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.

公开(公告)号：US20200244974A1

公开(公告)日：2020-07-30

申请号：US16852671

申请日：2020-04-20

Applicant: Sun Patent Trust

Inventor： Chong Soon LIM ,  Viktor WAHADANIAH ,  Sue Mon Thet NAING ,  Hisao SASAI ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Toshiyasu SUGIO

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/196 ,  H04N19/61 ,  H04N19/126 ,  H04N19/157 ,  H04N19/50 ,  H04N19/172

Abstract: A method of encoding an image into a coded image, the method comprising: writing a quantization offset parameter into the coded image, determining a prediction mode type for coding a block of image samples of the image into a coding unit of the coded image, determining a quantization parameter for the block of image samples, and determining if the prediction mode type is of a predetermined type, wherein if the prediction mode type is of the predetermined type, the method further comprises: modifying the determined quantization parameter using the quantization offset parameter, and performing a quantization process for the block of image samples using the modified quantization parameter, and wherein if the prediction mode type is not of the predetermined type, the method further comprises: performing a quantization process for the block of image samples using the determined quantization parameter.

公开(公告)号：US20200154133A1

公开(公告)日：2020-05-14

申请号：US16738322

申请日：2020-01-09

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：US20200045320A1

公开(公告)日：2020-02-06

申请号：US16599417

申请日：2019-10-11

Applicant: Sun Patent Trust

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

IPC: H04N19/16 ,  H04N19/463 ,  H04N19/11 ,  H04N19/176 ,  H04N19/196

Abstract: An image decoding method of decoding, on a block-by-block basis, image data included in a coded stream includes: deriving candidates for an intra prediction mode to be used for intra prediction for a decoding target block, the number of the candidates constantly being a plural number; obtaining, from the coded stream, an index for identifying one of the derived candidates for the intra prediction mode; and determining, based on the obtained index, one of the derived candidates for the intra prediction mode as the intra prediction mode to be used for intra prediction for the decoding target block.

公开(公告)号：US20190335198A1

公开(公告)日：2019-10-31

申请号：US16507457

申请日：2019-07-10

Applicant: Sun Patent Trust

Inventor： Viktor WAHADANIAH ,  Chong Soon LIM ,  Sue Mon Thet NAING ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Hisao SASAI ,  Toshiyasu SUGIO

IPC: H04N19/573 ,  H04N19/593 ,  H04N19/65 ,  H04N19/31 ,  H04N19/159 ,  H04N19/70

Abstract: A video encoding method using a plurality of reference pictures includes: selecting whether or not a resilient picture referencing scheme is to be used for encoding video; writing a parameter indicating the selection into a header of an encoded video bitstream; and encoding a picture using inter-picture prediction using a result of the selection.