Dolby Labs Patents

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

Dolby Labs Patents by Type
  • Patent number: 10650833
    Abstract: A method for generating a bitstream indicative of an object based audio program is described. The bitstream comprises a sequence of containers. A first container of the sequence of containers comprises a plurality of substream entities for a plurality of substreams of the object based audio program and a presentation section. The method comprises determining a set of object channels. The method further comprises providing a set of object related metadata for the set of object channels. In addition, the method comprises inserting a first set of object channel frames and a first set of object related metadata frames into a respective set of substream entities of the first container. Furthermore, the method comprises inserting presentation data into the presentation section.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: May 12, 2020
    Assignee: Dolby International AB
    Inventors: Christof Fersch, Alexander Stahlmann
  • Patent number: 10650836
    Abstract: Example embodiments disclosed herein relate to signal processing. A method for decomposing a plurality of audio signals from at least two different channels is disclosed. The method comprises obtaining a set of components that are weakly correlated, the set of components generated based on the plurality of audio signals. The method comprises extracting a feature from the set of components, and determining a set of gains associated with the set of components at least in part based on the extracted feature, each of the gains indicating a proportion of a diffuse part in the associated component. The method further comprises decomposing the plurality of audio signals by applying the set of gains to the set of components. Corresponding system and computer program product are also disclosed.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: May 12, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jun Wang, Lie Lu
  • Patent number: 10652579
    Abstract: A target view to a 3D scene depicted by a multiview image is determined. The multiview image comprises multiple sampled views. Each sampled view comprises multiple texture images and multiple depth images in multiple image layers. The target view is used to select, from the multiple sampled views of the multiview image, sampled views. A texture image and a depth image for each sampled view in the selected sampled views are encoded into a multiview video signal to be transmitted to a downstream device.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: May 12, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Haricharan Lakshman, Ajit Ninan
  • 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
  • Patent number: 10643626
    Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: May 5, 2020
    Assignee: Dolby International AB
    Inventors: Tobias Friedrich, Alexander Mueller, Karsten Linzmeier, Claus-Christian Spenger, Tobias R. Wagenblass
  • Patent number: 10645392
    Abstract: Overlapped block disparity estimation and compensation is described. Compensating for images with overlapped block disparity compensation (OBDC) involves determining if OBDC is enabled in a video bit stream, and determining if OBDC is enabled for one or more macroblocks that neighbor a first macroblock within the video bit stream. The neighboring macroblocks may be transform coded. If OBDC is enabled in the video bit stream and for the one or more neighboring macroblocks, predictions may be made for a region of the first macroblock that has an edge adjacent with the neighboring macroblocks. OBDC can be causally applied. Disparity compensation parameters or modes may be shared amongst views or layers. A variety of predictions may be used with causally-applied OBDC.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: May 5, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexandros Tourapis, Athanasios Leontaris
  • Patent number: 10645403
    Abstract: Methods and systems for adaptive chroma reshaping are discussed. Given an input image, a luma-reshaped image is first generated based on its luma component. For each chroma component of the input image, the range of the pixel values in the luma reshaped image is divided into bins, and for each bin a maximal scale factor is generated based on the chroma pixel values in the input image corresponding to the pixels of the luma reshaped image in the bin. A forward reshaping function is generated based on a reference reshaped function and the maximal scale factors, and reshaped chroma pixel values for the chroma component are generated based on the forward reshaping function and the corresponding pixel values in the luma reshaped image. Implementations options using look-up tables for mobile platforms with limited computational resources are also described.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: May 5, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Qing Song, Guan-Ming Su, Qian Chen, Tao Chen
  • 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
  • Patent number: 10638246
    Abstract: Embodiments of the example embodiment relate to audio object extraction. A method for audio object extraction from audio content is disclosed. The method comprises determining a sub-band object probability for a sub-band of the audio signal in a frame of the audio content, the sub-band object probability indicating a probability of the sub-band of the audio signal containing an audio object. The method further comprises splitting the sub-band of the audio signal into an audio object portion and a residual audio portion based on the determined sub-band object probability. Corresponding system and computer program product are also disclosed.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: April 28, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Lianwu Chen, Lie Lu
  • Patent number: 10638244
    Abstract: A method for performing DRC on a HOA signal comprises transforming the HOA signal to the spatial domain, analyzing the transformed HOA signal, and obtaining, from results of said analyzing, gain factors that are usable for dynamic compression. The gain factors can be transmitted together with the HOA signal. When applying the DRC, the HOA signal is transformed to the spatial domain, the gain factors are extracted and multiplied with the transformed HOA signal in the spatial domain, wherein a gain compensated transformed HOA signal is obtained. The gain compensated transformed HOA signal is transformed back into the HOA domain, wherein a gain compensated HOA signal is obtained. The DRC may be applied in the QMF-filter bank domain.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: April 28, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Johannes Boehm, Florian Keiler
  • 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: 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: 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: 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: 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: 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: 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: 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
  • Patent number: 10629211
    Abstract: Soundfield signals such as e.g. Ambisonics carry a representation of a desired sound field. The Ambisonics format is based on spherical harmonic decomposition of the soundfield, and Higher Order Ambisonics (HOA) uses spherical harmonics of at least 2nd order. However, commonly used loudspeaker setups are irregular and lead to problems in decoder design. A method for improved decoding an audio soundfield representation for audio playback comprises calculating a panning function (W) using a geometrical method based on the positions of a plurality of loudspeakers and a plurality of source directions, calculating a mode matrix (?) from the loudspeaker positions, calculating a pseudo-inverse mode matrix (?+) and decoding the audio soundfield representation. The decoding is based on a decode matrix (D) that is obtained from the panning function (W) and the pseudo-inverse mode matrix (?+).
