Patents Assigned to Dolby International AB
  • Publication number: 20220246155
    Abstract: Methods and systems for advanced stereo processing of an audio signal are disclosed. The methods and systems include selecting a coding mode of either transform coding or linear predictive coding and performing advanced stereo processing when in the selected coding mode. Both encoding and decoding operations are provided.
    Type: Application
    Filed: April 25, 2022
    Publication date: August 4, 2022
    Applicant: Dolby International AB
    Inventors: Heiko Purnhagen, Pontus Carlsson, Kristofer Kjoerling
  • Patent number: 11405741
    Abstract: A method (900) for rendering audio in a virtual reality rendering environment (180) is described. The method (900) comprises rendering (901) an origin audio signal of an origin audio source (113) of an origin audio scene (111) from an origin source position on a sphere (114) around a listening position (201) of a listener (181). Furthermore, the method (900) comprises determining (902) that the listener (181) moves from the listening position (201) within the origin audio scene (111) to a listening position (202) within a different destination audio scene (112). In addition, the method (900) comprises applying (903) a fade-out gain to the origin audio signal to determine a modified origin audio signal, and rendering (903) the modified origin audio signal of the origin audio source (113) from the origin source position on the sphere (114) around the listening position (201, 202).
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: August 2, 2022
    Assignee: Dolby International AB
    Inventors: Leon Terentiv, Christof Fersch, Daniel Fischer
  • Publication number: 20220230644
    Abstract: Described herein is a method for generating a modified bitstream on a source device, wherein the method includes the steps of: a) receiving, by a receiver, a bitstream including coded media data; b) generating, by an embedder, payload of additional media data and embedding the payload in the bitstream for obtaining, as an output from the embedder, a modified bitstream including the coded media data and the payload of the additional media data; and d) outputting the modified bitstream to a sink device. Described is further a method for processing said modified bitstream on a sink device. Described are moreover a respective source device and sink device as well as a system of a source device and a sink device and respective computer program products.
    Type: Application
    Filed: August 13, 2020
    Publication date: July 21, 2022
    Applicants: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Christof FERSCH, Daniel FISCHER, Leon TERENTIV, Gregory John MCGARRY
  • Patent number: 11388425
    Abstract: A system for decoding a video bitstream includes receiving a frame of the video that includes at least one slice and at least one tile and where each of the at least one slice and the at least one tile are not all aligned with one another.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: July 12, 2022
    Assignee: Dolby International AB
    Inventor: Sachin G. Deshpande
  • Publication number: 20220217311
    Abstract: A novel high efficiency image projection system includes a beam-steering modulator, an amplitude modulator, and a controller. In a particular embodiment the controller generates beam-steering drive values from image data and uses the beam-steering drive values to drive the beam-steering modulator. Additionally, the controller utilizes the beam-steering drive values to generate a lightfield simulation of a lightfield projected onto the amplitude modulator by the beam-steering modulator. The controller utilizes the lightfield simulation to generate amplitude drive values for driving the amplitude modulator in order to project a high quality version of the image described by the image data.
    Type: Application
    Filed: January 10, 2022
    Publication date: July 7, 2022
    Applicants: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL AB
    Inventors: Juan P. PERTIERRA, Martin J. RICHARDS, Christopher John ORLICK, Clement LE BARBENCHON, Angelo M. PIRES ARRIFANO
  • Patent number: 11380336
    Abstract: Encoding and decoding devices for encoding the channels of an audio system having at least four channels are disclosed. The decoding device has a first stereo decoding component which subjects a first pair of input channels to a first stereo decoding, and a second stereo decoding component which subjects a second pair of input channels to a second stereo decoding. The results of the first and second stereo decoding components are crosswise coupled to a third and a fourth stereo decoding component which each performs stereo decoding on one channel resulting from the first stereo decoding component, and one channel resulting from the second stereo decoding component.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: July 5, 2022
    Assignee: Dolby International AB
    Inventors: Kristofer Kjoerling, Harald Mundt, Heiko Purnhagen
  • Patent number: 11373660
    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: Grant
    Filed: July 1, 2020
    Date of Patent: June 28, 2022
    Assignee: Dolby International AB
    Inventors: Sven Kordon, Alexander Krueger
  • Patent number: 11373661
    Abstract: The present document relates to a method of layered encoding of a frame of a compressed higher-order Ambisonics, HOA, representation of a sound or sound field. The compressed HOA representation comprises a plurality of transport signals. The method comprises assigning the plurality of transport signals to a plurality of hierarchical layers, the plurality of layers including a base layer and one or more hierarchical enhancement layers, generating, for each layer, a respective HOA extension payload including side information for parametrically enhancing a reconstructed HOA representation obtainable from the transport signals assigned to the respective layer and any layers lower than the respective layer, assigning the generated HOA extension payloads to their respective layers, and signaling the generated HOA extension payloads in an output bitstream.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: June 28, 2022
    Assignee: Dolby International AB
    Inventors: Sven Kordon, Alexander Krueger
  • Patent number: 11375332
    Abstract: Described is a method of processing position information indicative of an object position of an audio object, wherein the object position is usable for rendering of the audio object, that comprises: obtaining listener orientation information indicative of an orientation of a listener's head; obtaining listener displacement information indicative of a displacement of the listener's head; determining the object position from the position information; modifying the object position based on the listener displacement information by applying a translation to the object position; and further modifying the modified object position based on the listener orientation information. Further described is a corresponding apparatus for processing position information indicative of an object position of an audio object, wherein the object position is usable for rendering of the audio object.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: June 28, 2022
    Assignee: Dolby International AB
    Inventors: Christof Fersch, Leon Terentiv, Daniel Fischer
  • Publication number: 20220199101
    Abstract: Dialogue enhancement of an audio signal, comprising obtaining a set of time-varying parameters configured to estimate a dialogue component present in said audio signal, estimating the dialogue component from the audio signal, applying a compressor only to the estimated dialogue component, to generate a processed dialogue component, applying a user-determined gain to the processed dialogue component, to provide an enhanced dialogue component. The processing of the estimated dialogue may be performed on the decoder side or encoder side. The invention enables an improved dialogue enhancement.
