公开(公告)号：US20210044834A1

公开(公告)日：2021-02-11

申请号：US16988231

申请日：2020-08-07

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya LI ,  Han Boon TEO ,  Chong Soon LIM ,  Hai Wei SUN ,  Che-Wei KUO ,  Chu Tong WANG ,  Tadamasa TOMA ,  Takahiro NISHI ,  Kiyofumi ABE ,  Yusuke KATO

IPC: H04N19/82 ,  H04N19/107 ,  H04N19/186 ,  H04N19/176

Abstract: A decoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation, generates a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to a first reconstructed image sample of a luma component, and clips the first coefficient value. The circuitry generates a second coefficient value by applying an ALF (adaptive loop filtering) process to a second reconstructed image sample of a chroma component, and clips the second coefficient value. The circuitry generates a third coefficient value by adding the clipped first coefficient value to the clipped second coefficient value, and decodes a third reconstructed image sample of the chroma component using the third coefficient value.

公开(公告)号：US20200336760A1

公开(公告)日：2020-10-22

申请号：US16922369

申请日：2020-07-07

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kiyofumi ABE ,  Takahiro NISHI ,  Tadamasa TOMA ,  Ryuichi KANOH ,  Chong Soon LIM ,  Ru Ling LIAO ,  Hai Wei SUN ,  Sughosh Pavan SHASHIDHAR ,  Han Boon TEO ,  Jing Ya LI

IPC: H04N19/533 ,  H04N19/557

Abstract: An encoder which includes circuitry and memory is provided. The circuitry: calculates a cost for each of search points included in a first set; determines whether a base search point has a lowest cost in the first set; when the cost of the base search points is lowest, selects the base search point as a first best search point; when the cost of the base search points is not lowest, calculates a cost for each of search points included in a second set, selects a search point having a lowest cost from among the first set and the second set, as a second best search point, and encodes a current block to be encoded, using a motion vector corresponding to the first best search point or the second best search point.

公开(公告)号：US20200084452A1

公开(公告)日：2020-03-12

申请号：US16562281

申请日：2019-09-05

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Ru Ling LIAO ,  Chong Soon LIM ,  Hai Wei SUN ,  Han Boon TEO ,  Jing Ya LI ,  Kiyofumi ABE ,  Takahiro NISHI ,  Tadamasa TOMA

IPC: H04N19/137 ,  H04N19/159 ,  H04N19/119 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

Abstract: An image encoder or decoder includes circuitry and a memory coupled to the circuitry. The circuitry, in operation, predicts a first set of samples for a first partition of a current picture with one or more motion vectors including a first motion vector and predicts a second set of samples for a first portion of the first partition with one or more motion vectors from a second partition different from the first partition. The samples of the first set of samples of the first portion of the first partition and of the second set of samples of the first portion of the first partition are weighted. A motion vector for the first portion of the first partition is stored which is based on one or both of the first motion vector and the second motion vector. The first partition is encoded or decoded using at least the weighted samples of the first portion of the first partition.

公开(公告)号：US20200029087A1

公开(公告)日：2020-01-23

申请号：US16513586

申请日：2019-07-16

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Chong Soon LIM ,  Sughosh Pavan SHASHIDHAR ,  Ru Ling LIAO ,  Hai Wei SUN ,  Han Boon TEO ,  Jing Ya LI ,  Kiyofumi ABE ,  Tadamasa TOMA ,  Takahiro NISHI

IPC: H04N19/44 ,  H04N19/137 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176

Abstract: An image decoder has circuitry coupled to a memory. The circuitry splits a current image block into a plurality of partitions. The circuitry predicts a first motion vector from a set of uni-prediction motion vector candidates for a first partition of the plurality of partitions, and decodes the first partition using the first motion vector.

公开(公告)号：US20190335181A1

公开(公告)日：2019-10-31

申请号：US16394225

申请日：2019-04-25

Applicant: Panasonic Intellectual Property Corporation Of America

Inventor： Kiyofumi ABE ,  Takahiro NISHI ,  Tadamasa TOMA ,  Ryuichi KANOH ,  Chong Soon LIM ,  Ru Ling LIAO ,  Hai Wei SUN ,  Sughosh Pavan SHASHIDHAR ,  Han Boon TEO ,  Jing Ya LI

IPC: H04N19/159 ,  H04N19/119 ,  H04N19/139 ,  H04N19/513

Abstract: An encoder encodes a video, and includes: circuitry; and memory coupled to the circuitry. Using the memory, the circuitry: obtains at least two items of prediction information for a first partition included in the video; derives at least one template from neighboring samples which neighbor the first partition; calculates at least two costs, using the at least one template and the at least two items of prediction information; using the at least two costs, (i) determines at least one splitting direction for the first partition or (ii) assigns one of the at least two items of prediction information to a second partition split from the first partition according to the splitting direction, and another thereof to a third partition split from the first partition according to the splitting direction; and encodes the first partition according to the splitting direction and the at least two items of prediction information.

