公开(公告)号：US12108073B2

公开(公告)日：2024-10-01

申请号：US18217840

申请日：2023-07-03

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya Li ,  Chong Soon Lim ,  Ru Ling Liao ,  Han Boon Teo ,  Hai Wei Sun ,  Che Wei Kuo ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma

IPC: H04N19/00 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/513 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

Abstract: Provided is an encoder including circuitry and memory coupled to the circuitry. A prediction mode for a current block is an affine mode, and in operation, the circuitry: derives a base motion vector which is a motion vector to be used in a prediction process for the current block, and is a motion vector at an affine-mode control point in the current block; derives a first motion vector different from the base motion vector; derives a motion vector difference based on a difference between the base motion vector and the first motion vector; determines whether the motion vector difference is greater than a threshold; if so, modifies a second motion vector different from the base motion vector and the first motion vector, and if not, does not modify the second motion vector; and encodes the current block using the second motion vector modified or the second motion vector not modified.

公开(公告)号：US12034974B2

公开(公告)日：2024-07-09

申请号：US17885740

申请日：2022-08-11

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Hai Wei Sun ,  Chong Soon Lim ,  Han Boon Teo ,  Jing Ya Li ,  Che Wei Kuo ,  Chu Tong Wang ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/132 ,  H04N19/186 ,  H04N19/80

CPC classification number: H04N19/70 ,  H04N19/124 ,  H04N19/132 ,  H04N19/186 ,  H04N19/80

Abstract: An encoder: includes circuitry, and memory coupled to the circuitry; stores a first parameter into a bitstream, the first parameter indicating whether a syntax element related to a chroma tool offset is present in the bitstream; when the first parameter indicates that the syntax element is present in the bitstream, (i) stores, in the bitstream, one or more second parameters that are used in deblocking filtering for a chroma sample of a current image, in addition to the syntax element, (ii) performs the deblocking filtering using the one or more second parameters, and (iii) encodes the current image; and when the first parameter indicates that the syntax element is not present in the bitstream, encodes the current image without storing the one or more second parameters into the bitstream.

公开(公告)号：US12034925B2

公开(公告)日：2024-07-09

申请号：US18071365

申请日：2022-11-29

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya Li ,  Chong Soon Lim ,  Hai Wei Sun ,  Han Boon Teo ,  Che Wei Kuo ,  Chu Tong Wang ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Yusuke Kato

IPC: H04N19/82 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119 ,  H04N19/124 ,  H04N19/13 ,  H04N19/18 ,  H04N19/186

CPC classification number: H04N19/117 ,  H04N19/105 ,  H04N19/119 ,  H04N19/124 ,  H04N19/13 ,  H04N19/18 ,  H04N19/186 ,  H04N19/82

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. In the CCALF process, in response to a coordinate of the second reconstructed image sample being (x, y), coordinates of the first reconstructed image samples are (2x, 2y−1), (2x−1, 2y), (2x, 2y), (2x+1, 2y), (2x−1, 2y+1), (2x, 2y+1), (2x+1, 2y+1), and (2x, 2y+2).

公开(公告)号：US12022063B2

公开(公告)日：2024-06-25

申请号：US17332132

申请日：2021-05-27

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Ru Ling Liao ,  Chong Soon Lim ,  Jing Ya Li ,  Han Boon Teo ,  Hai Wei Sun ,  Che Wei Kuo ,  Yusuke Kato ,  Tadamasa Toma ,  Kiyofumi Abe ,  Takahiro Nishi

IPC: H04N19/107 ,  H04N19/176

CPC classification number: H04N19/107 ,  H04N19/176

Abstract: An image encoder includes: circuitry; and a memory coupled to the circuitry. The circuitry, in operation: calculates first values of a current block using intra prediction, the intra prediction being limited to planar mode, the planar mode using multiple reference pixels for each pixel location of the current block; calculates second values of the current block using inter prediction; calculates third values of the current block by weighting the first values and the second values; and encodes the current block using the third values, and in the calculating of the third values, a first weight is applied to the first values and a second weight is applied to the second values, the second weight being different from the first weight.

公开(公告)号：US11876959B2

公开(公告)日：2024-01-16

申请号：US17956093

申请日：2022-09-29

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya Li ,  Chong Soon Lim ,  Han Boon Teo ,  Che Wei Kuo ,  Hai Wei Sun ,  Chu Tong Wang ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Yusuke Kato

IPC: H04N19/14 ,  H04N19/159 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176

Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation: determines whether a size of a current block, which is a unit for which a vector candidate list including vector candidates is generated, is less than or equal to a threshold; when the size of the current block is less than or equal to the threshold, generates the vector candidate list by registering a history-based motion vector predictor (HMVP) vector candidate in the vector candidate list from an HMVP table without performing a first pruning process; when the size of the current block is greater than the threshold, generates the vector candidate list by performing the first pruning process and registering the HMVP vector candidate in the vector candidate list from the HMVP table; and encodes the current block using the vector candidate list.

