公开(公告)号：US12101496B2

公开(公告)日：2024-09-24

申请号：US17517066

申请日：2021-11-02

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Virginie Drugeon ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Yusuke Kato

IPC: H04N19/44 ,  H04N19/159 ,  H04N19/172 ,  H04N19/46

CPC classification number: H04N19/44 ,  H04N19/159 ,  H04N19/172 ,  H04N19/46

Abstract: Circuitry of a decoder is configured to decode an image according to a coding structure including an intra random access point (IRAP) picture, leading pictures to be output before the IRAP picture in output order, and trailing pictures to be output after the IRAP picture in the output order. When the image is decoded, the circuitry decodes, according to a flag in a bitstream, at most one trailing picture among the trailing pictures before decoding the leading pictures in decoding order, and decodes the trailing pictures other than the at most one trailing picture after decoding the leading pictures in the decoding order. The flag indicates whether a picture of each of access units in the bitstream is a field picture. The circuitry decodes the at most one trailing picture before decoding the leading pictures in the decoding order when the flag indicates that the picture is a field picture.

公开(公告)号：US12088849B2

公开(公告)日：2024-09-10

申请号：US17832973

申请日：2022-06-06

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Virginie Drugeon ,  Tadamasa Toma ,  Takahiro Nishi ,  Kiyofumi Abe ,  Yusuke Kato

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/167 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/70 ,  H04N19/132 ,  H04N19/167 ,  H04N19/186

Abstract: An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry determines whether or not a current video to be processed is a progressive video. When it is determined that the current video is a progressive video, the encoder encodes, into a bitstream, one syntax element indicating a chroma location type which is information indicating locations of chroma samples relative to luma samples for a frame included in the current video. When it is determined that the current video is not a progressive video, the encoder encodes two syntax elements into the bitstream, each of which indicates the chroma location type for a different one of fields of two types included in the current video.

公开(公告)号：US12069266B2

公开(公告)日：2024-08-20

申请号：US17691623

申请日：2022-03-10

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yusuke Kato ,  Kiyofumi Abe ,  Tadamasa Toma ,  Takahiro Nishi

IPC: H04N19/13 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46 ,  H04N19/91

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46 ,  H04N19/91

Abstract: An encoder includes circuitry and memory coupled to the circuitry. In residual coding of a current block to which an orthogonal transform is not applied, when coefficient information flags relating to a coefficient in the current block are encoded, the circuitry: performs a level mapping process to transform the coefficient to a second coefficient by using a predicted value, in which the predicted value is determined based on neighboring coefficients of the coefficient within the current block; encodes second coefficient information flags by Context-based Adaptive Binary Arithmetic Coding (CABAC), each of the second coefficient information flags relating to the second coefficient; and encodes a remainder value of the coefficient with Golomb-Rice code, and when the coefficient information flags are not encoded, in operation, the circuitry: skips the level mapping process; and encodes a value of the coefficient with the Golomb-Rice code.

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：US12010347B2

公开(公告)日：2024-06-11

申请号：US17685226

申请日：2022-03-02

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：US11973932B2

公开(公告)日：2024-04-30

申请号：US17722901

申请日：2022-04-18

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Yusuke Kato

IPC: H04N19/103 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70

CPC classification number: H04N19/103 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70

Abstract: An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry: determines whether an image format of a video is a format including a chroma component; when it is determined that the image format is a format including a chroma component, signals a flag indicating whether application of JCCR is allowed or not in a header of a stream, and (i) encodes the video with application of the JCCR allowed, or (ii) encodes the video with application of the JCCR not allowed; and when it is determined that the image format is a format including no chroma component, signals no flag indicating whether application of the JCCR is allowed or not in the header of the stream, and encodes the video with application of the JCCR not allowed.

公开(公告)号：US11936887B2

公开(公告)日：2024-03-19

申请号：US17988337

申请日：2022-11-16

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Virginie Drugeon ,  Tadamasa Toma ,  Takahiro Nishi ,  Kiyofumi Abe ,  Yusuke Kato

IPC: H04N19/31

CPC classification number: H04N19/31

Abstract: An encoder includes circuitry, and memory coupled to the circuitry. The circuitry, in operation, for each of a plurality of sub-bitstreams having mutually different frame rates, encodes identification information into a header of a bitstream including the plurality of sub-bitstreams, the identification information indicating a temporal ID that is an identifier of a temporal layer related to a temporal scalability and corresponds to the sub-bitstream, and encodes level information indicating a conformance level of the sub-bitstream.

公开(公告)号：US11917179B2

公开(公告)日：2024-02-27

申请号：US17962358

申请日：2022-10-07

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/00 ,  H04N19/44 ,  H04N19/105 ,  H04N19/117 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/117 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

Abstract: A decoder includes circuitry which, in operation, parses a first flag indicating whether a CCALF (cross component adaptive loop filtering) process is enabled for a first block located adjacent to a left side of a current block; parses a second flag indicating whether the CCALF process is enabled for a second block located adjacent to an upper side of the current block; determines a first index associated with a color component of the current block; and derives a second index indicating a context model, using the first flag, the second flag, and the first index. The circuitry, in operation, performs entropy decoding of a third flag indicating whether the CCALF process is enabled for the current block, using the context model indicated by the second index; and performs the CCALF process on the current block in response to the third flag indicating the CCALF process is enabled for the current block.

公开(公告)号：US11902526B2

公开(公告)日：2024-02-13

申请号：US17495348

申请日：2021-10-06

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yusuke Kato ,  Takahiro Nishi ,  Tadamasa Toma ,  Kiyofumi Abe

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91

Abstract: An encoder includes circuitry and memory. In both of a first type of residual coding where an orthogonal transform is applied and a second type of residual coding where the orthogonal transform is skipped, wherein when a restriction on a number of CABAC processes allows CABAC coding of a set of coefficient information flags, the circuitry: encodes the coefficient information flags by CABAC; and otherwise, the circuitry: skips the CABAC encoding of the coefficient information flags; and the circuitry encodes a remainder value of the coefficient with Golomb-Rice code when the coefficient information flags are encoded; and otherwise the circuitry encodes a value of the coefficient with the Golomb-Rice code, wherein in the second type of residual coding, the circuitry encodes absolute value flags each relating to an absolute value of the coefficient after encoding the coefficient information flags and before encoding the remainder value of the coefficient.