    Type: Application
    Filed: April 15, 2020
    Publication date: June 23, 2022
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Stanislaw Gorlow, Leif Jonas Samuelsson, Holger Hoerich, Tobias Friedrich
  • Patent number: 11367455
    Abstract: Embodiments relate to an audio processing unit that includes a buffer, bitstream payload deformatter, and a decoding subsystem. The buffer stores at least one block of an encoded audio bitstream. The block includes a fill element that begins with an identifier followed by fill data. The fill data includes at least one flag identifying whether enhanced spectral band replication (eSBR) processing is to be performed on audio content of the block. A corresponding method for decoding an encoded audio bitstream is also provided.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: June 21, 2022
    Assignee: Dolby International AB
    Inventors: Lars Villemoes, Heiko Purnhagen, Per Ekstrand
  • Patent number: 11368747
    Abstract: Methods for generating an AV bitstream (e.g., an MPEG-2 transport stream or bitstream segment having adaptive streaming format) such that the AV bitstream includes at least one video I-frame synchronized with at least one audio I-frame, e.g., including by re-authoring at least one video or audio frame (as a re-authored I-frame or a re-authored P-frame). Typically, a segment of content of the AV bitstream which includes the re-authored frame starts with an I-frame and includes at least one subsequent P-frame. Other aspects are methods for adapting such an AV bitstream, audio/video processing units configured to perform any embodiment of the inventive method, and audio/video processing units which include a buffer memory which stores at least one segment of an AV bitstream generated in accordance with any embodiment of the inventive method.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: June 21, 2022
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Michael Donald Hoffmann, Christof Fersch, Marvin Pribadi, Holger Hoerich
  • Patent number: 11368745
    Abstract: A method of playing out media from a media engine run on a receiving apparatus, the method comprising: at the receiving apparatus, receiving a media data structure comprising audio or video content formatted in a plurality of layers, including at least a first layer comprising the audio or video content encoded according to an audio or video encoding scheme respectively, and a second layer encapsulating the encoded content in one or more media containers according to a media container format; determining that at least one of the media containers further encapsulates runnable code for processing at least some of the formatting of the media data structure in order to support playout of the audio or video content by the media engine; running the code on a code engine of the receiving apparatus in order to perform the processing of the media data structure for input to the media engine.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: June 21, 2022
    Assignee: Dolby International AB
    Inventors: Christof Fersch, Wolfgang A. Schildbach
  • Publication number: 20220189493
    Abstract: There is provided encoding and decoding methods for encoding and decoding of object based audio. An exemplary encoding method includes inter alia calculating M downmix signals by forming combinations of N audio objects, wherein M?N, and calculating parameters which allow reconstruction of a set of audio objects formed on basis of the N audio objects from the M downmix signals. The calculation of the M downmix signals is made according to a criterion which is independent of any loudspeaker configuration.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 16, 2022
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Heiko PURNHAGEN, Kristofer KJOERLING, Toni HIRVONEN, Lars VILLEMOES, Dirk Jeroen BREEBAART
  • Patent number: 11363314
    Abstract: Methods, systems, and computer program products for network-based processing and distribution of multimedia content of a live performance are disclosed. In some implementations, recording devices can be configured to record a multimedia event (e.g., a musical performance). The recording devices can provide the recordings to a server while the event is ongoing. The server automatically synchronizes, mixes and masters the recordings. The server performs the automatic mixing and mastering using reference audio data previously captured during a rehearsal. The server streams the mastered recording to multiple end users through the Internet or other public or private network. The streaming can be live streaming.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: June 14, 2022
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Philip Nicol, Antonio Mateos Sole, Giulio Cengarle, Cristina Michel Vasco
  • Publication number: 20220182775
    Abstract: Decoding of Ambisonics representations for a stereo loudspeaker setup is known for first-order Ambisonics audio signals. But such first-order Ambisonics approaches have either high negative side lobes or poor localisation in the frontal region. The invention deals with the processing for stereo decoders for higher-order Ambisonics HOA.
    Type: Application
    Filed: November 8, 2021
    Publication date: June 9, 2022
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Johannes Boehm, Florian Keiler
  • Publication number: 20220180877
    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: December 23, 2021
    Publication date: June 9, 2022
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Sven KORDON, Alexander Krueger
  • Publication number: 20220180876
    Abstract: The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The upmixing can be suspended responsive to control data.
    Type: Application
    Filed: December 23, 2021
    Publication date: June 9, 2022
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Heiko Purnhagen, Pontus Carlsson, Lars Villemoes
  • Publication number: 20220180880
    Abstract: A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequency reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag.
    Type: Application
    Filed: February 22, 2022
    Publication date: June 9, 2022
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Kristofer KJOERLING, Lars VILLEMOES, Heiko PURNHAGEN, Per EKSTRAND
  • Publication number: 20220180878
    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: February 24, 2022
    Publication date: June 9, 2022
    Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL AB
    Inventors: Sripal S. MEHTA, Thomas ZIEGLER, Giles BAKER, Jeffrey RIEDMILLER, Prinyar SAUNGSOMBOON