公开(公告)号：US20190327495A1

公开(公告)日：2019-10-24

申请号：US16456407

申请日：2019-06-28

Applicant: Sun Patent Trust

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

IPC: H04N19/96 ,  H04N19/463 ,  H04N19/19 ,  H04N19/119 ,  H04N19/61 ,  H04N19/147 ,  H04N19/70

Abstract: Provided is an image coding method that partitions an input image signal into processing units, and that codes the partitioned image to generate a code sequence. In particular, the image coding method determines a partitioning pattern for hierarchically partitioning the input image signal in order starting from a largest unit of the processing units, generates partition information indicative of the partitioning pattern, and codes partition information. The partition information includes maximum used hierarchy depth information indicative of a maximum used hierarchy depth which is a hierarchy depth of a deepest processing unit of the processing units included in the partitioning pattern.

公开(公告)号：US20190320176A1

公开(公告)日：2019-10-17

申请号：US16452842

申请日：2019-06-26

Applicant: Sun Patent Trust

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

IPC: H04N19/13 ,  H04N19/583 ,  H04N19/196 ,  H04N19/176 ,  H04N19/139 ,  H04N19/70 ,  H04N19/136 ,  H04N19/91 ,  H04N19/103 ,  H04N19/105

Abstract: The image coding method includes: determining a context in a current block in the image, from among a plurality of contexts; and performing arithmetic coding on the control parameter for the current block to generate a bitstream corresponding to the current block, 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 (i) “merge_flag”, (ii) “ref_idx_l0” or “ref_idx_l1”, (iii) “inter_pred_flag”, (iv) “mvd_l0” or “mvd_l1”, (v) “no_residual_data_flag”, (vi) “intra_chroma_pred_mode”, (vii) “cbf_luma”, and (viii) “cbf_cb” or “cbf_cr”.

公开(公告)号：US20190230351A1

公开(公告)日：2019-07-25

申请号：US16375127

申请日：2019-04-04

Applicant: Sun Patent Trust

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

IPC: H04N19/105 ,  H04N19/463 ,  H04N19/91 ,  H04N19/132 ,  H04N19/70

Abstract: A moving picture coding method includes: performing context adaptive binary arithmetic coding in which a variable probability value is used, on first information among multiple types of sample adaptive offset (SAO) information used for SAO that is a process of assigning an offset value to a pixel value of a pixel included in an image generated by coding the input image; and continuously performing bypass arithmetic coding in which a fixed probability value is used, on second information and third information among the multiple types of the SAO information, wherein the coded second and third information are placed after the coded first information in the bit stream.

公开(公告)号：US20190182510A1

公开(公告)日：2019-06-13

申请号：US16266638

申请日：2019-02-04

Applicant: Sun Patent Trust

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

IPC: H04N19/91 ,  H04N19/13 ,  H04N19/196 ,  H04N19/70 ,  H04N19/157 ,  H04N19/593 ,  H04N19/186 ,  H04N19/103 ,  H04N19/176

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 “intra_chroma_pred_mode”.

公开(公告)号：US20190166381A1

公开(公告)日：2019-05-30

申请号：US16262351

申请日：2019-01-30

Applicant: Sun Patent Trust

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

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

CPC classification number: H04N19/513 ,  H04N19/176 ,  H04N19/44 ,  H04N19/51 ,  H04N19/52 ,  H04N19/573

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：US20190166364A1

公开(公告)日：2019-05-30

申请号：US16263463

申请日：2019-01-31

Applicant: Sun Patent Trust

Inventor： Hisao SASAI ,  Takahiro NISHI ,  Youji SHIBAHARA

IPC: H04N19/117 ,  H04N19/513 ,  H04N19/86 ,  H04N19/176 ,  H04N19/122 ,  H04N19/18

CPC classification number: H04N19/117 ,  H04N19/122 ,  H04N19/176 ,  H04N19/18 ,  H04N19/513 ,  H04N19/86

