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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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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. Examples for chroma quantization tables for... Dolby Laboratories Licensing Corporation

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. The method comprises determining a sub-band object probability for a sub-band of the audio signal in a frame of the audio content, the sub-band object probability indicating a probability... Dolby Laboratories Licensing Corporation

System and optimizing loudness and dynamic range across different playback devices

Embodiments are directed to a method and system for receiving, in a bitstream, metadata associated with the audio data, and analyzing the metadata to determine whether a loudness parameter for a first group of audio playback devices are available in the bitstream. Responsive to determining that the parameters are present... Dolby Laboratories Licensing Corporation

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. If the first value is not a reserved value, then the first value... Dolby Laboratories Licensing Corporation

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. A histogram transfer function... Dolby Laboratories Licensing Corporation

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. Some embodiments provide 3D projection systems in which the spatial modulator is combined... Dolby Laboratories Licensing Corporation

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. The images are encoded into a video stream. The motion characteristics... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

Adaptive arithmetic coding of audio content

Disclosed is a system and computer program product of encoding audio content and corresponding method. The method includes determining a characteristic of the audio content, the characteristic of the audio content including at least one of a type or a property of the audio content. Also the method includes classifying... Dolby Laboratories Licensing Corporation

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. The... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

Method for and 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. However, some source directions are attenuated for 2D loudspeaker setups like e.g. 5.1... Dolby Laboratories Licensing Corporation

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;... Dolby Laboratories Licensing Corporation

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. Audio reproduction data may be authored by creating metadata for audio objects. The metadata may be created with reference to speaker... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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. If so, the device... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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. The monoscopic video is transmitted to a device where the “checkerboard” is decoded. Portions of the checkerboard (e.g., “black” portions) are used to reconstruct one of the stereoscopic... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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. A processor of the video conferencing system may identify a potential region of... Dolby Laboratories Licensing Corporation

Methods and systems for generating and interactively rendering object based audio

Methods for generating an object based audio program, renderable in a personalizable manner, and including a bed of speaker channels renderable in the absence of selection of other program content (e.g., to provide a default full range audio experience). Other embodiments include steps of delivering, decoding, and/or rendering such a... Dolby Laboratories Licensing Corporation

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. The control system may be capable of determining, based at least in part on the microphone data, instances of one or more acoustic events. The... Dolby Laboratories Licensing Corporation

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. The method comprises extracting at least one video object from video content associated with the channel-based audio content, and determining information about the at least... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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),... Dolby Laboratories Licensing Corporation

Method and 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. A vector of coefficient domain signals is separated into a vector of... Dolby Laboratories Licensing Corporation

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. The illumination may comprise a series of lighting elements that vary smoothly from one element to another at the spatial light... Dolby Laboratories Licensing Corporation

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... Dolby Laboratories Licensing Corporation

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... 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. A noise mask... 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. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The... 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... Dolby Laboratories Licensing Corporation

02/01/18 / #20180034429

System and 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... 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. In the method, directionally-controlled reflections are generated, wherein directionally-controlled reflections impart a desired perceptual cue to an audio input signal... 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. In... 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. This source metadata determines a specific... 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. The audio data may include conference participant speech... 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 / #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. One or more variables of a cost function may be based, at least in part, on the conversational dynamics data. The cost... Dolby Laboratories Licensing Corporation

01/25/18 / #20180027352

System and 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. Channel-based streams have rendering information encoded by means... 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... 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... 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. The method includes obtaining a first audio signal captured by a device located in an environment. The method also includes analyzing a characteristic of the first audio signal to determine an acoustic... 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... 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. A portion of source video content is adaptively reshaped, based on the selected adaptive reshaping function to generate a portion of... 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. By assigning the pixels in the residual image to different pixel groups based on... 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... 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... 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. The circuit monitors characteristics of the AC... Dolby Laboratories Licensing Corporation

01/11/18 / #20180012609

Transmission-agnostic presentation-based program loudness

This disclosure falls into the field of audio coding, in particular it is related to the field of providing a framework for providing loudness consistency among differing audio output signals. In particular, the disclosure relates to methods, computer program products and apparatus for encoding and decoding of audio data bitstreams... 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. The metadata container includes a header and one or more metadata payloads after... 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... 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. A color volume mapping... 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... 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... Dolby Laboratories Licensing Corporation

