公开(公告)号：US10911767B2

公开(公告)日：2021-02-02

申请号：US16385600

申请日：2019-04-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang

IPC: H04N19/51 ,  H04N19/182 ,  H04N19/59 ,  H04N19/597 ,  H04N19/513

Abstract: A motion compensating prediction method includes: determining a location of an initial reference pixel of a current pixel in a reference image, where the current pixel is located in a first sub-image in a current image, when the initial reference pixel is located outside a second sub-image at a location corresponding to the first sub-image in the reference image, determining a location of a target reference pixel of the current pixel in the reference image based on the location of the initial reference pixel, where location precision of the target reference pixel is limited to being less than or equal to preset pixel location precision, and determining a predicted value of a pixel value of the current pixel based on a pixel value of the target reference pixel and/or a pixel value of a neighboring pixel of the target reference pixel.

公开(公告)号：US10779000B2

公开(公告)日：2020-09-15

申请号：US16371486

申请日：2019-04-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang

IPC: H04N19/52 ,  H04N19/182 ,  H04N19/547 ,  H04N19/597 ,  H04N19/176 ,  H04N19/85 ,  H04N19/105

Abstract: Embodiments of this application provide a motion-compensated prediction method which includes determining a location that is of an initial reference pixel of a current pixel and that is in a reference image, where the current pixel is located in a first sub-image in the current image; when the initial reference pixel is located outside a second sub-image that is in the reference image and that is at a location corresponding to the first sub-image, determining, based on the location of the initial reference pixel, a location that is of a target reference pixel of the current pixel and that is in the reference image; and determining a prediction value of a pixel value of the current pixel based on a pixel value of the target reference pixel and/or a pixel value of a neighboring pixel of the target reference pixel.

公开(公告)号：US20190273936A1

公开(公告)日：2019-09-05

申请号：US16385600

申请日：2019-04-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang

IPC: H04N19/51 ,  H04N19/597 ,  H04N19/59 ,  H04N19/182

Abstract: A motion compensating prediction method includes: determining a location of an initial reference pixel of a current pixel in a reference image, where the current pixel is located in a first sub-image in a current image, when the initial reference pixel is located outside a second sub-image at a location corresponding to the first sub-image in the reference image, determining a location of a target reference pixel of the current pixel in the reference image based on the location of the initial reference pixel, where location precision of the target reference pixel is limited to being less than or equal to preset pixel location precision, and determining a predicted value of a pixel value of the current pixel based on a pixel value of the target reference pixel and/or a pixel value of a neighboring pixel of the target reference pixel.

公开(公告)号：US12289455B2

公开(公告)日：2025-04-29

申请号：US18581610

申请日：2024-02-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Fan Mu ,  Yin Zhao ,  Haitao Yang

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining chroma values of chroma samples; obtaining, luma values of luma samples corresponding to the chroma samples; obtaining, from the luma values, a first luma set and a second luma set; grouping the chroma values into a first chroma set and a second chroma set; determining a scaling coefficient in a linear model based on an average value of luma values in the first luma set, an average value of luma values in the second luma set, an average value of chroma values in the first chroma set, and an average value of chroma values in the second chroma set; determining, based on the scaling coefficient, an offset factor in the linear model; and determining prediction information of the chroma block based on the scaling coefficient and the offset factor.

公开(公告)号：US12262053B2

公开(公告)日：2025-03-25

申请号：US18544099

申请日：2023-12-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Jianle Chen ,  Haitao Yang

IPC: H04N19/11 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a video signal partitioned into a chroma block and a first neighboring luma block. The mechanism also includes encoding prediction information for chroma samples of the chroma block into a bitstream. The prediction information for the chroma samples is determined via intra-prediction based on down-sampled neighboring luma samples. The down-sampled neighboring luma samples are generated from a single row of luma samples from the first neighboring luma block. A bitstream including the prediction information for the chroma samples is transmitted to support decoding and display of the chroma samples.

公开(公告)号：US12022078B2

公开(公告)日：2024-06-25

申请号：US17954861

申请日：2022-09-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao Yang ,  Lian Zhang ,  Xiang Ma

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

CPC classification number: H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

Abstract: The present application disclose a picture processing method and apparatus, which are applicable to a video picture processing scenario. The method includes: obtaining at least two transform coefficient blocks, where each of the at least two transform coefficient blocks includes at least two transform coefficients that correspond to different frequency points; determining, according to a preset frequency point scanning order, the transform coefficients that are in the at least two transform coefficient blocks and that correspond to a selected frequency point; and encoding, according to a preset coefficient scanning order, each transform coefficient corresponding to the selected frequency point, to obtain picture encoded information.

公开(公告)号：US11930209B2

公开(公告)日：2024-03-12

申请号：US17361692

申请日：2021-06-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen ,  Xiang Ma

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

Abstract: Apparatuses and methods for encoding and decoding are provided. The method for intra predicting a chroma sample of a block by applying cross-component linear model includes: obtaining reconstructed luma samples; determining maximum and minimum luma sample values based on the reconstructed luma samples; obtaining a difference of the maximum and minimum luma sample values. The method also includes: fetching a value out of a lookup table (LUT) by using a set of bits as an index, the set of bits following a position of the most-significant bit; obtaining linear model parameters based on the fetched value; and calculating a predicted chroma sample value by using the obtained linear model parameters. The efficiency to fetch the value out of the LUT is increased.

公开(公告)号：US11770522B2

公开(公告)日：2023-09-26

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 ,  H04N19/137 ,  H04N19/172 ,  H04N19/513 ,  H04N19/70 ,  H04N19/82 ,  H04N19/124

CPC classification number: H04N19/112 ,  H04N19/105 ,  H04N19/137 ,  H04N19/172 ,  H04N19/513 ,  H04N19/70 ,  H04N19/82 ,  H04N19/124

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：US11595669B2

公开(公告)日：2023-02-28

申请号：US17303976

申请日：2021-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Jianle Chen ,  Haitao Yang

IPC: H04N19/196 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining a maximum luma value and a minimum luma value based on luma samples corresponding to neighboring samples of a target chroma block, and calculating a first difference between the maximum luma value and the minimum luma value; if the first difference is not equal to 0, processing the first difference based on a quantity of significant bits of the first difference and a first preset bit depth to obtain a second difference; and determining, based on a first chroma value, a second chroma value, and the second difference, an intra prediction model parameter corresponding to the target chroma block, and determining prediction information of the target chroma block based on the intra prediction model parameter and luma reconstruction information corresponding to the target chroma block.

公开(公告)号：US20230057680A1

公开(公告)日：2023-02-23

申请号：US17979532

申请日：2022-11-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Jianle Chen ,  Haitao Yang

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a video signal partitioned into a chroma block and a first neighboring luma block. The mechanism also includes encoding prediction information for chroma samples of the chroma block into a bitstream. The prediction information for the chroma samples is determined via intra-prediction based on down-sampled neighboring luma samples. The down-sampled neighboring luma samples are generated from a single row of luma samples from the first neighboring luma block. A bitstream including the prediction information for the chroma samples is transmitted to support decoding and display of the chroma samples.