Dolby Laboratories Patent Applications

Adjusting Spatial Congruency in a Video Conferencing System

Granted: November 9, 2017
Application Number: 20170324931
Example embodiments disclosed herein relate to spatial congruency adjustment. A method for adjusting spatial congruency in a video conference is disclosed. The method includes detecting spatial congruency between a visual scene captured by a video endpoint device and an auditory scene captured by an audio endpoint device that is positioned in relation to the video endpoint device, the spatial congruency being a degree of alignment between the auditory scene and the visual scene,…

High Dynamic Range Display Using LED Backlighting, Stacked Optical Films, and LCD Drive Signals Based on a Low Resolution Light Field Simulation

Granted: November 2, 2017
Application Number: 20170316758
An HDR display is a combination of technologies including, for example, a dual modulation architecture incorporating algorithms for artifact reduction, selection of individual components, and a design process for the display and/or pipeline for preserving the visual dynamic range from capture to display of an image or images. In one embodiment, the dual modulation architecture includes a backlight with an array of RGB LEDs and a combination of a heat sink and thermally conductive vias…

METHODS AND APPARATUS FOR COMPRESSING AND DECOMPRESSING A HIGHER ORDER AMBISONICS REPRESENTATION

Granted: November 2, 2017
Application Number: 20170318406
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…

SINGLE-PASS AND MULTI-PASS-BASED POLYNOMIAL APPROXIMATIONS FOR RESHAPING FUNCTIONS

Granted: October 26, 2017
Application Number: 20170308996
A processor for approximating a reshaping function using a multi-segment polynomial receives an input reshaping function. Given a number of target segments (N) and an initial maximum fitting error, in a first pass, it applies a first smoothing filter to the input reshaping function to generate a first smoothed reshaping function. Next, it generates a first multi-segment polynomial approximation of the input reshaping function based on one or more multi-segment polynomial approximation…

SYSTEM FOR MAINTAINING REVERSIBLE DYNAMIC RANGE CONTROL INFORMATION ASSOCIATED WITH PARAMETRIC AUDIO CODERS

Granted: October 26, 2017
Application Number: 20170309286
On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (?) from the bitstream, where 1?m<n. Also derived from the bitstream are pre-processing dynamic range control, DRC, parameters (DRC2) quantifying an encoder-side dynamic range limiting of the core signal. The n-channel audio signal is obtained by parametric synthesis in accordance with the multichannel coding parameters and while…

ENHANCING THE REPRODUCTION OF MULTIPLE AUDIO CHANNELS

Granted: October 26, 2017
Application Number: 20170311081
This invention relates to the field of multichannel audio. More particularly, the invention relates to a method for the provision of audio channels suitable for application to loudspeakers located above conventional front loudspeakers.

LOUDNESS ADJUSTMENT FOR DOWNMIXED AUDIO CONTENT

Granted: October 26, 2017
Application Number: 20170311107
Audio content coded for a reference speaker configuration is downmixed to downmix audio content coded for a specific speaker configuration. One or more gain adjustments are performed on individual portions of the downmix audio content coded for the specific speaker configuration. Loudness measurements are then performed on the individual portions of the downmix audio content. An audio signal that comprises the audio content coded for the reference speaker configuration and downmix…

HIGH POWER VISIBLE LASER WITH A LASER-FABRICATED NON-LINEAR WAVEGUIDE

Granted: October 12, 2017
Application Number: 20170293202
Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.

Remote Management System for Cinema Exhibition Devices

Granted: October 12, 2017
Application Number: 20170295259
Methods and systems for management of cinema devices are disclosed. The cinema devices can connect to a central node even through a firewall. Once the initial connection is established, updates and commands can be sent and received, both to and from the cinema devices. An operator can connect to the central node to manage the cinema devices.

BACKWARD-COMPATIBLE HDR CODECS WITH TEMPORAL SCALABILITY

Granted: October 12, 2017
Application Number: 20170295382
A processor for video coding receives a full-frame rate (FFR) HDR video signal and a corresponding FFR SDR video signal. An encoder generates a scalable bitstream that allows decoders to generate half-frame-rate (HFR) SDR, FFR SDR, HFR HDR, or FFR HDR signals. Given odd and even frames of the input FFR SDR signal, the scalable bitstream combines a base layer of coded even SDR frames with an enhancement layer of coded packed frames, where each packed frame includes a downscaled odd SDR…

ENTERPRISE THEATER MANAGEMENT SYSTEM

Granted: October 12, 2017
Application Number: 20170295391
Novel methods and systems for providing an enterprise theater management system are disclosed. A remote or cloud-based enterprise theater management system uses a ruleset to uniformly control theater playlist presentation for multiple theaters in either a point of sale controlled or fully autonomous manner, including the sequencing of theater cues with the playlist clips.