公开(公告)号：US20250097477A1

公开(公告)日：2025-03-20

申请号：US18970520

申请日：2024-12-05

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya LI ,  Chong Soon LIM ,  Han Boon TEO ,  Hai Wei SUN ,  Che-Wei KUO ,  Chu Tong WANG ,  Tadamasa TOMA ,  Takahiro NISHI ,  Kiyofumi ABE ,  Yusuke KATO

IPC: H04N19/82 ,  H04N19/105 ,  H04N19/109 ,  H04N19/11 ,  H04N19/117 ,  H04N19/119 ,  H04N19/12 ,  H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/61

Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation, generates a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to a first reconstructed image sample of a luma component, and generates a second coefficient value by applying an ALF (adaptive loop filtering) process to a second reconstructed image sample of a chroma component. The circuitry modifies the first coefficient value by performing an arithmetic right shift by 7 bits on the first coefficient value. The circuitry generates a third coefficient value by adding the modified first coefficient value to the second coefficient value, and encodes a third reconstructed image sample of the chroma component using the third coefficient value.

公开(公告)号：US20240323405A1

公开(公告)日：2024-09-26

申请号：US18670936

申请日：2024-05-22

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kiyofumi ABE ,  Takahiro NISHI ,  Tadamasa TOMA ,  Ryuichi KANOH ,  Chong Soon LIM ,  Ru Ling LIAO ,  Hai Wei SUN ,  Sughosh Pavan SHASHIDHAR ,  Han Boon TEO ,  Jing Ya LI

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/52 ,  H04N19/70

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/52 ,  H04N19/70

Abstract: An encoder, includes: circuitry; and memory. Using the memory, the circuitry: in inter prediction for a current block, determines a base motion vector, and writes, in an encoded signal, a delta motion vector representing (i) one direction among a plurality of directions including a diagonal direction and (ii) a distance from the base motion vector; and encodes the current block using the delta motion vector and the base motion vector as a motion vector of the current block.

公开(公告)号：US20240323400A1

公开(公告)日：2024-09-26

申请号：US18679122

申请日：2024-05-30

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya LI ,  Chong Soon LIM ,  Han Boon TEO ,  Hai Wei SUN ,  Che Wei KUO ,  Kiyofumi ABE ,  Takahiro NISHI ,  Tadamasa TOMA ,  Yusuke KATO

IPC: H04N19/159 ,  H04N19/126 ,  H04N19/156 ,  H04N19/18 ,  H04N19/52 ,  H04N19/61

CPC classification number: H04N19/159 ,  H04N19/126 ,  H04N19/156 ,  H04N19/18 ,  H04N19/52 ,  H04N19/61

Abstract: An image encoder is provided including circuitry and a memory coupled to the circuitry. The circuitry, in operation, responds to a size of a block satisfying a size condition by generating a prediction image using a prediction mode selected from a plurality of prediction modes. The plurality of prediction modes include a first prediction mode in which a prediction process uses a motion vector and a reference block in a same picture as the block. The circuitry encodes the block using the prediction image.

公开(公告)号：US20240276022A1

公开(公告)日：2024-08-15

申请号：US18642343

申请日：2024-04-22

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Che-Wei KUO ,  Chong Soon LIM ,  Jing Ya LI ,  Han Boon TEO ,  Hai Wei SUN ,  Chu Tong WANG ,  Tadamasa TOMA ,  Takahiro NISHI ,  Kiyofumi ABE ,  Yusuke KATO

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/119 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/593 ,  H04N19/61 ,  H04N19/96

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/119 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/593 ,  H04N19/61 ,  H04N19/96

Abstract: An encoder includes circuitry and memory. The circuitry, in operation, generates a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to a first reconstructed image sample of a luma component. The circuitry generates a second coefficient value by applying an ALF (adaptive loop filtering) process to a second reconstructed image sample of a chroma component. The circuitry generates a third coefficient value by adding the first coefficient value to the second coefficient value, and encodes a third reconstructed image sample of the chroma component using the third coefficient value. The circuitry determines a first parameter having the same value for Cb component and Cr component of the chroma component. The circuitry determines, using the first parameter, a model of entropy coding from a plurality of models. The circuitry performs, using the model, the entropy coding of a second parameter of the CCALF process.

公开(公告)号：US20240276021A1

公开(公告)日：2024-08-15

申请号：US18638249

申请日：2024-04-17

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Chu Tong WANG ,  Chong Soon LIM ,  Han Boon TEO ,  Hai Wei SUN ,  Jing Ya LI ,  Che-Wei KUO ,  Tadamasa TOMA ,  Takahiro NISHI ,  Kiyofumi ABE ,  Yusuke KATO

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/132 ,  H04N19/167 ,  H04N19/17 ,  H04N19/186

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/132 ,  H04N19/167 ,  H04N19/17 ,  H04N19/186

Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in response to a first reconstructed image sample being located outside a virtual boundary, duplicates a reconstructed sample located inside and adjacent to the virtual boundary to generate the first reconstructed image sample. The circuitry generates a first coefficient value by applying a CCALF (cross component adaptive loop filtering) process to the first reconstructed image sample of a luma component. The circuitry generates a second coefficient value by applying an ALF (adaptive loop filtering) process to a second reconstructed image sample of a chroma component. The circuitry generates a third coefficient value by adding the first coefficient value to the second coefficient value, and encodes a third reconstructed image sample of the chroma component using the third coefficient value.