公开(公告)号：US20210377570A1

公开(公告)日：2021-12-02

申请号：US17399203

申请日：2021-08-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao Wang ,  Anand Meher Kotra ,  Semih Esenlik ,  Han Gao ,  Jianle Chen

IPC: H04N19/66 ,  H04N19/176 ,  H04N19/593 ,  H04N19/80

Abstract: A deblocking method is provided for deblocking a sub-partition boundary within a coding block during image encoding and/or image decoding process. The coding block is coded in an intra prediction mode and the coding block is partitioned into sub-partitions comprising a first sub-partition and a second sub-partition that is adjacent to the first sub-partition. The method comprises: determining a maximum filter length to be 1 for a first/second sub-partition when a width of the first or second sub-partition is 4 samples, or when a height of the first or second sub-partition is 4 samples; modifying a value of up to one sample of the first or second sub-partition, wherein the value of the up to one sample is obtained from a row or a column of the first or second sub-partition that is perpendicular to and adjacent to the sub-partitions boundary between the first sub-partition and the second sub-partition.

公开(公告)号：US11190807B2

公开(公告)日：2021-11-30

申请号：US16863986

申请日：2020-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih Esenlik ,  Anand Meher Kotra ,  Zhijie Zhao ,  Han Gao

IPC: H04N19/70 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/124 ,  H04N19/159 ,  H04N19/51 ,  H04N19/61 ,  H04N19/85 ,  H04N19/82

Abstract: An encoder and a decoder respectively encode and decode signal and syntax elements to/from a bitstream. In the encoding/decoding, semantics for the syntax elements are derived in accordance with previously decoded signal samples. Such encoding/decoding is applicable for instance to a video or audio signal.

公开(公告)号：US11122299B2

公开(公告)日：2021-09-14

申请号：US16994277

申请日：2020-08-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao Wang ,  Anand Meher Kotra ,  Semih Esenlik ,  Han Gao ,  Jianle Chen

IPC: H04N19/66 ,  H04N19/80 ,  H04N19/176 ,  H04N19/593

Abstract: It is provided a deblocking method, for deblocking a sub-partitions boundary within a coding block in image encoding and/or image decoding. The current coding block is coded in an intra prediction mode and the current coding block is partitioned into sub-partitions comprising a first sub-partition and a second sub-partition which is adjacent to the first sub-partition. The method comprises: determining a maximum filter length to be 1 for a first/second sub-partition when a width of the first or second sub-partition is 4 samples, or when a height of the first or second sub-partition is 4 samples; modifying a value of up to one sample of the first or second sub-partition, wherein the up to one sample is obtained from a row or a column of the first or second sub-partition that is perpendicular to and adjacent to the sub-partitions boundary between the first sub-partition and the second sub-partition.

公开(公告)号：US20210266552A1

公开(公告)日：2021-08-26

申请号：US17319098

申请日：2021-05-13

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Anand Meher Kotra ,  Elena Alexandrovna Alshina ,  Semih Esenlik ,  Biao Wang ,  Han Gao ,  Roman Igorevich Chernyak

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/186 ,  H04N19/117

Abstract: A method for deblocking a chroma block edge between a first chroma block of a first image block and a second chroma block of a second image block. The method includes a decision process which includes: determining a first chroma quantization parameter for the first chroma block based on a first luma quantization parameter of a first luma block of the first image block and a chroma QP mapping table for the first chroma block; determining a second chroma quantization parameter for the second chroma block based on a second luma quantization parameter of a second luma block of the second image block and a chroma QP mapping table for the second chroma block; determining an averaged and rounded chroma quantization parameter based on the first chroma quantization parameter and the second chroma quantization parameter; and determining a threshold parameter based on the averaged and rounded chroma quantization parameter.

公开(公告)号：US11102482B2

公开(公告)日：2021-08-24

申请号：US16994266

申请日：2020-08-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Anand Meher Kotra ,  Jianle Chen ,  Semih Esenlik ,  Biao Wang ,  Han Gao ,  Zhijie Zhao

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/105 ,  H04N19/132

Abstract: Embodiments of the present invention relate to the field of picture processing. Especially, the embodiments are directed to improving the deblocking filter of an image coding device. During the deblocking, at most a number MA of sample values of the first coding block adjacent to the block edge are modified and at most a number MB of sample values of the second coding block adjacent to the block edge are modified; or at most a number MA of sample values of the second coding block adjacent to the block edge are modified and at most a number MB of sample values of the first coding block adjacent to the block edge are modified, MA≠MB.

