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Dolby Laboratories Licensing Corporation patents


Recent patent applications related to Dolby Laboratories Licensing Corporation. Dolby Laboratories Licensing Corporation is listed as an Agent/Assignee. Note: Dolby Laboratories Licensing Corporation may have other listings under different names/spellings. We're not affiliated with Dolby Laboratories Licensing Corporation, we're just tracking patents.

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Scheduling playback of audio in a virtual acoustic space

A method for processing audio data, the method comprising: receiving audio data corresponding to a plurality of instances of audio, including at least one of: (a) audio data from multiple endpoints, recorded separately or (b) audio data from a single endpoint corresponding to multiple talkers and including spatial information for each of the multiple talkers; rendering the audio data in a virtual acoustic space such that each of the instances of audio has a respective different virtual position in the virtual acoustic space; and scheduling the instances of audio to be played back with a playback overlap between at least two of the instances of audio, wherein the scheduling is performed, at least in part, according to a set of perceptually-motivated rules.. . ... Dolby Laboratories Licensing Corporation

Multiple color channel multiple regression predictor

Inter-color image prediction is based on multi-channel multiple regression (mmr) models. Image prediction is applied to the efficient coding of images and video signals of high dynamic range. ... Dolby Laboratories Licensing Corporation

Temperature-compensated led-backlit liquid crystal displays

A display system with temperature compensation includes (a) a backlight unit containing a light emitting diode (led) array, (b) a liquid crystal display (lcd) containing a plurality of pixels for spatially modulating, according to respective lcd drive values of the pixels, transmission of light generated by the led array, (c) a plurality of temperature probes mounted to the backlight unit for measuring a respective plurality of temperatures at the led array, (d) a light-field simulator for simulating, at least in part based upon the temperatures, a light field at the lcd as generated by the led array, and (e) an lcd drive solver for processing a target image and the light field simulated by the light-field simulator, to determine the lcd drive values required to display the target image as compensated for temperatures of the led array.. . ... Dolby Laboratories Licensing Corporation

Detecting and mitigating audio-visual incongruence

Systems and methods are described for detecting and remedying potential incongruence in a video conference. A camera of a video conferencing system may capture video images of a conference room. ... Dolby Laboratories Licensing Corporation

Methods and systems for interactive rendering of object based audio

Methods for generating an object based audio program which is renderable in a personalizable manner, e.g., to provide an immersive, perception of audio content of the program. Other embodiments include steps of delivering (e.g., broadcasting), decoding, and/or rendering such a program. ... Dolby Laboratories Licensing Corporation

Audio stick for controlling wireless speakers

A system and method of providing a signal to wireless speakers. An audio stick connects to a source device and provides the audio signal to the wireless speakers. ... Dolby Laboratories Licensing Corporation

2d lut color transforms with reduced memory footprint

Methods and systems for color transforms are disclosed. A memory footprint of look up tables for color transforms can be reduced by separating the look up tables into factors, applying frequency domain transforms, dividing the look up tables into zones, or establishing hierarchical levels with increasing resolution. ... Dolby Laboratories Licensing Corporation

Filter coefficient updating in time domain filtering

Example embodiments disclosed herein relate to filter coefficient updating in time domain filtering. A method of processing an audio signal is disclosed. ... Dolby Laboratories Licensing Corporation

Audio processing in adaptive intermediate spatial format

Systems, methods, and computer program products of audio processing based on adaptive intermediate spatial format (aisf) are described. The aisf is an extension to isf that allows spatial resolution around an isf ring to be adjusted dynamically with respect to content of incoming audio objects. ... Dolby Laboratories Licensing Corporation

Upward firing loudspeaker having asymmetric dispersion for reflected sound rendering

A soundbar speaker for transmitting reflected sound waves off an upper surface down to a listening environment, comprising: a cabinet containing a plurality of audio drivers, direct-firing drivers within the cabinet oriented to transmit sound along a horizontal axis substantially perpendicular to a front surface of the cabinet, and a pair of upward-firing slotted drivers placed proximate to ends of an top surface of the cabinet and oriented at an inclination angle relative to the horizontal axis. The slotted drivers are configured to create an overlapping reflected sound projection for high frequency sound when reflected down to a listening position located at a distance in front of the speaker pair. ... Dolby Laboratories Licensing Corporation

Separating audio sources

Example embodiments disclosed herein relate to source separation in audio content. A method for separating sources from audio content is disclosed, the audio content being of a multi-channel format based on a plurality of channels. ... Dolby Laboratories Licensing Corporation

Method and apparatus for improving the coding of side information required for coding a higher order ambisonics representation of a sound field

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. ... Dolby Laboratories Licensing Corporation

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

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. ... Dolby Laboratories Licensing Corporation

Methods, apparatus and systems for decompressing a higher order ambisonics (hoa) signal

. . A method for compressing a hoa signal being an input hoa representation with input time frames (c(k)) of hoa coefficient sequences comprises spatial hoa encoding of the input time frames and subsequent perceptual encoding and source encoding. Each input time frame is decomposed (802) into a frame of predominant sound signals (xps(k−1)) and a frame of an ambient hoa component ({tilde over (c)}amb(k−1)). ... Dolby Laboratories Licensing Corporation

08/16/18 / #20180234704

Signal reshaping for high dynamic range signals

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. ... Dolby Laboratories Licensing Corporation

08/16/18 / #20180234612

Audio capture for aerial devices

Methods, systems, and computer program products for automatically positioning a content capturing device are disclosed. A vehicle, e.g., an uav, carries the content capturing device, e.g., a camcorder. ... Dolby Laboratories Licensing Corporation

08/16/18 / #20180234069

Volume-levelling processing

A method in a computing device configured to perform volume-levelling processing on input audio data by at least applying one or more filters to the input audio data, the computing device being configured to obtain an estimated difference between a target output loudness level and a loudness level associated with the input audio data, and to adapt the filter coefficients of the one or more filters based on the estimated difference. The method involves starting, or stopping, the volume-levelling processing. ... Dolby Laboratories Licensing Corporation

08/16/18 / #20180234065

System and method for leveling loudness variation in an audio signal

Systems and methods for leveling loudness variation in an audio signal are described. Embodiments use both a perceptual leveling algorithm and a standards-based loudness measure together to minimize audio process artifacts and ensure that the measured loudness of the processed audio is close to a required measure, according to a particular standard measurement of loudness. ... Dolby Laboratories Licensing Corporation

