公开(公告)号：US20190289314A1

公开(公告)日：2019-09-19

申请号：US16433363

申请日：2019-06-06

Applicant: Sun Patent Trust

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

IPC: H04N19/513 ,  H04N19/103 ,  H04N19/176 ,  H04N19/44 ,  H04N19/70 ,  H04N19/52

Abstract: A method of performing motion vector prediction for a current block in a picture is provided which includes: deriving a candidate for a motion vector predictor to code a current motion vector of the current block, from a first motion vector of a first block that is spatially adjacent or temporally adjacent to the current block; adding the derived candidate to a list of candidates; and deriving at least one motion vector predictor based on a selected candidate from the list of candidates, wherein the deriving of the candidate includes determining whether to derive the candidate from the first motion vector, based on a type of a current reference picture and a type of a first reference picture, the current reference picture being referred to from the current block using the current motion vector, the first reference picture being referred to from the first block using the first motion vector.

公开(公告)号：US20190289304A1

公开(公告)日：2019-09-19

申请号：US16429340

申请日：2019-06-03

Applicant: Sun Patent Trust

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

IPC: H04N19/21 ,  H04N19/82 ,  H04N19/132 ,  H04N19/463 ,  H04N19/91

Abstract: The moving picture coding method for coding an input image includes: converting a value of a first parameter into a first binary signal, the first parameter identifying a type of a sample offset process to be applied to a reconstructed image corresponding to the input image; and coding at least a portion of the first binary signal through bypass arithmetic coding using a fixed probability.

公开(公告)号：US20190261017A1

公开(公告)日：2019-08-22

申请号：US16399437

申请日：2019-04-30

Applicant: Sun Patent Trust

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

IPC: H04N19/527 ,  H04N19/58 ,  H04N19/52 ,  H04N19/513

Abstract: An image coding method includes: deriving a candidate for a motion vector of a current block from a co-located motion vector; adding the candidate to a list; selecting the motion vector of the current block from the list; and coding the current block, wherein the deriving includes: deriving the candidate by a first derivation scheme in the case of determining that each of a current reference picture and a co-located reference picture is a long-term reference picture; and deriving the candidate by a second derivation scheme in the case of determining that each of the current reference picture and the co-located reference picture is a short-term reference picture.

公开(公告)号：US20190261013A1

公开(公告)日：2019-08-22

申请号：US16399082

申请日：2019-04-30

Applicant: Sun Patent Trust

Inventor： Kengo TERADA ,  Takahiro NISHI ,  Hisao SASAI

IPC: H04N19/503 ,  H04N19/16 ,  H04N19/159 ,  H04N19/31 ,  H04N19/172 ,  H04N19/105 ,  H04N19/187

Abstract: An image encoding method includes: determining whether a current picture is a TSA picture or a trailing picture; and encoding a plurality of pictures according to whether the current picture is the TSA picture or a trailing picture. The determining includes: determining the current picture to be the TSA picture when the current picture does not belong to the highest layer and corresponds to a first field, and determining the current picture to be the trailing picture when the current picture belongs to the highest layer or corresponds to a second field.

公开(公告)号：US20190238876A1

公开(公告)日：2019-08-01

申请号：US16381253

申请日：2019-04-11

Applicant: Sun Patent Trust

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

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

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：US20190238844A1

公开(公告)日：2019-08-01

申请号：US16377874

申请日：2019-04-08

Applicant: Sun Patent Trust

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

IPC: H04N19/115 ,  H04N19/172 ,  H04N19/103 ,  H04N19/52 ,  H04N19/176 ,  H04N19/146 ,  H04N19/51

CPC classification number: H04N19/115 ,  H04N19/103 ,  H04N19/146 ,  H04N19/172 ,  H04N19/176 ,  H04N19/51 ,  H04N19/52

Abstract: An image coding method includes: generating a first flag indicating whether or not a motion vector predictor is to be selected from among one or more motion vector predictor candidates; generating a second flag indicating whether or not a motion vector predictor is to be selected from among the one or more motion vector predictor candidates in coding a current block to be coded in a predetermined coding mode, when the first flag indicates that a motion vector predictor is to be selected; and generating a coded signal in which the first flag and the second flag are included in header information, when the first flag indicates that a motion vector predictor is to be selected.

公开(公告)号：US20190174147A1

公开(公告)日：2019-06-06

申请号：US16266339

申请日：2019-02-04

Applicant: Sun Patent Trust

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

IPC: H04N19/91 ,  H04N19/174 ,  H04N19/436 ,  H04N19/70 ,  H04N19/13 ,  H04N19/136

CPC classification number: H04N19/91 ,  H04N19/13 ,  H04N19/136 ,  H04N19/174 ,  H04N19/436 ,  H04N19/70

Abstract: An image decoding method of decoding, on a per-block basis, a coded image included in a bitstream, includes: performing arithmetic decoding on a current block to be decoded; determining whether or not the current block is at the end of a slice; determining, when it is determined that the current block is not at the end of the slice, whether or not the current block is at the end of a sub-stream which is a structural unit of the image that is different from the slice; and performing arithmetic decoding on a sub-last bit and performing arithmetic decoding termination, when it is determined that the current block is at the end of the sub-stream.

公开(公告)号：US20190141344A1

公开(公告)日：2019-05-09

申请号：US16236858

申请日：2018-12-31

Applicant: Sun Patent Trust

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

IPC: H04N19/51 ,  H04N19/46 ,  H04N19/172 ,  H04N19/90 ,  H04N19/105 ,  H04N19/159

Abstract: A moving picture coding method includes: making a determination as to whether or not to code all blocks in a current picture in the skip mode; setting, based on a result of the determination, a first flag indicating whether or not a temporally neighboring block is to be referenced, a value of a parameter for determining a total number of merging candidates, and a second flag for each block included in the current picture, the second flag indicating whether or not the block is to be coded in the skip mode; calculating, as a merging candidate, a neighboring block usable for merging; and coding an index which indicates a merging candidate to be used for coding of the current block and attaching the coded index to a bitstream.

公开(公告)号：US20190132607A1

公开(公告)日：2019-05-02

申请号：US16232441

申请日：2018-12-26

Applicant: Sun Patent Trust

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

IPC: H04N19/513 ,  H04N19/577 ,  H04N19/503 ,  H04N19/56 ,  H04N19/105 ,  H04N19/573 ,  H04N19/52

Abstract: By the moving picture coding method and the moving picture decoding method, it is possible to improve coding efficiency. The moving picture coding apparatus includes a merge block candidate calculation unit that (i) specifies merge block candidates at merge mode, by using colpic information such as motion vectors and reference picture index values of neighbor blocks of a current block to be coded and a motion vector and the like of a collocated block of the current block which are stored in a colPic memory, and (ii) generates a combined merge block by using the merge block candidates.

公开(公告)号：US20190116377A1

公开(公告)日：2019-04-18

申请号：US16217590

申请日：2018-12-12

Applicant: Sun Patent Trust

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

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

Abstract: A moving picture decoding apparatus, method, and medium for decoding a current block are provided. A first candidate is derived from a first motion vector that has been used to decode a first block. The first block is adjacent to the current block. A second candidate having a second motion vector that is one of a zero vector or a non-zero value vector is derived. The second motion vector is not derived by decoding a block adjacent to the current block. A candidate is selected from a plurality of candidates, including the first candidate and the second candidate. The current block is decoded using the selected candidate.