公开(公告)号：US20220060719A1

公开(公告)日：2022-02-24

申请号：US17520137

申请日：2021-11-05

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/583

Abstract: An encoder includes memory, and circuitry accessible to the memory. The circuitry accessible to the memory: determines whether OBMC is applicable to generation of a prediction image of a current block, according to whether BIO is to be applied to the generation of the prediction image of the current block; when BIO is to be applied to the generation of the prediction image of the current block, determines that OBMC is not applicable to the generation of the prediction image of the current block, and applies BIO to the generation of the prediction image of the current block without applying OBMC.

公开(公告)号：US20210385474A1

公开(公告)日：2021-12-09

申请号：US17408315

申请日：2021-08-20

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 ,  H04N19/119 ,  H04N19/137 ,  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：US20210360281A1

公开(公告)日：2021-11-18

申请号：US17389010

申请日：2021-07-29

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/52 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/59

Abstract: An encoder includes memory and circuitry configured to determine a merge mode to be applied to a current block, wherein the merge mode includes a sub-block merge mode and a first merge mode. In the merge mode, inter-prediction parameters are inferred from a neighboring block neighboring the current block. In the sub-block merge mode, the current block includes a plurality of sub-blocks, and inter-prediction parameters are provided for each of the plurality of sub-blocks. When the merge mode is determined to be the first merge mode, the circuitry generates a prediction image for the current block by performing a bi-directional optical flow prediction process, wherein the bi-directional optical flow prediction process uses a spatial gradient for the current block. When the merge mode is determined to be the sub-block merge mode, the circuitry generates a prediction image for the current block by not performing the bi-directional optical flow prediction process.

公开(公告)号：US20210360272A1

公开(公告)日：2021-11-18

申请号：US17388694

申请日：2021-07-29

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: H04N19/44 ,  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：US20210344958A1

公开(公告)日：2021-11-04

申请号：US17373106

申请日：2021-07-12

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/597 ,  H04N19/159 ,  H04N19/176 ,  G06T5/00 ,  H04N19/46 ,  H04N19/85

Abstract: An encoder capable of properly handling an image to be encoded or decoded includes processing circuitry and memory connected to the processing circuitry. Using the memory, the processing circuitry: obtains parameters including at least one of (i) one or more parameters related to a first process for correcting distortion in an image captured with a wide angle lens and (ii) one or more parameters related to a second process for stitching a plurality of images; generates an encoded image by encoding a current image to be processed that is based on the image or the plurality of images; and writes the parameters into a bitstream including the encoded image.

公开(公告)号：US20210314600A1

公开(公告)日：2021-10-07

申请号：US17349459

申请日：2021-06-16

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/124 ,  H04N19/122 ,  H04N19/44

Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry performs a primary transform on a derived prediction error, performs a secondary transform on a result of the primary transform, quantizes a result of the secondary transform, and encodes a result of the quantization as data of an image. When a current block to be processed has a predetermined shape, the encoder performs the secondary transform using, among secondary transform basis candidates that are secondary bases usable in the secondary transform, only a secondary transform basis candidate having a size that is not largest size containable in the current block.

公开(公告)号：US20210243469A1

公开(公告)日：2021-08-05

申请号：US17230725

申请日：2021-04-14

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/513 ,  H04N19/119 ,  H04N19/176 ,  H04N19/96

Abstract: An encoder includes circuitry and memory connected to the circuitry. In operation, the circuitry corrects a base motion vector using a correction value in a fixed direction; and encodes a current partition by using the corrected base motion vector corrected. The correction value is specified by an index indicating one of correction values included in a table. The table is selected from among a plurality of tables, wherein the correction values in one of the plurality of tables have different increments from the correction values in another one of the plurality of tables.

公开(公告)号：US20210195245A1

公开(公告)日：2021-06-24

申请号：US17116137

申请日：2020-12-09

Applicant: Panasonic Intellectual Property Corporation of America

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

IPC: H04N19/66 ,  H04N19/176 ,  H04N19/122

Abstract: An encoder includes circuitry and memory connected to the circuitry, and the circuitry, in operation: determines, based on a width and a height of a block, whether or not to disable a prediction mode in which the block is split along a partitioning line defined by a distance and an angle and then prediction is performed; and encodes the block with the prediction mode disabled or not disabled according to a result of the determination on whether or not to disable the prediction mode. Here, the distance is the shortest distance between the center of the block and the partitioning line, and the angle is an angle representing a direction from the center of the block toward the partitioning line in the shortest distance. The circuitry determines to disable the prediction mode when (i) a width-to-height ratio is at least 8 or (ii) a height-to-width ratio is at least 8.

公开(公告)号：US20210160560A1

公开(公告)日：2021-05-27

申请号：US17167174

申请日：2021-02-04

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Tadamasa TOMA ,  Noritaka IGUCHI ,  Hisaya KATOU

IPC: H04N21/262 ,  H04N21/234 ,  H04N21/242 ,  H04N21/8547 ,  H04N21/858 ,  H04N21/236 ,  H04N21/2365 ,  H04N21/235 ,  H04N21/84 ,  H04N21/43

Abstract: A transmitting method according to one aspect of the present disclosure includes transmitting a first stream, the first stream including: timing update identification information id1 indicating whether or not a correspondence relationship between a first reference clock and a second reference clock has been updated, the first reference clock being used to transmit and receive the first stream, and the second reference clock being used to transmit and receive a second stream related to another content to be reproduced in synchronization with the content related to the first stream; a first time according to the first reference clock; and a second time according to the second reference clock, the second time being associated with the first time based on the updated correspondence relationship.

公开(公告)号：US20210152874A1

公开(公告)日：2021-05-20

申请号：US17158151

申请日：2021-01-26

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Peter KLENNER ,  Frank HERRMANN ,  Tadamasa TOMA

IPC: H04N21/438 ,  H04N21/238

Abstract: A client receives streaming data according to Moving Picture Experts Group-Dynamic Adaptive Streaming over HTTP (MPEG-DASH) standard. The client includes a transmitter which transmits a Media Presentation Description (MPD) request or a segment request to a server, and a receiver which receives an MPD specified in the MPD request and a segment specified in the segment request. The MPD request contains information requesting transmission of an initialization segment by a push. The receiver receives the initialization segment transmitted by the push.