Patents Assigned to Dolby Laboratories Licensing Corporation
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Patent number: 11817114Abstract: Some implementations involve receiving a content stream that includes audio data, determining a content type corresponding to the content stream and determining, based at least in part on the content type, a noise compensation method. Some examples involve performing the noise compensation method on the audio data to produce noise-compensated audio data, rendering the noise-compensated audio data for reproduction via a set of audio reproduction transducers of the audio environment, to produce rendered audio signals, and providing the rendered audio signals to at least some audio reproduction transducers of the audio environment.Type: GrantFiled: December 9, 2019Date of Patent: November 14, 2023Assignee: Dolby Laboratories Licensing CorporationInventors: Timothy Alan Port, Daniel Steven Templeton, Jack Gregory Hays
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Patent number: 11818400Abstract: A backward reshaping mapping table is initially generated as an inverse of a forward reshaping mapping table. The backward reshaping mapping table is updated by replacing the content-mapped luminance codewords with forward reshaped luminance codewords generated by applying a luminance forward mapping to the sampled luminance codewords. The luminance forward mapping is constructed from the forward reshaping mapping table. The backward reshaping mapping table and the luminance forward mapping are used to generate backward reshaping mappings for creating a reconstructed image from a forward reshaped image. The forward reshaped image is encoded, in a video signal, along with image metadata specifying the backward reshaping mappings. A recipient device of the video signal applies the backward reshaping mappings to the forward reshaped image to create the reconstructed image of the second dynamic range.Type: GrantFiled: October 16, 2020Date of Patent: November 14, 2023Assignee: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Qing Song, Arun Raj, Guan-Ming Su
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Patent number: 11818372Abstract: Methods and systems for frame rate scalability are described. Support is provided for input and output video sequences with variable frame rate and variable shutter angle across scenes, or for input video sequences with fixed input frame rate and input shutter angle, but allowing a decoder to generate a video output at a different output frame rate and shutter angle than the corresponding input values. Techniques allowing a decoder to decode more computationally-efficiently a specific backward compatible target frame rate and shutter angle among those allowed are also presented.Type: GrantFiled: January 12, 2023Date of Patent: November 14, 2023Assignee: Dolby Laboratories Licensing CorporationInventors: Robin Atkins, Peng Yin, Taoran Lu, Fangjun Pu, Sean Thomas McCarthy, Walter J. Husak, Tao Chen, Guan-Ming Su
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Publication number: 20230360662Abstract: The present invention relates to a method and device for processing a first and a second audio signal representing an input binaural audio signal acquired by a binaural recording device. The present invention further relates to a method for rendering a binaural audio signal on a speaker system. The method for processing a binaural signal comprising extracting audio information from the first audio signal, computing a band gain for reducing noise in the first audio signal and applying the band gains to respective frequency bands of the first audio signal in accordance with a dynamic scaling factor, to provide a first output audio signal. Wherein the dynamic scaling factor has a value between zero and one and is selected so as to reduce quality degradation for the first audio signal.Type: ApplicationFiled: September 15, 2021Publication date: November 9, 2023Applicants: Dolby Laboratories Licensing Corporation, Dolby International ABInventors: Zhiwei Shuang, Yuanxing Ma, Yang Liu, Ziyu Yang, Giulio Cengarle
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Publication number: 20230360659Abstract: A method for representing a second presentation of audio channels or objects as a data stream, the method comprising the steps of: (a) providing a set of base signals, the base signals representing a first presentation of the audio channels or objects; (b) providing a set of transformation parameters, the transformation parameters intended to transform the first presentation into the second presentation; the transformation parameters further being specified for at least two frequency bands and including a set of multi-tap convolution matrix parameters for at least one of the frequency bands.Type: ApplicationFiled: July 13, 2023Publication date: November 9, 2023Applicants: Dolby Laboratories Licensing Corporation, Dolby International ABInventors: Dirk Jeroen Breebaart, David Matthew Cooper, Leif Jonas Samuelsson