08/09/18 / #20180227691

Processing object-based audio signals

Example embodiments disclosed herein relate to audio signal processing. The audio signal has multiple audio objects. ... Dolby Laboratories Licensing Corporation

08/02/18 / #20180220248

Method and apparatus for compressing and decompressing a higher order ambisonics signal representation

A method and apparatus for decompressing a higher order ambisonics (hoa) signal representation is disclosed. The apparatus includes an input interface that receives an encoded directional signal and an encoded ambient signal and an audio decoder that perceptually decodes the encoded directional signal and encoded ambient signal to produce a decoded directional signal and a decoded ambient signal, respectively. ... Dolby Laboratories Licensing Corporation

08/02/18 / #20180220144

Video coding and delivery with both spatial and dynamic range scalability

In a method to code and transmit scalable hdr video signals, hdr signals are processed and encoded in the ipt-pq color space to generate a base layer at reduced spatial resolution and/or dynamic range, and an enhancement layer with a residual signal. A signal reshaping block before the base layer encoder allows for improved coding of hdr signals using a reduced bit depth. ... Dolby Laboratories Licensing Corporation

08/02/18 / #20180218749

Audio discontinuity detection and correction

Methods for detecting whether a rendered version of a specified seamless connection (“ssc”) at a connection point between two audio segment sequences results in an audible discontinuity, and methods for analyzing at least one ssc between audio segment sequences to determine whether a renderable version of each ssc would have an audible discontinuity at the connection point when rendered, and in appropriate cases, for a ssc having a renderable version which is determined to have an audible discontinuity when rendered, correcting at least one audio segment of at least one segment sequence to be connected in accordance with the ssc in an effort to ensure that rendering of the ssc will result in seamless connection without an audible discontinuity. Other aspects are editing systems configured to implement any of the methods, and storage media and rendering systems which store audio data generated in accordance with any of the methods.. ... Dolby Laboratories Licensing Corporation

08/02/18 / #20180217485

Single and multi-modulator projector systems with global dimming

Projector display systems comprising a light dimmer and first modulator are disclosed. The light dimmer may comprise an adjustable iris, adjustable light sources and/or lcd stack that is capable of lowering the luminance of the light source illuminated the first modulator. ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180213256

Coding and decoding of interleaved image data

Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3d video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180213246

Tiling in video encoding and decoding

Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180213235

Rate control for video splicing applications

Rate control techniques are provided for encoding an input video sequence into a compressed coded bitstream with multiple coding passes. The final coding pass may comprise final splices with non-overlapping frames that do not extend into neighboring final splices. ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180211682

Processing high-definition audio data

In an apparatus configured to perform signal processing on audio data of a first sampling rate, methods disclosed herein comprise receiving audio data of a second sampling rate, the second sampling rate being higher than the first sampling rate. The methods comprise applying filtering to the audio data of the second sampling rate to thereby produce first filtered audio data and second filtered audio data, the first filtered audio data comprising mainly component frequencies which are audible to the human ear, the second filtered audio data comprising mainly components frequencies which are substantially inaudible to the human ear. ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180211440

Surround ambient light sensing, processing and adjustment

Directional image sensor data may be acquired with one or more directional image sensors. A light source and illumination image may be generated based on the directional image sensor data. ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180210695

Binaural rendering for headphones using metadata processing

Embodiments are described for a method of rendering audio for playback through headphones comprising receiving digital audio content, receiving binaural rendering metadata generated by an authoring tool processing the received digital audio content, receiving playback metadata generated by a playback device, and combining the binaural rendering metadata and playback metadata to optimize playback of the digital audio content through the headphones.. . ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180210220

System for 3d image projections and viewing

Shaped glasses have curved surface lenses with spectrally complementary filters disposed thereon. The filters curved surface lenses are configured to compensate for wavelength shifts occurring due to viewing angles and other sources. ... Dolby Laboratories Licensing Corporation

07/26/18 / #20180210217

Glasses for spectral and 3d imaging

3d glasses include an absorptive layer in a single lens of the glasses. The absorptive layer may be specifically tailored for spectral separation characteristics of a 3d filter portion of the lens. ... Dolby Laboratories Licensing Corporation

07/19/18 / #20180206051

Method and device for rendering an audio soundfield representation

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. ... Dolby Laboratories Licensing Corporation

07/19/18 / #20180204581

Methods, apparatus and systems for determining reconstructed audio signal

According to an aspect of the present invention, a method for reconstructing an audio signal having a baseband portion and a highband portion is disclosed. The method includes obtaining a decoded baseband audio signal by decoding an encoded audio signal and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. ... Dolby Laboratories Licensing Corporation

07/12/18 / #20180199130

Time heuristic audio control

A time heuristic audio control system, comprises a receiver for receiving time-based data from a personal computing device and a memory storing one or more sets processing parameters comprising instructions for processing the ambient sound based upon the time-based data. The system further includes a processor coupled to the memory and the receiver configured to adjust the ambient sound as directed by a selected set of processing parameters retrieved from the memory to create adjusted audio, the selected set of processing parameters retrieved based upon the time-based data and at least one speaker for outputting the adjusted audio.. ... Dolby Laboratories Licensing Corporation

07/12/18 / #20180199036

Method and system for generating a transform size syntax element for video decoding

In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. ... Dolby Laboratories Licensing Corporation

07/12/18 / #20180197562

Companding system and method to reduce quantization noise using advanced spectral extension

Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. ... Dolby Laboratories Licensing Corporation

07/12/18 / #20180197561

Companding system and method to reduce quantization noise using advanced spectral extension

Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. ... Dolby Laboratories Licensing Corporation

07/05/18 / #20180192230

System and method for adaptive audio signal generation, coding and rendering

Embodiments are described for an adaptive audio system that processes audio data comprising a number of independent monophonic audio streams. One or more of the streams has associated with it metadata that specifies whether the stream is a channel-based or object-based stream. ... Dolby Laboratories Licensing Corporation

07/05/18 / #20180192186

Determining azimuth and elevation angles from stereo recordings

Input audio data, including first microphone audio signals and second microphone audio signals output by a pair of coincident, vertically-stacked directional microphones, may be received. An azimuthal angle corresponding to a sound source location may be determined, based at least in part on an intensity difference between the first microphone audio signals and the second microphone audio signals. ... Dolby Laboratories Licensing Corporation

07/05/18 / #20180192062

Hardware efficient sparse fir filtering in layered video coding

In a decoder, a processor extracts a control map of false contour filtering from a part of a multi-layer video signal that includes a low dynamic range image mapped from an original high-dynamic range (hdr) image. It determines one or more filter parameters for a sparse finite-impulse-response (fir) filter, where the one or more filter parameters relate to at least in part on the control map of false contour filtering and a predicted image predicted from the low dynamic range image. ... Dolby Laboratories Licensing Corporation

