公开(公告)号：US10091531B2

公开(公告)日：2018-10-02

申请号：US15492868

申请日：2017-04-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haitao Yang ,  Jiantong Zhou

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/463 ,  H04N19/126 ,  H04N19/136 ,  H04N19/91

Abstract: An embodiment of the present invention provides an image coding method, where the coding method includes: performing predictive coding on an image; performing transform coding on the image on which the predictive coding has been performed; performing, by using a quantization matrix, quantization coding on the image on which the transform coding has been performed, where the quantization matrix is a matrix reflecting image quantization step information, the quantization matrix includes an M*N quantization matrix and an N*M quantization matrix, and the N*M quantization matrix is obtained by transposing the M*N quantization matrix; and performing entropy coding on the image on which the quantization coding has been performed, and coding the M*N quantization matrix, so as to generate a code stream. In the present invention, the number of bits required for coding a quantization matrix is effectively saved, thereby improving compression efficiency.

公开(公告)号：US20180131932A1

公开(公告)日：2018-05-10

申请号：US15864493

申请日：2018-01-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Sixin Lin ,  Mingyuan Yang ,  Haoping Yu ,  Jiantong Zhou ,  Cunbin Pan

IPC: H04N19/109 ,  G06T9/00 ,  H04N19/577 ,  H04N19/56 ,  H04N19/117 ,  H04N19/523 ,  H04N19/149 ,  H04N19/53

CPC classification number: H04N19/109 ,  G06T9/004 ,  H04N19/117 ,  H04N19/149 ,  H04N19/523 ,  H04N19/53 ,  H04N19/56 ,  H04N19/577

Abstract: A method and device for generating a predicted value of image to generate a predicted value of a current block during image encoding or decoding is disclosed, where the method includes determining a searching scope, wherein a plurality of motion vectors are included in the searching scope, performing up-sampling interpolations on first reference blocks corresponding to the motion vector in the searching scope, in a reference image of the current block using a first filter to obtain up-sampled first reference blocks, obtaining, using the up-sampled first reference blocks, at least one candidate motion vector corresponding to the current block, performing up-sampling interpolations on second reference blocks, corresponding to the at least one candidate motion vector, in the reference image of the current block using a second filter to obtain up-sampled second reference blocks, combining the up-sampled second reference blocks to obtain a predicted value of the current block.

公开(公告)号：US09900601B2

公开(公告)日：2018-02-20

申请号：US15254669

申请日：2016-09-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xingyu Zhang ,  Oscar Au ,  Haitao Yang ,  Jiantong Zhou

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/186 ,  H04N19/59 ,  H04N19/14

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186 ,  H04N19/59 ,  H04N19/593

Abstract: An intra-frame decoding method includes obtaining, from a video code stream, prediction mode information of a first signal component of a current block; determining a prediction mode of the first signal component of the current block from a prediction mode set of the first signal component of the current block according to the prediction mode information of the first signal component of the current block, where the prediction mode set of the first signal component of the current block includes at least one of a linear model above (LMA) mode and a linear model left (LML) mode; obtaining a predicted value of a first signal component sampling point of the current block; and obtaining a reconstructed value of the first signal component sampling point of the current block according to the predicted value of the first signal component sampling point of the current block.

公开(公告)号：US20170310962A1

公开(公告)日：2017-10-26

申请号：US15649412

申请日：2017-07-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haitao Yang ,  Bin Li ,  Houqiang Li ,  Jiantong Zhou

IPC: H04N19/11 ,  H04N19/463 ,  H04N19/46 ,  H04N19/44 ,  H04N19/196 ,  H04N19/186 ,  H04N19/176 ,  H04N19/593 ,  H04N19/159

CPC classification number: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/44 ,  H04N19/46 ,  H04N19/463 ,  H04N19/593

Abstract: Embodiments of the present invention provide an encoding or decoding method and apparatus. The method includes: extracting first information in a bitstream; determining a chroma component intra prediction mode according to the first information; when the chroma component intra prediction mode cannot be determined according to the first information, extracting second information in the bitstream; and determining the chroma component intra prediction mode according to the second information, where the first information includes information for indicating whether the chroma component intra prediction mode is a DM mode or an LM mode, the second information is used to indicate a remaining mode as the chroma component intra prediction mode, and the remaining mode is one of available chroma component intra prediction modes other than a mode that may be determined according to the first information.

公开(公告)号：US09667958B2

公开(公告)日：2017-05-30

申请号：US14268115

申请日：2014-05-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haitao Yang ,  Jiantong Zhou

IPC: H04N19/126 ,  H04N19/176 ,  H04N19/463 ,  H04N19/136 ,  H04N19/61

CPC classification number: H04N19/61 ,  H04N19/126 ,  H04N19/136 ,  H04N19/176 ,  H04N19/463 ,  H04N19/91

Abstract: An embodiment of the present invention provides an image coding method, where the coding method includes: performing predictive coding on an image; performing transform coding on the image on which the predictive coding has been performed; performing, by using a quantization matrix, quantization coding on the image on which the transform coding has been performed, where the quantization matrix is a matrix reflecting image quantization step information, the quantization matrix includes an M*N quantization matrix and an N*M quantization matrix, and the N*M quantization matrix is obtained by transposing the M*N quantization matrix; and performing entropy coding on the image on which the quantization coding has been performed, and coding the M*N quantization matrix, so as to generate a code stream. In the present invention, the number of bits required for coding a quantization matrix is effectively saved, thereby improving compression efficiency.

