INTER-LAYER DYNAMIC RANGE SCALABILITY FOR HDR VIDEO
Granted: March 11, 2021
Application Number:
20210076079
Methods, processes, and systems are presented for inter-layer scaling and mapping to perform dynamic-range scalability in video coding using single-loop video decoders. Two approaches are proposed: a) A mapping function is applied to each of the color components, b) a mapping function is applied to the luma component and luma-based scaling is applied to the chroma components. Both schemes may be combined with existing schemes for in-loop reshaping, such as luma mapping and chroma…
TONE-CURVE OPTIMIZATION METHOD AND ASSOCIATED VIDEO ENCODER AND VIDEO DECODER
Granted: March 11, 2021
Application Number:
20210076042
A method for generating metadata for use by a video decoder for displaying video content encoded by a video encoder includes: (1) accessing a target tone mapping curve; (2) accessing a decoder tone curve corresponding to a tone curve used by the video decoder for tone mapping the video content; (3) generating a plurality of parameters of a trim-pass function used by the video decoder to apply after applying the decoder tone curve to the video content, wherein the parameters of the…
Audio Processing in Adaptive Intermediate Spatial Format
Granted: March 4, 2021
Application Number:
20210065724
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. An AISF encoder device adaptively warps each ISF ring during ISF encoding to adjust angular distance between objects, resulting in increase in uniformity of energy distribution around the ISF…
METHODS, APPARATUS AND SYSTEMS FOR DECOMPRESSING A HIGHER ORDER AMBISONICS (HOA) SIGNAL
Granted: February 25, 2021
Application Number:
20210058729
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)). The ambient HOA component ({tilde over (C)}AMB(k?1)) comprises, in a layered mode,…
Blind Detection of Binauralized Stereo Content
Granted: February 25, 2021
Application Number:
20210056984
An apparatus and method of blind detection of binauralized audio. If the input content is detected as binaural, a second binauralization may be avoided. In this manner, the user experience avoids audio artifacts introduced by multiple binauralizations.
METHODS AND SYSTEMS FOR GENERATING AND RENDERING OBJECT BASED AUDIO WITH CONDITIONAL RENDERING METADATA
Granted: February 25, 2021
Application Number:
20210056978
Methods and audio processing units for generating an object based audio program including conditional rendering metadata corresponding to at least one object channel of the program, where the conditional rendering metadata is indicative of at least one rendering constraint, based on playback speaker array configuration, which applies to each corresponding object channel, and methods for rendering audio content determined by such a program, including by rendering content of at least one…
METHODS AND DEVICES FOR CODING SOUNDFIELD REPRESENTATION SIGNALS
Granted: February 18, 2021
Application Number:
20210050022
The present document describes a method (400) for encoding a soundfield representation (SR) input signal (101, 301) describing a soundfield at a reference position, wherein the SR input signal (101, 301) comprises a plurality of channels for a plurality of different directivity patterns of the soundfield at the reference position. The method (400) comprises extracting (401) one or more audio objects (103, 303) from the SR input signal (101, 301). Furthermore, the method (400) comprises…
Generating Binaural Audio in Response to Multi-Channel Audio Using at Least One Feedback Delay Network
Granted: February 18, 2021
Application Number:
20210051435
In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feedback delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a…
METHOD AND APPARATUS FOR SCREEN RELATED ADAPTATION OF A HIGHER-ORDER AMBISONICS AUDIO SIGNAL
Granted: February 18, 2021
Application Number:
20210051432
A method for generating loudspeaker signals associated with a target screen size is disclosed. The method includes receiving a bit stream containing encoded higher order ambisonics signals, the encoded higher order ambisonics signals describing a sound field associated with a production screen size. The method further includes decoding the encoded higher order ambisonics signals to obtain a first set of decoded higher order ambisonics signals representing dominant components of the sound…
Audio Equalization System and Method
Granted: February 18, 2021
Application Number:
20210050834
A variable-resolution graphic equalizer providing an improved interface for controlling gain values across the entire audio spectrum using many narrow-band filters (e.g., 120). It allows user selection of a frequency range for graphic equalization and automatically maps a reduced and fixed number of sliders to the selected range based on the number of filter bands falling within the selected range. In an audio processing system, specific user interface regions are highlighted to display…
