公开(公告)号：US20210168357A1

公开(公告)日：2021-06-03

申请号：US17173634

申请日：2021-02-11

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Tadamasa TOMA ,  Takahiro NISHI ,  Kiyofumi ABE ,  Yusuke KATO

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/182

Abstract: An encoder includes circuitry and memory connected to the circuitry. The circuitry, in operation: derives, as a first parameter, a total sum of absolute values of sums of horizontal gradient values respectively for pairs of relative pixel positions; derives, as a second parameter, a total sum of absolute values of sums of vertical gradient values respectively for the pairs of relative pixel positions; derives, as a third parameter, a total sum of horizontal-related pixel difference values respectively for the pairs of relative pixel positions; derives, as a fourth parameter, a total sum of vertical-related pixel difference values respectively for the pairs of relative pixel positions; derives, as a fifth parameter, a total sum of vertical-related sums of horizontal gradient values respectively for the pairs of relative pixel positions; and generates a prediction image to be used to encode the current block using the first, second, third, fourth, and fifth parameters.

公开(公告)号：US20210105500A1

公开(公告)日：2021-04-08

申请号：US17101161

申请日：2020-11-23

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/513 ,  H04N19/433

Abstract: An encoder includes: circuitry; and memory coupled to the circuitry. In operation, the circuitry: derives a base motion vector to be used in predicting a current block to be encoded; 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; modifies the first motion vector when the motion vector difference is determined to be greater than the threshold, and does not modify the first motion vector when the motion vector difference is determined not to be greater than the threshold; and encodes the current block using the first motion vector modified or the first motion vector not modified.

公开(公告)号：US20210105479A1

公开(公告)日：2021-04-08

申请号：US17125113

申请日：2020-12-17

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kiyofumi ABE ,  Takahiro NISHI ,  Tadamasa TOMA ,  Yusuke KATO

IPC: H04N19/13 ,  H04N19/70 ,  H04L29/06 ,  H04N19/176 ,  H04N19/184

Abstract: An encoder includes memory and circuitry which: (i) encodes an image block; (ii) when encoding the image block: binarizes coefficient information indicating coefficients of the image block; and controls whether to apply arithmetic encoding to a binary data string obtained by binarizing the coefficient information; and (iii) when binarizing the coefficient information: binarizes the coefficient information according to a first syntax structure when arithmetic encoding is applied to the data string and a predetermined condition is not satisfied; binarizes the coefficient information according to a second syntax structure when arithmetic encoding is applied to the data string and the predetermined condition is satisfied; binarizes the coefficient information according to the second syntax structure when no arithmetic encoding is applied to the data string; and subtracts 1 from a value of an initial non-zero coefficient when no arithmetic encoding is applied to the data string when encoding the image block.

公开(公告)号：US20210104092A1

公开(公告)日：2021-04-08

申请号：US17126919

申请日：2020-12-18

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Takahiro NISHI ,  Tadamasa TOMA ,  Toshiyasu SUGIO

IPC: G06T15/20 ,  G06T7/70 ,  G06K9/00

Abstract: A data generator which achieves further improvement includes circuitry and memory connected to the circuitry. The circuitry, in operation: obtains sensing data from each of a plurality of moving bodies that includes a plurality of sensors, the sensing data being configured based on results of sensing by the plurality of sensors; and generates synthesized data by mapping the sensing data of the moving body into a virtual space, and when generating the synthesized data, determines a position of the sensing data to be mapped into the virtual space, based at least on a position of the moving body in a real space corresponding to the sensing data.

公开(公告)号：US20200260100A1

公开(公告)日：2020-08-13

申请号：US16860367

申请日：2020-04-28

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Takashi HASHIMOTO ,  Kiyofumi ABE ,  Tadamasa TOMA ,  Takahiro NISHI ,  Ryuichi KANOH

IPC: H04N19/51 ,  H04N19/433

Abstract: An encoder that encodes a picture to generate a coded stream includes: circuitry and a memory coupled to the circuitry. The circuitry performs, using the memory: generating a prediction image of a current block included in a current picture by referring to a first region included in a reference picture different from the current picture; operating a bi-directional optical flow process to correct the prediction image by referring to a second region included in the first region, and not operating the bi-directional optical flow process in response to the second region not being included in the first region; and encoding the current block based on the prediction image.

