公开(公告)号：US10212421B2

公开(公告)日：2019-02-19

申请号：US15394879

申请日：2016-12-30

申请人： intoPIX s.a.

发明人： Valentin Dessy ,  Pascal Hubert Pellegrin ,  Thomas Denison ,  Charles Daniel Buysschaert ,  Gael Rouvroy ,  Gauthier Crucifix ,  Tanguy Gilmont

IPC分类号： G06K9/36 ,  H04N19/124 ,  H04N19/132 ,  H04N19/146 ,  H04N19/18 ,  H04N19/184 ,  H04N19/645 ,  H04N19/12 ,  H04N19/137 ,  H04N19/423 ,  H04N19/44 ,  H04N19/91

摘要： The invention provides a method and device for compressing a sequence of signed coefficients wherein coefficients are grouped, for each group, the greatest coded line index (GCLI) is determined, a quantization level t is applied and only the GCLI-t lowest weight bits of the coefficients are copied into the output stream together with the value of the GCLI. According to the invention, sign bits are not coded for coefficient having a zero quantized value. The invention also provides a method for determining a data budget required for compressing a sequence of signed coefficients, in dependence of a quantization level, and a method for compressing an image within the limits of a given data budget constraint. The invention provides a compressed data set coding an image in an efficient way.

公开(公告)号：US20180192051A1

公开(公告)日：2018-07-05

申请号：US15394879

申请日：2016-12-30

申请人： intoPIX s.a.

发明人： Valentin Dessy ,  Pascal Hubert Pellegrin ,  Thomas Denison ,  Charles Daniel Buysschaert ,  Gael Rouvroy ,  Gauthier Crucifix ,  Tanguy Gilmont

IPC分类号： H04N19/124 ,  H04N19/184 ,  H04N19/12 ,  H04N19/91 ,  H04N19/137 ,  H04N19/423 ,  H04N19/44

CPC分类号： H04N19/124 ,  H04N19/12 ,  H04N19/132 ,  H04N19/137 ,  H04N19/146 ,  H04N19/18 ,  H04N19/184 ,  H04N19/423 ,  H04N19/44 ,  H04N19/645 ,  H04N19/91

摘要： The invention provides a method and device for compressing a sequence of signed coefficients wherein coefficients are grouped, for each group, the greatest coded line index (GCLI) is determined, a quantization level t is applied and only the GCLI-t lowest weight bits of the coefficients are copied into the output stream together with the value of the GCLI. According to the invention, sign bits are not coded for coefficient having a zero quantized value. The invention also provides a method for determining a data budget required for compressing a sequence of signed coefficients, in dependence of a quantization level, and a method for compressing an image within the limits of a given data budget constraint. The invention provides a compressed data set coding an image in an efficient way.

公开(公告)号：US10334246B2

公开(公告)日：2019-06-25

申请号：US15414831

申请日：2017-01-25

申请人： intoPIX s.a.

发明人： Gael Rouvroy ,  Thomas Denison ,  Tanguy Gilmont

IPC分类号： H04N19/124 ,  H04N19/126 ,  H04N19/146 ,  H04N19/184 ,  H04N19/91 ,  H03M7/30 ,  H04N19/136

摘要： The invention relates to a method for compressing a set of input binary data values x, all coded in a same number B of bits, into a corresponding set of output data values x′, all coded in a smaller number b of bits, obtainable by (i) computing a quantization step size dq dq = 2 B + 1 2 b + 1 - 1 (ii) dividing the range of values [0, 2B−1[, into 2b subranges, the first subrange being [0, INT(dq/2)[ the ith subrange being [INT((i−3/2)*dq)+1, INT((i−1/2)*dq)[, for i going from 2 to 2b The invention also relates to a method for decompressing data and to applications of said method for compressing/decompressing video data, and to devices for performing these operations.

公开(公告)号：US20170223354A1

公开(公告)日：2017-08-03

申请号：US15414831

申请日：2017-01-25

申请人： intoPIX s.a.

发明人： Gael Rouvroy ,  Thomas Denison ,  Tanguy Gilmont

IPC分类号： H04N19/124 ,  H04N19/146 ,  H04N19/91 ,  H04N19/184

CPC分类号： H04N19/124 ,  H03M7/3059 ,  H03M7/3071 ,  H04N19/126 ,  H04N19/136 ,  H04N19/146 ,  H04N19/184 ,  H04N19/91

摘要： The invention relates to a method for compressing a set of input binary data values x, all coded in a same number B of bits, into a corresponding set of output data values x′, all coded in a smaller number b of bits, obtainable by (i) computing a quantization step size dq dq = 2 B + 1 2 b + 1 - 1 (ii) dividing the range of values [0, 2B−1[, into 2b subranges, the first subrange being [0, INT(dq/2)[ the ith subrange being [INT((i−3/2)*dq)+1, INT((i−1/2)*dq)[, for i going from 2 to 2b The invention also relates to a method for decompressing data and to applications of said method for compressing/decompressing video data, and to devices for performing these operations.