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    Encoder, decoder, encoding method, and decoding method
    41.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US12238278B2

    公开(公告)日：2025-02-25

    申请号：US18242133

    申请日：2023-09-05

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Ryuichi Kanoh

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

    Abstract: An encoder includes memory and circuitry. The circuitry, using the memory, (i) selects a mode from among a plurality of modes each for deriving a motion vector, and derives a motion vector for a current block via the selected mode, and (ii) performs inter prediction encoding on the current block, using the derived motion vector, via one of a skip mode and a non-skip mode different from the skip mode. The plurality of modes include a plurality of first modes each for predicting the motion vector for the current block based on an encoded block neighboring the current block without encoding information indicating a motion vector into a stream. When a second mode included in the plurality of first modes is selected, the current block is encoded via the non-skip mode regardless of presence or absence of a residual coefficient.

    Communication apparatus and communication method for channel estimation
    42.
    发明授权
    Communication apparatus and communication method for channel estimation 有权

    公开(公告)号：US12237887B2

    公开(公告)日：2025-02-25

    申请号：US18545742

    申请日：2023-12-19

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Lei Huang ,  Yoshio Urabe ,  Rojan Chitrakar

    IPC: H04L1/02 ,  H04B7/0417 ,  H04B7/0452

    Abstract: The present disclosure provides communication apparatus and communication method for channel estimation. The communication apparatus comprises a transmitter, which in operation, transmits a physical layer protocol data unit (PPDU) to one or more other communication apparatus in a multiple-input multiple-output (MIMO) wireless network, the PPDU including a long training field (LTF) that facilitates the one or more other communication apparatus to estimate respective channels for respective communications with the communication apparatus; and a controller, which in operation, establishes the number of LTF symbols (NLTF) for generating the LTF in the PPDU, wherein the NLTF depends on a maximum value (NSTSMAX) of the number of space-time streams for each resource unit (RU) in the PPDU.

    User equipment and base station involved in a handover
    48.
    发明授权
    User equipment and base station involved in a handover 有权

    公开(公告)号：US12231971B2

    公开(公告)日：2025-02-18

    申请号：US17631398

    申请日：2020-08-05

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Ming-Hung Tao ,  Hidetoshi Suzuki ,  Rikin Shah ,  Akihiko Nishio ,  Hongchao Li

    IPC: H04W36/00 ,  H04W56/00

    Abstract: The present disclosure relates to a user equipment (UE) that comprises a receiver of the UE receives, from a source base station of a source radio cell, a common timing advance value for a target radio cell. The UE is connected to the source radio cell and is involved in a handover procedure to hand over the UE from the source radio cell to the target radio cell. Further, the common timing advance value is received from the source base station in a first message of the handover procedure, which also comprises a timing indication for transmitting a second message from the UE to the target base station. Then, a processor of the UE determines a first uplink timing of uplink transmissions to the target base station with respect to downlink transmissions from the target base station, based on the received common timing advance value and the timing indication. A transmitter of the UE transmits a second message of the handover procedure to the target base station based on the determined uplink timing. The processor determines a UE-specific timing advance value, specific to the UE and the target radio cell, to be used by the UE for performing uplink transmissions in the target radio cell.

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