公开(公告)号：US20180357742A1

公开(公告)日：2018-12-13

申请号：US15778657

申请日：2016-11-21

Applicant: B<>COM ,  Orange

Inventor： Felix Henry ,  Patrice Houze ,  Emilie Sirvent-Hien ,  Gaetan Le Guelvouit

IPC: G06T1/00 ,  H04N19/467 ,  H04N21/8358

CPC classification number: G06T1/0085 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N19/467 ,  H04N21/8358

Abstract: A method for processing a sequence of digital images. The method includes, for a current group: a) forming a main group including original images partitioned into spatial areas and including a watermarking zone; b) obtaining a main bitstream representing an area-based encoding of the images of the main group, in which for an area other than the watermarking area, the pixels of that zone are not predicted with reference to pixels in the watermarking area; c) for the watermarking area: forming a secondary group of images having the same temporal dimension as the main group and spatial dimensions equal to those of the watermarking area, inserting a first watermarking information value into the secondary group, and obtaining a first secondary bitstream representing images of the encoded secondary group including the first watermarking information value; and d) transmitting the main and first secondary bitstreams in the telecommunication network to a client.

公开(公告)号：US20170142444A1

公开(公告)日：2017-05-18

申请号：US15322156

申请日：2015-06-16

Applicant: B<>COM ,  Orange

Inventor： Felix Henry

IPC: H04N19/61 ,  H04N19/115 ,  H04N19/132 ,  H04N19/91 ,  H04N19/154 ,  H04N19/18 ,  H04N19/463 ,  H04N19/103 ,  H04N19/134

CPC classification number: H04N19/61 ,  H04N19/103 ,  H04N19/115 ,  H04N19/132 ,  H04N19/134 ,  H04N19/154 ,  H04N19/18 ,  H04N19/463 ,  H04N19/50 ,  H04N19/91

Abstract: A method of encoding a digital image that is divided into a plurality of blocks of pixels. The method includes, for a current block: predicting the current block values from at least one block previously processed; calculating a residual block; obtaining a residual block by applying a transform to pixels of the residual block; selecting coefficients signs to be predicted in the transformed residual block; predicting the selected signs encoded and decoded neighbouring blocks; calculating a prediction indicator from the predictions of the selected signs and their original values; entropic encoding the indicators obtained for the predicted signs; and determining a context of a coefficient of the current residual block and the sign of a coefficient of the transformed residual block is selected based on a predetermined score associated with the encoding context of the coefficient, the score being representative of a reliability level of the prediction of the sign.