公开(公告)号：US20210360235A1

公开(公告)日：2021-11-18

申请号：US17382421

申请日：2021-07-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao YANG ,  Yuqun FAN ,  Xiang MA ,  Huanbang CHEN ,  Lian ZHANG

IPC: H04N19/112 ,  H04N19/105 ,  H04N19/513 ,  H04N19/70 ,  H04N19/82 ,  H04N19/172 ,  H04N19/137

Abstract: This application discloses a picture display order determining method which includes: obtaining a decoding order index value of a current picture and a decoding order index value of a previous picture that is adjacent to the current picture according to a decoding order; adding 1 to a cycle identifier value when the decoding order index value of the current picture is less than the decoding order index value of the previous picture; and determining a display order index value of the current picture based on a sum of the decoding order index value of the current picture and a preset positive integer multiple of the cycle identifier value. In this application, the display order index value of the current picture progressively increases based on a display order index value of a picture that is located before the current picture according to the decoding order.

公开(公告)号：US20210321127A1

公开(公告)日：2021-10-14

申请号：US17357473

申请日：2021-06-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin ZHAO ,  Haitao YANG ,  Lian ZHANG

IPC: H04N19/44 ,  H04N19/119 ,  H04N19/96 ,  H04N19/176

Abstract: This application discloses a video decoding method and apparatus, and a decoding device. The method includes: obtaining block information of a current picture block; determining, based on the block information, whether a split mode in a set of optional split modes is available determining a split mode of the current picture block from a determined available split mode; obtaining one CU or a plurality of CUs from the current picture block based on the split mode of the current picture block, and parsing a bitstream including the current picture block, to obtain decoding information of the one CU or the plurality of CUs, and decoding the CU based on the decoding information, to obtain a reconstructed block.

公开(公告)号：US20210306630A1

公开(公告)日：2021-09-30

申请号：US17345286

申请日：2021-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao YANG ,  Yin ZHAO ,  Riyang ZHAO ,  Zhongliang LI ,  Jing XIAO

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/176 ,  H04N19/167

Abstract: This application relates to the field of video coding technologies, and discloses a video coder and a corresponding method, to help improve video coding performance. In this application, encoding and decoding are collectively referred to as coding. A video coding method includes: determining a block split policy of a current picture block based on a size relationship between the width and the height of the current picture block; applying the block split policy to the current picture block to obtain a coding block; and reconstructing the obtained coding block to reconstruct the current picture block.

公开(公告)号：US20210297688A1

公开(公告)日：2021-09-23

申请号：US17338896

申请日：2021-06-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Weiwei XU ,  Haitao YANG ,  Yin ZHAO

IPC: H04N19/50 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: This application provides a weighted prediction method for multi-hypothesis encoding and an apparatus. The method includes: determining a first target prediction block of a to-be-processed picture block based on an inter prediction mode; determining a second target prediction block of the to-be-processed picture block based on an intra prediction mode; determining, based on indication information in a bitstream, weight coefficients respectively corresponding to the inter prediction mode and the intra prediction mode; and weighting a pixel value of the first target prediction block and a pixel value of the second target prediction block based on the weight coefficients, to obtain a prediction value of the to-be-processed picture block. Implementation of this application improves prediction accuracy of a pixel value of a picture block and encoding/decoding performance to some extent.

公开(公告)号：US20210297682A1

公开(公告)日：2021-09-23

申请号：US17303886

申请日：2021-06-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haitao YANG ,  Hong ZHANG ,  Shan LIU

IPC: H04N19/30 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186

Abstract: A prediction method includes: performing downsampling on a luma component of a to-be-processed image block to obtain an initial signal of the luma component; obtaining a residual signal of the luma component based on the obtained initial signal of the luma component; obtaining a residual signal of a chroma component of the to-be-processed image block based on the chroma component of the to-be-processed image block without downsampling. The method further includes: respectively performing a transform on the residual signal of the luma component and the residual signal of the chroma component, to obtain transform coefficients, performing quantization on the obtained transform coefficients, to obtain quantization coefficients, and performing entropy encoding on the obtained quantization coefficients to obtain a bitstream.