07/05/18 / #20180191912

Selective conference digest

Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations disclosed herein involve receiving audio data corresponding to a recording of at least one conference involving a plurality of conference participants. ... Dolby Laboratories Licensing Corporation

07/05/18 / #20180190266

Conference word cloud

Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations disclosed herein involve receiving speech recognition results data, including a plurality of speech recognition lattices and a word recognition confidence score for each of a plurality of hypothesized words of the speech recognition lattices, for a conference recording. ... Dolby Laboratories Licensing Corporation

07/05/18 / #20180190215

Locally dimmed quantum dot display

Dual modulator displays are disclosed incorporating a phosphorescent plate interposed in the optical path between a light source modulation layer and a display modulation layer. Spatially modulated light output from the light source modulation layer impinges on the phosphorescent plate and excites corresponding regions of the phosphorescent plate which in turn emit light having different spectral characteristics than the light output from the light source modulation layer. ... Dolby Laboratories Licensing Corporation

06/28/18 / #20180184224

Audio panning transformation system and method

A method of creating a multichannel audio signal by: determining an expected series of audio emission source locations around an expected listener location; determining a surface around the expected listener location, the surface including the expected series of audio emission source locations; mapping an audio object location into a surface energy component having a surface energy location and magnitude and an expected listener location energy component having an expected listeners location energy location and magnitude; panning an audio object signal for the surface energy component to surrounding expected audio emission sources to produce a first set of surface panned audio emission signals; panning the audio object signal for the expected listeners location energy location to surrounding expected audio emission sources to produce a second set of expected listeners location panned audio emission signals; combining the first and second set of panned audio signals to produce the multichannel audio signal.. . ... Dolby Laboratories Licensing Corporation

06/28/18 / #20180182352

Method and apparatus for image data transformation

Image data is transformed for display on a target display. A sigmoidal transfer function provides a free parameter controlling min-tone contrast. ... Dolby Laboratories Licensing Corporation

06/28/18 / #20180182310

Rapid estimation of effective illuminance patterns for projected light fields

Apparatus and methods are provided that employ one or more of a variety of techniques for reducing the time required to display high resolution images on a high dynamic range display having a light source layer and a display layer. In one technique, the image resolution is reduced, an effective luminance pattern is determined for the reduced resolution image, and the resolution of the effective luminance pattern is then increased to the resolution of the—display layer. ... Dolby Laboratories Licensing Corporation

06/28/18 / #20180181880

Training signal processing model for component replacement in signal processing system

Embodiments of training signal processing models for component replacement in signal processing systems are disclosed. A device for training a third signal processing model via a machine learning method include a first calculating unit, a second calculating unit and a training unit. ... Dolby Laboratories Licensing Corporation

06/21/18 / #20180176682

Sub-band mixing of multiple microphones

Input audio data portions of a common time window index value generated by multiple microphones at a location are received. Subband portions are generated from the input audio data portions. ... Dolby Laboratories Licensing Corporation

06/21/18 / #20180176535

View direction based multilevel low bandwidth techniques to support individual user experiences of omnidirectional video

View direction data of the viewer is collected in real time while the viewer is viewing a first reconstructed omnidirectional image. The view direction data is sent to the video streaming server to cause generating image layers from an omnidirectional image in reference to a view direction of the viewer. ... Dolby Laboratories Licensing Corporation

06/21/18 / #20180174777

Mechanical structure for button on satellite microphone

An apparatus may include: a stationary module; a movable module having an outer surface and a substrate; a tactile switch secured on a first side of the substrate; a light indicator secured on a second side of the substrate, the first side and the second side being opposing sides of the substrate, etc. The movable module is configured to generate a spatial displacement relative to the stationary module along a spatial direction in response to a physical force exerted on the outer surface along the spatial direction.. ... Dolby Laboratories Licensing Corporation

06/21/18 / #20180174534

Global light compensation in a variety of displays

A non-uniform illumination pattern is determined with a display panel of a display device. The non-uniform illumination pattern comprises different values of the one or more illumination properties in first and second spatial regions of the display panel. ... Dolby Laboratories Licensing Corporation

06/21/18 / #20180174532

Techniques for dual modulation display with light conversion

Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. ... Dolby Laboratories Licensing Corporation

06/21/18 / #20180172502

Estimation of reverberant energy component from active audio source

Example embodiments disclosed herein relate to a estimation of reverberant energy components from audio sources. A method of estimating a reverberant energy component from an active audio source (100) is disclosed. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180167637

Signal reshaping and coding for hdr and wide color gamut signals

In a method to improve the coding efficiency of high-dynamic range (hdr) images, a decoder parses sequence processing set (sps) data from an input coded bitstream to detect that an hdr extension syntax structure is present in the parsed sps data. It extracts from the hdr extension syntax structure post-processing information that includes one or more of a color space enabled flag, a color enhancement enabled flag, an adaptive reshaping enabled flag, a dynamic range conversion flag, a color correction enabled flag, or an sdr viewable flag. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180167616

Quantization control for variable bit depth

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. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180167581

Multimodal spatial registration of devices for congruent multimedia communications

Systems and methods are described for determining orientation of an external audio device in a video conference, which may be used to provide congruent multimodal representation for a video conference. A camera of a video conferencing system may be used to detect a potential location of an external audio device within a room in which the video conferencing system is providing a video conference. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180167515

Audio signal processing based on remote user control

Example embodiments disclosed herein relate to audio signal processing based on remote user control. A method of processing an audio signal in an audio sender device is disclosed. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180166084

Method for determining for the compression and decompression of an hoa data frame representation

When decompressing an hoa data frame representation, a gain control (15, 151) is applied for each channel signal before it is perceptually encoded (16). The gain values are transferred in a differential manner as side information. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180165796

Filtering and edge encoding and decoding for depth maps

Several implementations relate, for example, to depth encoding and/or filtering for 3d video (3dv) coding formats. A sparse dyadic mode (308) for partitioning macroblocks (mbs) along edges in a depth map is provided as well as techniques for trilateral (or bilateral) filtering of depth maps that may include adaptive selection between filters sensitive to changes in video intensity and/or changes in depth. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180164665

