公开(公告)号：US20210136392A1

公开(公告)日：2021-05-06

申请号：US17149726

申请日：2021-01-15

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Xiang Ma ,  Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/186 ,  H04N19/176

Abstract: Techniques are described of a linear model prediction mode. A set of reconstructed neighboring luma samples are determined. Two pairs of luma value and chroma value are determined according to N reconstructed neighboring luma samples, N reconstructed neighboring chroma samples, M reconstructed neighboring luma samples, and M reconstructed neighboring chroma samples. The minimum value of the N reconstructed neighboring luma samples is not less than the maximum luma value of the remaining reconstructed neighboring luma samples of the set of reconstructed neighboring luma samples. The maximum value of the M reconstructed neighboring luma samples is not larger than the minimum luma value of the remaining reconstructed neighboring luma samples of the set of reconstructed neighboring luma samples. M>1 and N>1. Linear model parameters are determined based on the two pairs of luma value and chroma value, and a predictive block is determined based on the linear model parameters.

公开(公告)号：US20210127128A1

公开(公告)日：2021-04-29

申请号：US17138250

申请日：2020-12-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Timofey Mikhailovich Solovyev ,  Jianle Chen ,  Sergey Yurievich Ikonin

IPC: H04N19/52 ,  H04N19/169

Abstract: Motion vectors (MVs) are used as predictors for prediction of an image for a current coding unit (CU) within a current video frame. The MVs are from a list of motion vector candidates (MVCs), which is generated. The list includes MVs determined from a first or second pattern, each pattern specifying MVC positions. The first MV positions are within a current video frame, while the second MV positions are for a video frame different from the current frame. The MVC list is generated for a current CU with the MV positions being relative to a position of the current CU. In particular, the MVC list is generated in dependence on a size of the current CU and a size of a grid specifying a minimum distance between two MV positions. One or more MVs as specified by the MV positions of said pattern are included into the MVC list.

公开(公告)号：US20210127122A1

公开(公告)日：2021-04-29

申请号：US17142185

申请日：2021-01-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alexey Konstantinovich FILIPPOV ,  Vasily Alexeevich RUFITSKIY ,  Jianle Chen

IPC: H04N19/159 ,  H04N19/593 ,  H04N19/176 ,  H04N19/117 ,  H04N19/103 ,  H04N19/105 ,  H04N19/80

Abstract: A method of intra prediction of a block in a picture of a video is disclosed. The method comprises obtaining an intra prediction mode of the block; determining whether the intra prediction mode of the block is a wide-angle mode; filtering reference samples for the block based, at least in part, upon determining that the intra prediction mode of the block is the wide-angle mode; and generating predicted samples of the block based on filtered reference samples.

公开(公告)号：US20210084319A1

公开(公告)日：2021-03-18

申请号：US17104866

申请日：2020-11-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/44 ,  H04N19/625 ,  H04N19/136 ,  H04N19/176

Abstract: A video decoding method and apparatus employing spatially varying transform (SVT) with adaptive transform type include determining a usage of an SVT-vertical (V) or an SVT-horizontal (H) for a residual block, determining a transform block position of a transform block of the residual block, determining a transform type of the transform block, wherein the transform type indicates a horizontal transform and a vertical transform for the transform block, wherein at least one of the horizontal transform or the vertical transform is a discrete sine transform (DST)-7, and reconstructing the residual block based on the transform type, the transform block position and transform coefficients of the transform block.

公开(公告)号：US20210084298A1

公开(公告)日：2021-03-18

申请号：US17106163

申请日：2020-11-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/119 ,  H04N19/70 ,  H04N19/169 ,  H04N19/176

Abstract: A method for boundary partition of a current block of a picture is provided. The method includes that a decoder receives a bitstream, where the bitstream includes a partition indicator; parses the bitstream to obtain the partition indicator; determines whether the current block is to be split based on the partition indicator; determines whether the current block is a boundary block when the current block is not to be split; and performs a boundary partition on the current block when the current block is a boundary block. The partition indicator of a same partition syntax is used no matter whether the current block is a boundary block (isB) or a non-boundary block (noB), which is benefit to keep the continuity of context-adaptive binary arithmetic coding (CABAC) engine, thus it will lead to higher coding efficiency.

