公开(公告)号：US12167040B2

公开(公告)日：2024-12-10

申请号：US17914096

申请日：2021-03-22

Applicant: CANON KABUSHIKI KAISHA

Inventor： Naël Ouedraogo ,  Patrice Onno ,  Guillaume Laroche

IPC: H04N19/70 ,  H04N19/169 ,  H04N19/172 ,  H04N19/426

Abstract: A sequence of images is encoded in a bitstream as a series of picture units PU-01˜03. Each picture unit corresponds to one encoded image and includes one or more network abstraction layer (NAL) units NAL-01˜23. The NAL units may be video coding layer (VCL) NAL units which each contain encoded image data or adaptation parameter set NAL units which each contain an adaptation parameter set (APS) having parameters for performing one or more types of processing operation on the image data contained in one or more VCL NAL units. The APS NAL units may be prefix APS NAL units P-APS or suffix APS NAL units S-APS. An additional constraint is applied to the bitstream prohibiting inclusion of a prefix APS NAL unit after the first NAL unit of the picture unit concerned. This can avoid more than one APS applying to slices belonging to the same picture unit.

公开(公告)号：US12167028B2

公开(公告)日：2024-12-10

申请号：US18171154

申请日：2023-02-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume Laroche ,  Christophe Gisquet ,  Patrice Onno ,  Jonathan Taquet

IPC: H04N19/56 ,  H04N19/13 ,  H04N19/184

Abstract: A method of encoding a motion vector predictor index, in particular a Merge index, comprises generating a list of motion vector predictor candidates, in particular merge candidates. The list includes an ATMVP candidate. One of the motion vector predictor candidates in the list is selected. A motion vector predictor index for the selected motion vector predictor candidate is generated using CABAC coding. One or more bits of the motion vector predictor index are bypass CABAC coded. For example, only the first bit of the motion vector predictor index is CABAC coded using a single context.

公开(公告)号：US12034953B2

公开(公告)日：2024-07-09

申请号：US17275091

申请日：2019-09-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume Laroche ,  Christophe Gisquet ,  Patrice Onno ,  Jonathan Taquet

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/13 ,  H04N19/176

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/13 ,  H04N19/176

Abstract: A signalling affine mode in an encoded video stream; in particular determining an inter prediction mode used for a portion of a bitstream and signalling affine motion mode in dependence on said inter prediction mode used in said portion of said bitstream. Related encoding and decoding methods and devices are also disclosed.

公开(公告)号：US12010319B2

公开(公告)日：2024-06-11

申请号：US18319237

申请日：2023-05-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Patrice Onno ,  Christophe Gisquet ,  Guillaume Laroche ,  Jonathan Taquet

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189

Abstract: The disclosure regards cross-component prediction and methods for deriving of a linear model for obtaining a first-component sample for a first-component block from an associated reconstructed second-component sample of a second-component block in the same frame, the method comprising determining the parameters of a linear equation representing a straight line passing through two points, each point being defined by two variables, the first variable corresponding to a second-component sample value, the second variable corresponding to a first-component sample value, based on reconstructed samples of both the first-component and the second-component; and deriving the linear model defined by the straight line parameters; wherein said determining the parameters uses integer arithmetic.

公开(公告)号：US12003779B2

公开(公告)日：2024-06-04

申请号：US17909160

申请日：2021-02-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume Laroche ,  Naël Ouedraogo ,  Patrice Onno

IPC: H04N19/70 ,  H04N19/117 ,  H04N19/157 ,  H04N19/174 ,  H04N19/30

CPC classification number: H04N19/70 ,  H04N19/117 ,  H04N19/157 ,  H04N19/174 ,  H04N19/30

Abstract: A method of decoding video data from a bitstream, the bitstream comprising video data corresponding to one or more slices. The bitstream comprises a picture header comprising syntax elements to be used when decoding one or more slices, and a slice header comprising syntax elements to be used when decoding a slice. In the picture header at least one syntax element indicating whether a decoding tool may be used in the picture. When the decoding tool is used in the picture, at least one APS ID related syntax element is parsed for the decoding tool in the picture header. The decoding also comprises parsing, in a slice header, at least one syntax element indicating whether the decoding tool is to be used or not for that slice prior to syntax elements relating to other decoding tools. A bitstream is decoded using said syntax elements.

