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.

公开(公告)号：US20150281689A1

公开(公告)日：2015-10-01

申请号：US14431202

申请日：2013-09-16

Applicant: ORANGE

Inventor： Felix Henry

IPC: H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/137

CPC classification number: H04N19/105 ,  H04N19/102 ,  H04N19/117 ,  H04N19/137 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573 ,  H04N19/80

Abstract: A method is provided for coding at least one current image. The method includes: determining at least one parameter of a predetermining function, the function being able to transform a first subset of a set of previously decoded reference images into an approximation of a second subset of images of the set of reference images; applying the function according to the parameter determined to a third subset of the set of reference images, the third subset being different from the first subset, so as to obtain another set of previously decoded reference images; and coding the current image on the basis of the obtained set of reference images.

Abstract translation: 提供了一种用于编码至少一个当前图像的方法。 该方法包括：确定预定功能的至少一个参数，所述功能能够将一组先前解码的参考图像的第一子集变换为所述参考图像集合的第二子图像的近似值; 将所述函数根据所确定的参数应用于所述参考图像集合的第三子集，所述第三子集与所述第一子集不同，以便获得另一组先前解码的参考图像; 并且基于所获得的参考图像集编码当前图像。

公开(公告)号：US20150078454A1

公开(公告)日：2015-03-19

申请号：US14388658

申请日：2013-03-06

Applicant: Orange

Inventor： Felix Henry ,  Stéphane Pateux ,  Gordon Clare

IPC: H04N19/91 ,  H04N19/44

CPC classification number: H04N19/91 ,  H04N19/13 ,  H04N19/167 ,  H04N19/174 ,  H04N19/197 ,  H04N19/436 ,  H04N19/44 ,  H04N19/61

Abstract: A coding method includes cutting an image into a plurality of blocks containing symbols. Adjacent pairs of blocks are grouped into a predetermined number of tiles of the image. An entropy coder codes each tile by associating digital information with the symbols of each block of a tile under consideration, Coding includes, for the first block of the image, a substep of initializing state variables of the entropy coder. At least one data substream is generated and representative of at least one of the coded tiles. When the current block of the tile forms a boundary with an adjacent edge of a neighboring tile, the method includes writing in the substream all of the digital information that has been associated with the symbols during the coding, for the tile under consideration, of the blocks preceding the current block, and performing the initialization substep.

Abstract translation: 编码方法包括将图像切割成包含符号的多个块。 相邻的块对被分组成图像的预定数量的瓦片。 熵编码器通过将数字信息与考虑的瓦片的每个块的符号相关联来对每个瓦片进行编码，对于图像的第一块，编码包括初始化熵编码器的状态变量的子步骤。 生成至少一个数据子流并代表编码瓦片中的至少一个。 当瓦片的当前块与相邻瓦片的相邻边缘形成边界时，该方法包括在编码期间在子流中写入与所考虑的瓦片相关联的与符号相关联的所有数字信息， 在当前块之前的块，并执行初始化子步骤。