Abstract: An image coding method for coding an input image per block to generate a coded image signal includes: predicting for each prediction unit which is an area obtained by partitioning a target block to generate a prediction image of the target block; comparing a transform unit which is an area obtained by partitioning the target block and is a processing unit for frequency transform with the prediction unit, to detect part of a boundary of the prediction unit, the boundary being located within the transform unit; performing boundary filtering on the detected part of the boundary in the generated prediction image; calculating a difference between a filtered prediction image and the input image to generate a difference image of the target block; and performing frequency transform on the difference image for each transform unit.

公开(公告)号：US20190124335A1

公开(公告)日：2019-04-25

申请号：US16224059

申请日：2018-12-18

Applicant: Sun Patent Trust

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

IPC: H04N19/139 ,  H04N19/577 ,  H04N19/102 ,  H04N19/134 ,  H04N19/13 ,  H04N19/51 ,  H04N19/70 ,  H04N19/105 ,  H04N19/176 ,  H04N19/52

Abstract: An image decoding apparatus, method, and medium for decoding a current block included in a bitstream are provided. A first candidate, having a first motion vector that has been used to decode a first block, is searched for from one or more candidates. The first block is spatially or temporally adjacent to the current block. Two or more second candidates, each having a second motion vector being a zero vector, are derived when the first candidate is unavailable in the searching. A current block is decoded using derived candidates. The derived candidates include the two or more second candidates.

公开(公告)号：US20190075314A1

公开(公告)日：2019-03-07

申请号：US16183088

申请日：2018-11-07

Applicant: Sun Patent Trust

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

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/503 ,  H04N19/105 ,  H04N19/577 ,  H04N19/573 ,  H04N19/56 ,  H04N19/109 ,  H04N19/107 ,  H04N19/70

CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/107 ,  H04N19/109 ,  H04N19/503 ,  H04N19/52 ,  H04N19/56 ,  H04N19/573 ,  H04N19/577 ,  H04N19/70

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：US20190075300A1

公开(公告)日：2019-03-07

申请号：US16183241

申请日：2018-11-07

Applicant: Sun Patent Trust

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

IPC: H04N19/15 ,  H04N19/132 ,  H04N19/46 ,  G06T9/00 ,  H04N19/70 ,  H04N19/176 ,  H04N19/13 ,  H04N19/423

Abstract: An encoding method of encoding units included in a picture is provided. The encoding method generates a first flag indicating whether a removal time of encoded data from a buffer by a hypothetical decoder is set per unit. When the removal time is set per unit, a second flag is generated which indicates whether an interval between removal times of the units is constant. When the second flag indicates that the interval is constant, common-interval information is generated which is distinct from the second flag and indicates a constant time interval between the removal times of the units. A bitstream including the encoded data, the first flag, the second flag, and the common-interval information is generated. The first flag is included in video usability information of the bitstream. The second flag and the common-interval information are included in control information of the bitstream.

公开(公告)号：US20180352234A1

公开(公告)日：2018-12-06

申请号：US16058204

申请日：2018-08-08

Applicant: Sun Patent Trust

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

IPC: H04N19/13 ,  H03M7/40 ,  H04N19/167 ,  H04N19/18

CPC classification number: H04N19/13 ,  H03M7/4018 ,  H04N19/167 ,  H04N19/18

Abstract: An image coding method for coding image data on a block-by-block basis includes: segmenting a block including coefficients of frequency components, into groups corresponding to frequency ranges based on types of the coefficients, and determining a context corresponding to each of the groups; performing, for each of the coefficients, binary arithmetic coding on the coefficient according to a probability information item corresponding to the context, the context being corresponding to the group having the coefficient; and updating, for each of probability information items, the probability information item corresponding to the context, based on the coefficient included in the group corresponding to the context, wherein in the segmenting, the block is segmented into the groups with various numbers of coefficients.