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    Method and device for coding and decoding an image by block cutting into zones
    1.
    发明申请
    Method and device for coding and decoding an image by block cutting into zones 有权

    公开(公告)号：US20210392320A1

    公开(公告)日：2021-12-16

    申请号：US17291813

    申请日：2019-11-06

    Applicant: FONDATION B-COM

    Inventor： Félix Henry ,  Gordon Clare ,  Pierrick Philippe

    IPC: H04N19/105 ,  H04N19/176 ,  H04N19/119 ,  H04N19/167 ,  H04N19/593 ,  H04N19/159

    Abstract: A method for encoding or decoding at least one image, an image being split into blocks of elements. The method includes, for at least one block: splitting the block into at least two areas; and processing at least one of the areas. The processing includes scanning the elements of the area according to a predetermined scanning order, and for at least one scanned element, called a current element: selecting at least one predictor element previously encoded or decoded according to a prediction function; and predicting the current element: from the at least one predictor element, if the at least one predictor element belongs to the area; or from at least one replacement value, otherwise.

    Image decoding method, encoding method, devices, terminal equipment and computer programs therefor
    2.
    发明授权
    Image decoding method, encoding method, devices, terminal equipment and computer programs therefor 有权

    公开(公告)号：US11159794B2

    公开(公告)日：2021-10-26

    申请号：US16638644

    申请日：2018-07-25

    Applicant: FONDATION B-COM

    Inventor： Victorien Lorcy ,  Pierrick Philippe

    IPC: H04N19/12 ,  H04N19/119 ,  H04N19/176 ,  H04N19/60

    Abstract: A method for decoding a digital image from encoded data representative of the image. The image is divided into blocks processed in a defined order. The method includes, for a current block having a predetermined number (Mv) of lines and number (Mh) of columns: decoding coefficients of the current block from coded data; decoding an index representative of an identifier of a transform among a plurality of transforms and identifying the transform, a transform being expressed as a vertical subtransform of size Mv*Mv and a horizontal subtransform of size Mh*Mh; transforming the current block into a decoded block transformed, from the transform obtained, by successive application of the vertical subtransform and then the horizontal subtransform or respectively of the horizontal subtransform and then the vertical subtransform; and reconstructing the image from the transformed decoded block. The transforming includes: a modified use of core sub-transform coefficients, their absolute values being retained.

    Image decoding method, encoding method, devices, terminal equipment and computer programs therefor
    4.
    发明授权
    Image decoding method, encoding method, devices, terminal equipment and computer programs therefor 有权

    公开(公告)号：US11736694B2

    公开(公告)日：2023-08-22

    申请号：US17494299

    申请日：2021-10-05

    Applicant: FONDATION B-COM

    Inventor： Victorien Lorcy ,  Pierrick Philippe

    IPC: H04N19/12 ,  H04N19/119 ,  H04N19/176 ,  H04N19/60

    CPC classification number: H04N19/12 ,  H04N19/119 ,  H04N19/176 ,  H04N19/60

    Abstract: A method for decoding a digital image from encoded data representative of the image. The image is divided into blocks processed in a defined order. The method includes, for a current block having a predetermined number (Mv) of lines and number (Mh) of columns: decoding coefficients of the current block from coded data; decoding an index representative of an identifier of a transform among a plurality of transforms and identifying the transform, a transform being expressed as a vertical subtransform of size Mv*Mv and a horizontal subtransform of size Mh*Mh; transforming the current block into a decoded block transformed, from the transform obtained, by successive application of the vertical subtransform and then the horizontal subtransform or respectively of the horizontal subtransform and then the vertical subtransform; and reconstructing the image from the transformed decoded block. The transforming includes: a modified use of core sub-transform coefficients, their absolute values being retained.

    IMAGE DECODING METHOD, ENCODING METHOD, DEVICES, TERMINAL EQUIPMENT AND COMPUTER PROGRAMS THEREFOR
    5.
    发明申请
    IMAGE DECODING METHOD, ENCODING METHOD, DEVICES, TERMINAL EQUIPMENT AND COMPUTER PROGRAMS THEREFOR 有权

    公开(公告)号：US20220030239A1

    公开(公告)日：2022-01-27

    申请号：US17494299

    申请日：2021-10-05

    Applicant: FONDATION B-COM

    Inventor： Victorien Lorcy ,  Pierrick Philippe

    IPC: H04N19/12 ,  H04N19/119 ,  H04N19/176 ,  H04N19/60

    Abstract: A method for decoding a digital image from encoded data representative of the image. The image is divided into blocks processed in a defined order. The method includes, for a current block having a predetermined number (Mv) of lines and number (Mh) of columns: decoding coefficients of the current block from coded data; decoding an index representative of an identifier of a transform among a plurality of transforms and identifying the transform, a transform being expressed as a vertical subtransform of size Mv*Mv and a horizontal subtransform of size Mh*Mh; transforming the current block into a decoded block transformed, from the transform obtained, by successive application of the vertical subtransform and then the horizontal subtransform or respectively of the horizontal subtransform and then the vertical subtransform; and reconstructing the image from the transformed decoded block. The transforming includes: a modified use of core sub-transform coefficients, their absolute values being retained.

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