Light recycling for projectors with high dynamic range

Projection systems and/or methods for efficient use of light by recycling a portion of the light energy are disclosed. In one embodiment, a projection display system is disclosed comprising a light source; an integrated rod that receives light from said light source at a proximal end that comprise a reflective surface which may reflecting/recycle light down said integrating rod; and a modulator comprising at least one moveable mirror that reflects light received from the integrating rod in either a projection direction or a light recycling direction. ... Dolby Laboratories Licensing Corporation

06/14/18 / #20180164602

Moveably-coupled screen actuators

A speckle damping system for dampening speckle on a projection screen for a projection display system employing coherent or partially coherent light sources (e.g., lasers, leds) are disclosed. In one embodiment, a rotatably coupled system is disclosed, comprising: a set of actuators; a set of rotatably coupled mounts, each of said set of rotatably coupled mount capable of mounting at least one said actuator; and wherein said at least one actuator mounted on said rotatably coupled mount is in moveable mechanical communication with said projection screen. ... Dolby Laboratories Licensing Corporation

06/07/18 / #20180160089

Transformation of dynamic metadata to support alternate tone rendering

An existing metadata set that is specific to a color volume transformation model is transformed to a metadata set that is specific to a distinctly different color volume transformation model. For example, source content metadata for a first color volume transformation model is received. ... Dolby Laboratories Licensing Corporation

06/07/18 / #20180157149

Quasi-phase-matched frequency doubling of broadband light with uncorrelated spectral phase

A device for quasi-phase-matched frequency doubling of broadband light with uncorrelated spectral phase includes a nonlinear optical material, which in turn includes a domain-reversed grating organized in a series of sections along propagation direction of the broadband light through the nonlinear optical material. Each of the sections is characterized by a respective period of the domain-reversed grating. ... Dolby Laboratories Licensing Corporation

06/07/18 / #20180157054

Method and system for shaped glasses and viewing 3d images

Shaped glasses have curved surface lenses and spectrally complementary filters disposed on the curved surface lenses configured to compensate for wavelength shifts occurring due to viewing angles and other sources. The spectrally complementary filters include guard bands to prevent crosstalk between spectrally complementary portions of a 3d image viewed through the shaped glasses. ... Dolby Laboratories Licensing Corporation

06/07/18 / #20180155944

Social media linked large format theater design

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. ... Dolby Laboratories Licensing Corporation

05/31/18 / #20180152803

Processing object-based audio signals

An audio processing system and method which calculates, based on spatial metadata of the audio object, a panning coefficient for each of the audio objects in relation to each of a plurality of predefined channel coverage zones. Converts the audio signal into submixes in relation to the predefined channel coverage zones based on the calculated panning coefficients and the audio objects. ... Dolby Laboratories Licensing Corporation

05/31/18 / #20180152719

Tiling in video encoding and decoding

Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). ... Dolby Laboratories Licensing Corporation

05/31/18 / #20180152678

Multiple stage modulation projector display systems having efficient light utilization

Dual or multi-modulation display systems comprising a first modulator and a second modulator are disclosed. The first modulator may comprise a plurality of analog mirrors (e.g. ... Dolby Laboratories Licensing Corporation

05/31/18 / #20180152166

Techniques for distortion reducing multi-band compressor with timbre preservation

Distortion reducing multi-band compressor with timbre preservation is provided. Timbre preservation is achieved by determining a time-varying threshold in each of a plurality frequency bands as a function of a respective fixed threshold for the frequency band and, at least in part, an audio signal level and a fixed threshold outside such frequency band. ... Dolby Laboratories Licensing Corporation

05/31/18 / #20180151188

Audio encoder and decoder with program loudness and boundary metadata

Apparatus and methods for generating an encoded audio bitstream, including by including program loudness metadata and audio data in the bitstream, and optionally also program boundary metadata in at least one segment (e.g., frame) of the bitstream. Other aspects are apparatus and methods for decoding such a bitstream, e.g., including by performing adaptive loudness processing of the audio data of an audio program indicated by the bitstream, or authentication and/or validation of metadata and/or audio data of such an audio program. ... Dolby Laboratories Licensing Corporation

05/31/18 / #20180151170

Combined active noise cancellation and noise compensation in headphone

The disclosure relates to combined active noise cancellation and noise compensation in a headphone. An audio processing device includes a selector and a noise compensation unit. ... Dolby Laboratories Licensing Corporation

05/24/18 / #20180146315

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

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. ... Dolby Laboratories Licensing Corporation

05/24/18 / #20180146198

Predicting and verifying regions of interest selections

Video images are rendered in viewports of content viewers. Each content viewer views video images through a respective viewport in the viewports. ... Dolby Laboratories Licensing Corporation

05/24/18 / #20180146185

Compatible stereoscopic video delivery

Stereoscopic images are subsampled and placed in a “checkerboard” pattern in an image. The image is encoded in a monoscopic video format. ... Dolby Laboratories Licensing Corporation

05/24/18 / #20180146176

Thermal compensation in image projection

Apparatus for controlling a spatial light modulator (106) of an image projector (100), the image projector further comprising an illumination source (102) arranged to illuminate the spatial light modulator (106), the apparatus comprising an input (126) for receiving image data, an output for outputting image data and a controller (110) in communication with the input and the output, the controller (110) being configured to: •determine an estimated thermal state of the projector; •use at least the estimated thermal state of the projector to obtain an expected illumination pattern of light incident on the spatial light modulator (106) when illuminated by the illumination source (102); •use the expected illumination pattern to adjust the received image data so as to compensate for thermal changes in one or more components of the image projector; and •output the adjusted image data to the spatial light modulator (106).. . ... Dolby Laboratories Licensing Corporation

05/24/18 / #20180144759

Audio source separation with source direction determination based on iterative weighting

Example embodiments disclosed herein relate to audio source separation with source direction determined based on iterative weighted component analysis. A method of separating audio sources in audio content is disclosed. ... Dolby Laboratories Licensing Corporation

05/24/18 / #20180144692

Metadata filtering for display mapping for high dynamic range images

Systems and methods are disclosed for filtering metadata to be used in display management. Given an input video stream and input metadata comprising at least one of minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the input metadata are filtered using a temporal filter to generate filtered metadata, wherein the filtering is based only on metadata for input frames in the same scene. ... Dolby Laboratories Licensing Corporation

05/17/18 / #20180139566

Augmented hearing system

Some implementations may involve receiving, via an interface system, personnel location data indicating a location of at least one person and receiving, from an orientation system, headset orientation data corresponding with the orientation of a headset. First environmental element location data, indicating a location of at least a first environmental element, may be determined. ... Dolby Laboratories Licensing Corporation