公开(公告)号：US11979581B2

公开(公告)日：2024-05-07

申请号：US18163743

申请日：2023-02-02

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume Laroche ,  Patrice Onno ,  Jonathan Taquet ,  Christophe Gisquet

IPC: H04N19/137 ,  H04N19/119 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/137 ,  H04N19/119 ,  H04N19/176 ,  H04N19/52

Abstract: The present disclosure concerns a method and a device for encoding or decoding video data. It concerns more particularly the encoding according to a particular encoding mode using a decoder side motion vector derivation mode referenced as frame-rate up conversion mode or FRUC mode. It concerns encoding and decoding improvement which reduce the need for memory accesses when using an encoding mode where the motion information is predicted using a decoder side motion vector derivation method.

公开(公告)号：US11979579B2

公开(公告)日：2024-05-07

申请号：US18163610

申请日：2023-02-02

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume Laroche ,  Patrice Onno ,  Jonathan Taquet ,  Christophe Gisquet

IPC: H04N19/137 ,  H04N19/119 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/137 ,  H04N19/119 ,  H04N19/176 ,  H04N19/52

Abstract: The present disclosure concerns a method and a device for encoding or decoding video data. It concerns more particularly the encoding according to a particular encoding mode using a decoder side motion vector derivation mode referenced as frame-rate up conversion mode or FRUC mode. It concerns encoding and decoding improvement which reduce the need for memory accesses when using an encoding mode where the motion information is predicted using a decoder side motion vector derivation method.

公开(公告)号：US11516466B2

公开(公告)日：2022-11-29

申请号：US17283163

申请日：2019-10-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume Laroche ,  Christophe Gisquet ,  Patrice Onno ,  Jonathan Taquet

IPC: H04N19/105 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70

Abstract: A method of encoding a motion information predictor index, comprising: generating a list of motion information predictor candidates; when an Affine Merge mode is used, selecting one of the motion information predictor candidates in the list as an Affine Merge mode predictor; when a non-Affine Merge mode is used, selecting one of the motion information predictor candidates in the list as a non-Affine Merge mode predictor; and generating a motion information predictor index for the selected motion information predictor candidate using CABAC coding, one or more bits of the motion information predictor index being bypass CABAC coded.

公开(公告)号：US11050902B2

公开(公告)日：2021-06-29

申请号：US16746601

申请日：2020-01-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume Laroche ,  Patrice Onno

IPC: H04N5/14 ,  H04N19/52 ,  H04N19/139 ,  H04N19/513 ,  H04N19/527 ,  H04N19/53 ,  H04N19/533 ,  H04N19/55 ,  H04N19/57 ,  H04N19/573

Abstract: A set of spatial motion information predictors to be encoded is generated from among spatial motion information predictors respectively associated with predetermined image portions adjacent to an image portion to be decoded, one of which is situated left of the image portion to be decoded. At least one condition is used to determine that a spatial motion information predictor is not includable in the set. At least one condition is a condition to exclude from the generated set of spatial motion information predictors a spatial motion information predictor that is a duplicate of another spatial motion information predictor. A temporal motion information predictor is not subjected to the duplicate exclusion condition used for the spatial motion information predictors and may be a duplicate of a spatial motion information predictor in the generated set. A motion information predictor is selected from among (i) the generated set of motion information predictors, (ii) the temporal motion information predictor, and (iii) a zero motion information predictor as a replacement for a non-includable spatial motion information predictor.

公开(公告)号：US10972742B2

公开(公告)日：2021-04-06

申请号：US15105521

申请日：2014-12-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Christophe Gisquet ,  Patrice Onno ,  Guillaume Laroche

IPC: H04N19/186 ,  G09G5/06 ,  H04N19/147 ,  H04N19/176 ,  H04N19/124 ,  H04N1/64 ,  H04N19/94 ,  H04N19/182 ,  H04N19/593 ,  H04N19/50

Abstract: The present invention is related to video coding and decoding, in particular HEVC RExt that define a palette coding mode dedicated to the coding of screen contents. In improved palette coding modes according to the invention, when building a palette, each time a new pixel is added to the class a palette entry defines, the palette entry is modified to take the means value of the pixels belonging to such class. In other improved palette coding modes, a built palette is post-processed to substitute a palette entry with a close entry of a palette predictor PRED. In yet other embodiments, palette coding modes having different threshold values to drive the building of their respective palettes are successively tested to use the best one in terms of rate-distortion criterion.