公开(公告)号：US11102480B2

公开(公告)日：2021-08-24

申请号：US16844740

申请日：2020-04-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Anand Meher Kotra ,  Zhijie Zhao ,  Semih Esenlik ,  Han Gao

IPC: H04N19/109 ,  H04N19/176 ,  H04N19/503 ,  H04N19/61

Abstract: An apparatus is configured to determine an adopted intra prediction mode on the basis of a most probable modes list, a selected modes list and a non-selected modes list having a first portion and a second portion, wherein the adopted intra prediction mode is one of a plurality of intra prediction modes comprising a plurality of angular intra prediction modes for predicting sample values of a current picture block. The apparatus includes a processor configured to generate the first portion of the non-selected modes list by including one or more angular intra prediction modes determined to be close to a respective angular intra prediction mode of the most probable modes list and the selected modes list. The processor is further configured to determine the adopted intra prediction mode.

公开(公告)号：US20210195229A1

公开(公告)日：2021-06-24

申请号：US17172088

申请日：2021-02-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Semih Esenlik ,  Han Gao ,  Jianle Chen ,  Anand Meher Kotra ,  Biao Wang

IPC: H04N19/52 ,  H04N19/56 ,  H04N19/96 ,  H04N19/176

Abstract: An apparatus and method for marking availability of a candidate coding block for merge estimation of a current coding block within a coding tree unit, CTU, which includes multiple coding blocks. Initially, the candidate coding block is marked as available. The candidate coding block is marked as unavailable when a predefined location of the candidate coding block is included within an extended merge estimation region, MER. The extended MER includes a current MER in which the current coding block is located and at least a portion of another MER, adjacent to the current MER.

公开(公告)号：US20210014484A1

公开(公告)日：2021-01-14

申请号：US17037550

申请日：2020-09-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Anand Meher Kotra ,  Zhijie Zhao ,  Semih Esenlik ,  Han Gao

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/189 ,  H04N19/176

Abstract: The disclosure relates to a decoder for reconstructing a current block of an encoded picture, the decoder comprising processing circuitry configured to generate a most probable modes (MPM) candidates list for the current block, the MPM candidates list comprising four or more elements, wherein the first four elements of the MPM candidates list are, in this order, an intra-prediction mode associated with a left neighboring block of the current block, an intra-prediction mode associated with a top neighboring block of the current block, a planar mode, and an intra-prediction mode associated with a top-left neighboring block of the current block, prune the MPM candidates list, thereby generating an MPM list, and intra-predict the current block based on the MPM list. A higher compression ratio can thus be achieved.

公开(公告)号：US10856006B2

公开(公告)日：2020-12-01

申请号：US16730735

申请日：2019-12-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih Esenlik ,  Zhijie Zhao ,  Anand Meher Kotra ,  Han Gao

IPC: H04N19/523 ,  H04N19/105 ,  H04N19/139 ,  H04N19/513 ,  H04N19/533 ,  H04N19/56 ,  H04N19/573 ,  H04N19/109 ,  H04N19/577

Abstract: A method and system for motion vector refinement in a search space for multi-reference inter-prediction are provided. Two or more reference pictures are selected, one of those used for motion vector refinement. Based on an initial estimate of a motion vector to the reference picture for motion vector refinement, a search space in this reference image is constructed. Using template matching, the first motion vector is refined. The second motion vector to another reference picture is calculated using its initial estimate, the initial estimate of the first motion vector and the refined first motion vector. The search spaces used in template matching in different iterations overlap.

公开(公告)号：US20250097478A1

公开(公告)日：2025-03-20

申请号：US18966042

申请日：2024-12-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Anand Meher Kotra ,  Semih Esenlik ,  Biao Wang ,  Han Gao ,  Zhijie Zhao ,  Jianle Chen

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/80

Abstract: An image processing device for use in an image encoder and/or an image decoder, for deblocking a block edge between a first block and a second block of an image encoded with a block code, is provided. The image processing device comprises a filter for filtering the block edge, configured to, for at least some of the pixels to be filtered, within a deblocking range from the block edge, the deblocking range being perpendicular to the block edge, determine a filtered pixel value from an original pixel value of the pixel and at least one further pixel value, determine a clipping value of the pixel, dependent upon a distance of the pixel from the block edge, and clip the filtered pixel value, using the clipping value resulting in a deblocked pixel value.