EVALUATION OF PERCEPTUAL DELAY IMPACT ON CONVERSATION IN TELECONFERENCING SYSTEM

Granted: October 5, 2017
Application Number: 20170289357
Example embodiments disclosed herein relate to an evaluation of perceptual delay impact on a conversation. A method of evaluating perceptual delay impact on a conversation is disclosed. The method includes detecting a conversational event between a first participant and a second participant, the conversational event including a plurality of speech segments; in response to the conversational event being detected, obtaining at least one conversational parameter for the first and second…

Quantization Control for Variable Bit Depth

Granted: October 5, 2017
Application Number: 20170289546
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…

Chroma Reshaping

Granted: October 5, 2017
Application Number: 20170289555
A first signal in a first color format is received. The first signal is transformed to a second signal in a second color format to be compressed using an encoder. Before encoding, the chroma components of the second signal are reshaped according to the statistical characteristics of the chroma components of the first signal to generate a third signal. In a decoder, an inverse reshaping functions is applied to the chroma components of the decoded signal to generate an approximation of the…

DYNAMIC SUPPRESSION OF NON-LINEAR DISTORTION

Granted: October 5, 2017
Application Number: 20170289682
Systems and methods are described for dynamically suppressing non-linear distortion for a device, such as a speakerphone. A device may receive a signal, where the device has non-linear distortion at a predetermined frequency. The received signal may be analyzed to compute a tone strength parameter and a band level. The received signal may be filtered such that a spectrum of the input signal is dynamically limited by reducing suppression of the non-linear distortion when the tone strength…

AUDIO CHANNEL SPATIAL TRANSLATION

Granted: October 5, 2017
Application Number: 20170289721
M audio input channels, each associated with a spatial direction, are translated to N audio output channels, each associated with a spatial direction, wherein M and N are positive whole integers, M is three or more, and N is three or more, by deriving the N audio output channels from the M audio input channels, wherein one or more of the M audio input channels is associated with a spatial direction other than a spatial direction with which any of the N audio output channels is…

RENDERING AUDIO OBJECTS IN A REPRODUCTION ENVIRONMENT THAT INCLUDES SURROUND AND/OR HEIGHT SPEAKERS

Granted: October 5, 2017
Application Number: 20170289724
During a process, decorrelation may be selectively applied to audio data for an audio object based, at least in part, on whether a speaker for which speaker feed signals will be determined is a surround speaker. In some implementations, decorrelation may be selectively applied according to whether such a speaker is a height speaker. Some implementations may reduce, or even eliminate, audio artifacts such as comb-filter notches and peaks. Some such implementations may increase the size of…

METHOD AND DEVICE FOR RENDERING AN AUDIO SOUNDFIELD REPRESENTATION

Granted: October 5, 2017
Application Number: 20170289725
The invention discloses rendering sound field signals, such as Higher-Order Ambisonics (HOA), for arbitrary loudspeaker setups, where the rendering results in highly improved localization properties and is energy preserving. This is obtained by a new type of decode matrix for sound field data, and a new way to obtain the decode matrix. In a method for rendering an audio sound field representation for arbitrary spatial loudspeaker setups, the decode matrix (D) for the rendering to a given…

Jitter Buffer Apparatus and Method

Granted: September 21, 2017
Application Number: 20170272375
Disclosed is a method and apparatus operative to process packets of media received from a network including a receiver unit operative, a jitter buffer data structure and a playback head defining a point in the jitter buffer data structure from which the ordered queue of packets are to be played back, and at least one prototype head. Each prototype head having a predetermined latency assigned thereto and defining a point in the jitter buffer data structure from which the ordered queue of…

PERCEPTUAL LUMINANCE NONLINEARITY-BASED IMAGE DATA EXCHANGE ACROSS DIFFERENT DISPLAY CAPABILITIES

Granted: September 14, 2017
Application Number: 20170263211
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…