公开(公告)号：US20210006809A9

公开(公告)日：2021-01-07

申请号：US16849302

申请日：2020-04-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/44 ,  H04N19/12 ,  H04N19/61 ,  H04N19/625 ,  H04N19/176

Abstract: The present disclosure discloses a video decoding method, including: parsing a received bitstream to obtain prediction information of a CU; obtaining a target transform mode of a residual TU; parsing the received bitstream to obtain transform coefficients of the residual TU; applying an inverse quantization to the transform coefficients of the residual TU to obtain dequantized coefficients; applying, based on the target transform mode, an inverse transform to the dequantized coefficients to obtain a residual block of the residual TU; obtaining a prediction block of the CU based on the prediction information; and obtaining a video block based on the residual block and the prediction block; and outputting a video sequence, the video sequence including a video frame that includes the video block.

公开(公告)号：US20200351500A1

公开(公告)日：2020-11-05

申请号：US16929979

申请日：2020-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiali Fu ,  Yin Zhao ,  Shan Gao ,  Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/122 ,  H04N19/119 ,  H04N19/61 ,  H04N19/159

Abstract: A video coding mechanism is disclosed. The mechanism includes selecting a split mechanism to split a coding unit (CU) into sub-CUs for application of one or more transform units (TUs), the selection of the split mechanism based on comparing a CU width to a max TU width and comparing a CU height to a max TU height. The selected split mechanism is applied to the CU to obtain sub-CUs. A residual of one of the sub-CUs is determined. The residual includes a difference between sample values for the sub-CU and prediction samples for the sub-CU. The TUs are applied to transform the residual of the CU based on results of the selected split mechanism. A transformed residual for the CU is encoded into a bitstream.

公开(公告)号：US20200260108A1

公开(公告)日：2020-08-13

申请号：US16838954

申请日：2020-04-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/52 ,  H04N19/625 ,  H04N19/80 ,  H04N19/176

Abstract: Disclosed is a mechanism for selecting an interpolation filter for use in conjunction with an affine block in video coding. A motion vector is determined for a sub-block of the affine block based on control points. A sub-block size of the sub-block is also determined. The interpolation filter is selected for application to a reference block corresponding to the sub-block. The interpolation filter is selected based on the sub-block size. The motion vector of the sub-block and an offset of a current sample of the sub-block are employed to determine a reference sample at the reference block. This includes applying the interpolation filter to the reference block to determine the reference sample when the motion vector at the offset points to a fractional position at the reference block. The reference samples are employed to determine residual information in order to encode the affine block.

公开(公告)号：US12301807B2

公开(公告)日：2025-05-13

申请号：US18451131

申请日：2023-08-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/122 ,  G06T9/00 ,  G06T9/40 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61 ,  H04N19/625

Abstract: A method of video coding a block of a picture includes: obtaining a residual signal resulting from inter- or intra-picture prediction; inferring use of a DCT2 transform core for a sequence of the residual signal; processing the transformation of the block using the inferred transform core.

公开(公告)号：US12289474B2

公开(公告)日：2025-04-29

申请号：US17702448

申请日：2022-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fnu Hendry ,  Ye-Kui Wang ,  Jianle Chen

IPC: H04N19/70 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/44 ,  H04N19/46

Abstract: A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU) having a picture header (PH) with a PH syntax structure, where the PH syntax structure includes the following syntax elements common for all slices of a coded picture associated with the PH syntax structure: a non-reference picture flag, a picture parameter set (PPS) identifier (ID), a picture order count (POC) least significant bit (LSB), a no output of prior pictures flag, a recovery point POC, and a picture output flag; and decoding the coded picture from the PU to obtain a decoded picture.