公开(公告)号：US20190158878A1

公开(公告)日：2019-05-23

申请号：US16092359

申请日：2017-04-05

Applicant: B<>COM

Inventor： Pierrick Philippe ,  Victorien Lorcy ,  Pierre Castel

IPC: H04N19/625 ,  H04N19/184 ,  H04N19/119

CPC classification number: H04N19/625 ,  H04N19/119 ,  H04N19/122 ,  H04N19/147 ,  H04N19/176 ,  H04N19/184

Abstract: A method for decoding a current block of a digital image. The method includes: decoding coefficients of the current block; and transforming the current block into a decoded block, by implementing a first sub step to produce an intermediate block, that applies to the column and row vectors of the current block, and a second substep to produce a block of pixels that applies to the row and column vectors of the intermediate block, resulting from the first substep; and rebuilding the image from the decoded block. At least one of the first and second substeps includes, for an input row or column vector: forming a first subvector of size K

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.

公开(公告)号：US10771817B2

公开(公告)日：2020-09-08

申请号：US16092359

申请日：2017-04-05

Applicant: B<>COM

Inventor： Pierrick Philippe ,  Victorien Lorcy ,  Pierre Castel

IPC: H04N19/625 ,  H04N19/176 ,  H04N19/122 ,  H04N19/147 ,  H04N19/119 ,  H04N19/184

Abstract: A method for decoding a current block of a digital image. The method includes: decoding coefficients of the current block; and transforming the current block into a decoded block, by implementing a first sub step to produce an intermediate block, that applies to the column and row vectors of the current block, and a second substep to produce a block of pixels that applies to the row and column vectors of the intermediate block, resulting from the first substep; and rebuilding the image from the decoded block. At least one of the first and second substeps includes, for an input row or column vector: forming a first subvector of size K

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.

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.

公开(公告)号：US20210136375A1

公开(公告)日：2021-05-06

申请号：US16638644

申请日：2018-07-25

Applicant: B<>COM

Inventor： Victorien Lorcy ,  Pierrick Philippe

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

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.