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: April 21, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Johann-Markus Batke, Florian Keiler, Johannes Boehm
  • Patent number: 10631116
    Abstract: The positions of a plurality of speakers at a media consumption site are determined. Audio information in an object-based format is received. Gain adjustment value for a sound content portion in the object-based format may be determined based on the position of the sound content portion and the positions of the plurality of speakers. Audio information in a ring-based channel format is received. Gain adjustment value for each ring-based channel in a set of ring-based channels may be determined based on the ring to which the ring-based channel belongs and the positions of the speakers at a media consumption site.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: April 21, 2020
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Nicolas R. Tsingos, David S. McGrath, Freddie Sanchez, Antonio Mateos Sole
  • Patent number: 10629212
    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: July 10, 2019
    Date of Patent: April 21, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger, Oliver Wuebbolt
  • 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: 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: 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: 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
  • Patent number: 10623877
    Abstract: Audio signals are received. The audio signals include left and right surround channels. The audio signals are played back using far-field loudspeakers distributed around a space having a plurality of listener positions. The left and right surround channels are played back by a pair of far-field loudspeakers arranged at opposite sides of the space having the plurality of listener positions. An audio component 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 arranged at one of the listener positions. Associated systems, methods and computer program products are provided. Systems, methods and computer program products providing a bitstream comprising the audio signals and the audio component are also provided, as well as a computer-readable medium with data representing such audio content.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: April 14, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Remi Audfray, Nicolas R. Tsingos, Jurgen W. Scharpf
  • Patent number: 10620525
    Abstract: The present invention provides a cinema screen that improves audience perception of brightness at, for example, a premium theater without additional illumination cost. The screen is produced from materials that also help mitigate speckle from laser illumination. The screen has properties and includes structures that may be tuned to the specific capabilities of the projection system, arrangement of the theater, and projector (and angle of projection, angle of viewing). Light reflected from the screen are direct toward audience members and away from walls and ceilings.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: April 14, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Douglas J. Gorny, Martin J. Richards, Timo Kunkel, David Lloyd Schnuelle
  • Patent number: 10621995
    Abstract: When decompressing an HOA data frame representation, a gain control (15, 151) is applied for each channel signal before it is perceptually encoded (16). The gain values are transferred in a differential manner as side information. However, for starting decoding of such streamed compressed HOA data frame representation absolute gain values are required, which should be coded with a minimum number of bits. For determining such lowest integer number (?e) of bits the HOA data frame representation (C(k)) is rendered in spatial domain to virtual loudspeaker signals lying on a unit sphere, followed by normalisation of the HOA data frame representation (C(k)). Then the lowest integer number of bits is set to ?e=?log2(?log2(?{square root over (KMAX)}·O)?+1)?.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: April 14, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger
  • Patent number: 10623685
    Abstract: Dual or multi-modulation display systems comprising a first modulator and a second modulator are disclosed. The first modulator may comprise a plurality of analog mirrors (e.g. MEMS array) and the second modulator may comprise a plurality of mirrors (e.g., DMD array). The display system may further comprise a controller that sends control signals to the first and second modulator. The display system may render highlight features within a projected image by affecting a time multiplexing scheme. In one embodiment, the first modulator may be switched on a sub-frame basis such that a desired proportion of the available light may be focused or directed onto the second modulator to form the highlight feature on a sub-frame rendering basis.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: April 14, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Martin J. Richards
  • Patent number: 10623878
    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. The ambient HOA component is represented by a minimum number of HOA coefficient sequences. The remaining channels contain either directional signals or additional coefficient sequences of the ambient HOA component, depending on what will result in optimum perceptual quality. This processing can change on a frame-by-frame basis.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: April 14, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Alexander Krueger
  • Patent number: 10623860
    Abstract: A method and apparatus for reconstructing N audio channels from M audio channels is disclosed. The method includes receiving a bitstream containing an encoded audio signal representing the M audio channels and decoding the encoded audio signal to obtain a frequency domain representation of the M audio channels. The method further includes extracting a parameter from the bitstream and reconstructing at least one of the N audio channels using the parameter. The parameter represents an angle between two signals, at least one of which is included in the M audio channels.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: April 14, 2020
