公开(公告)号：US11785193B2

公开(公告)日：2023-10-10

申请号：US16771523

申请日：2018-12-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Pierre Andrivon ,  David Touze ,  Catherine Serre

IPC: H04N9/64

CPC classification number: H04N9/64

Abstract: At least one embodiment obtain a method for reconstructing an image from metadata representing a given color space, comprising mapping said given color space to a candidate color space which encompasses in its convex hull all the primaries of the given color space; and reconstructing the image using said candidate color space.

公开(公告)号：US20230156208A1

公开(公告)日：2023-05-18

申请号：US18086554

申请日：2022-12-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Hiron ,  Pierre Andrivon ,  Patrick Lopez ,  PHILIPPE SALMON

IPC: H04N19/44 ,  H04N21/438 ,  H04N21/235 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

CPC classification number: H04N19/44 ,  H04N21/4384 ,  H04N21/2358 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

Abstract: A method for decoding a picture block is disclosed. The decoding method comprises: —decoding (10) 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 (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data; —reconstructing (16) the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

公开(公告)号：US11490104B2

公开(公告)日：2022-11-01

申请号：US16311414

申请日：2017-06-27

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Sebastien Lasserre ,  Pierre Andrivon ,  Philippe Bordes

IPC: H04N19/129 ,  H04N19/64 ,  H04N19/46 ,  G06F17/18

Abstract: Significance flags in advanced video compression systems are coded using contexts adaptive to the last N significance flags coded taken in a scanning order. One embodiment uses the last N significance flags in scanning order as a predictor to determine which of a plurality of sets of significance flag contexts to use for coding subsequent significance flags. A second embodiment uses the last N significance flags in scanning order as a predictor in order to modulate the probability value associated with significance flag contexts that are used to code significance flags for future coding.

公开(公告)号：US11025875B2

公开(公告)日：2021-06-01

申请号：US15572894

申请日：2016-05-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Urban ,  Philippe Bordes ,  Marie-Jean Colaitis ,  Pierre Andrivon

IPC: G06T1/20 ,  H04N9/67 ,  H04N19/463 ,  H04N1/60 ,  H04N9/68 ,  H04N19/186 ,  H04N19/70 ,  H04N19/52 ,  H04N11/20

Abstract: A method for color mapping a video signal into a mapped video signal responsive to at least one color mapping function is disclosed. To this aim, at least one black point offset is determined responsive to a color encoding system of the video signal and to a color encoding system of the mapped video signal. The at least one black point offset and the at least one color mapping function are then applied on the video signal to obtain the mapped video signal.

公开(公告)号：US10764549B2

公开(公告)日：2020-09-01

申请号：US16130347

申请日：2018-09-13

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Pierre Andrivon ,  Philippe Bordes ,  Franck Hiron ,  Masaru Yamamoto ,  Gary Donnan ,  John M. Town

IPC: H04N7/01 ,  H04N11/20 ,  H04N9/64 ,  H04N1/60 ,  G09G5/00 ,  H04N9/68 ,  G06T5/00 ,  G09G5/06 ,  H04N19/30

Abstract: The present disclosure generally relates to a method and device of converting a HDR version of a picture to a SDR version of this picture. The method is characterized in that it converts the HDR version to the SDR version of the picture according to: a first indicator that indicates the presence of color mapping parameters; a second indicator that indicates whether a device is configured to convert the HDR version to the SDR version of the picture by taking into account said color mapping parameters; and a third indicator that indicates whether converting without taking into account said color mapping parameters is inhibited.

公开(公告)号：US10600163B2

公开(公告)日：2020-03-24

申请号：US15821245

申请日：2017-11-22

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yannick Olivier ,  David Touze ,  Nicolas Caramelli ,  Pierre Andrivon

IPC: G06T5/00 ,  H04N9/73 ,  G06T5/20

Abstract: A method and device for reconstructing image data is provided that is representative of an original image data from a decoded image data and parameters obtained from a bitstream, the parameters having been processed from said original image data. The method provides a desaturating of a luma component, an inverse-mapping of desaturated luma component and a correction of chroma components. These operations are being modulated according to the value of a single modulation factor mod representative of a peak luminance of a presentation display on which the reconstructed image is intended to be displayed, a peak luminance of a particular range image and a peak luminance of the original image data or the mastering display used to grade the original image data.

公开(公告)号：US20240333954A1

公开(公告)日：2024-10-03

申请号：US18743536

申请日：2024-06-14

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Hiron ,  Pierre Andrivon ,  Patrick Lopez ,  Philippe Salmon

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/30 ,  H04N19/50 ,  H04N19/573 ,  H04N21/235 ,  H04N21/438

CPC classification number: H04N19/44 ,  H04N19/176 ,  H04N19/30 ,  H04N19/50 ,  H04N19/573 ,  H04N21/2358 ,  H04N21/4384

Abstract: A method for decoding a picture block is disclosed. The decoding method comprises: decoding (10) 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 (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data; reconstructing (16) the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

公开(公告)号：US11388447B2

公开(公告)日：2022-07-12

申请号：US17261658

申请日：2019-07-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Pierre Andrivon ,  Patrick Lopez ,  Marie-Jean Colaitis ,  David Touze

IPC: H04N19/98 ,  H04N19/70 ,  G06T5/00 ,  H04N19/186

Abstract: A medium dynamic range video signal and associated metadata are received, wherein the metadata include data representative of a peak luminance value of the signal. The medium dynamic range video signal is processed in a first mode to reconstruct a high dynamic range video signal based on a received standard dynamic range video signal and associated metadata if the peak luminance value of the medium dynamic range video signal is smaller than the peak luminance value of a presentation display, and in a second mode to optimize a received high dynamic range video signal for a rendering device if the peak luminance value of the medium dynamic range video signal is greater than the peak luminance value of the presentation display.

公开(公告)号：US20220167019A1

公开(公告)日：2022-05-26

申请号：US17669218

申请日：2022-02-10

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Pierre Andrivon ,  David Touze ,  Nicolas Caramelli

IPC: H04N19/65 ,  H04N19/44

Abstract: A method or device for reconstructing image data representative of original image data from decoded image data and parameters obtained from a bitstream is described. The parameters having been processed from the original image data. The method includes checking if parameters are lost, corrupted or not aligned with the decoded image data whose graphics or overlay is added to, when at least one of the parameters is lost, corrupted or not aligned with the decoded image data whose graphics or overlay is added to; selecting a recovery mode according to an information data indicating how the parameters have been processed; and recovering the at least one lost, corrupted or not aligned parameter by applying the selected recovery mode, the reconstruction of image data then taking also into account the recovered parameters.

公开(公告)号：US11323714B2

公开(公告)日：2022-05-03

申请号：US16300575

申请日：2017-05-05

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Sebastien Lasserre ,  Pierre Andrivon ,  Philippe Bordes

IPC: H04N19/13 ,  H04N19/70 ,  G06F17/18 ,  H04N19/91

Abstract: The present principles relate to a method and device for context-adaptive binary arithmetic coding a sequence of binary symbols representing a syntax element related to video data or a syntax element relative to a video data. The method comprises, for each binary symbol of the sequence of binary symbols:—obtaining (100) a context value from a context model defined for the binary symbol, said context value comprising bits representing the probability, called a first probability p, for the binary symbol to be equal to a binary value;—determining (110) a second probability p′ by modifying said first probability p according to at least one previously coded binary symbol of the sequence of binary symbols;—arithmetic coding (120) the binary symbol based on said second probability p′; and—updating and storing (130) the first probability p of said context value