公开(公告)号：US20250056063A1

公开(公告)日：2025-02-13

申请号：US18932423

申请日：2024-10-30

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：US20250056062A1

公开(公告)日：2025-02-13

申请号：US18932411

申请日：2024-10-30

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：US20240430419A1

公开(公告)日：2024-12-26

申请号：US18830324

申请日：2024-09-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Naël OUEDRAOGO ,  Franck DENOUAL

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An encoding method comprising the encoding of information allowing the decoder to infer the splitting of CTBs located at the right, respectively the bottom of a subpicture, which width, respectively height, is not a multiple of the size of the CTBs, when the subpicture is not located at the right, respectively the bottom, of the image. Corresponding decoding methods for the generated bitstream are also proposed.

公开(公告)号：US20240397127A1

公开(公告)日：2024-11-28

申请号：US18695606

申请日：2022-09-20

Applicant: CANON KABUSHIKI KAISHA

Inventor： Franck DENOUAL ,  Frédéric MAZE ,  Naël OUEDRAOGO ,  Jean LE FEUVRE

IPC: H04N21/235 ,  H04N21/845 ,  H04N21/854

Abstract: At least one embodiment of a method for encapsulating media data as fragments, each fragment comprising metadata and media data, the metadata describing encapsulation of the media data. After having obtained second media data to be encapsulated within a second fragment and second metadata describing encapsulation of the second media data, it is determined whether some of the second metadata are identical to some of first metadata belonging to a first fragment and describing encapsulation of first media data within the first fragment. If it is the case and if the second fragment is not to be parsed independently, the second media data and a portion of the second metadata are encapsulated within the second fragment, the second fragment further comprising an indication to signal that the metadata part of the second fragment comprises only a portion of the metadata required to parse the media data of the second fragment.

公开(公告)号：US20240107129A1

公开(公告)日：2024-03-28

申请号：US18257236

申请日：2021-12-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Hervé RUELLAN ,  Franck DENOUAL ,  Frédéric MAZE ,  Naël OUEDRAOGO ,  Masanori FUKADA

IPC: H04N21/854 ,  H04N21/2343 ,  H04N21/84

CPC classification number: H04N21/854 ,  H04N21/234327 ,  H04N21/23439 ,  H04N21/84

Abstract: A method of encapsulating image data in a media file, the image data being related to a main image to be generated based on a plurality of sub-images, wherein the method comprises: obtaining the plurality of sub-images, each sub-image being provided in at least one version; generating descriptive metadata for describing the main image and the plurality of sub-images; encapsulating the plurality of sub-images and the descriptive metadata in the media file; wherein the method further comprises: generating a progressive information defining a set of consecutive progressive steps for generating a version of the main image, each progressive step being associated with a set of sub-images versions required to generate the version of the main image; and embedding the progressive information in the descriptive metadata.

公开(公告)号：US20230164371A1

公开(公告)日：2023-05-25

申请号：US17917168

申请日：2021-04-06

Applicant: CANON KABUSHIKI KAISHA

Inventor： Franck DENOUAL ,  Frédéric MAZE ,  Naël OUEDRAOGO ,  Jean LE FEUVRE

IPC: H04N21/2343 ,  H04N19/169

CPC classification number: H04N21/2343 ,  H04N19/188

Abstract: A method for encapsulating a video bit-stream in a server, including obtaining at least one network abstraction layer unit (NAL unit) of a first picture, buffering the at least one obtained NAL unit, obtaining at least one NAL unit of a second picture, the second picture being a random access picture following the first picture, and encapsulating the at least one obtained NAL unit of the second picture and the at least one buffered NAL unit in an encapsulation structure making it possible to generate a video bit-stream without processing the encapsulated at least one buffered NAL unit when processing the encapsulated video bit-stream

公开(公告)号：US20230145618A1

公开(公告)日：2023-05-11

申请号：US17913074

申请日：2020-03-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume LAROCHE ,  Naël OUEDRAOGO ,  Patrice ONNO

IPC: H04N19/70 ,  H04N19/174

CPC classification number: H04N19/70 ,  H04N19/174

Abstract: There is provided a method of decoding video data from a bitstream, the bitstream comprising video data corresponding to one or more slices. Each slice may include one or more tiles. 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. Decoding a slice, comprises parsing the syntax elements. In a case where a slice includes multiple tiles, the parsing of a syntax element indicating an address of a slice is omitted if a syntax element is parsed that indicates that a picture header is signalled in the slice header. The bitstream is decoded using said syntax elements.

公开(公告)号：US20230065112A1

公开(公告)日：2023-03-02

申请号：US17787085

申请日：2020-12-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Guillaume LAROCHE ,  Naël OUEDRAOGO ,  Patrice ONNO

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/46 ,  H04N19/174 ,  H04N19/107

Abstract: A method of decoding video data from a bitstream is disclosed, the bitstream comprising video data corresponding to multiple slices, wherein the video bitstream comprises a picture header; the method comprising: determining a coding mode for at least one slice; determining a set of syntax elements to be used for said coding mode from said picture header; and decoding said at least one slice using said determined syntax elements. Corresponding encoding method, devices and computer programs are also disclosed.

公开(公告)号：US20230060709A1

公开(公告)日：2023-03-02

申请号：US17787196

申请日：2020-12-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Naël OUEDRAOGO ,  GUILLAUME LAROCHE ,  PATRICE ONNO

IPC: H04N19/119 ,  H04N19/174 ,  H04N19/70

Abstract: A method of processing image data for one or more image-(s), each image consisting of one or more tile(s) and being divisible into one or more image portion(s), wherein the image is divisible into one or more subpicture-(s), and the method comprises: determining one or more image portion(s) included in a subpicture; and —processing the one or more image(s) using information obtained from the determination.

公开(公告)号：US20230025332A1

公开(公告)日：2023-01-26

申请号：US17785851

申请日：2020-12-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： Franck DENOUAL ,  Naël OUEDRAOGO ,  Eric NASSOR ,  Frédéric MAZE ,  Jean LE FEUVRE

IPC: H04N19/172 ,  H04N21/845

Abstract: According to embodiments, the invention provides a method for encapsulating partitioned timed media data comprising timed samples, comprising in turn subsamples, the timed samples being grouped into groups, the method comprising: obtaining spatial tracks, each spatial track comprising at least one subsample of a first timed sample and one corresponding subsample of the other timed samples, the corresponding subsamples being located at the same spatial position in its own timed sample as the at least one subsample; creating a base track referencing at least some of the spatial tracks, the base track comprising reconstruction instructions, each of the reconstruction instructions being associated with a group of timed samples, enabling generating a portion of a bit-stream from sub-samples of spatial tracks, that belong to a same group of timed samples; and independently encapsulating each of the tracks in a least one media file.