公开(公告)号：US20210243448A1

公开(公告)日：2021-08-05

申请号：US17234974

申请日：2021-04-20

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 ,  H04N19/573 ,  H04N19/58 ,  H04N19/44 ,  H04N19/105 ,  H04N19/70 ,  H04N19/172 ,  H04N19/174 ,  H04N19/42 ,  H04N19/115 ,  H04N19/119 ,  H04N19/136 ,  H04N19/423

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.

公开(公告)号：US20210144396A1

公开(公告)日：2021-05-13

申请号：US17152042

申请日：2021-01-19

Applicant: Sun Patent Trust

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

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

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：US20210120263A1

公开(公告)日：2021-04-22

申请号：US17137675

申请日：2020-12-30

Applicant: Sun Patent Trust

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

IPC: H04N19/513 ,  H04N19/597 ,  H04N19/52 ,  H04N19/51 ,  H04N19/577 ,  H04N19/527 ,  H04N19/176 ,  H04N19/44 ,  H04N19/159 ,  H04N19/503

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：US20210099714A1

公开(公告)日：2021-04-01

申请号：US17122447

申请日：2020-12-15

Applicant: Sun Patent Trust

Inventor： Kengo TERADA ,  Takahiro NISHI ,  Hisao SASAI ,  Satoshi YOSHIKAWA

IPC: H04N19/146 ,  H04N19/132 ,  H04N19/156 ,  H04N19/187 ,  H04N19/31 ,  H04N19/30 ,  H04N19/105 ,  H04N19/154 ,  H04N19/184

Abstract: A video encoding method of performing scalable encoding on input video includes: determining a total number of layers of the scalable encoding to be less than or equal to a maximum layer count determined according to a frame rate; and performing the scalable encoding on the input video to generate a bitstream, using the determined total number of layers.

公开(公告)号：US20210092440A1

公开(公告)日：2021-03-25

申请号：US17116338

申请日：2020-12-09

Applicant: Sun Patent Trust

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

IPC: H04N19/56 ,  H04N19/52 ,  H04N19/51 ,  H04N19/58 ,  H04N19/513 ,  H04N19/172 ,  H04N19/176

Abstract: An image coding method includes: deriving a candidate for a motion vector predictor from a co-located motion vector; adding the candidate to a list; selecting the motion vector predictor from the list; and coding a current block and coding a current motion vector, 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：US20210006813A1

公开(公告)日：2021-01-07

申请号：US17027839

申请日：2020-09-22

Applicant: Sun Patent Trust

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

IPC: H04N19/50 ,  H04N19/176 ,  H04N19/70 ,  H04N19/61 ,  H04N19/91 ,  H04N19/196 ,  H04N19/157 ,  H04N19/13 ,  H04N19/436 ,  H04N19/85

Abstract: A moving picture coding method includes (i) transforming, for each of one or more second processing units included in the first processing unit, a moving picture signal in a spatial domain into a frequency domain coefficient and quantizing the frequency domain coefficient, and (ii) performing arithmetic coding on a luminance CBF flag indicating whether or not a quantized coefficient is included in the second processing unit in which transform and quantization are performed, wherein, in the arithmetic coding, a probability table for use in arithmetic coding is determined according to whether or not the size of the first processing unit is identical to the size of the second processing unit and whether or not the second processing unit has a predetermined maximum size.

公开(公告)号：US20200351514A1

公开(公告)日：2020-11-05

申请号：US16934590

申请日：2020-07-21

Applicant: Sun Patent Trust

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

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/51 ,  H04N19/573 ,  H04N19/176 ,  H04N19/44

Abstract: A moving picture coding method includes: coding, using a motion vector, a current block to be coded; generating a plurality of predictive motion vectors; and coding the motion vector using one of the predictive motion vectors, and when a co-located block included in a coded picture and co-located with the current block has two reference motion vectors and reference directions of the two reference motion vectors are the same, a first prediction vector is generated using a first reference motion vector and a second prediction vector is generated using a second reference motion vector in the generating of a plurality of predictive motion vectors.

公开(公告)号：US20200304793A1

公开(公告)日：2020-09-24

申请号：US16897938

申请日：2020-06-10

Applicant: Sun Patent Trust

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

IPC: H04N19/124 ,  H04N19/46 ,  H04N19/13 ,  H04N19/134 ,  H04N19/436 ,  H04N19/503 ,  H04N19/176 ,  H04N19/70 ,  H04N19/172 ,  H04N19/51 ,  H04N19/60 ,  H04N19/593 ,  H04N19/174 ,  H04N19/17 ,  G06T9/00

Abstract: Circuity for executing operations is provided. The operations obtain pieces of coded data that is included in a bitstream and generated by coding tiles. The pieces of coded data are decoded to generate image data of the tiles. When the pieces of coded data are obtained, tile boundary independence information is further obtained, which indicates whether each of boundaries between the tiles is one of a first boundary and a second boundary. When the pieces of coded data are decoded, image data of a first tile is generated by decoding a first code string included in first coded data with reference to decoding information of an already-decoded tile when the tile boundary independence information indicates the first boundary, and by decoding the first code string without referring to the decoding information of the already-decoded tile when the tile boundary independence information indicates the second boundary.

公开(公告)号：US20200288148A1

公开(公告)日：2020-09-10

申请号：US16880199

申请日：2020-05-21

Applicant: Sun Patent Trust

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

IPC: H04N19/174 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/127 ,  H04N19/44 ,  H04N19/436

Abstract: An image encoding method including: a constraint information generating step of generating tile constraint information indicating whether or not there is a constraint in filtering on boundaries between adjacent tiles among a plurality of tiles obtained by dividing a picture, and storing the tile constraint information into a sequence parameter set; and a filter information generating step of generating, for each of the boundaries, one of a plurality of filter information items respectively indicating whether or not filtering is executed on the boundaries, and storing the plurality of filter information items into a plurality of picture parameter sets, wherein, in the filter information generating step, the plurality of filter information items which indicate identical content are generated when the tile constraint information indicates that there is the constraint in the filtering.

公开(公告)号：US20200244987A1

公开(公告)日：2020-07-30

申请号：US16852651

申请日：2020-04-20

Applicant: Sun Patent Trust

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

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/43 ,  H04N19/51 ,  H04N19/105 ,  H04N19/124 ,  H04N19/159 ,  H04N19/61

Abstract: A moving picture coding apparatus includes a co-located block information determination unit which determines which one of a forward reference block and a backward reference block will be a co-located block and further determines whether only the unidirectional motion vector of the motion vectors of the co-located block is to be stored in a colPic memory; a temporal motion vector predictor calculation unit which derives a candidate motion vector predictor in temporal motion vector predictor mode using the colPic information stored in the colPic memory; and an inter prediction control unit which determines to code a motion vector using a candidate motion vector predictor having least error from the motion vector derived by motion estimation among candidate motion vector predictors.