.
    Type: Application
    Filed: July 3, 2018
    Publication date: April 23, 2020
    Applicant: Dolby International AB
    Inventors: Arijit BISWAS, Michael SCHUG, Harald MUNDT
  • Publication number: 20200126579
    Abstract: Higher Order Ambisonics represents three-dimensional sound independent of a specific loudspeaker set-up. However, transmission of an HOA representation results in a very high bit rate. Therefore compression with a fixed number of channels is used, in which directional and ambient signal components are processed differently. For coding, portions of the original HOA representation are predicted from the directional signal components. This prediction provides side information which is required for a corresponding decoding. By using some additional specific purpose bits, a known side information coding processing is improved in that the required number of bits for coding that side information is reduced on average.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger, Oliver Wuebbolt
  • Publication number: 20200127577
    Abstract: Apparatus and methods for controlling a jitter buffer are described. In one embodiment, the apparatus for controlling a jitter buffer includes an inter-talkspurt delay jitter estimator for estimating an offset value of the delay of a first frame in the current talkspurt with respect to the delay of a latest anchor frame in a previous talkspurt, and a jitter buffer controller for adjusting a length of the jitter buffer based on a long term length of the jitter buffer for each frame and the offset value.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Xuejing SUN, Zhiwei SHUANG
  • Publication number: 20200118574
    Abstract: The present invention relates to methods and apparatus for encoding an HOA signal representation (c(t)) of a sound field having an order of N and a number O=(N+1)2 of coefficient sequences to a mezzanine HOA signal representation (wMEZZ(t)). The present invention further relates to methods and apparatus for decoding a reconstructed HOA signal representation from the mezzanine HOA signal representation.
    Type: Application
    Filed: December 10, 2019
    Publication date: April 16, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Florian Keiler, Sven Kordon, Alexander Krueger
  • Publication number: 20200120437
    Abstract: A method for creating an output soundfield signal from an input soundfield signal, the method including the steps of: (a) forming at least one delayed signals from the input soundfield signal, (b) for each of the delayed signals, creating an acoustically transformed delayed signal, by an acoustic transformation process, and (c) combining together the acoustically transformed delayed signals and the input soundfield signal to produce the output soundfield signal.
    Type: Application
    Filed: July 27, 2016
    Publication date: April 16, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: David S. MCGRATH, Rhonda WILSON
  • Publication number: 20200118534
    Abstract: This disclosure falls into the field of adapting external content to a video stream, and more specifically it is related to analyzing the video stream to define a suitable narrative model, and adapting the external content based on this narrative model.
    Type: Application
    Filed: June 26, 2018
    Publication date: April 16, 2020
    Applicant: Dolby International AB
    Inventor: Antonio MATEOS SOLE
  • Publication number: 20200120436
    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: Application
    Filed: December 16, 2019
    Publication date: April 16, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger, Oliver Wuebbolt
  • Publication number: 20200112706
    Abstract: A novel projection system includes first and second light sources (e.g., sets of lasers), a spatial light modulator (SLM) that receives light from the first light source, and a beam steering device that receives light from the second light source and steers the light to highlight regions of the SLM. The SLM then modulates the light from both light sources to generate a highlighted imaging beam which can then be projected on a viewing surface. The highlighted imaging beam can represent a highlighted 2D image or a highlighted left- or right-eye view of a 3D image. The projection system thus improves peak brightness in the displayed highlighted images without incorporating a separate highlight projector or other expensive equipment. Methods for highlighting projected images are also described.
    Type: Application
    Filed: December 10, 2019
    Publication date: April 9, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Martin J. RICHARDS, Barret LIPPEY
  • Publication number: 20200111502
    Abstract: Embodiments relate to an audio processing unit that includes a bitstream payload deformatter and a decoding subsystem. The decoding subsystem is coupled to the bitstream payload deformatter and configured to decode at least a portion of a block of an encoded audio bitstream. The block includes a fill element with an identifier indicating a start of the fill element and fill data after the identifier. The fill data includes at least one flag identifying whether a base form of spectral band replication or an enhanced form of spectral band replication is to be performed on audio content of the block. The identifier is a three bit unsigned integer transmitted most significant bit first and having a value of 0x6.