公开(公告)号：US20200242811A1

公开(公告)日：2020-07-30

申请号：US16849379

申请日：2020-04-15

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Chi WANG ,  Pongsak LASANG ,  Toshiyasu SUGIO ,  Takahiro NISHI ,  Toru MATSUNOBU

IPC: G06T9/00

Abstract: A three-dimensional data encoding method includes: generating predicted position information using position information on three-dimensional points included in three-dimensional reference data. associated with a time different from a time associated with current three-dimensional data; and encoding position information on three-dimensional points included in the current three-dimensional data, using the predicted position information.

公开(公告)号：US20200236358A1

公开(公告)日：2020-07-23

申请号：US16833174

申请日：2020-03-27

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/50 ,  H04N19/60

Abstract: An encoder according to one aspect of the present disclosure encodes a block of an image, and includes a processor and memory connected to the processor. Using the memory, the processor partitions a block into a plurality of sub blocks and encodes a sub block included in the plurality of sub blocks in an encoding process including at least a transform process or a prediction process. The block is partitioned using a multiple partition including at least three odd-numbered child nodes and each of a width and a height of each of the plurality of sub blocks is a power of two.

公开(公告)号：US20200186827A1

公开(公告)日：2020-06-11

申请号：US16794944

申请日：2020-02-19

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kiyofumi ABE ,  Takahiro NISHI ,  Tadamasa TOMA ,  Ryuichi KANOH ,  Takashi HASHIMOTO

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/159 ,  H04N19/124

Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry, in inter prediction processing: derives a first motion vector of a current block to be processed, using a motion vector of a previous block which has been previously processed; derives a second motion vector of the current block by performing motion estimation in the vicinity of the first motion vector; and generates a prediction image of the current block by performing motion compensation using the second motion vector,

公开(公告)号：US20200162738A1

公开(公告)日：2020-05-21

申请号：US16751666

申请日：2020-01-24

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Ryuichi KANOH ,  Kiyofumi ABE ,  Tadamasa TOMA ,  Takahiro NISHI

IPC: H04N19/126 ,  H04N19/12 ,  H04N19/176

Abstract: An encoder which encodes a current block to be encoded in an image includes: a transformer which performs a primary transform from residuals of the current block to primary coefficients, determines whether to apply a secondary transform to the current block, and performs the secondary transform from the primary coefficients to secondary coefficients when the secondary transform is applied; a quantizer which calculates quantized primary coefficients by performing a first quantization on the primary coefficients when a secondary transform is not applied, and calculates quantized secondary coefficients by performing a second quantization different from the first quantization on the secondary coefficients when the secondary transform is applied; and an entropy encoder which generates an encoded bitstream by encoding either quantized primary coefficients or quantized secondary coefficients.

公开(公告)号：US20200099938A1

公开(公告)日：2020-03-26

申请号：US16697525

申请日：2019-11-27

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Masato OHKAWA ,  Hideo SAITOU ,  Tadamasa TOMA ,  Takahiro NISHI ,  Kiyofumi ABE ,  Ryuichi KANOH

IPC: H04N19/159 ,  H04N19/61 ,  H04N19/625 ,  H04N19/176

Abstract: An encoder which encodes a current block of a picture includes a processor and memory. Using the memory, the processor: determines whether intra prediction is to be used for the current block; and when it is determined that intra prediction is to be used for the current block, generates first transform coefficients by performing first transform of residual signals of the current block using a first transform basis; quantizes the first transform coefficients when an intra prediction mode for the current block is a determined mode and the first transform basis is different from a determined transform basis; and generates second transform coefficients by performing second transform of the first transform coefficients using a second transform basis, and quantizes the second transform coefficients, when the intra prediction mode for the current block is not the determined mode or when the first transform basis matches the determined transform basis.