公开(公告)号：US11743484B2

公开(公告)日：2023-08-29

申请号：US17864906

申请日：2022-07-14

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya Li ,  Chong Soon Lim ,  Ru Ling Liao ,  Han Boon Teo ,  Hai Wei Sun ,  Che Wei Kuo ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma

IPC: H04N19/00 ,  H04N19/513 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/513 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

Abstract: Provided is an encoder including circuitry and memory coupled to the circuitry. A prediction mode for a current block is an affine mode, and in operation, the circuitry: derives a base motion vector which is a motion vector to be used in a prediction process for the current block, and is a motion vector at an affine-mode control point in the current block; derives a first motion vector different from the base motion vector; derives a motion vector difference based on a difference between the base motion vector and the first motion vector; determines whether the motion vector difference is greater than a threshold; if so, modifies a second motion vector different from the base motion vector and the first motion vector, and if not, does not modify the second motion vector; and encodes the current block using the second motion vector modified or the second motion vector not modified.

公开(公告)号：US12028519B2

公开(公告)日：2024-07-02

申请号：US18071370

申请日：2022-11-29

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya Li ,  Chong Soon Lim ,  Hai Wei Sun ,  Han Boon Teo ,  Che Wei Kuo ,  Chu Tong Wang ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Yusuke Kato

IPC: H04N19/82 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119 ,  H04N19/124 ,  H04N19/13 ,  H04N19/18 ,  H04N19/186

CPC classification number: H04N19/117 ,  H04N19/105 ,  H04N19/119 ,  H04N19/124 ,  H04N19/13 ,  H04N19/18 ,  H04N19/186 ,  H04N19/82

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. In the CCALF process, in response to a coordinate of the second reconstructed image sample being (x, y), coordinates of the first reconstructed image samples are (2x, 2y−1), (2x−1, 2y), (2x, 2y), (2x+1, 2y), (2x−1, 2y+1), (2x, 2y+1), (2x+1, 2y+1), and (2x, 2y+2).

公开(公告)号：US12028513B2

公开(公告)日：2024-07-02

申请号：US17463889

申请日：2021-09-01

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: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52

Abstract: Provided is an encoder includes: circuitry; and memory coupled to the circuitry, in which in operation, the circuitry: generates a prediction image of a current block to be processed, using a first motion vector; and updates a history based motion vector predictor (HMVP) table using a first candidate having the first motion vector, the HMVP table storing, in a first in first out (FIFO) method, a plurality of second candidates each having a second motion vector used for a processed block, and in the updating of the HMVP table, the circuitry: determines whether a size of the current block is less than or equal to a threshold size; and skips the updating of the HMVP table when the size of the current block is determined to be less than or equal to the threshold size.

公开(公告)号：US20240114129A1

公开(公告)日：2024-04-04

申请号：US18529380

申请日：2023-12-05

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Jing Ya LI ,  Chong Soon Lim ,  Han Boon Teo ,  Che Wei Kuo ,  Hai Wei Sun ,  Chu Tong Wang ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Yusuke Kato

IPC: H04N19/105 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176

Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation: determines whether a size of a current block, which is a unit for which a vector candidate list including vector candidates is generated, is less than or equal to a threshold; when the size of the current block is less than or equal to the threshold, generates the vector candidate list by registering a history-based motion vector predictor (HMVP) vector candidate in the vector candidate list from an HMVP table without performing a first pruning process; when the size of the current block is greater than the threshold, generates the vector candidate list by performing the first pruning process and registering the HMVP vector candidate in the vector candidate list from the HMVP table; and encodes the current block using the vector candidate list.

公开(公告)号：US11616956B2

公开(公告)日：2023-03-28

申请号：US17308397

申请日：2021-05-05

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Chong Soon Lim ,  Hai Wei Sun ,  Jing Ya Li ,  Han Boon Teo ,  Ru Ling Liao ,  Che Wei Kuo ,  Tadamasa Toma ,  Takahiro Nishi ,  Kiyofumi Abe

IPC: H04N19/13 ,  H04N19/176

Abstract: An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation, determines whether a first block is available and whether a second block is available, the first block and the second block being defined relative to a current block to be processed; selects a context model based on whether the first block is available, whether the second block is available, which of inter prediction and intra prediction is to be applied to the first block, and which of inter prediction and intra prediction is to be applied to the second block; and encodes, using the context model selected, a parameter indicating which of intra prediction and inter prediction is to be applied to the current block.