05/17/18 / #20180139537

Separated audio analysis and processing

Example embodiments disclosed herein relate to separated audio analysis and processing. A system for processing an audio signal is disclosed. ... Dolby Laboratories Licensing Corporation

05/10/18 / #20180132038

Intrinsically safe audio system management for conference rooms

Systems and methods are described for analyzing and resolving feedback caused by having multiple audio links in a conference room. An audio system may detect the presence of duplicated audio caused by multiple audio links in the conference room. ... Dolby Laboratories Licensing Corporation

05/10/18 / #20180131966

Method and system for generating a transform size syntax element for video decoding

In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. ... Dolby Laboratories Licensing Corporation

05/10/18 / #20180131938

Signal reshaping and coding in the ipt-pq color space

In a method to improve the coding efficiency of high-dynamic range images coded in a perceptually quantized ipt color space (ipt-pq), the values of the chroma components (p/t) of an input signal in ipt-pq color space are divided by a factor of two before being encoded with standard-based encoders, such as avc or hevc; thus better matching the covariance characteristics of ycbcr signals. In addition, the order of the p and t chroma components may be swapped and the sign of the t chroma component may be inverted. ... Dolby Laboratories Licensing Corporation

05/10/18 / #20180130479

Enabling sampling rate diversity in a voice communication system

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 moving spectral components or adding neutral-valued spectral components relating to a range between the first and second break frequencies. ... Dolby Laboratories Licensing Corporation

05/10/18 / #20180130188

Image highlight detection and rendering

A highlight mask is generated for an image to identify one or more highlights in the image. One or more highlight classifiers are determined for the one or more highlights in the image. ... Dolby Laboratories Licensing Corporation

05/03/18 / #20180124399

In-loop block-based image reshaping in high dynamic range video coding

Systems and methods are disclosed for in-loop, region-based, reshaping for the coding of high-dynamic range video. Using a high bit-depth buffer to store input data and previously decoded reference data, forward and backward, in-loop, reshaping functions allow video coding and decoding to be performed at a target bit depth lower than the input bit depth. ... Dolby Laboratories Licensing Corporation

05/03/18 / #20180122384

Audio encoding and rendering with discontinuity compensation

Methods for generating encoded audio programs indicative of n channels of discontinuity-corrected, encoded audio content, including by applying discontinuity correction values to multi-channel audio content, and for rendering such a program (e.g., to generate a discontinuity-corrected m-channel mix of content indicated by the program). Other aspects are systems or devices (e.g., encoders or decoders, or rendering systems) configured to implement any of the methods.. ... Dolby Laboratories Licensing Corporation

05/03/18 / #20180120573

Eyewear devices with focus tunable lenses

An eyewear device comprises a left lens assembly and a right lens assembly. The left lens assembly includes a left focus tunable lens and a left focus fixed lens. ... Dolby Laboratories Licensing Corporation

04/19/18 / #20180109895

Generation and playback of near-field audio content

Audio signals (201) are received. The audio signals include left and right surround channels (206). ... Dolby Laboratories Licensing Corporation

04/19/18 / #20180109894

Techniques for localized perceptual audio

Audio perception in local proximity to visual cues is provided. A device includes a video display, first row of audio transducers, and second row of audio transducers. ... Dolby Laboratories Licensing Corporation

04/19/18 / #20180109874

User experience oriented audio signal processing

Example embodiments disclosed herein relate to user experience oriented audio signal processing. There is provided a method for user experience oriented audio signal processing. ... Dolby Laboratories Licensing Corporation

04/19/18 / #20180108367

Decoding of encoded audio bitstream with metadata container located in reserved data space

Apparatus and methods for generating an encoded audio bitstream, including by including program loudness metadata and audio data in the bitstream, and optionally also program boundary metadata in at least one segment (e.g., frame) of the bitstream. Other aspects are apparatus and methods for decoding such a bitstream, e.g., including by performing adaptive loudness processing of the audio data of an audio program indicated by the bitstream, or authentication and/or validation of metadata and/or audio data of such an audio program. ... Dolby Laboratories Licensing Corporation

04/19/18 / #20180108362

Methods and apparatus for decompressing a compressed hoa signal

A method for compressing a hoa signal being an input hoa representation with input time frames (c(k)) of hoa coefficient sequences comprises spatial hoa encoding of the input time frames and subsequent perceptual encoding and source encoding. Each input time frame is decomposed (802) into a frame of predominant sound signals (xps(k−1)) and a frame of an ambient hoa component ({tilde over (c)}amb(k−1)). ... Dolby Laboratories Licensing Corporation

04/12/18 / #20180103333

Audio object extraction with sub-band object probability estimation

Embodiments of the example embodiment relate to audio object extraction. A method for audio object extraction from audio content is disclosed. ... Dolby Laboratories Licensing Corporation

04/12/18 / #20180103253

Adaptive chroma quantization in video coding for multiple color imaging formats

Methods to improve the quality of coding high-dynamic range (hdr) signals are presented. Instead of using a single chroma quantization table for all color formats, a video encoder may adaptively use separate tables for each one, and transmit the table's id to a decoder. ... Dolby Laboratories Licensing Corporation

04/05/18 / #20180098094

Inverse luma/chroma mappings with histogram transfer and approximation

An sdr cdf is constructed based on an sdr histogram generated from a distribution of sdr codewords in sdr images. An hdr cdf is constructed based on an hdr histogram generated from a distribution of hdr codewords in hdr images that correspond to the sdr images. ... Dolby Laboratories Licensing Corporation

04/05/18 / #20180098046

Targeted display color volume specification via color remapping information (cri) messaging

Given existing color remapping information (cri) messaging variables, methods are described to communicate color volume information for a targeted display to a downstream receiver. Bits 7:0 of the 32-bit colour_remap_id are used to extract a first value. ... Dolby Laboratories Licensing Corporation

03/29/18 / #20180091803

Projection display providing additional modulation and related methods

A projection display system includes a spatial modulator that is controlled to compensate for flare in a lens of the projector. The spatial modulator increases achievable intra-frame contrast and facilitates increased peak luminance without unacceptable black levels. ... Dolby Laboratories Licensing Corporation

03/22/18 / #20180084278

Coding and decoding of interleaved image data

Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3d video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. ... Dolby Laboratories Licensing Corporation

03/22/18 / #20180084255

Predictive motion vector coding

Overlapped block disparity estimation and compensation is described. Compensating for images with overlapped block disparity compensation (obdc) involves determining if obdc is enabled in a video bit stream, and determining if obdc is enabled for one or more macroblocks that neighbor a first macroblock within the video bit stream. ... Dolby Laboratories Licensing Corporation