01/04/18 / #20180005639

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... Dolby Laboratories Licensing Corporation

01/04/18 / #20180005641

Method for decoding a higher order ambisonics (hoa) representation of a sound or soundfield

βe=┌log2(┌log2(√{square root over (KMAX)}·O)┐+1)┐.... Dolby Laboratories Licensing Corporation

01/04/18 / #20180005643

Modeling and reduction of drone propulsion system noise

In some embodiments, a method, apparatus and computer program for reducing noise from an audio signal captured by a drone (e.g., canceling the noise signature of a drone from the audio signal) using a model of noise emitted by the drone's propulsion system set, where the propulsion system set includes... Dolby Laboratories Licensing Corporation

01/04/18 / #20180006011

Pixel tile structures and layouts

An overall displacement tolerance applicable to each pixel tile in a plurality of pixel tiles to be used as parts of an image rendering surface is determined. Each pixel tile in the plurality of pixel tiles comprises a plurality of sub-pixels. Random displacements are generated in each pixel tile in... Dolby Laboratories Licensing Corporation

Patent Packs
01/04/18 / #20180006837

Post-conference playback system having higher perceived quality than originally heard in the conference

Some aspects of the present disclosure involve the recording, processing and playback of audio data corresponding to conferences, such as teleconferences. In some teleconference implementations, the audio experience heard when a recording of the conference is played back may be substantially different from the audio experience of an individual conference... Dolby Laboratories Licensing Corporation

01/04/18 / #20180007327

Methods and systems for high dynamic range image projectors

Projection systems and/or methods for efficient use of light by recycling a portion of the light energy for future use are disclosed. In one embodiment, a projection display system is disclosed comprising a light source; an integrating rod that receives light from said light source at a proximal end that... Dolby Laboratories Licensing Corporation

01/04/18 / #20180007356

Reshaping curve optimization in hdr coding

In a system for coding high dynamic range (HDR) images using lower-dynamic range (LDR) images, a reshaping function allows for a more efficient distribution of the codewords in the lower dynamic range images for improved compression. A trim pass of the LDR images by a colorist may satisfy a director's... Dolby Laboratories Licensing Corporation

01/04/18 / #20180007368

Methods and systems for image intra-prediction mode management

Embodiments of the present invention relate to methods and systems for ordering, communicating and applying pixel intra-prediction modes.... 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. Opponent channel data is derived in... Dolby Laboratories Licensing Corporation

01/04/18 / #20180007484

Method for decoding a higher order ambisonics (hoa) representation of a sound or soundfield

βe=┌log2(┌log2(√{square root over (KMAX)}·O)┐+1)┐.... Dolby Laboratories Licensing Corporation

12/28/17 / #20170371167

Discrete laser fiber inputs for image projectors

Discrete light fiber inputs for high powered image projector display systems are disclosed herein. Various embodiments disclosed herein may employ a bundle of light fiber inputs, a diffuser and reducing relay optic to convert the fiber input array into a smaller pattern of spots that may be interfaced to a... Dolby Laboratories Licensing Corporation

12/28/17 / #20170371168

Improved integration rod assemblies for image projectors

Integrating rod modules are disclosed comprising a plurality of single and/or solid integrating rods that are mated together by straps. Such modules tend to comprise a greater length than the single and/or solid integrating rods and provide good illumination to a modulator that light from a light source is transmitted... Dolby Laboratories Licensing Corporation

12/28/17 / #20170372709

Method and device for decoding an audio soundfield representation

Soundfield signals such as e.g. Ambisonics carry a representation of a desired sound field. The Ambisonics format is based on spherical harmonic decomposition of the soundfield, and Higher Order Ambisonics (HOA) uses spherical harmonics of at least 2nd order. However, commonly used loudspeaker setups are irregular and lead to problems... Dolby Laboratories Licensing Corporation

