Interdigital Vc Holdings, Inc.

Interdigital Ce Patent Holdings, Sas

Thomson Licensing

Dolby Laboratories Licensing Corporation

Interdigital Madison Patent Holdings, Sas

Interdigital Ce Patent Holdings

Interdigital Madison Patent Holdings

Dolby International Ab

Pierre Andrivon

Philippe Bordes

Edouard Francois

David Touze

Sebastien Lasserre

Franck Hiron

Yannick Olivier

Emmanuel Jolly

Patrick Lopez

Philippe Salmon

Marie-Jean Colaitis

Franck Galpin

Fabrice Leleannec

Christophe Chevance

Jean-Claude Chevet

Michel Kerdranvat

Fabrice Urban

Philippe De Lagrange

Fabrice LeLeannec

Celine Guede

Julien Ricard

Erik Reinhard

John Matthew Town

Masaru Yamamoto

David Gendron

Nicolas Caramelli

Gary Donnan

Fabrice Le Leannec

Jurgen Stauder

Ya Chen

Karam Naser

Patrick Morvan

Joan Llach Pinsach

Patrick Perez

Catherine Serre

Srinivas Gudumasu

Joaquin Zepeda Salvatierra

Gaëlle Martin-Cocher

Sébastien Lasserre

Timothee Guillerm

John Town

A method for decoding a picture block is disclosed. The decoding method comprises: decoding () at least one stream S_diff into decoded data and into one information for identifying a reconstructed reference picture in a decoder picture buffer; reconstructing () a special reference picture from at least the identified reconstructed reference picture and from the decoded data; reconstructing () the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

Coding and decoding methods of a picture block, corresponding devices and data stream

At least one embodiment relates to provides a method of encoding/decoding attribute of orthogonally projected 3D samples and in-between 3D samples in which an information indicates whether at least one first attribute patch of 2D samples obtained by encoding the attribute of said at least one orthogonally projected 3D samples according to a first attribute coding mode, and at least one second attribute patch of 2D samples of an image obtained by encoding the attribute of at least one in-between 3D sample, are stored in separate images.

Encoding and decoding a point cloud using patches for in-between samples

Video coding tools can be controlled by including syntax in a video bitstream that makes better use of video decoding resources. An encoder inserts syntax into a video bitstream to enable a decoder to parse the bitstream and easily control which tools combinations are enabled, which combinations are not permitted, and which tools are activated for various components in a multiple component bitstream, leading to potential parallelization of bitstream decoding.

Managing coding tools combinations and restrictions

A method comprising: obtaining () a syntax element associated with video data, wherein said syntax element specifies that a cross-color component transform process in which at least one second color component is transformed based on at least one first color component different from the second color component is to be applied to the video data as a post processing process following a decoding process to be applied to the video data.

Method and device for luma mapping with cross component scaling

A device and a method for outputting video content for display on a display. At least one processor displays a first video content on the display, receives a second video content to display, obtains a first luminance value for the first video content, extracts a second luminance value from the second video content, adjusts a luminance of a frame of the second video content based on the first and second luminance values and outputs the frame of the second video content for display on the display. The video content can comprise frames and a luminance value can be equal to an average frame light level for the most recent L frames of the corresponding video content. In case a luminance value is unavailable, a Maximum Frame Average Light Levels of the first video content and the second video content can be used instead.

Device and method for transition between luminance levels

At least one embodiment relates to a method for smoothing (filtering) the geometry of a point cloud frame by performing an analysis and filtering of said geometry point cloud in a 2D space, without reconstruction of 3D samples in a 3D space, and by using a flexible filtering operator that, in addition to moving existing points, can also remove points or add new ones.

Processing a point cloud

Different quantization matrices may be transmitted corresponding to different block sizes, color components and prediction modes. To more efficiently signal the coefficients of the quantization matrices, in one implementation, a unified matrix identifier matrixId is used, based on a size identifier (sizeId) that relates to CU size with larger sizes listed first, and a matrix type (matrixTypeId) with luma QMs listed first. For example, the unified identifier is derived as: matrixId=N*sizeId+matrixTypeId, where N is the number of possible type identifiers, e.g., N=6. This single identifier allows referring to any previously transmitted matrix when using prediction (copy), and transmitting larger matrices first avoids interpolation in the prediction process. When a block uses the Intra Block Copy prediction mode, QM identifier may be derived as if the block uses the INTER prediction mode.

Single-index quantization matrix design for video encoding and decoding

At least one embodiment relates to the transfer, between two processing units or memories, of a three-channels texture image and at least two image-structured data used for reconstructing the geometry of the point cloud. Such transfer comprises copying the three channels of the three-channels texture image into the three channels of a four-channels image, and storing, in the fourth channel of the four-channels image, a combined information obtained by combining altogether the at least two image-structured data. The four-channel image is then transferred.

Transporting format of a coded point cloud

A method and apparatus for performing a forward mapping function or its inverse is implemented through information conveyed in a bitstream to perform mapping. The information can be implemented in a uniform or non-uniform lookup table. A decoder can receive the information and derive the inverse function to be used. In one embodiment, a decoder receives information representative of an inverse mapping function and uses the information to implement an inverse mapping lookup table for intra coded picture portions and can derive a forward mapping lookup table to be used with an inverse mapping lookup table for inter coded picture portions.

In-loop reshaping adaptive reshaper direction

A method for decoding a picture block is disclosed. The decoding method comprises: —decoding () at least one stream S_diff into decoded data and into one information for identifying a re-constructed reference picture in a decoder picture buffer; —reconstructing () a special reference picture from at least the identified reconstructed reference picture and from the decoded data; —reconstructing () the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

Methods and apparatus provide mapping functions for video encoding or decoding by replacing a pivot point of a uniformly sampled inverse mapping function by another pivot point not located on an original non-uniformly sampled inverse mapping function. In one embodiment a last pivot point of the inverse mapping function is extended based on a previous slope whose curve is plotted between two previous pivot points or based on the preservation of the slope which is dual to the existing slope of the equivalent section in the forward mapping function. Syntax is provided that assists the mapping and inverse mapping and clipping.

Luma mapping with chroma scaling (LMCS) lut extension and clipping

A method for encoding a LUT defined as a lattice of vertices is disclosed. At least one value is of each vertex of the lattice. The method comprises for a current vertex:

Method for encoding and method for decoding a LUT and corresponding devices

A method includes encoding a first message including first parameters for a first color transform that transforms a video signal into a first color-mapped video signal; encoding a second message including second parameters for a second color transform that transforms the video signal into a second color-mapped video signal; and encoding the video signal, the first message, and the second message in a video bitstream. A method includes decoding the video bitstream into the video signal, the first message including the first parameters, and the second message including the second parameters, and performing at least one of the following: displaying the video signal; transforming the video signal into the first color-mapped video signal by applying the first color transform and displaying the first color-mapped video signal; and transforming the video signal into the second color-mapped video signal by applying the second color transform and displaying the second color-mapped video signal.

Method for encoding and method for decoding a color transform and corresponding devices

A method and an apparatus are defined for displaying images on a flexible display in a head-mountable device (HMD). One or more flexible display devices may be inserted in the HMD. The one or more flexible display devices may be constrained by the HMD to take a particular curved form and wrap the field of view (FOV) of images displayed on the one or more flexible display devices for an improved user experience. The display surface of the one or more flexible displays may be divided in display areas, the display areas corresponding to a focus area and a peripheral FOV. Image processing may be differentiated according to display area.

Method for displaying images on a flexible display device in a head-mountable device and corresponding apparatus

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Liffre, France

Pierre Andrivon