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    DECODING METHOD, ENCODING METHOD AND APPARATUS
    1.
    发明申请
    DECODING METHOD, ENCODING METHOD AND APPARATUS 有权

    公开(公告)号：US20240430426A1

    公开(公告)日：2024-12-26

    申请号：US18709088

    申请日：2022-11-10

    Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

    Inventor： Liang WEI ,  Fangdong CHEN ,  Li WANG

    IPC: H04N19/124 ,  H04N19/172 ,  H04N19/186

    Abstract: A decoding method and apparatus, and an encoding method and apparatus for a picture are provided, and relate to the field of video encoding and decoding. The decoding method includes: analyzing a code stream to obtain one or more picture frames, wherein a picture frame comprises one or more coding units (CUs); determining a plurality of quantization parameter (QP) values for the picture frame, wherein a CU comprises a plurality of quantization groups (QGs), and a QG corresponds to a QP value; and decoding the picture frame based on the plurality of QP values.

    PICTURE DECODING METHOD AND APPARATUS, AND PICTURE ENCODING METHOD AND APPARATUS
    3.
    发明申请
    PICTURE DECODING METHOD AND APPARATUS, AND PICTURE ENCODING METHOD AND APPARATUS 有权

    公开(公告)号：US20250047881A1

    公开(公告)日：2025-02-06

    申请号：US18709164

    申请日：2022-11-10

    Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

    Inventor： Fangdong CHEN ,  Yan WANG

    IPC: H04N19/196 ,  H04N19/105 ,  H04N19/119 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

    Abstract: The present disclosure discloses picture decoding methods and apparatuses, and picture encoding methods and apparatuses, relating to the field of video coding and decoding technologies, and solving the problem of low prediction efficiency in a process of picture coding and decoding (or video coding and decoding). The picture decoding method includes: parsing a bit stream to obtain a syntax element, where the syntax element is configured to obtain a residual block of a to-be-decoded unit, and the to-be-decoded unit includes at least one prediction group; determining a prediction mode of any one prediction group in the at least one prediction group; obtaining a prediction value of the any one prediction group by performing prediction for the any one prediction group with the prediction mode; and decoding the to-be-decoded unit based on the residual block of the to-be-decoded unit and the prediction value of each one in the at least one prediction group.

    DECODING METHOD AND APPARATUS, ENCODING METHOD AND APPARATUS, AND DEVICE
    5.
    发明申请
    DECODING METHOD AND APPARATUS, ENCODING METHOD AND APPARATUS, AND DEVICE 有权

    公开(公告)号：US20220345736A1

    公开(公告)日：2022-10-27

    申请号：US17762003

    申请日：2020-09-16

    Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

    Inventor： Fangdong CHEN

    IPC: H04N19/46 ,  H04N19/157 ,  H04N19/103 ,  H04N19/176

    Abstract: The present disclosure provides a decoding method and apparatus, an encoding method and apparatus, and a device. The decoding method includes: determining prediction-mode flag information of a current block, the prediction-mode flag information includes a flag value of each of one or more of N candidate prediction modes; when the flag value is a first value, the flag value indicates that a candidate prediction mode is enabled, and when the flag value is a second value, the flag value indicates that the candidate prediction mode is disabled, and for the flag value of one of the N candidate prediction modes, if the current block does not satisfy a decoding condition of the flag value of the candidate prediction mode, the flag value is a derived flag value of the candidate prediction mode; determining a target prediction mode used by the current block according to the prediction-mode flag information, where the target prediction mode is one of the N candidate prediction modes; and decoding the current block according to the target prediction mode. The present disclosure can improve the encoding performance.

    ENCODING AND DECODING METHOD, APPARATUS, AND DEVICE
    6.
    发明申请
    ENCODING AND DECODING METHOD, APPARATUS, AND DEVICE 有权

    公开(公告)号：US20220232242A1

    公开(公告)日：2022-07-21

    申请号：US17595777

    申请日：2020-06-17

    Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

    Inventor： Fangdong CHEN

    IPC: H04N19/513 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

    Abstract: An encoding and decoding method, apparatus, and device is disclosed. The method comprises: if characteristic information of a current block meets a specific condition, performing the following steps to acquire a target prediction value of the current block or a sub-block of the current block: determining a first original prediction value based on first unidirectional motion information of the current block, and determining a second original prediction value based on second unidirectional motion information of the current block; determining a horizontal velocity based on the first original prediction value and the second original prediction value; determining a vertical velocity based on the first original prediction value and the second original prediction value; acquiring a prediction compensation value based on the horizontal velocity and the vertical velocity; and acquiring the target prediction value based on the first original prediction value, the second original prediction value and the prediction compensation value.

    FILTERING METHOD AND APPARATUS AND DEVICES
    8.
    发明公开
    FILTERING METHOD AND APPARATUS AND DEVICES 审中-公开

    公开(公告)号：US20240146916A1

    公开(公告)日：2024-05-02

    申请号：US18262227

    申请日：2022-03-02

    Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

    Inventor： Dongping PAN ,  Yucheng SUN ,  Fangdong CHEN ,  Li WANG

    IPC: H04N19/117 ,  H04N19/105 ,  H04N19/182 ,  H04N19/80

    CPC classification number: H04N19/117 ,  H04N19/105 ,  H04N19/182 ,  H04N19/80

    Abstract: Filtering methods, apparatus, and devices are provided. In one aspect, a filtering method includes: determining whether enhanced adaptive leveling filtering is enabled for a current adaptive leveling filtering unit; if it is determined that the enhanced adaptive leveling filtering is enabled for the current adaptive leveling filtering unit, performing adaptive leveling filtering on the current adaptive leveling filtering unit by using a first filter; if it is determined that the enhanced adaptive leveling filtering is disabled for the current adaptive leveling filtering unit, performing adaptive leveling filtering on the current adaptive leveling filtering unit by using a second filter. The first filter includes a centrosymmetric filter with a 7*7 cross shape plus a 5*5 square shape, and the second filter includes a centrosymmetric filter with a 7*7 cross shape plus a 3*3 square shape.

    ENCODING AND DECODING METHOD, APPARATUS, AND DEVICE
    9.
    发明公开
    ENCODING AND DECODING METHOD, APPARATUS, AND DEVICE 审中-公开

    公开(公告)号：US20230344985A1

    公开(公告)日：2023-10-26

    申请号：US18009949

    申请日：2021-06-24

    Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

    Inventor： Yucheng SUN ,  Xiaoqiang CAO ,  Fangdong CHEN ,  Li WANG

    IPC: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

    CPC classification number: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

    Abstract: Embodiments of the present disclosure provide an encoding and decoding method, apparatus and device. The method includes: obtaining a weight prediction angle and weight configuration parameters; configuring reference weight values for surrounding positions outside the current block; determining a surrounding matching position to which the pixel position points; determining a target weight value of the pixel position based on a reference weight value associated with the surrounding matching position, and determining an associated weight value of the pixel position based on the target weight value of the pixel position; determining a first prediction value of the pixel position and a second prediction value; determining a weighted prediction value of the pixel position based on the first prediction value, target weight value, second prediction value and associated weight value; determining weighted prediction values of the current block based on the weighted prediction value of each pixel position of the current block.

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