公开(公告)号：US20180131958A1

公开(公告)日：2018-05-10

申请号：US15867203

申请日：2018-01-10

Applicant: Sun Patent Trust

Inventor： Toshiyasu SUGIO ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toru MATSUNOBU

IPC: H04N19/513 ,  H04N19/56 ,  H04N19/52 ,  H04N19/105 ,  H04N19/107 ,  H04N19/503

CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/107 ,  H04N19/503 ,  H04N19/52 ,  H04N19/56

Abstract: A decoding method and apparatus are provided. A first candidate having a first motion vector that has been used to decode a first block, a first prediction direction that corresponds to the first motion vector, and a first reference picture index that identifies a first reference picture is derived. A second candidate having a second motion vector that has been used to decode a second block, a second prediction direction that corresponds to the second motion vector, and a second reference picture index that identifies a second reference picture is derived. When a total number of candidates is less than a maximum number, a third candidate is derived by combining the first motion vector and the first reference picture index for the first prediction direction of the first candidate and the second motion vector and the second reference picture index for the second prediction direction of the second candidate.

公开(公告)号：US20180124424A1

公开(公告)日：2018-05-03

申请号：US15861222

申请日：2018-01-03

Applicant: Sun Patent Trust

Inventor： Hisao SASAI ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Toshiyasu SUGIO ,  Kyoko TANIKAWA ,  Toru MATSUNOBU

IPC: H04N19/52 ,  H04N19/13 ,  H04N19/46 ,  H04N19/122 ,  H04N19/184 ,  H04N19/176

Abstract: The image coding method includes: determining a context for a current block to be processed, from among a plurality of contexts; and performing arithmetic coding on the control parameter for the current block to generate a bitstream corresponding to the current block, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is one of “mvd_l0” and “mvd_l1”.

公开(公告)号：US20180103256A1

公开(公告)日：2018-04-12

申请号：US15837477

申请日：2017-12-11

Applicant: Sun Patent Trust

Inventor： Tadamasa TOMA ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Hisao SASAI ,  Toshiyasu SUGIO ,  Kyoko TANIKAWA ,  Toru MATSUNOBU ,  Kengo TERADA

IPC: H04N19/15 ,  H04N19/46 ,  H04N19/70 ,  H04N19/132

CPC classification number: H04N19/15 ,  G06T9/00 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/423 ,  H04N19/46 ,  H04N19/70

Abstract: An encoding apparatus of encoding units included in a picture is provided. The encoding apparatus generates a first flag indicating whether a removal time of encoded data from a buffer by a hypothetical decoder is set per unit. When the removal time is set per unit, a second flag is generated which indicates whether an interval between removal times of the units is constant. When the second flag indicates that the interval is constant, common-interval information is generated which is distinct from the second flag and indicates a constant time interval between the removal times of the units. A bitstream including the encoded data, the first flag, the second flag, and the common-interval information is generated, with the common-interval information being included in control information of the bitstream.

公开(公告)号：US20180070096A1

公开(公告)日：2018-03-08

申请号：US15810378

申请日：2017-11-13

Applicant: Sun Patent Trust

Inventor： Takeshi TANAKA ,  Hisao SASAI

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/194 ,  H04N19/91 ,  H03M7/40 ,  H04N19/13 ,  H04N19/46 ,  H04N19/61

CPC classification number: H04N19/44 ,  H03M7/4006 ,  H03M7/4018 ,  H04N19/13 ,  H04N19/176 ,  H04N19/194 ,  H04N19/46 ,  H04N19/61 ,  H04N19/91

Abstract: An image coding method for improving coding efficiency by using more appropriate probability information is provided. The image coding method includes: a first coding step of coding a first set of blocks included in a first region sequentially based on first probability information; and a second coding step of coding a second set of blocks included in a second region sequentially based on second probability information. In the first coding step , the first probability information is updated depending on data of a target block to be coded, after coding the target block and before coding a next target block. In the second coding step, the second probability information is updated depending on the first probability information updated in the first coding step, before coding the first target block.

公开(公告)号：US20170374376A1

公开(公告)日：2017-12-28

申请号：US15698955

申请日：2017-09-08

Applicant: Sun Patent Trust

Inventor： Kengo TERADA ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toshiyasu SUGIO ,  Toru MATSUNOBU

IPC: H04N19/44 ,  H04N19/90 ,  H04N19/70 ,  H04N19/13 ,  H04N19/18 ,  H04N19/176 ,  H04N19/167 ,  H04N19/91 ,  H04N19/60 ,  H04N19/61

CPC classification number: H04N19/44 ,  H04N19/13 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/61 ,  H04N19/70 ,  H04N19/90 ,  H04N19/91

Abstract: An image coding method for coding an image on a block-by-block basis, includes: selecting, for each of a plurality of sub-blocks included in a coding-target block and each including a plurality of coefficients, a context for performing arithmetic coding on a parameter indicating a coding-target coefficient included in the sub-block from a context set corresponding to the sub-block, based on at least one reference coefficient located around the coding-target coefficient, the coding-target block being a transform unit; and performing arithmetic coding on the parameter indicating the coding-target coefficient using probability information about the selected context, wherein, in the selecting, the context is selected from the context set, the context set corresponding to a sum of (i) a value indicating a position in a horizontal direction of the sub-block in the coding-target block and (ii) a value indicating a position in a vertical direction of the sub-block in the coding-target block.