    Type: Application
    Filed: December 10, 2019
    Publication date: April 9, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Lars Villemoes, Heiko Purnhagen, Per Ekstrand
  • Publication number: 20200098381
    Abstract: A method for decoding an encoded audio bitstream in an audio processing system is disclosed. The method includes extracting from the encoded audio bitstream a first waveform-coded signal comprising spectral coefficients corresponding to frequencies up to a first cross-over frequency for a time frame and performing parametric decoding at a second cross-over frequency for the time frame to generate a reconstructed signal. The second cross-over frequency is above the first cross-over frequency and the parametric decoding uses reconstruction parameters derived from the encoded audio bitstream to generate the reconstructed signal. The method also includes extracting from the encoded audio bitstream a second waveform-coded signal comprising spectral coefficients corresponding to a subset of frequencies above the first cross-over frequency for the time frame and interleaving the second waveform-coded signal with the reconstructed signal to produce an interleaved signal for the time frame.
    Type: Application
    Filed: October 4, 2019
    Publication date: March 26, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Kristofer KJOERLING, Heiko PURNHAGEN, Harald MUNDT, Karl Jonas ROEDEN, Leif SEHLSTROM
  • Publication number: 20200099930
    Abstract: The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Walter C. GISH, Christopher J. VOGT
  • Publication number: 20200098377
    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: November 26, 2019
    Publication date: March 26, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: Sven KORDON
  • Publication number: 20200099903
    Abstract: An image projector includes an image data input, a controller, a light source, illumination optics, an imaging spatial light modulator (SLM), and imaging optics. The controller is coupled to receive the image data and is operative to determine a thermal state of the image projector. The controller also adjusts the image data depending on the thermal state of the image projector to generate thermally adjusted image data. The thermal state of facilitates adjustment of the imaging data, because the thermal state is indicative of changes in the lightfield incident on the SLM.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Christopher John ORLICK, Jerome D. SHIELDS
  • Publication number: 20200094141
    Abstract: The present invention is directed to systems, methods and apparatus for processing media content for reproduction by a first apparatus. The method includes obtaining pose information indicative of a position and/or orientation of a user. The pose information is transmitted to a second apparatus that provides the media content. The media content is rendered based on the pose information to obtain rendered media content. The rendered media content is transmitted to the first apparatus for reproduction. The present invention may include a first apparatus for reproducing media content and a second apparatus storing the media content. The first apparatus is configured to obtain pose information indicative and transmit the pose information to the second apparatus; and the second apparatus is adapted to: render the media content based on the pose information to obtain rendered media content; and transmit the rendered media content to the first apparatus for reproduction.
    Type: Application
    Filed: June 15, 2018
    Publication date: March 26, 2020
    Applicants: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Christof Fersch, Nicolas R. Tsingos
  • Publication number: 20200099792
    Abstract: Described is a method of hosting a teleconference among a plurality of client devices arranged in two or more acoustic spaces, each client device having an audio capturing capability and/or an audio rendering capability, the method comprising: grouping the plurality of client devices into two or more groups based on their belonging to respective acoustic spaces, receiving first audio streams from the plurality of client devices, generating second audio streams from the first audio streams for rendering by respective client devices among the plurality of client devices, based on the grouping of the plurality of client devices into the two or more groups, and outputting the generated second audio streams to respective client devices. Further described are corresponding computation devise, computer programs, and computer-readable storage media.
    Type: Application
    Filed: September 18, 2019
    Publication date: March 26, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Khoa-Van NGUYEN, Stephane GIRAUDIE, Benoit SENARD
  • Publication number: 20200090677
    Abstract: The present disclosure provides new variants of non-negative matrix factorization suitable for separating desired audio content from undesired audio content. In certain embodiments, a multi-dimensional non-negative representation of an audio signal is decomposed into desired content and undesired content by performing convolutional non-negative matrix factorization (CNMF) on multiple layers, each layer having a respective non-negative matrix representation. In certain embodiments, the desired content is represented by a first dictionary and the undesired content is represented by a second dictionary, and sparsity is imposed on activations of basic elements of the first or the second dictionary, wherein a degree of sparsity is controlled by setting a minimum number of components with significant activations of the first or second dictionary, respectively.
