Patents by Inventor Christof FERSCH
Christof FERSCH has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11972769Abstract: Described herein is an audio decoder for decoding a bitstream of encoded audio data, wherein the bitstream of encoded audio data represents a sequence of audio sample values and comprises a plurality of frames, wherein each frame comprises associated encoded audio sample values, the audio decoder comprising: a determiner configured to determine whether a frame of the bitstream of encoded audio data is an immediate playout frame comprising encoded audio sample values associated with a current frame and additional information; and an initializer configured to initialize the decoder if the determiner determines that the frame is an immediate playout frame, wherein initializing the decoder comprises decoding the encoded audio sample values comprised by the additional information before decoding the encoded audio sample values associated with the current frame.Type: GrantFiled: August 20, 2019Date of Patent: April 30, 2024Assignee: Dolby International ABInventors: Christof Fersch, Daniel Fischer
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Patent number: 11967330Abstract: 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 c) 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: GrantFiled: August 13, 2020Date of Patent: April 23, 2024Assignees: DOLBY INTERNATIONAL AB, DOLBY LABORATORIES LICENSING CORPORATIONInventors: Christof Fersch, Daniel Fischer, Leon Terentiv, Gregory John McGarry
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Patent number: 11948585Abstract: 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: GrantFiled: September 6, 2022Date of Patent: April 2, 2024Assignee: Dolby International ABInventors: Christof Fersch, Alexander Stahlmann
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Patent number: 11902769Abstract: The present disclosure relates to a method of processing audio content including directivity information for at least one sound source, the directivity information comprising a first set of first directivity unit vectors representing directivity directions and associated first directivity gains. The disclosure further relates to corresponding methods of encoding and decoding audio content including directivity information for at least one sound source.Type: GrantFiled: June 30, 2020Date of Patent: February 13, 2024Assignee: Dolby International ABInventors: Leon Terentiv, Christof Fersch, Daniel Fischer
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Patent number: 11887608Abstract: Some disclosed methods involve encoding or decoding directional audio data. Some encoding methods may involve receiving a mono audio signal corresponding to an audio object and a representation of a radiation pattern corresponding to the audio object. The radiation pattern may include sound levels corresponding to plurality of sample times, a plurality of frequency bands and a plurality of directions. The methods may involve encoding the mono audio signal and encoding the source radiation pattern to determine radiation pattern metadata. Encoding the radiation pattern may involve determining a spherical harmonic transform of the representation of the radiation pattern and compressing the spherical harmonic transform to obtain encoded radiation pattern metadata.Type: GrantFiled: April 23, 2022Date of Patent: January 30, 2024Assignees: DOLBY INTERNATIONAL ABInventors: Nicolas R. Tsingos, Mark R. P. Thomas, Christof Fersch
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Patent number: 11882426Abstract: 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: GrantFiled: May 12, 2022Date of Patent: January 23, 2024Assignee: Dolby International ABInventors: Christof Fersch, Leon Terentiv, Daniel Fischer
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Patent number: 11877142Abstract: 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: GrantFiled: May 12, 2022Date of Patent: January 16, 2024Assignee: Dolby International ABInventors: Christof Fersch, Leon Terentiv, Daniel Fischer
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Patent number: 11830508Abstract: The disclosure relates to methods, apparatus and systems for side load processing of packetized media streams. In an embodiment, the apparatus comprises: a receiver for receiving a bitstream, and a splitter for identifying a packet type in the bitstream and splitting, based on the identification of a value of the packet type in the bit stream into a main stream and an auxiliary stream.Type: GrantFiled: December 8, 2021Date of Patent: November 28, 2023Assignee: DOLBY INTERNATIONAL ABInventors: Stephan Schreiner, Christof Fersch
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Publication number: 20230362575Abstract: A method (910) for rendering an audio signal in a virtual reality rendering environment (180) is described. The method (910) comprises rendering (911) an origin audio signal of an audio source (311, 312, 313) from an origin source position on an origin sphere (114) around an origin listening position (301) of a listener (181). Furthermore, the method (900) comprises determining (912) that the listener (181) moves from the origin listening position (301) to a destination listening position (302). In addition, the method (900) comprises determining (913) a destination source position of the audio source (311, 312, 313) on a destination sphere (114) around the destination listening position (302) based on the origin source position, and determining (914) a destination audio signal of the audio source (311, 312, 313) based on the origin audio signal.Type: ApplicationFiled: July 13, 2023Publication date: November 9, 2023Applicant: DOLBY INTERNATIONAL ABInventors: Leon TERENTIV, Christof FERSCH, Daniel FISCHER
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Patent number: 11770582Abstract: 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: GrantFiled: May 26, 2022Date of Patent: September 26, 2023Assignees: DOLBY LABORATORIES LICENSING CORPORATION, DOLBY INTERNATIONAL ABInventors: Michael Donald Hoffmann, Christof Fersch, Marvin Pribadi, Holger Hoerich