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Publication number: 20230359430Abstract: Media input audio data corresponding to a media stream and microphone input audio data from at least one microphone may be received. A first level of at least one of a plurality of frequency bands of the media input audio data, as well as a second level of at least one of a plurality of frequency bands of the microphone input audio data, may be determined. Media output audio data and microphone output audio data may be produced by adjusting levels of one or more of the first and second plurality of frequency bands based on the perceived loudness of the microphone input audio data, of the microphone output audio data, of the media output audio data and the media input audio data. One or more processes may be modified upon receipt of a mode-switching indication.Type: ApplicationFiled: July 12, 2023Publication date: November 9, 2023Applicant: Dolby Laboratories Licensing CorporationInventors: Mark Alexander, Chunjian Li, Joshua Brandon Lando, Alan J. Seefeldt, C. Phillip Brown, Dirk Jeroen Breebaart
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Patent number: 11812020Abstract: 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: GrantFiled: March 15, 2021Date of Patent: November 7, 2023Assignee: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Walter C. Gish, Christopher J. Vogt
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Publication number: 20230353762Abstract: Several embodiments of scalable image processing systems and methods are disclosed herein whereby color management processing of source image data to be displayed on a target display is changed according to varying levels of metadata.Type: ApplicationFiled: July 7, 2023Publication date: November 2, 2023Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Neil W. Messmer, Robin Atkins, Steve Margerm, Peter W. Longhurst
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Publication number: 20230353970Abstract: Diffuse or spatially large audio objects may be identified for special processing. A decorrelation process may be performed on audio signals corresponding to the large audio objects to produce decorrelated large audio object audio signals. These decorrelated large audio object audio signals may be associated with object locations, which may be stationary or time-varying locations. For example, the decorrelated large audio object audio signals may be rendered to virtual or actual speaker locations. The output of such a rendering process may be input to a scene simplification process. The decorrelation, associating and/or scene simplification processes may be performed prior to a process of encoding the audio data.Type: ApplicationFiled: July 10, 2023Publication date: November 2, 2023Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL ABInventors: Dirk Jeroen BREEBAART, Lie LU, Nicolas R. TSINGOS, Antonio MATEOS SOLE
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Patent number: 11805379Abstract: The present invention is directed to methods and apparatus for translating a first plurality of audio input channels to a second plurality of audio output channels. This includes determining that there is pair-wise coding among any of the first plurality of audio input channels, determining an input/output-mapping matrix for mapping at least a first set of the first plurality of audio input channels to at least a second set of the second plurality of audio output channels; and deriving the second plurality of audio output channels based on first plurality of audio input channels, the input/output-mapping matrix and the determined pair-wise coding. The first plurality of audio input channels represent the same soundfield represented by the second plurality of audio output channels.Type: GrantFiled: July 8, 2022Date of Patent: October 31, 2023Assignee: Dolby Laboratories Licensing CorporationInventor: Mark F. Davis
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Patent number: 11803948Abstract: Methods and systems for the display management of HDR video signals are presented. The mapping is based on tone mapping and color volume mapping which map an input signal with an input dynamic range and color volume to a target display with a target dynamic range and color volume. Both a global tone-mapping and precision-mapping methods using pyramid filtering are presented.Type: GrantFiled: April 16, 2020Date of Patent: October 31, 2023Assignee: Dolby Laboratories Licensing CorporationInventors: Robin Atkins, Jaclyn Anne Pytlarz, Elizabeth G. Pieri
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Patent number: 11803351Abstract: A communication system, method, and computer-readable medium therefor comprise a media server configured to receive a plurality of audio streams from a corresponding plurality of client devices, the media server including circuitry configured to rank the plurality of audio streams based on a predetermined metric, group a first portion of the plurality of audio streams into a first set, the first portion of the plurality of audio streams being the N highest-ranked audio streams, group a second portion of the plurality of audio streams into a second set, the second portion of the plurality of audio streams being the M lowest-ranked audio streams, forward respective audio streams of the first set to a receiver device, and discard respective audio streams of the second set, wherein N and M are independent integers.Type: GrantFiled: April 3, 2020Date of Patent: October 31, 2023Assignee: Dolby Laboratories Licensing CorporationInventors: Glenn N. Dickins, Feng Deng, Michael Eckert, Craig Johnston, Paul Holmberg
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Publication number: 20230343347Abstract: 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: ApplicationFiled: April 20, 2023Publication date: October 26, 2023Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL ABInventors: Jeffrey RIEDMILLER, Harald MUNDT, Michael SCHUG, Martin WOLTERS