公开(公告)号：US20170374371A1

公开(公告)日：2017-12-28

申请号：US15697652

申请日：2017-09-07

Applicant: Sun Patent Trust

Inventor： Hisao SASAI ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Toshiyasu SUGIO ,  Kyoko TANIKAWA ,  Toru MATSUNOBU

IPC: H04N19/176 ,  H04N19/593 ,  H04N19/463 ,  H04N19/196 ,  H04N19/124 ,  H04N19/159 ,  H04N19/157 ,  H04N19/13 ,  H04N19/61 ,  H04N19/21

CPC classification number: H04N19/176 ,  H04N19/124 ,  H04N19/13 ,  H04N19/157 ,  H04N19/159 ,  H04N19/196 ,  H04N19/21 ,  H04N19/463 ,  H04N19/593 ,  H04N19/61

Abstract: The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is one of “ref_idx_l0” and “ref_idx_l1”.

公开(公告)号：US20170264912A1

公开(公告)日：2017-09-14

申请号：US15606103

申请日：2017-05-26

Applicant: Sun Patent Trust

Inventor： Toshiyasu SUGIO ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Hisao SASAI

IPC: H04N19/513 ,  H04N19/503

CPC classification number: H04N19/513 ,  H04N19/159 ,  H04N19/176 ,  H04N19/177 ,  H04N19/44 ,  H04N19/503 ,  H04N19/51 ,  H04N19/52 ,  H04N19/521 ,  H04N19/527 ,  H04N19/577 ,  H04N19/597

Abstract: A moving picture coding method includes: coding a coding target block using a motion vector; generating motion vector predictors; and coding the motion vector using one of the motion vector predictors generated in the generating of the motion vector predictors. In the generating of the motion vector predictors, a replacement vector which replaces a temporal motion vector predictor is added to the motion vector predictors when it is impossible to obtain the temporal motion vector predictor from a block which is included in a coded picture different from the coding target picture and corresponds to the coding target block.

公开(公告)号：US20170264901A1

公开(公告)日：2017-09-14

申请号：US15607811

申请日：2017-05-30

Applicant: Sun Patent Trust

Inventor： Matthias NARROSCHKE ,  Hisao SASAI

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/44 ,  H04N19/147 ,  H04N19/635 ,  H04N19/68 ,  H04N19/86 ,  H04N19/136 ,  H04N19/615 ,  H04N19/42

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/147 ,  H04N19/439 ,  H04N19/44 ,  H04N19/46 ,  H04N19/48 ,  H04N19/61 ,  H04N19/615 ,  H04N19/635 ,  H04N19/68 ,  H04N19/80 ,  H04N19/82 ,  H04N19/86

Abstract: The present invention relates to a method for encoding and decoding an image signal and to corresponding apparatuses therefor. In particular, during the encoding and/or decoding of an image signal filtering with at least two filters is performed. The sequence of the filter application and possibly the filters are selected and the filtering is applied in the selected filtering order and with the selected filters. The determination of the sequence of applying the filters may be performed either separately in the same way at the encoder and at the decoder, or, it may be determined at the encoder and signaled to the decoder.

公开(公告)号：US20170230665A1

公开(公告)日：2017-08-10

申请号：US15498774

申请日：2017-04-27

Applicant: Sun Patent Trust

Inventor： Hisao SASAI ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Toshiyasu SUGIO

IPC: H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  H04N19/122 ,  H04N19/124 ,  H04N19/52

CPC classification number: H04N19/13 ,  H03M7/4018 ,  H04N19/119 ,  H04N19/122 ,  H04N19/124 ,  H04N19/136 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/61 ,  H04N19/91

Abstract: An image coding method comprising: obtaining current signals to be coded of each of the processing units of the image; generating a binary signal by performing binarization on each of the current signals to be coded; selecting a context for each of the current signals to be coded from among a plurality of contexts; performing arithmetic coding of the binary signal by using coded probability information associated with the context selected in the selecting; and updating the coded probability information based on the binary signal, wherein, in the selecting, the context for the current signal to be coded is selected, as a shared context, for a signal which is included in one of a plurality of processing units and has a size different from a size of the processing unit including the current signal to be coded.

公开(公告)号：US20170208331A1

公开(公告)日：2017-07-20

申请号：US15473934

申请日：2017-03-30

Applicant: Sun Patent Trust

Inventor： Viktor WAHADANIAH ,  Chong Soon LIM ,  Sue Mon Thet NAING ,  Hai Wei SUN ,  Takahiro NISHI ,  Hisao SASAI ,  Youji SHIBAHARA ,  Toshiyasu SUGIO ,  Kyoko TANIKAWA ,  Toru MATSUNOBU ,  Kengo TERADA

IPC: H04N19/134 ,  H04N19/119 ,  H04N19/172 ,  H04N19/70 ,  H04N19/42 ,  H04N19/44 ,  H04N19/573 ,  H04N19/58 ,  H04N19/105 ,  H04N19/174

CPC classification number: H04N19/134 ,  H04N19/105 ,  H04N19/115 ,  H04N19/119 ,  H04N19/136 ,  H04N19/172 ,  H04N19/174 ,  H04N19/42 ,  H04N19/423 ,  H04N19/44 ,  H04N19/573 ,  H04N19/58 ,  H04N19/70

Abstract: An image coding method includes: writing, into a sequence parameter set, buffer description defining information for defining a plurality of buffer descriptions; writing, into the sequence parameter set, reference list description defining information for defining a plurality of reference list descriptions corresponding to the buffer descriptions; and writing, into a first header of each processing unit which is included in a coded bitstream, buffer description selecting information for specifying a selected buffer description.