公开(公告)号：US20230345002A1

公开(公告)日：2023-10-26

申请号：US18202035

申请日：2023-05-25

Applicant: Sun Patent Trust

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

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

CPC classification number: H04N19/124 ,  G06T9/00 ,  G06T9/005 ,  G06T9/007 ,  G06T9/008 ,  H04N19/13 ,  H04N19/134 ,  H04N19/17 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/436 ,  H04N19/46 ,  H04N19/503 ,  H04N19/51 ,  H04N19/593 ,  H04N19/60 ,  H04N19/70

Abstract: A processor obtains pieces of coded data, which are included in a bitstream and generated by coding tiles, and tile boundary independence information, which indicates whether each boundary between the tiles is a first or second boundary. 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 a 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 when the tile boundary independence information indicates the second boundary. A bit string is added after the first code string to make a bit length of first coded data a multiple of a predetermined N bits, with N being an integer greater than or equal to 2.

公开(公告)号：US20230336726A1

公开(公告)日：2023-10-19

申请号：US18213979

申请日：2023-06-26

Applicant: Sun Patent Trust

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

IPC: H04N19/124 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/46 ,  H04N19/61 ,  H04N19/12 ,  H04N19/44 ,  H04N19/42

CPC classification number: H04N19/124 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/46 ,  H04N19/61 ,  H04N19/12 ,  H04N19/44 ,  H04N19/42

Abstract: An image decoding method which can improve both image quality and coding efficiency is an image decoding method for decoding a coded stream which includes a plurality of processing units and a header for the processing units, the coded stream being generated by coding a moving picture, the processing units including at least one processing unit layered to be split into a plurality of smaller processing units, the image decoding method including specifying a hierarchical layer having a processing unit in which a parameter necessary for decoding is stored, by parsing hierarchy depth information stored in the header, and decoding the processing unit using the parameter stored in the processing unit located at the specified hierarchical layer.

公开(公告)号：US20230328254A1

公开(公告)日：2023-10-12

申请号：US18203709

申请日：2023-05-31

Applicant: Sun Patent Trust

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

IPC: H04N19/139 ,  H04N19/52 ,  H04N19/15 ,  H04N19/567 ,  H04N19/44 ,  H04N7/00 ,  H04N19/176 ,  H04N19/124 ,  H04N19/159 ,  H04N19/105 ,  H04N19/593 ,  H04N19/51 ,  H04N19/137 ,  H04N19/61 ,  H04N19/503 ,  H04N19/513 ,  H04N19/56 ,  H04N19/13

CPC classification number: H04N19/139 ,  H04N7/00 ,  H04N19/105 ,  H04N19/124 ,  H04N19/13 ,  H04N19/137 ,  H04N19/15 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/56 ,  H04N19/567 ,  H04N19/593 ,  H04N19/61 ,  H04N19/172

Abstract: A moving picture coding apparatus includes an intra-inter prediction unit which calculates a second motion vector by performing a scaling process on a first motion vector of a temporally neighboring corresponding block, when selectively adding, to a list, a motion vector of each of one or more corresponding blocks each of which is either a block included in a current picture to be coded and spatially neighboring a current block to be coded or a block included in a picture other than the current picture and temporally neighboring the current block, determines whether the second motion vector has a magnitude that is within a predetermined magnitude or not within the predetermined magnitude, and adds the second motion vector to the list when the intra-inter prediction unit determines that the second motion vector has a magnitude that is within the predetermined magnitude range.

公开(公告)号：US20230283781A1

公开(公告)日：2023-09-07

申请号：US17991156

申请日：2022-11-21

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

CPC classification number: 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：US20230239488A1

公开(公告)日：2023-07-27

申请号：US18130028

申请日：2023-04-03

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

CPC classification number: 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：US20230239484A1

公开(公告)日：2023-07-27

申请号：US18127832

申请日：2023-03-29

Applicant: Sun Patent Trust

Inventor： Kengo TERADA ,  Takahiro NISHI ,  Hisao SASAI

IPC: H04N19/31 ,  H04N21/845 ,  H04N19/70 ,  H04N19/46 ,  H04N19/587

CPC classification number: H04N19/31 ,  H04N21/845 ,  H04N19/70 ,  H04N19/46 ,  H04N19/587

Abstract: An image coding method of hierarchically coding a plurality of pictures to generate a bitstream, includes: coding each of the plurality of pictures, which belongs to any one of a plurality of hierarchical layers, with reference to a picture belonging to a hierarchical layer which is same as or lower than a hierarchical layer to which the picture belongs, and without reference to a picture belonging to a hierarchical layer which is higher than the hierarchical layer to which the picture belongs; and generating the bitstream by coding the coded pictures and time information indicating decoding times of the coded pictures. The time information indicates that the decoding times are set at equal intervals for low-layer pictures which are the plurality of pictures other than highest-layer pictures belonging to a highest layer among the plurality of hierarchical layers.

公开(公告)号：US20230224491A1

公开(公告)日：2023-07-13

申请号：US18114371

申请日：2023-02-27

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 ,  H04N19/513 ,  H04N19/52

CPC classification number: H04N19/527 ,  H04N19/58 ,  H04N19/513 ,  H04N19/52

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：US20230224480A1

公开(公告)日：2023-07-13

申请号：US18124769

申请日：2023-03-22

Applicant: Sun Patent Trust

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

IPC: H04N19/52 ,  H04N19/172 ,  H04N19/176 ,  H04N19/139 ,  H04N19/105 ,  H04N19/573

CPC classification number: H04N19/52 ,  H04N19/172 ,  H04N19/176 ,  H04N19/139 ,  H04N19/105 ,  H04N19/573

Abstract: A picture coding method includes: performing a first derivation process for deriving a first merging candidate which includes a candidate set of a prediction direction, a motion vector, and a reference picture index for use in coding of a current block;
performing a second derivation process for deriving a second merging candidate; selecting a merging candidate to be used in the coding of the current block from among the first and second merging candidates; and attaching an index for identifying the selected merging candidate to the bitstream; wherein the first derivation process is performed so that a total number of the first merging candidates does not exceed a predetermined number, and the second derivation process is performed when the total number of the first merging candidates is less than a predetermined maximum number of merging candidates.

公开(公告)号：US20230140985A1

公开(公告)日：2023-05-11

申请号：US18089761

申请日：2022-12-28

Applicant: Sun Patent Trust

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

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/503

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/503 ,  H04N19/172

Abstract: A moving picture coding includes: coding a first flag indicating whether or not temporal motion vector prediction is used; when the first flag indicates that the temporal motion vector prediction is used: coding a first parameter for calculating the temporal predictive motion vector; wherein when the first flag indicates that the temporal motion vector prediction is not used, the first parameter is not coded.

公开(公告)号：US20230071921A1

公开(公告)日：2023-03-09

申请号：US17987097

申请日：2022-11-15

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.