12/28/17 / #20170372719

Sibilance detection and mitigation

The present disclosure relates to sibilance detection and mitigation in a voice signal. A method of sibilance detection and mitigation is described. In the method, a predetermined spectrum feature is extracted from a voice signal, the predetermined spectrum feature representing a distribution of signal energy over a voice frequency band.... Dolby Laboratories Licensing Corporation

12/28/17 / #20170373656

Loudspeaker-room equalization with perceptual correction of spectral dips

A method for generating a perceptual equalization (EQ) filter applicable to an audio signal to equalize the audio signal, including: generating a full EQ filter for use in performing full equalization on the signal; and modifying the frequency-amplitude spectrum of the full EQ filter in accordance with a dip detection... Dolby Laboratories Licensing Corporation

12/28/17 / #20170373857

Metadata transcoding

The present document relates to transcoding of metadata, and in particular to a method and system for transcoding metadata with reduced computational complexity. A transcoder configured to transcode an inbound bitstream comprising an inbound content frame and an associated inbound metadata frame into an outbound bitstream comprising an outbound content... Dolby Laboratories Licensing Corporation

12/28/17 / #20170374317

Adjusting spatial congruency in a video conferencing system

Example embodiments disclosed herein relate to spatial congruency adjustment. A method for adjusting spatial congruency in a video conference is disclosed. The method in unwarping a visual scene captured by a video endpoint device into at least one rectilinear scene, the video endpoint device being configured to capture the visual... Dolby Laboratories Licensing Corporation

12/28/17 / #20170374382

Interpolation of video compression frames

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame... Dolby Laboratories Licensing Corporation

12/28/17 / #20170374383

Interpolation of video compression frames

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame... Dolby Laboratories Licensing Corporation

Patent Packs
12/28/17 / #20170374484

Hybrid, priority-based rendering adaptive audio

Embodiments are directed to a method of rendering adaptive audio by receiving input audio comprising channel-based audio, audio objects, and dynamic objects, wherein the dynamic objects are classified as sets of low-priority dynamic objects and high-priority dynamic objects, rendering the channel-based audio, the audio objects, and the low-priority dynamic objects... Dolby Laboratories Licensing Corporation

12/21/17 / #20170364752

Sound and video object tracking

Image data relating to real-world objects or persons is collected from a scene while collecting audio data relating to the real-world objects or persons from the same scene. The audio data is used to derive sound objects corresponding to the real-world objects or persons. The image data is used to... Dolby Laboratories Licensing Corporation

12/21/17 / #20170365268

Reconstructing audio signals with multiple decorrelation techniques and differentially coded parameters

A method performed in an audio decoder for decoding M encoded audio channels representing N audio channels is disclosed. The method includes receiving a bitstream containing the M encoded audio channels and a set of spatial parameters, decoding the M encoded audio channels, and extracting the set of spatial parameters... Dolby Laboratories Licensing Corporation

12/21/17 / #20170365273

Audio source separation

A method of audio source separation from audio content is disclosed. The method includes determining a spatial parameter of an audio source based on a linear combination characteristic of the audio source and an orthogonality characteristic of two or more audio sources to be separated in the audio content. The... Dolby Laboratories Licensing Corporation

12/14/17 / #20170359045

Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal

The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one... Dolby Laboratories Licensing Corporation

12/07/17 / #20170352330

Optimizing light output profile for dual-modulation display performance

Techniques for optimizing light output profiles in display systems are described. A light output profile is defined in relation to a plurality of sample locations on an illuminated surface. Point spread functions that satisfy illumination performance values specified in the light output profile in aggregate are computed or derived. A... Dolby Laboratories Licensing Corporation

12/07/17 / #20170352355

Methods and encoding and decoding multi-channel hoa audio signals

A method for encoding multi-channel HOA audio signals for noise reduction comprises steps of decorrelating the channels using an inverse adaptive DSHT, the inverse adaptive DSHT comprising a rotation operation and an inverse DSHT, with the rotation operation rotating the spatial sampling grid of the iDSHT, perceptually encoding each of... Dolby Laboratories Licensing Corporation

12/07/17 / #20170353696

Handling nuisance in teleconference system

The disclosure relates to handling nuisance in teleconference system. An endpoint device (400) for use in a teleconference includes an acquiring unit (401), a judging unit (402), a controller (403) and a processing unit (404). The acquiring unit acquires a media stream for presentation in the teleconference, and receives information... Dolby Laboratories Licensing Corporation