03/22/18 / #20180082658

Metamerically stable rgbw display

Methods for designing metamerically stable rgbw displays are presented. Display parameters are selected so that given a reference spectral power distribution (spd) for the white color primary (e.g., one based on d65), and a test spectral power distribution for the white color primary, deviations in color appearance measurements between the two spds among n different observers are minimized. ... Dolby Laboratories Licensing Corporation

03/22/18 / #20180082429

Dynamic adjustment of frame rate conversion settings

Motion characteristics related to the images are determined. A motion characteristics metadata portion is generated based on the motion characteristics, and is to be used for determining an optimal frc operational mode with a downstream device for the images. ... Dolby Laboratories Licensing Corporation

03/15/18 / #20180077515

System and tools for enhanced 3d audio authoring and rendering

Improved tools for authoring and rendering audio reproduction data are provided. Some such authoring tools allow audio reproduction data to be generalized for a wide variety of reproduction environments. ... Dolby Laboratories Licensing Corporation

03/15/18 / #20180077511

System for rendering and playback of object based audio in various listening environments

Embodiments are described for a system of rendering object-based audio content through a system that includes individually addressable drivers, including at least one driver that is configured to project sound waves toward one or more surfaces within a listening environment for reflection to a listening area within the listening environment; a renderer configured to receive and process audio streams and one or more metadata sets associated with each of the audio streams and specifying a playback location of a respective audio stream; and a playback system coupled to the renderer and configured to render the audio streams to a plurality of audio feeds corresponding to the array of audio drivers in accordance with the one or more metadata sets.. . ... Dolby Laboratories Licensing Corporation

03/15/18 / #20180077510

Method for and apparatus for decoding an ambisonics audio soundfield representation for audio playback using 2d setups

Sound scenes in 3d can be synthesized or captured as a natural sound field. For decoding, a decode matrix is required that is specific for a given loudspeaker setup and is generated using the known loudspeaker positions. ... Dolby Laboratories Licensing Corporation

03/15/18 / #20180077491

Distributed amplification for adaptive audio rendering systems

Embodiments are described for a hybrid amplification architecture that separates individual audio amplifier stages from the power supply and a simple two- or three-conductor bus that transmits both power and audio signal to a plurality of daisy-chained speakers to playback adaptive audio content in an expanded surround-sound environment including surround and overhead speakers or for use within professional live sound applications and/or distributed audio systems. A control unit generates digital audio and power and transmits both simultaneously over the bus to individual speaker units associated with each speaker. ... Dolby Laboratories Licensing Corporation

03/15/18 / #20180075862

Adaptive audio filtering

In an audio processing system (300), a filtering section (350, 400): receives subband signals (410, 420, 430) corresponding to audio content of a reference signal (301) in respective frequency subbands; receives subband signals (411, 421, 431) corresponding to audio content of a response signal (304) in the respective subbands; and forms filtered inband references (412, 422, 432) by applying respective filters (413, 423, 433) to the subband signals of the reference signal. For a frequency subband: filtered crossband references (424, 425) are formed by multiplying, by scalar factors (426, 427), filtered inband references of other subbands; a composite filtered reference (428) is formed by summing the filtered inband reference of the subband (422) and the filtered crossband references; a residual signal (429) is computed as a difference between the composite filtered reference and the subband signal of the response signal corresponding to the subband; and the scalar factors and the filter applied to the subband signal of the reference signal corresponding to the subband are adjusted based on the residual signal.. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180070081

Adaptive filtering based upon boundary strength

An image decoding apparatus that includes a motion compensation prediction circuit configured to conduct motion compensation prediction for each of blocks to be decoded by using the reconstructed image, an inverse transformation circuit configured to conduct inverse orthogonal transformation for the data of the blocks to be decoded, and a determination circuit configured to determine a filtering strength and whether or not to conduct filtering, with respect to each of the boundaries. In addition, the determining circuit is configured to determine filtering is conducted when at least one of the two adjacent blocks is intra-coded, and filtering is not conducted when both of the two adjacent blocks are not intra-coded, a non-zero transformation coefficient is not coded in both of the two adjacent blocks, the two adjacent blocks are predicted by the same reference frame, and an absolute value of a difference between motion vectors of the two adjacent blocks is smaller than a specified threshold value.. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180070080

Adaptive filtering based upon boundary strength

An image decoding apparatus that includes a motion compensation prediction circuit configured to conduct motion compensation prediction for each of blocks to be decoded by using the reconstructed image, an inverse transformation circuit configured to conduct inverse orthogonal transformation for the data of the blocks to be decoded, and a determination circuit configured to determine a filtering strength and whether or not to conduct filtering, with respect to each of the boundaries. In addition, the determining circuit is configured to determine filtering is conducted when at least one of the two adjacent blocks is intra-coded, and filtering is not conducted when both of the two adjacent blocks are not intra-coded, a non-zero transformation coefficient is not coded in both of the two adjacent blocks, the two adjacent blocks are predicted by the same reference frame, and an absolute value of a difference between motion vectors of the two adjacent blocks is smaller than a specified threshold value.. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180070071

Compatible stereoscopic video delivery

Stereoscopic images are subsampled and placed in a “checkerboard” pattern in an image. The image is encoded in a monoscopic video format. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180070064

Systems and methods for light field modeling techniques for multi-modulation displays

Dual and multi-modulator projector display systems and techniques are disclosed. In one embodiment, a projector display system comprises a light source; a controller, a first modulator, receiving light from the light source and rendering a halftone image of said the input image; a blurring optical system that blurs said halftone image with a point spread function (psf); and a second modulator receiving the blurred halftone image and rendering a pulse width modulated image which may be projected to form the desired screen image. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180069517

Audio control using auditory event detection

In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180068670

Apparatuses and methods for audio classifying and processing

Apparatus and methods for audio classifying and processing are disclosed. In one embodiment, an audio processing apparatus includes an audio classifier for classifying an audio signal into at least one audio type in real time; an audio improving device for improving experience of audience; and an adjusting unit for adjusting at least one parameter of the audio improving device in a continuous manner based on the confidence value of the at least one audio type.. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180068666

Adaptive processing with multiple media processing nodes

Techniques for adaptive processing of media data based on separate data specifying a state of the media data are provided. A device in a media processing chain may determine whether a type of media processing has already been performed on an input version of media data. ... Dolby Laboratories Licensing Corporation

