Dolby Laboratories Patent Grants

Signal reshaping for high dynamic range signals

Granted: February 20, 2024
Patent Number: 11910025
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…

Orientation-aware surround sound playback

Granted: February 13, 2024
Patent Number: 11902762
Example embodiments disclosed herein relate to orientation-aware surround sound playback. A method for processing audio on an electronic device that includes a plurality of loudspeakers is disclosed, the loudspeakers arranged in more than one dimension of the electronic device. The method includes, responsive to receipt of a plurality of received audio streams, generating a rendering component associated with the plurality of received audio streams, determining an orientation dependent…

Orientation-aware surround sound playback

Granted: February 13, 2024
Patent Number: 11902762
Example embodiments disclosed herein relate to orientation-aware surround sound playback. A method for processing audio on an electronic device that includes a plurality of loudspeakers is disclosed, the loudspeakers arranged in more than one dimension of the electronic device. The method includes, responsive to receipt of a plurality of received audio streams, generating a rendering component associated with the plurality of received audio streams, determining an orientation dependent…

Enabling sampling rate diversity in a voice communication system

Granted: February 6, 2024
Patent Number: 11894005
An audio communication endpoint receives a bitstream containing spectral components representing spectral content of an audio signal, wherein the spectral components relate to a first range extending up to a first break frequency, above which any spectral components are unassigned. The endpoint adapts the received bitstream in accordance with a second range extending up to a second break frequency by removing spectral components or adding neutral-valued spectral components relating to a…

Method and apparatus for screen related adaptation of a Higher-Order Ambisonics audio signal

Granted: February 6, 2024
Patent Number: 11895482
A method for generating loudspeaker signals associated with a target screen size is disclosed. The method includes receiving a bit stream containing encoded higher order ambisonics signals, the encoded higher order ambisonics signals describing a sound field associated with a production screen size. The method further includes decoding the encoded higher order ambisonics signals to obtain a first set of decoded higher order ambisonics signals representing dominant components of the sound…

Steering of binauralization of audio

Granted: February 6, 2024
Patent Number: 11895479
A method for steering binauralization of audio is provided. The method comprises steps of: receiving (410) an audio input signal, calculating (430) a confidence value indicating a likelihood that a current audio frame of the audio input signal comprises binauralized audio; determining (450) a state signal based on the confidence value; determining (460) a steering signal, based on the first confidence value, the state signal and an energy value of the audio frame; and generating (470) an…

Methods and apparatus for compressing and decompressing a higher order ambisonics representation

Granted: February 6, 2024
Patent Number: 11895477
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…

Electro-optical transfer function conversion and signal legalization

Granted: February 6, 2024
Patent Number: 11895416
A device includes an electronic processor configured to define a first set of sample pixels from a set of sample pixels determined from received video data according to a first electro-optical transfer function (EOTF) in a first color representation of a first color space; convert the first set of sample pixels to a second EOTF via a mapping function, producing a second set of sample pixels according to the second EOTF; convert the first and second set of sample pixels from the first…

Media-aware navigation metadata

Granted: February 6, 2024
Patent Number: 11895369
The present disclosure relates to methods and apparatus for processing media content having video content and associated audio content. A method of processing media content having video content and associated audio content comprises the method includes receiving the video content and the associated audio content, analyzing the associated audio content, determining one or more navigation points for enabling navigation of the media content based on the analysis, wherein the one or more…

Compressor target curve to avoid boosting noise

Granted: February 6, 2024
Patent Number: 11894006
The processing of audio signals during playback is provided, so that audio signals that fall below a specified threshold loudness level are processed to avoid making unwanted background noise audible. N-channel audio is received from a playback volume controller/leveler (101). The level of the audio is compared with a threshold level. If the level is greater than the threshold level, the audio is processed with a first amount of gain in accordance with a first dynamic range control (DRC)…

Layered augmented entertainment experiences

Granted: February 6, 2024
Patent Number: 11893700
Spatial information that describes spatial locations of visual objects as in a three-dimensional (3D) image space as represented in one or more multi-view unlayered images is accessed. Based on the spatial information, a cinema image layer and one or more device image layers are generated from the one or more multi-view unlayered images. A multi-layer multi-view video signal comprising the cinema image layer and the device image layers is sent to downstream devices for rendering.

Digital point spread function (DPSF) and dual modulation projection (including lasers) using DPSF

Granted: January 30, 2024
Patent Number: 11889236
A digital PSF for use in a dual modulation display. The invention allows the use of less than optimal point spread (PSF) functions in the optics between the pre-modulator and primary modulator of a dual modulation projection system. This technique uses multiple halftones per frame in the pre-modulator synchronized with a modified bit sequence in the primary modulator to produce a compensation image that reduces the errors produced by the sub-optimal PSF. The invention includes the…

Thermal compensation in image projection

Granted: January 30, 2024
Patent Number: 11889233
A non-transitory computer-readable-medium storing instructions that, when executed by a processor of an image projector, cause the image projector to perform operations including receiving a first image data, determining a thermal state of the image projector based at least in part on a content of the first image data, generating a second image data based on the first image data and the thermal state; emitting light in response to the second image data, and projecting an image onto a…

Perceptual luminance nonlinearity-based image data exchange across different display capabilities

Granted: January 30, 2024
Patent Number: 11887560
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…

Optical switch for single and multiple projectors

Granted: January 30, 2024
Patent Number: 11885975
A projection system and method therefor comprises a first light source configured to emit a first-eye light, wherein the first-eye light includes a first set of wavelengths; a second light source configured to emit a second-eye light, wherein the second-eye light includes a second set of wavelengths; a first projector including first projection optics configured to receive a first input light; and an optical switch configured to be switched between an a first mode and a second mode,…

Large format theater design

Granted: January 30, 2024
Patent Number: 11885147
Theater designs including social media, and theater entrances configured to draw patrons into a main area of the theater including an entrance having a curved wall and curved walkway having a horizon drop-off for display of content related to a motion picture or other feature to be shown in the theater. The content may be interactive or otherwise linked to patrons passing a hallway including the curved wall. Spatialized sound corresponding to the video “moves” with objects in the…

Alias cancelling during audio coding mode transitions

Granted: January 23, 2024
Patent Number: RE49813
An apparatus for processing an audio signal and method thereof are disclosed. The present invention includes receiving, by an audio processing apparatus, an audio signal including a first data of a first block encoded with rectangular coding scheme and a second data of a second block encoded with non-rectangular coding scheme; receiving a compensation signal corresponding to the second block; estimating a prediction of an aliasing part using the first data; and, obtaining a reconstructed…

Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supply

Granted: January 23, 2024
Patent Number: 11882421
An integrated cinema amplifier comprises a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides…

Acoustic reflector for height channel speaker

Granted: January 23, 2024
Patent Number: 11882399
A height channel speaker with an integrated acoustic reflector to reflect sound off of a ceiling down to a listener. The acoustic reflector compensates for thin transducers by creating a virtual image of the real sound source outside the speaker enclosure. The focal point of the acoustic reflector is controlled by modifying the curvature of the reflector surface. The transducer is mounted on an inclined plane to radiate sound in a rear-upward inclined direction. The acoustic reflector is…

Adapting video images for wearable devices

Granted: January 23, 2024
Patent Number: 11882267
A spatial direction of a wearable device that represents an actual viewing direction of the wearable device is determined. The spatial direction of the wearable device is used to select, from a multi-view image comprising single-view images, a set of single-view images. A display image is caused to be rendered on a device display of the wearable device. The display image represents a single-view image as viewed from the actual viewing direction of the wearable device. The display image…