12/07/17 / #20170353810

Adaptive panner of audio objects

An audio object including audio content and object metadata is received. The object metadata indicates an object spatial position of the audio object to be rendered by audio speakers in a playback environment. Based on the object spatial position and source spatial positions of the audio speakers, initial gain values... Dolby Laboratories Licensing Corporation

11/30/17 / #20170344852

Projection-based audio object extraction from audio content

A method is disclosed for audio object extraction from an audio content which includes identifying a first set of projection spaces including a first subset for a first channel and a second subset for a second channel of the plurality of channels. The method may further include determining a first... Dolby Laboratories Licensing Corporation

11/30/17 / #20170346460

Adjusting dynamic range of an audio signal based on one or more dynamic equalization and/or dynamic range control parameters

The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one... Dolby Laboratories Licensing Corporation

11/30/17 / #20170347125

Directed interpolation and data post-processing

An encoding device evaluates a plurality of processing and/or post-processing algorithms and/or methods to be applied to a video stream, and signals a selected method, algorithm, class or category of methods/algorithms either in an encoded bitstream or as side information related to the encoded bitstream. A decoding device or post-processor... Dolby Laboratories Licensing Corporation

11/30/17 / #20170347215

Measurement, verification and correction of time alignment of multiple audio channels and associated metadata

Some methods may involve receiving a block of audio data, the block including N pulse code modulated (PCM) audio channels, including audio samples for each of the N channels, receiving metadata associated with the block of audio data and receiving a first set of values corresponding to reference audio samples.... Dolby Laboratories Licensing Corporation

11/23/17 / #20170336645

3d projection system using laser light sources

Laser or narrow band light sources (e.g., red, green, and blue) are utilized to form left (e.g., R1, G1, B1) and right (e.g., R2, G2, B2) images of a 3D projection. Off-axis viewing of the projections which has the potential to cause crosstalk and/or loss of energy/brightness in any channel... Dolby Laboratories Licensing Corporation

11/23/17 / #20170337934

Vector noise cancellation

Techniques are provided for vector noise cancellation. Different value combinations for a plurality of weighting factors may be established for a plurality of selection regions. Each value combination for the plurality of weighting factors may correspond to a different combination of a set of input signals. One or more characteristics... Dolby Laboratories Licensing Corporation

11/23/17 / #20170338784

Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal

The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one... Dolby Laboratories Licensing Corporation

11/23/17 / #20170338785

Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal

The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one... Dolby Laboratories Licensing Corporation

11/23/17 / #20170338786

Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal

The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one... Dolby Laboratories Licensing Corporation

11/23/17 / #20170338833

Method and device for arithmetic encoding or arithmetic decoding

... Dolby Laboratories Licensing Corporation

11/23/17 / #20170339406

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... Dolby Laboratories Licensing Corporation

11/23/17 / #20170339407

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... Dolby Laboratories Licensing Corporation

11/23/17 / #20170339429

Encoding and decoding architectures for format compatible 3d video delivery

Encoding and decoding architectures for 3D video delivery are described, such as 2D compatible 3D video delivery and frame compatible 3D video delivery. The architectures include pre-processing stages to pre-process the output of a base layer video encoder and/or decoder and input the pre-processed output into an enhancement layer video... Dolby Laboratories Licensing Corporation

11/23/17 / #20170339504

Impedance matching filters and equalization for headphone surround rendering

Embodiments are described for designing a filter in a magnitude domain performing an impedance filtering function over a frequency domain to compensate for directional cues for the left and right ears of the listener as a function of virtual source angles during headphone virtual sound reproduction. The filter is derived... Dolby Laboratories Licensing Corporation

11/23/17 / #20170339506

Metadata-preserved audio object clustering

Example embodiments disclosed herein relate to audio object clustering. A method for metadata-preserved audio object clustering is disclosed. The method comprises classifying a plurality of audio objects into a number of categories based on information to be preserved in metadata associated with the plurality of audio objects. The method further... Dolby Laboratories Licensing Corporation








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