公开(公告)号：US20210274198A1

公开(公告)日：2021-09-02

申请号：US17325472

申请日：2021-05-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Haitao YANG ,  Jianle CHEN

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

Abstract: An intra prediction method and apparatus for reconstruction of unavailable reference samples are provided. The method includes obtaining an intra prediction mode of a current block, deriving availability of a reference sample of a component of the current block, substituting unavailable reference samples by using available reference samples, deriving a prediction of the current block based on the intra prediction mode and the substituted reference samples, and reconstructing the current block based on the prediction. The component includes a Cb component or a Cr component. Alternatively, the component includes a Chroma component. Since the method derives availability of the reference sample in each component, it can provide the available information more accurately.

公开(公告)号：US20210227243A1

公开(公告)日：2021-07-22

申请号：US17221184

申请日：2021-04-02

Applicant: Huawei Technologies Co., Ltd. ,  University of Science and Technology of China

Inventor： Feng WU ,  Ning YAN ,  Dong LIU ,  Houqiang LI ,  Haitao YANG

IPC: H04N19/51 ,  H04N19/176 ,  H04N19/42 ,  H04N19/80

Abstract: Embodiments of this application disclose an interpolation filter training method and apparatus, a video picture encoding and decoding method, an encoder, and a decoder. According to the training method, a first sub-pixel picture obtained through interpolation by using a conventional interpolation filter is used as label data, to train a second interpolation filter, so that the second interpolation filter obtained through training can be directly used for a pixel value, obtained through interpolation, of a first fractional pixel position. Therefore, the label data is more accurate, and coding performance of a video picture is improved. According to the encoding method, during inter prediction, a target interpolation filter used for a current encoding picture block is determined from a set of candidate interpolation filters, and the encoder selects, according to content of the current encoding picture block, an appropriate interpolation filter to perform an interpolation operation.

公开(公告)号：US20210185323A1

公开(公告)日：2021-06-17

申请号：US17187423

申请日：2021-02-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ting FU ,  Huanbang CHEN ,  Haitao YANG

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: This application provides an inter prediction method and apparatus, a video encoder, and a video decoder. The method includes: determining N target picture blocks from M picture blocks in which M neighboring locations of a current picture block are respectively located, where any two of the N target picture blocks are different, M and N are both positive integers, and M is greater than or equal to N; determining candidate motion information of the current picture block based on motion information of the N target picture blocks, and adding the candidate motion information of the current picture block to a motion information candidate list of the current picture block; and performing inter prediction on the current picture block based on the motion information candidate list. In this application, comparison operations during obtaining of the motion information candidate list can be reduced, to improve inter prediction efficiency.

公开(公告)号：US20210185316A1

公开(公告)日：2021-06-17

申请号：US17187184

申请日：2021-02-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin ZHAO ,  Haitao YANG ,  Jianle CHEN ,  Lian ZHANG

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: A picture partitioning method and apparatus are described. The method includes determining a split mode of a current node, where the current node includes a luma block and a chroma block. The method further includes determining, based on the split mode of the current node and a size of the current node, that the chroma block of the current node is not further split. In accordance with the chroma block of the current node not being further split, the method includes splitting the luma block of the current node based on the split mode of the current node. In accordance with the chroma block of the current node not being further split, the method may be used to split only the luma block of the current node, thereby improving encoding and decoding efficiency, reducing a maximum throughput of a codec, and facilitating implementation of the codec.

公开(公告)号：US20210092364A1

公开(公告)日：2021-03-25

申请号：US17114329

申请日：2020-12-07

Applicant: Huawei Technologies Co., Ltd. ,  University of Science and Technology of China

Inventor： Zhuoyi LV ,  Li LI ,  Houqiang LI ,  Haitao YANG

IPC: H04N19/105 ,  H04N19/54 ,  H04N19/527 ,  H04N19/176 ,  H04N19/139 ,  H04N19/172 ,  H04N19/52

Abstract: An image prediction method and device are disclosed. The method includes: obtaining a first reference unit of an image unit, where respective predicted images are obtained for the image unit and the first reference unit by using a same affine model; obtaining motion information of basic motion compensation units at two or more preset positions in the first reference unit; and obtaining motion information of a basic motion compensation unit of the image unit according to the motion information. In this way, motion information of the first reference unit using a same affine motion prediction model is reused, and a more accurate motion vector of a current image unit is obtained, improving prediction accuracy and maintaining encoding and decoding complexity, thereby improving encoding and decoding performance.