03/08/18 / #20180068637

Dynamic power management for an hdr display

An input media signal encoded with a portion of image data to be rendered with a target display device is received. It is determined, based on the portion of image data, whether a first power profile is to be applied to rendering the portion of image data with the target display device. ... Dolby Laboratories Licensing Corporation

03/01/18 / #20180063482

Automatic video framing of conference participants

Systems and methods are described for automatically framing participants in a video conference using a single camera of a video conferencing system. A camera of a video conferencing system may capture video images of a conference room. ... Dolby Laboratories Licensing Corporation

02/22/18 / #20180054689

Video content assisted audio object extraction

Embodiments of the present invention relate to video content assisted audio object extraction. A method of audio object extraction from channel-based audio content is disclosed. ... Dolby Laboratories Licensing Corporation

02/22/18 / #20180054688

Personal audio lifestyle analytics and behavior modification feedback

Some disclosed implementations include an interface system and a control system. The control system may be capable of receiving, via the interface system, microphone data. ... Dolby Laboratories Licensing Corporation

02/15/18 / #20180048974

Method and apparatus for generating from a coefficientdomain representation of hoa signals a mixed spatial/coefficient domain representation of said hoa signals

There are two representations for higher order ambisonics denoted hoa: spatial domain and coefficient domain. The invention generates from a coefficient domain representation a mixed spatial/coefficient domain representation, wherein the number of said hoa signals can be variable. ... Dolby Laboratories Licensing Corporation

02/15/18 / #20180048904

Tiling in video encoding and decoding

Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). ... Dolby Laboratories Licensing Corporation

02/15/18 / #20180048768

Nearby talker obscuring, duplicate dialogue amelioration and automatic muting of acoustically proximate participants

In an audio conferencing environment, including multiple users participating by means of a series of associated audio input devices for the provision of audio input, and a series of audio output devices for the output of audio output streams to the multiple users, with the audio input and output devices being interconnected to a mixing control server for the control and mixing of the audio inputs from each audio input devices to present a series of audio streams to the audio output devices, a method of reducing the effects of cross talk pickup of at least a first audio conversation by multiple audio input devices, the method including the steps of: (a) monitoring the series of audio input devices for the presence of a duplicate audio conversation input from at least two input audio sources in an audio output stream; and (b) where a duplicate audio conversation input is detected, suppressing the presence of the duplicate audio conversation input in the audio output stream.. . ... Dolby Laboratories Licensing Corporation

02/15/18 / #20180048683

Private communications in virtual meetings

Apparatus comprising an interface for receiving a respective uplink data stream from each of three or more further apparatuses, and for transmitting a respective downlink data stream to each of the further apparatuses; and a logic system in communication with the interface. The logic system is configured: to receive first data in the uplink data stream received from a first one of the further apparatuses; and in a first mode, to include at least some of the first data in the respective downlink data streams transmitted to every other one of the further apparatuses, or, in a second mode, to include at least some of the first data in the downlink data stream transmitted to a second one of the further apparatuses and to omit or attenuate substantially all of the first data in the downlink data stream transmitted to at least a third one of the further apparatuses. ... Dolby Laboratories Licensing Corporation

02/08/18 / #20180041759

Content-adaptive perceptual quantizer for high dynamic range images

A content-adaptive quantizer processor receives an input image with an input bit depth. A noise-mask generation process is applied to the input image to generate a noise mask image which characterizes each pixel in the input image in terms of its perceptual relevance in masking quantization noise. ... Dolby Laboratories Licensing Corporation

02/08/18 / #20180041639

State-based endpoint conference interaction

Systems and methods are described for modifying one of far-end signal playback and capture of local audio on an audio device. Frames of both a far-end audio stream and a near-end audio stream may be analyzed using a measure of voice activity, the analyzing producing voice data associated with each frame. ... Dolby Laboratories Licensing Corporation

02/08/18 / #20180040336

Blind bandwidth extension using k-means and a support vector machine

A system and method of blind bandwidth extension. The system selects a prediction model from a number of stored prediction models that were generated using an unsupervised clustering method (e.g., a k-means method) and a supervised regression process (e.g., a support vector machine), and extends the bandwidth of an input musical audio signal.. ... Dolby Laboratories Licensing Corporation

02/08/18 / #20180039169

Projection displays

A locally dimmed display has a spatial light modulator illuminated by a light source. The spatial light modulator is illuminated with a low resolution version of a desired image. ... Dolby Laboratories Licensing Corporation

02/01/18 / #20180035233

Reverberation generation for headphone virtualization

The present disclosure relates to reverberation generation for headphone virtualization. A method of generating one or more components of a binaural room impulse response (brir) for headphone virtualization is described. ... Dolby Laboratories Licensing Corporation

02/01/18 / #20180034429

System and method for leveling loudness variation in an audio signal

Systems and methods for leveling loudness variation in an audio signal are described. Embodiments use both a perceptual leveling algorithm and a standards-based loudness measure together to minimize audio process artifacts and ensure that the measured loudness of the processed audio is close to a required measure, according to a particular standard measurement of loudness. ... Dolby Laboratories Licensing Corporation

02/01/18 / #20180033453

Voice activity detector for audio signals

According to one aspect, a method for detecting voice activity is disclosed, the method including receiving a frame of an input audio signal, the input audio signal having an sample rate; dividing the frame into a plurality of subbands based on the sample rate, the plurality of subbands including at least a lowest subband and a highest subband; filtering the lowest subband with a moving average filter to reduce an energy of the lowest subband; estimating a noise level for each of the plurality of subbands; calculating a signal to noise ratio value for each of the plurality of subbands; and determining a speech activity level of the frame based on an average of the calculated signal to noise ratio values and a weighted average of an energy of each of the plurality of subbands. Other aspects include audio decoders that decode audio that was encoded using the methods described herein.. ... Dolby Laboratories Licensing Corporation

02/01/18 / #20180031921

Techniques for dual modulation with light conversion

Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. ... Dolby Laboratories Licensing Corporation

01/25/18 / #20180027352

System and method for adaptive audio signal generation, coding and rendering

Embodiments are described for an adaptive audio system that processes audio data comprising a number of independent monophonic audio streams. One or more of the streams has associated with it metadata that specifies whether the stream is a channel-based or object-based stream. ... Dolby Laboratories Licensing Corporation

01/25/18 / #20180027351

Optimized virtual scene layout for spatial meeting playback

Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations involve receiving or determining conversational dynamics data. ... Dolby Laboratories Licensing Corporation

