公开(公告)号：US11252426B2

公开(公告)日：2022-02-15

申请号：US17104866

申请日：2020-11-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N11/02 ,  H04N19/44 ,  H04N19/136 ,  H04N19/176 ,  H04N19/625

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：US11206408B2

公开(公告)日：2021-12-21

申请号：US17140041

申请日：2021-01-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen ,  Jiali Fu

IPC: H04N19/139 ,  H04N19/119 ,  H04N19/176 ,  H04N19/61

Abstract: A method includes: parsing a bitstream to obtain an index value of a candidate motion vector list; constructing the candidate motion vector list, where the candidate motion vector list includes candidate motion vectors of K control points of a current block, the candidate motion vectors of the K control points are obtained based on a 2N-parameter affine transform model used for a neighboring block of the current block, N, K are integers greater than or equal to 2 and less than or equal to 4, and N is not equal to K; determining, in the candidate motion vector list, target candidate motion vectors of the K control points based on the index value; and obtaining a predicted motion vector of each subblock of the current block based on the target candidate motion vectors of the K control points. It helps improve coding efficiency in an audio and video coding process.

公开(公告)号：US20210368174A1

公开(公告)日：2021-11-25

申请号：US17394225

申请日：2021-08-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen ,  Jiali Fu

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/169 ,  H04N19/46 ,  H04N19/96

Abstract: A video coding mechanism is disclosed. The mechanism includes obtaining a coding tree unit including luma samples and chroma samples. The mechanism partitions the luma samples and the chroma samples according to a common coding tree when a size of a first coding tree node exceeds a threshold. The mechanism also partitions the luma samples with a luma coding sub-tree when a size of a second coding tree node is equal to or less than the threshold. The mechanism also chroma samples with a chroma coding sub-tree when a size of a third coding tree node is equal to or less than the threshold. The luma coding sub-tree contains a different set of split modes than the chroma coding sub-tree.

公开(公告)号：US20210344903A1

公开(公告)日：2021-11-04

申请号：US17370120

申请日：2021-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lu Yu ,  Ye-Kui Wang ,  Hualong Yu ,  Yin Zhao ,  Yuqun Fan ,  Xiaoding Gao ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/46 ,  H04N19/184 ,  H04N19/172

Abstract: A video encoding method, a video decoding method, an apparatus, a device, and a storage medium include parsing a first flag from the video bitstream when a video bitstream is allowed to be decoded by referencing a library picture corresponding to a library picture bitstream, using a value of a target parameter of the video bitstream as a value of a target parameter of the library picture bitstream referenced by the video bitstream when a value of the first flag is a first value, and reconstructing, based on the value of the target parameter of the library picture bitstream referenced by the video bitstream and the library picture bitstream referenced by the video bitstream to obtain the library picture corresponding to the library picture bitstream referenced by the video bitstream.

公开(公告)号：US11146809B2

公开(公告)日：2021-10-12

申请号：US16838954

申请日：2020-04-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N7/18 ,  H04N19/52 ,  H04N19/176 ,  H04N19/625 ,  H04N19/80

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：US11109060B2

公开(公告)日：2021-08-31

申请号：US16815914

申请日：2020-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shan Gao ,  Huanbang Chen ,  Haitao Yang ,  Jiantong Zhou ,  Shan Liu ,  Sriram Sethuraman ,  Jay Shingala ,  Jeeva Raj A ,  Sagar Kotecha

IPC: H04N19/176 ,  H04N19/523 ,  H04N19/56

Abstract: An image prediction method and apparatus includes obtaining predicted motion information of an image block; determining an initial predicted block of the image block according to the predicted motion information and a reference image of the image block; performing, according to the predicted motion information, L iterative searches in the reference image using an integer pixel step size to obtain an intermediate predicted block of the image block; performing a single search in the reference image using a fractional pixel step size to obtain M predicted blocks of the image block; determining a target predicted block of the image block according to the M predicted blocks and the intermediate predicted block; and obtaining a predicted value of a pixel value of the image block according to a pixel value of the target predicted block.

公开(公告)号：US11102501B2

公开(公告)日：2021-08-24

申请号：US15901410

申请日：2018-02-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang

IPC: H04N19/174 ,  H04N19/31 ,  H04N19/513 ,  H04N19/52 ,  H04N19/573 ,  H04N19/567 ,  H04N19/577 ,  H04N19/537 ,  H04N19/40 ,  H04N19/53

Abstract: A motion vector field coding and decoding method, where the method includes obtaining an original signal of a current motion vector field block, where the current motion vector field block is obtained by dividing a current motion vector field into blocks, and the current motion vector field is a motion vector field corresponding to a video frame at a moment t, obtaining a prediction signal of the current motion vector field block and prediction information of the current motion vector field block, calculating a prediction residual signal of the current motion vector field block according to the prediction signal and the original signal, where the prediction residual signal is used to indicate a residual between the original signal and the prediction signal, and writing the prediction information and the prediction residual signal into a bitstream.

公开(公告)号：US11102484B2

公开(公告)日：2021-08-24

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 ,  H04N19/159 ,  H04N19/61

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：US11039145B2

公开(公告)日：2021-06-15

申请号：US16662627

申请日：2019-10-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaomu Lu ,  Shan Gao ,  Haitao Yang

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/14 ,  H04N19/117 ,  H04N19/176 ,  H04N19/182 ,  H04N19/593

Abstract: An image prediction method and a related product, where the image prediction method includes performing intra-frame prediction on a current block using a reference block to obtain an initial predicted pixel value of a pixel in the current block, and performing weighted filtering on the initial predicted pixel value of the pixel in the current block to obtain a predicted pixel value of the pixel in the current block. Weighting coefficients used for the weighted filtering include a horizontal weighting coefficient and a vertical weighting coefficient, and a first attenuation rate factor acting on the horizontal weighting coefficient is different from a second attenuation rate factor acting on the vertical weighting coefficient.

公开(公告)号：US11025952B2

公开(公告)日：2021-06-01

申请号：US16193954

申请日：2018-11-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhuoyi Lv ,  Haitao Yang ,  Wenyi Qiu ,  Dongsheng Wu

IPC: H04N19/58 ,  H04N19/107 ,  H04N19/23 ,  H04N19/179 ,  H04N19/137 ,  H04N19/44 ,  H04N19/46

Abstract: Methods, devices, apparatus, and systems for video encoding/decoding in which usage of a background picture is synchronized on an encoder side and a decoder side. In this solution, a background picture that is to be used as a reference picture is determined, background-picture indication information is used to indicate a time point from which the background picture is used as the reference picture, the encoder side encodes to-be-coded video pictures by using the background picture as the reference picture from the time point indicated by the background-picture indication information, to generate a primary bitstream, and the encoder side transmits a background-picture bitstream, the background-picture indication information, and the primary bitstream to the decoder side.