公开(公告)号：US20230033242A1

公开(公告)日：2023-02-02

申请号：US17966480

申请日：2022-10-14

Applicant: Sun Patent Trust

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

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

Abstract: A moving picture coding apparatus for coding a current block is provided. A first candidate is derived from a first motion vector that has been used to code a first block, and it is determined whether a total number of candidates including the first candidate is less than a maximum candidate number. A second candidate having a second motion vector is derived when the total number of the candidates is less than the maximum candidate number, with the second motion vector including a zero vector. A candidate is selected from a plurality of candidates including the first candidate and the second candidate, and the current block is decoded using the selected candidate.

公开(公告)号：US20220408102A1

公开(公告)日：2022-12-22

申请号：US17894682

申请日：2022-08-24

Applicant: Sun Patent Trust

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

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

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：US20220360809A1

公开(公告)日：2022-11-10

申请号：US17874468

申请日：2022-07-27

Applicant: Sun Patent Trust

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

IPC: H04N19/51 ,  H04N19/70 ,  H04N19/172 ,  H04N19/46 ,  H04N19/107 ,  H04N19/52 ,  H04N19/105

Abstract: An image coding method includes: selecting a first picture from plural pictures; setting a first temporal motion vector prediction flag which is associated with the first picture and is a temporal motion vector prediction flag indicating whether or not temporal motion vector prediction is to be used, to indicate that the temporal motion vector prediction is not to be used, and coding the first temporal motion vector prediction flag; coding the first picture without using the temporal motion vector prediction; and coding a second picture which follows the first picture in coding order, with referring to a motion vector of a picture preceding the first picture in coding order being prohibited.

公开(公告)号：US20220360808A1

公开(公告)日：2022-11-10

申请号：US17869021

申请日：2022-07-20

Applicant: Sun Patent Trust

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

IPC: H04N19/51 ,  H04N19/52 ,  H04N19/96 ,  H04N19/593 ,  H04N19/513

Abstract: An image decoding method includes: dividing a current block into sub-blocks; deriving, for each sub-block, one or more prediction information candidates; obtaining an index; and decoding the current block using the prediction information candidate selected by the index. The deriving includes: determining whether a neighboring block neighboring each sub-block is included in the current block, and when not included in the current block, determining the neighboring block to be a reference block available to the sub-block, and when included in the current block, determining the neighboring block not to be the reference block; and deriving a prediction information candidate of the sub-block from prediction information of the reference block; and when the number of prediction information candidates is smaller than a predetermined number, generating one or more new candidates without using the prediction information of the reference block till the number of prediction information candidates reaches the predetermined number.

公开(公告)号：US20220360807A1

公开(公告)日：2022-11-10

申请号：US17871170

申请日：2022-07-22

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：US20220353515A1

公开(公告)日：2022-11-03

申请号：US17862731

申请日：2022-07-12

Applicant: Sun Patent Trust

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

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

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：US20220321903A1

公开(公告)日：2022-10-06

申请号：US17846249

申请日：2022-06-22

Applicant: Sun Patent Trust

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

IPC: H04N19/50 ,  H04N19/31 ,  H04N19/423 ,  H04N19/172 ,  H04N19/174 ,  H04N19/187

Abstract: With an image coding method which allows reduction of processing loads, when pictures included in a video signal are classified into layers so as to belong to their respective layers, a picture that belongs to the second layer that is located in a range restricted according to the first layer to which a current picture to be coded that is one of the pictures belongs, is referred to as a reference picture for the current picture, and the current picture is coded based on the reference picture.

公开(公告)号：US20220256192A1

公开(公告)日：2022-08-11

申请号：US17731466

申请日：2022-04-28

Applicant: Sun Patent Trust

Inventor： Satoshi YOSHIKAWA ,  Hisao SASAI ,  Kengo TERADA

IPC: H04N19/61 ,  H04N19/127 ,  H04N19/157 ,  H04N19/44 ,  H04N19/42 ,  H04N19/537 ,  H04N19/557 ,  H04N19/547

Abstract: An image coding method includes selecting two or more transform components from among a plurality of transform components that include a translation component and non-translation components, the two or more transform components serving as reference information that represents a reference destination of a current block; coding selection information that identifies the two or more transform components that have been selected from among the plurality of transform components; and coding the reference information of the current block by using reference information of a coded block different from the current block.

公开(公告)号：US20220248049A1

公开(公告)日：2022-08-04

申请号：US17728050

申请日：2022-04-25

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：US20220191516A1

公开(公告)日：2022-06-16

申请号：US17682124

申请日：2022-02-28

Applicant: Sun Patent Trust

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

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/122 ,  H04N19/186 ,  G06T9/00 ,  H04N19/44 ,  H04N19/60 ,  H04N19/136

Abstract: An image coding method of coding an image on a per coding unit basis, the method comprising: applying a frequency transform to luminance data and chrominance data of transform units in the coding unit including predetermined blocks each corresponding to one or more of the transform units; and coding the luminance data and the chrominance data to which the frequency transform has been applied to generate a bitstream in which the luminance data and the chrominance data are grouped on a per predetermined block basis.