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Lars Villemoes, Jonas Engdegard, Jonas Roeden, Kristofer Kjoerling
  • Patent number: 10621952
    Abstract: A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: April 14, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Jon Scott Miller, Scott Daly, Mahdi Nezamabadi, Robin Atkins
  • Patent number: 10623854
    Abstract: Input audio data portions of a common time window index value generated by multiple microphones at a location are received. Subband portions are generated from the input audio data portions. Peak powers, noise floors, etc., are individually determined for the subband portions. Weights for the subband portions are computed based on the peak powers, the noise floors, etc., for the subband portions. An integrated audio data portion of the common time window index is generated based on the subband portions and the weight values for the subband portions. An integrated signal may be generated based at least in part on the integrated audio data portion.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: April 14, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Erwin Goesnar, David Gunawan
  • 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
  • Patent number: 10613424
    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: Grant
    Filed: September 27, 2017
    Date of Patent: April 7, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Barret Lippey, Martin J. Richards
  • Patent number: 10614825
    Abstract: An encoding system encodes an N-channel audio signal (X), wherein N?3, as a single-channel downmix signal (Y) together with dry and wet upmix parameters ({tilde over (C)},{tilde over (P)}). In a decoding system, a decorrelating section outputs, based on the downmix signal, an (N?1)-channel decorrelated signal (Z); a dry upmix section maps the downmix signal linearly in accordance with dry upmix coefficients (C) determined based on the dry upmix parameters; a wet upmix section populates an intermediate matrix based on the wet upmix parameters and knowing that the intermediate matrix belongs to a predefined matrix class, obtains wet upmix coefficients (P) by multiplying the intermediate matrix by a predefined matrix, and maps the decorrelated signal linearly in accordance with the wet upmix coefficients; and a combining section combines outputs from the upmix sections to obtain a reconstructed signal ({circumflex over (X)}) corresponding to the signal to be reconstructed.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: April 7, 2020
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Heidi-Maria Lehtonen, Heiko Purnhagen, Toni Hirvonen
  • Patent number: 10614821
    Abstract: The present invention is directed to apparatus and methods for decoding Higher Order Ambisonics (HOA) audio signals. HOA audio signals may be decompressed based on perceptual decoding to determine at least an HOA representation corresponding to the HOA audio signals. A rotated transform may be determined based on a rotation of a spherical sample grid. A rotated HOA representation may be determined based on the rotated transform and the HOA representation. The rotated HOA representation may be rendered to output to a loudspeaker setup.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: April 7, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Johannes Boehm, Sven Kordon, Alexander Krueger, Peter Jax
  • Patent number: 10614819
    Abstract: Encoding/decoding an audio signal having one or more audio components, wherein each audio component is associated with a spatial location. A first audio signal presentation (z) of the audio components, a first set of transform parameters (w(f)), and signal level data (?2) are encoded and transmitted to the decoder. The decoder uses the first set of transform parameters (w(f)) to form a reconstructed simulation input signal intended for an acoustic environment simulation, and applies a signal level modification (?) to the reconstructed simulation input signal. The signal level modification is based on the signal level data (?2) and data (p2) related to the acoustic environment simulation. The attenuated reconstructed simulation input signal is then processed in an acoustic environment simulator. With this process, the decoder does not need to determine the signal level of the simulation input signal, thereby reducing processing load.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: April 7, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Dirk Jeroen Breebaart
  • Patent number: D880453
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: April 7, 2020
    Assignee: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Drew Walcott, Grayson Byrd, Peter Michaelian, Brian Renz, John Stewart, Cody Proksa, Vince Voron, Sripal Mehta, Alan Seefeldt
  • Patent number: RE47935
    Abstract: An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: April 7, 2020
    Assignee: DOLBY INTERNATIONAL AB
    Inventors: Mineo Tsushima, Takeshi Norimatsu, Kosuke Nishio, Naoya Tanaka
  • Patent number: RE47949
    Abstract: An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: April 14, 2020
    Assignee: DOLBY INTERNATIONAL AB
    Inventors: Mineo Tsushima, Takeshi Norimatsu, Kosuke Nishio, Naoya Tanaka
  • Patent number: RE47956
    Abstract: An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: April 21, 2020
    Assignee: DOLBY INTERNATIONAL AB
    Inventors: Mineo Tsushima, Takeshi Norimatsu, Kosuke Nishio, Naoya Tanaka
  • Patent number: D882832
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: April 28, 2020
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Paul Arnulf Frick, Peter Michaelian, Vincent Voron, Matthew William Clare, Pascal Sijen, Douglas J. Gorny, Christopher Roy Kukshtel, Gilbert K. Lee