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Publication number: 20230345055Abstract: In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized. HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.Type: ApplicationFiled: June 27, 2023Publication date: October 26, 2023Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Robin Atkins, Peng Yin, Taoran Lu, Jaclyn Anne Pytlarz
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Publication number: 20230344970Abstract: A projection system and calibration method therefore relate to a light source configured to emit a light in response to an image data, an optical system configured to project the light emitted by the light source; receiving an input associated with a plurality of light values corresponding to a plurality of primary lightfields; converting the input associated with the plurality of light values to a plurality of projector primary color values; determining a gain map based on the plurality Values of projector primary color values; applying the gain map to an image to perform a chromaticity uniformity correction by adjusting levels of the plurality of primary lightfields so that a primary mixture is the same over an image frame, and projecting the image with the optical system in the image frame, wherein the second image is corrected by the gain map.Type: ApplicationFiled: January 28, 2021Publication date: October 26, 2023Applicant: Dolby Laboratories Licensing CorporationInventor: Jerome D. Shields
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Publication number: 20230343100Abstract: In a cloud-based system for encoding high dynamic range (HDR) video, each node receives a video segment and bumper frames. Each segment is subdivided into primary scenes and secondary scenes to derive scene-based forward reshaping functions that minimize the amount of reshaping-related metadata when coding the video segment, while maintaining temporal continuity among scenes processed by multiple nodes. Methods to generate scene-based forward and backward reshaping functions to optimize video coding and improve the coding efficiency of reshaping-related metadata are also examined.Type: ApplicationFiled: September 17, 2021Publication date: October 26, 2023Applicant: Dolby Laboratories Licensing CorporationInventors: Harshad Kadu, Guan-Ming Su, Neeraj J. Gadgil, Tsung-Wei Huang
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Publication number: 20230345192Abstract: Methods for dialogue enhancing audio content, comprising providing a first audio signal presentation of the audio components, providing a second audio signal presentation, receiving a set of dialogue estimation parameters configured to enable estimation of dialogue components from the first audio signal presentation, applying said set of dialogue estimation parameters to said first audio signal presentation, to form a dialogue presentation of the dialogue components; and combining the dialogue presentation with said second audio signal presentation to form a dialogue enhanced audio signal presentation for reproduction on the second audio reproduction system, wherein at least one of said first and second audio signal presentation is a binaural audio signal presentation.Type: ApplicationFiled: April 28, 2023Publication date: October 26, 2023Applicants: Dolby Laboratories Licensing Corporation, DOLBY INTERNATIONAL ABInventors: Leif Jonas Samuelsson, Dirk Jeroen Breebaart, David Matthew Cooper, Jeroen Koppens
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Publication number: 20230341754Abstract: A novel spatial light modulator (SLM) includes a cover glass, and modulation layer, and a plurality of pixel minors, and separates unwanted, reflected light from desired, modulated light. In one embodiment, a geometrical relationship exists between the cover glass and the pixel minors, such that light that reflects from the cover glass is separated from light that reflects from the pixel minors and is transmitted from the SLM. In one example, one of the cover glass or the pixel minors is angled with respect to the modulation layer. In another example embodiment, the cover glass has a particular thickness, which introduces destructive interference between light that reflects from the top and bottom surfaces of the cover glass. In another embodiment antireflective coatings are disposed between optical interfaces of the SLM. In another embodiment, light from the SLM is directed through an optical filter to remove unwanted light.Type: ApplicationFiled: June 30, 2023Publication date: October 26, 2023Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Juan P. PERTIERRA, Martin J. RICHARDS, Barret LIPPEY
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Patent number: D1004572Type: GrantFiled: July 19, 2021Date of Patent: November 14, 2023Assignee: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Drew Alexander Walcott, Grayson H. Byrd, Peter Michaelian, Brian Edward Renz, John Carson Stewart, Cody Michael Proksa, Vincent Voron, Sripal S. Mehta, Alan J. Seefeldt
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Patent number: D1004573Type: GrantFiled: July 19, 2021Date of Patent: November 14, 2023Assignee: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Drew Alexander Walcott, Grayson H. Byrd, Peter Michaelian, Brian Edward Renz, John Carson Stewart, Cody Michael Proksa, Vincent Voron, Sripal S. Mehta, Alan J. Seefeldt