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    METHOD AND APPARATUS FOR SYNCHRONIZING DIFFERENT COMMUNICATION PORTS
    1.
    发明申请
    METHOD AND APPARATUS FOR SYNCHRONIZING DIFFERENT COMMUNICATION PORTS 有权

    公开(公告)号：US20210385058A1

    公开(公告)日：2021-12-09

    申请号：US17339377

    申请日：2021-06-04

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Romain GUIGNARD ,  Yacine EL KOLLI ,  Tristan HALNA DU FRETAY ,  Lionel TOCZE

    IPC: H04L7/00 ,  H04L12/24 ,  H04L29/06

    Abstract: A method of synchronization of a communication device comprising a first and second communication ports, each of the first and second communication port being associated with a respective first and second time system, the method comprising a regular master synchronization process synchronizing regularly the first time system with an external synchronization server according to a time synchronization protocol; a regular slave synchronization process synchronizing regularly the second time system with the first-time system; detecting a loss of synchronization between the first and second time system; determining which of the first and second time system is desynchronized; and synchronizing the desynchronized time system with the other one.

    METHOD, DEVICE, AND COMPUTER PROGRAM FOR ENHANCING ENCODING AND ENCAPSULATION OF POINT CLOUD DATA
    4.
    发明申请
    METHOD, DEVICE, AND COMPUTER PROGRAM FOR ENHANCING ENCODING AND ENCAPSULATION OF POINT CLOUD DATA 有权

    公开(公告)号：US20250056049A1

    公开(公告)日：2025-02-13

    申请号：US18720401

    申请日：2022-12-15

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Franck DENOUAL ,  Frédéric MAZE ,  Naël OUEDRAOGO ,  Hervé RUELLAN ,  Lionel TOCZE

    IPC: H04N19/70 ,  H04N19/172 ,  H04N19/597

    Abstract: A method for encapsulating point cloud data in a file compliant with the ISOBMFF standard. After having obtained point cloud data comprising 3D points, the obtained point cloud data being organized in at least one point cloud frame, at least two sub-frames of the at least one point cloud frame are determined, a timing information being associated with each of the at least two sub-frames, the timing information associated with one of the at least two sub-frames being different from the timing information associated with the other of the at least two sub-frames. Next, metadata describing the at least two sub-frames are generated, the generated metadata comprising or describing the timing information associated with each of the at least two sub-frames, and the obtained 3D points and the generated metadata are encapsulated in the file, each point cloud frame being encapsulated as one or more samples.

    METHOD, DEVICE, AND COMPUTER PROGRAM FOR IMPROVING SIGNALING OF MULTIPLE TRANSFORMATIONS APPLYING TO ENCAPSULATED MEDIA DATA
    5.
    发明申请
    METHOD, DEVICE, AND COMPUTER PROGRAM FOR IMPROVING SIGNALING OF MULTIPLE TRANSFORMATIONS APPLYING TO ENCAPSULATED MEDIA DATA 有权

    公开(公告)号：US20250024118A1

    公开(公告)日：2025-01-16

    申请号：US18767739

    申请日：2024-07-09

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Hervé RUELLAN ,  Franck DENOUAL ,  Lionel TOCZE ,  Jean LE FEUVRE

    IPC: H04N21/84 ,  H04N21/854

    Abstract: At least one embodiment of a method for encapsulating media data in a file, in a processing device, the media data comprising a plurality of samples, at least one sample being to be transformed by at least one transformation, the method comprising generating a track comprising the at least one sample to be transformed and descriptive metadata, the descriptive metadata comprising an indication that the track is restricted and a first restricted scheme description data structure comprising a first restriction scheme type indicating that at least one sample of the track is associated with at least one essential sample group description, wherein the first restricted scheme description data structure further comprises a second restricted scheme description data structure describing the at least one transformation and its parameters.

    METHOD, DEVICE, AND COMPUTER PROGRAM FOR IMPROVING RANDOM ACCESS IN POINT CLOUD DATA BIT-STREAM
    6.
    发明公开
    METHOD, DEVICE, AND COMPUTER PROGRAM FOR IMPROVING RANDOM ACCESS IN POINT CLOUD DATA BIT-STREAM 审中-公开

    公开(公告)号：US20240346698A1

    公开(公告)日：2024-10-17

    申请号：US18637143

    申请日：2024-04-16

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Lionel TOCZE ,  Franck DENOUAL ,  Frédéric MAZE

    IPC: G06T9/00 ,  H04N19/68 ,  H04N19/70

    CPC classification number: G06T9/00 ,  H04N19/68 ,  H04N19/70

    Abstract: According to some embodiments of the disclosure, it is provided a method for encapsulating point cloud data into an ISOBMFF-based media file, the point cloud data being organized in point cloud frames. After having generated a track describing a sequence of samples, each sample comprising at least one point cloud frame, the sequence of samples comprising at least one sync sample and a plurality of non-sync samples, at least one non-sync sample of the plurality of non-sync samples comprising a parameter set, and after having generated metadata describing whether a non-sync sample of the plurality of non-sync samples requires, to be decoded, a parameter set from another non-sync sample of the non-sync samples, the track and the metadata are encapsulated in the media file.

    SPATIAL POSITIONING METHOD
    8.
    发明申请
    SPATIAL POSITIONING METHOD 有权

    公开(公告)号：US20240428452A1

    公开(公告)日：2024-12-26

    申请号：US18749436

    申请日：2024-06-20

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Hervé RUELLAN ,  Benjamin GALMICHE ,  Gérald KERGOURLAY ,  Eric NASSOR ,  Lionel TOCZE

    IPC: G06T7/73

    Abstract: A method for determining a spatial position of an object using an image calibrated relative to a reference frame. The method comprises, after obtaining a candidate region associated with the object in the reference frame and projecting the candidate region into the calibrated image, adjusting the projected candidate region based on an image element associated with the object in the calibrated image, and determining a spatial position of the object using the adjusted projected candidate region.

    METHOD AND APPARATUS FOR ENCAPSULATING ENCODED MEDIA DATA IN A MEDIA FILE
    10.
    发明申请
    METHOD AND APPARATUS FOR ENCAPSULATING ENCODED MEDIA DATA IN A MEDIA FILE 有权

    公开(公告)号：US20220337846A1

    公开(公告)日：2022-10-20

    申请号：US17718072

    申请日：2022-04-11

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Naël OUEDRAOGO ,  Franck DENOUAL ,  Frédéric MAZE ,  Hervé RUELLAN ,  Lionel TOCZE

    IPC: H04N19/172 ,  H04N19/184 ,  H04N19/169

    Abstract: The present invention concerns a method of encapsulating subpicture bitstreams in at least one media file, the subpicture bitstreams corresponding to encoded media data of a subpicture corresponding to a rectangular region of video data, the method comprising: obtaining the plurality of subpicture bitstreams; encapsulating each subpicture bitstream in a subpicture track; generating at least one base track referencing at least two subpicture tracks and forming a spatial arrangement of the at least two subpicture tracks; generating information describing APS referenced by samples of the at least two subpicture tracks; encapsulating the subpicture tracks, the at least one base track and the information describing APS in the at least one media file.

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