01/25/18 / #20180027245

Speedup techniques for rate distortion optimized quantization

Techniques for selecting a coding mode for an image coding process are described. Coding modes can be selected through a coding mode transition state machine, a re-quantization process, selection of an optimal transform size, by skipping some quantization parameters, or by performing motion search.. ... Dolby Laboratories Licensing Corporation

01/25/18 / #20180027123

Conference searching and playback of search results

Various disclosed implementations involve processing and/or playback of a recording of a conference involving a plurality of conference participants. Some implementations disclosed herein involve receiving audio data corresponding to a recording of at least one conference involving a plurality of conference participants. ... Dolby Laboratories Licensing Corporation

01/25/18 / #20180025464

Transformation of dynamic metadata to support alternate tone rendering

An existing metadata set that is specific to a color volume transformation model is transformed to a metadata set that is specific to a distinctly different color volume transformation model. For example, source content metadata for a first color volume transformation model is received. ... Dolby Laboratories Licensing Corporation

01/25/18 / #20180024429

High contrast discrete input prism for image projectors

Prism assemblies for projector display systems disclosed receive inputs from discrete color channels (e.g., red, green and blue channels. In one embodiment, “off state” light from the red, green, and blue dlp modulation may be reflected away from on-state light paths within the prism, tending to avoid uncontrolled scatter. ... Dolby Laboratories Licensing Corporation

01/18/18 / #20180020310

Audio processing apparatus with channel remapper and object renderer

Embodiments are described for rendering spatial audio content through a system that is configured to reflect audio off of one or more surfaces of a listening environment. The system includes an array of audio drivers distributed around a room, wherein at least one driver of the array of drivers is configured to project sound waves toward one or more surfaces of the listening environment for reflection to a listening area within the listening environment and a renderer configured to receive and process audio streams and one or more metadata sets that are associated with each of the audio streams and that specify a playback location in the listening environment.. ... Dolby Laboratories Licensing Corporation

01/18/18 / #20180020226

Predictive image encoding and decoding with pixel group based quantization

The present invention relates generally to images. More particularly, an embodiment of the present invention relates to the pixel group segmented quantization and de-quantization of the residual signal in layered coding of high dynamic range images. ... Dolby Laboratories Licensing Corporation

01/18/18 / #20180020224

Signal reshaping approximation

Statistical values are computed based on received source images. An adaptive reshaping function is selected for one or more source images based on the one or more statistical values. ... Dolby Laboratories Licensing Corporation

01/18/18 / #20180020220

Video compression and transmission techniques

Embodiments feature families of rate allocation and rate control methods that utilize advanced processing of past and future frame/field picture statistics and are designed to operate with one or more coding passes. At least two method families include: a family of methods for a rate allocation with picture look-ahead; and a family of methods for average bit rate (abr) control methods. ... Dolby Laboratories Licensing Corporation

01/18/18 / #20180018984

Assessment and adjustment of audio installation

Example embodiments disclosed herein relate to assessment and adjustment for an audio environment. A computer-implemented method is provided. ... Dolby Laboratories Licensing Corporation

01/18/18 / #20180018977

Enhancement of spatial audio signals by modulated decorrelation

Some methods involve receiving an input audio signal that includes n input audio channels, the input audio signal representing a first soundfield format having a first soundfield format resolution, n being an integer ≧2. A first decorrelation process may be applied to two or more of the input audio channels to produce a first set of decorrelated channels, the first decorrelation process maintaining an inter-channel correlation of the set of input audio channels. ... Dolby Laboratories Licensing Corporation

01/18/18 / #20180018932

Transitioning between video priority and graphics priority

A processor receives input video data of a video dynamic range and input dynamic metadata. It also receives: input graphics data of a graphics dynamic range and input static metadata, display identification data from a target display over a video interface, and a blending priority map characterizing a per-pixel priority of output pixels in an image generated by blending the input video data and the input graphics data. ... Dolby Laboratories Licensing Corporation

01/11/18 / #20180014139

Adaptive audio construction

Described herein is a method for creating an object-based audio signal from an audio input, the audio input including one or more audio channels that are recorded to collectively define an audio scene. The one or more audio channels are captured from a respective one or more spatially separated microphones disposed in a stable spatial configuration. ... Dolby Laboratories Licensing Corporation

01/11/18 / #20180014015

Encoding, decoding, and representing high dynamic range images

Techniques are provided to encode and decode image data comprising a tone mapped (tm) image with hdr reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (hdr) image and a derivative tone-mapped (tm) image that comprises one or more color alterations that would not be recoverable from the tm image with a luminance ratio image. ... Dolby Laboratories Licensing Corporation

01/11/18 / #20180013927

Display management for high dynamic range video

A display management processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. The input image is first transformed into a perceptually-quantized (pq) color space, preferably the ipt-pq color space. ... Dolby Laboratories Licensing Corporation

01/11/18 / #20180013879

Methods and devices for improvements relating to voice quality estimation

This disclosure falls into the field of voice communication systems, more specifically it is related to the field of voice quality estimation in a packet based voice communication system. In particular the disclosure provides a method and device for 5 reducing a prediction error of the voice quality estimation by considering the content of lost packets. ... Dolby Laboratories Licensing Corporation

01/11/18 / #20180012610

Audio encoder and decoder with dynamic range compression metadata

An audio processing unit (apu) is disclosed. The apu includes a buffer memory configured to store at least one frame of an encoded audio bitstream, where the encoded audio bitstream includes audio data and a metadata container. ... Dolby Laboratories Licensing Corporation

01/11/18 / #20180011503

Digitally controlled ac protection and attenuation circuit

A protection and attenuation circuit for sensitive ac loads is described. The circuit provides ac power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an ac power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, pwm. ... Dolby Laboratories Licensing Corporation

01/11/18 / #20180011365

High dynamic range displays using filterless lcd(s) for increasing contrast and resolution

A display provides increased contrast and resolution via first lcd panel energized to generate an image and a second lcd panel configured to increase contrast of the image. The second panel is an lcd panel without color filters and is configured to increase contrast by decreasing black levels of dark portions of images using polarization rotation and filtration. ... Dolby Laboratories Licensing Corporation

01/04/18 / #20180007374

Chroma subsampling and gamut reshaping

. . Downsampled video content is generated in a subsampling color space from linearized video content in the subsampling color space. The linearized video content represents a first spatial dimension, whereas the downsampled video content represents a second spatial dimension lower than the first spatial dimension. ... Dolby Laboratories Licensing Corporation








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