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Patent number: 11750999Abstract: 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: GrantFiled: July 28, 2022Date of Patent: September 5, 2023Assignee: DOLBY INTERNATIONAL ABInventors: Leon Terentiv, Christof Fersch, Daniel Fischer
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Patent number: 11743672Abstract: A method (910) for rendering an audio signal in a virtual reality rendering environment (180) is described. The method (910) comprises rendering (911) an origin audio signal of an audio source (311, 312, 313) from an origin source position on an origin sphere (114) around an origin listening position (301) of a listener (181). Furthermore, the method (900) comprises determining (912) that the listener (181) moves from the origin listening position (301) to a destination listening position (302). In addition, the method (900) comprises determining (913) a destination source position of the audio source (311, 312, 313) on a destination sphere (114) around the destination listening position (302) based on the origin source position, and determining (914) a destination audio signal of the audio source (311, 312, 313) based on the origin audio signal.Type: GrantFiled: August 30, 2021Date of Patent: August 29, 2023Assignee: DOLBY INTERNATIONAL ABInventors: Leon Terentiv, Christof Fersch, Daniel Fischer
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Publication number: 20230262407Abstract: The present disclosure relates to a method of decoding audio scene content from a bitstream by a decoder that includes an audio renderer with one or more rendering tools.Type: ApplicationFiled: December 22, 2022Publication date: August 17, 2023Applicant: DOLBY INTERNATIONAL ABInventors: Leon TERENTIV, Christof FERSCH, Daniel FISCHER
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Publication number: 20230186928Abstract: Described herein are methods, apparatus and computer products for decoding an encoded MPEG-D USAC bitstream. Described herein are such methods, apparatus and computer products that reduce a computational complexity.Type: ApplicationFiled: May 18, 2021Publication date: June 15, 2023Applicant: Dolby International ABInventors: Michael Franz BEER, Eytan RUBIN, Daniel FISCHER, Christof FERSCH, Markus WERNER
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Publication number: 20230188920Abstract: Described herein is a method of processing audio content for rendering in a three-dimensional audio scene, wherein the audio content comprises a sound source at a source position, the method comprising: obtaining a voxelized representation of the three-dimensional audio scene, wherein the voxelized representation indicates volume elements in which sound can propagate and volume elements by which sound is occluded; generating a two-dimensional projection map for the audio scene based on the voxelized representation by applying a projection operation to the voxelized representation that projects onto a horizontal plane; and determining parameters indicating a virtual source position of a virtual sound source based on the source position, a listener position, and the projection map, to simulate, by rendering a virtual source signal from the virtual source position, an impact of acoustic diffraction by the three-dimensional audio scene on a source signal of the sound source at the source position.Type: ApplicationFiled: March 29, 2021Publication date: June 15, 2023Applicant: Dolby International ABInventors: Leon TERENTIV, Daniel FISCHER, Christof FERSCH, Panji SETIAWAN
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Publication number: 20230065644Abstract: The present disclosure relates to methods, apparatus and systems for encoding an audio signal into a bitstream, in particular at an encoder, comprising: encoding or including audio signal data associated with 3DoF audio rendering into one or more first bitstream parts of the bitstream, and encoding or including metadata associated with 6DoF audio rendering into one or more second bitstream parts of the bitstream. The present disclosure further relates to methods, apparatus and systems for decoding an audio signal and audio rendering based on the bitstream.Type: ApplicationFiled: August 25, 2022Publication date: March 2, 2023Applicant: DOLBY INTERNATIONAL ABInventors: Leon TERENTIV, Christof FERSCH, Daniel FISCHER
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Publication number: 20230022740Abstract: 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: ApplicationFiled: July 28, 2022Publication date: January 26, 2023Applicant: DOLBY INTERNATIONAL ABInventors: Leon Terentiv, Christof Fersch, Daniel Fischer
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Publication number: 20220415332Abstract: 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: ApplicationFiled: September 6, 2022Publication date: December 29, 2022Applicant: Dolby International ABInventors: Christof FERSCH, Alexander STAHLMANN
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Patent number: 11540079Abstract: The present disclosure relates to a method of decoding audio scene content from a bitstream by a decoder that includes an audio renderer with one or more rendering tools.Type: GrantFiled: April 8, 2019Date of Patent: December 27, 2022Assignee: Dolby International ABInventors: Leon Terentiv, Christof Fersch, Daniel Fischer
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Publication number: 20220377484Abstract: The present disclosure relates to a method of processing audio content including directivity information for at least one sound source, the directivity information comprising a first set of first directivity unit vectors representing directivity directions and associated first directivity gains. The disclosure further relates to corresponding methods of encoding and decoding audio content including directivity information for at least one sound source.Type: ApplicationFiled: June 30, 2020Publication date: November 24, 2022Applicant: Dolby International ABInventors: Leon TERENTIV, Christof FERSCH, Daniel FISCHER