    Type: Application
    Filed: September 16, 2019
    Publication date: March 19, 2020
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: PEDRO JAFETH VILLASANA TINAJERO, STANISLAW GORLOW
  • Publication number: 20200092668
    Abstract: Audio perception in local proximity to visual cues is provided. A device includes a video display, first row of audio transducers, and second row of audio transducers. The first and second rows can be vertically disposed above and below the video display. An audio transducer of the first row and an audio transducer of the second row form a column to produce, in concert, an audible signal. The perceived emanation of the audible signal is from a plane of the video display (e.g., a location of a visual cue) by weighing outputs of the audio transducers of the column. In certain embodiments, the audio transducers are spaced farther apart at a periphery for increased fidelity in a center portion of the plane and less fidelity at the periphery.
    Type: Application
    Filed: November 19, 2019
    Publication date: March 19, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Christophe Chabanne, Nicolas R. Tsingos, Charles Q. Robinson
  • Publication number: 20200089096
    Abstract: A novel projection system includes a base signal source, a highlight signal source, a base/highlight destination, and a shared optical element. A base signal provided by the base source and a highlight signal provided by the highlight source are combined by the shared optical element. In a particular embodiment, the base signal source and the highlight signal source each include a light source, a spatial light modulator, and optics, and the base/highlight destination includes optics and a spatial light modulator. In a more particular embodiment, the base signal source and the highlight source provide spatially modulated lightfields to the shared optical element. In another particular embodiment, the base signal and the highlight signal are modulated by the spatial light modulator of the base/highlight destination after being combined.
    Type: Application
    Filed: November 21, 2019
    Publication date: March 19, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Juan P. Pertierra, Martin J. Richards, Barret Lippey, Nathan S. Wainwright, John D. Jackson
  • Publication number: 20200092422
    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: November 21, 2019
    Publication date: March 19, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Glenn N. DICKINS, Richard J. CARTWRIGHT
  • Publication number: 20200082836
    Abstract: An audio communication endpoint receives a bitstream containing spectral components representing spectral content of an audio signal, wherein the spectral components relate to a first range extending up to a first break frequency, above which any spectral components are unassigned. The endpoint adapts the received bitstream in accordance with a second range extending up to a second break frequency by removing spectral components or adding neutral-valued spectral components relating to a range between the first and second break frequencies. The endpoint then attenuates spectral content in a neighbourhood of the least of the first and second break frequencies for thereby achieving a gradual spectral decay. After this, reconstructing the audio signal is reconstructed by an inverse transform operating on spectral components relating to said second range in the adapted and attenuated received bitstream. At small computational expense, the endpoint may to adapt to different sample rates in received bitstreams.
    Type: Application
    Filed: November 15, 2019
    Publication date: March 12, 2020
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Heiko PURNHAGEN, Leif SEHLSTROM, Lars VILLEMOES, Glenn N. DICKINS, Mark S. VINTON
  • Publication number: 20200084448
    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: November 11, 2019
    Publication date: March 12, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Wenhui JIA, Ajit NINAN, Arkady TEN, Gregory John WARD
  • Publication number: 20200084538
    Abstract: Embodiments are directed to an upward-firing speaker that reflects sound off a ceiling to a listening location at a distance from a speaker. The reflected sound provides height cues to reproduce audio objects that have overhead audio components. The speaker comprises a direct-firing tweeter and an upward-firing full-range driver in a unitary enclosure for playback of front-channel and height-channel signals, respectively. A crossover passes high frequencies of a front-channel signal directly to the tweeter and combines low frequencies of the front-channel signal with the height channel signal to be played through the full-range driver. A virtual height filter is applied to the height channel signal to improve the perception of height for audio signals transmitted by the virtual height speaker to provide optimum reproduction of the overhead reflected sound.
    Type: Application
    Filed: December 15, 2017
    Publication date: March 12, 2020
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: C. Phillip Brown, Michael J. Smithers