LIGHT LEVEL MANAGEMENT WITH CONTENT SCAN ADAPTIVE METADATA
Granted: February 18, 2021
Application Number:
20210049747
A coded video sequence is received in a bitstream with a set of content scan adaptive metadata. It is ascertained if the set of content scan adaptive metadata is received. The set of content scan adaptive metadata includes: a maximum content light level parameter; a maximum frame average light level parameter. The maximum content light level parameter and maximum frame average light level parameter are both dependent on a scan type of the frames of the coded video sequence, the scan type…
SYSTEMS AND METHODS FOR LOCAL DIMMING IN MULTI-MODULATION DISPLAYS
Granted: February 18, 2021
Application Number:
20210047061
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…
Wireless Audio Source Switching
Granted: February 11, 2021
Application Number:
20210044887
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for wireless audio source switching. One of the methods includes receiving user input selecting a user interface control corresponding to one of a plurality of paired audio source devices with a wireless audio sink device that is a slave device of a first master/slave connection with a first paired audio source device of the plurality of paired audio source devices. The wireless audio sink…
SPEAKER FOR REFLECTING SOUND OFF VIEWING SCREEN OR DISPLAY SURFACE
Granted: January 28, 2021
Application Number:
20210029482
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…
PIECE-WISE-LINEAR MAPPING FOR IN-LOOP RESHAPING IN IMAGE CODING
Granted: January 28, 2021
Application Number:
20210029361
Given a representation of a forward reshaping function in an M-piecewise linear representation (M-PWL), methods, processes, and systems are presented for generating the forward reshaping function in an N-PWL representation (where N<M), by properly adjusting the first and last segments, and for generating a decoded bitstream using the adjusted N-PWL reshaping representation. Syntax methods for signaling reshaping parameters are also presented.
JITTER BUFFER CONTROL BASED ON MONITORING OF DELAY JITTER AND CONVERSATIONAL DYNAMICS
Granted: January 28, 2021
Application Number:
20210029009
Some implementations involve analyzing audio packets received during a time interval that corresponds with a conversation analysis segment to determine network jitter dynamics data and conversational interactivity data. The network jitter dynamics data may provide an indication of jitter in a network that relays the audio data packets. The conversational interactivity data may provide an indication of interactivity between participants of a conversation represented by the audio data. A…
METHOD AND APPARATUS FOR DECODING A BITSTREAM INCLUDING ENCODED HIGHER ORDER AMBISONICS REPRESENTATIONS
Granted: January 28, 2021
Application Number:
20210027795
Higher Order Ambisonics represents three-dimensional sound independent of a specific loudspeaker set-up. However, transmission of an HOA representation results in a very high bit rate. Therefore compression with a fixed number of channels is used, in which directional and ambient signal components are processed differently. For coding, portions of the original HOA representation are predicted from the directional signal components. This prediction provides side information which is…
IMAGE DEMOSAICING SYSTEM AND METHOD
Granted: January 28, 2021
Application Number:
20210027423
A method for demosaicing an image captured by an image sensor includes (a) computing, for each of a first plurality of interpolated pixel-values and based on neighboring primary pixel-values, a respective first confidence value; (b) generating a first thresholded mapping from a first coordinate mapping by removing each interpolated pixel-value having a first confidence value less than a threshold value; (c) repeating steps of computing and generating for a second and third sub-plurality…
Methods and Apparatus for Adjusting a Level of an Audio Signal
Granted: January 21, 2021
Application Number:
20210021247
The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain…
RENDERING WIDE COLOR GAMUT TWO-DIMENSIONAL (2D) IMAGES ON THREE-DIMENSIONAL (3D) CAPABLE DISPLAYS
Granted: January 21, 2021
Application Number:
20210021794
A display for displaying image data includes defining virtual color gamuts based on a plurality of primary display colors associated with a light source. At least one of the virtual color gamuts is defined to approximate an established color gamut. Intensity values associated with the virtual color gamuts are generated based on received video data, and the intensity values associated with the virtual color gamuts are used to generate drive values for the primary colors of the light…