公开(公告)号：US20160241851A1

公开(公告)日：2016-08-18

申请号：US15135913

申请日：2016-04-22

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Sixin Lin ,  Mingyuan Yang ,  Haoping Yu ,  Jiantong Zhou ,  Cunbin Pan

IPC: H04N19/109 ,  H04N19/149 ,  H04N19/577 ,  H04N19/53 ,  H04N19/56 ,  H04N19/117 ,  H04N19/523

CPC classification number: H04N19/109 ,  G06T9/004 ,  H04N19/117 ,  H04N19/149 ,  H04N19/523 ,  H04N19/53 ,  H04N19/56 ,  H04N19/577

Abstract: A method and device for generating a predicted value of image that are mostly used to generate a predicted value of a current block during image encoding or decoding. The method includes: determining a searching scope, wherein multiple motion vectors are included in the searching scope; performing up-sampling interpolations on first reference blocks, corresponding to the motion vector in the searching scope, in a reference image of the current block by using a first filter to obtain up-sampled first reference blocks; by using the up-sampled first reference blocks, obtaining at least one candidate motion vector corresponding to the current block; performing up-sampling interpolations on second reference blocks, corresponding to the at least one candidate motion vector, in the reference image of the current block by using a second filter to obtain up-sampled second reference blocks; combining the up-sampled second reference blocks to obtain a predicted value of the current block.

公开(公告)号：US09124900B2

公开(公告)日：2015-09-01

申请号：US14317040

申请日：2014-06-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao Yang ,  Bin Li ,  Houqiang Li ,  Jiantong Zhou

IPC: H04N7/12 ,  H04N19/593 ,  H04N19/176 ,  H04N19/46 ,  H04N19/11 ,  H04N19/186 ,  H04N19/44

CPC classification number: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/44 ,  H04N19/46 ,  H04N19/463 ,  H04N19/593

Abstract: Embodiments of the present invention provide an encoding or decoding method and apparatus. The method includes: extracting first information in a bitstream; determining a chroma component intra prediction mode according to the first information; when the chroma component intra prediction mode cannot be determined according to the first information, extracting second information in the bitstream; and determining the chroma component intra prediction mode according to the second information, where the first information includes information for indicating whether the chroma component intra prediction mode is a DM mode or an LM mode, the second information is used to indicate a remaining mode as the chroma component intra prediction mode, and the remaining mode is one of available chroma component intra prediction modes other than a mode that may be determined according to the first information.

Abstract translation: 本发明的实施例提供一种编码或解码方法和装置。 该方法包括：提取比特流中的第一信息; 根据第一信息确定色度分量帧内预测模式; 当色度分量帧内预测模式不能根据第一信息确定时，提取比特流中的第二信息; 以及根据所述第二信息确定色度分量帧内预测模式，其中所述第一信息包括用于指示所述色度分量帧内预测模式是DM模式还是LM模式的信息，所述第二信息用于将剩余模式指示为 色度分量帧内预测模式，并且剩余模式是可以根据第一信息确定的模式之外的可用色度分量帧内预测模式之一。

公开(公告)号：US08891889B2

公开(公告)日：2014-11-18

申请号：US13848301

申请日：2013-03-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haoping Yu ,  Xiaozhen Zheng ,  Sixin Lin ,  Jiantong Zhou

IPC: G06K9/36 ,  G06K9/46 ,  G06T9/00 ,  H04N19/46 ,  H04N19/537 ,  H04N19/119 ,  H04N19/172

CPC classification number: G06T9/004 ,  G06T9/00 ,  H04N19/119 ,  H04N19/172 ,  H04N19/46 ,  H04N19/537

Abstract: Image encoding and decoding methods and related devices are provided. An image encoding and decoding method includes: for a sub-image block obtained by partitioning an image block, determining at least two position parameters, in which the at least two position parameters include a first position parameter and a second position parameter, the first position parameter identifies whether the sub-image block is a rectangle or not a rectangle, and the second position parameter identifies endpoint information of the sub-image block; determining an encoding sequence of the first position parameter and the second position parameter according to a partition manner of the image block; and encoding the at least two position parameters according to the determined encoding sequence.

Abstract translation: 提供图像编码和解码方法及相关设备。 图像编码和解码方法包括：对于通过划分图像块获得的子图像块，确定至少两个位置参数，其中所述至少两个位置参数包括第一位置参数和第二位置参数，所述第一位置 参数识别子图像块是矩形还是矩形，第二位置参数识别子图像块的端点信息; 根据图像块的分割方式确定第一位置参数和第二位置参数的编码序列; 以及根据所确定的编码序列对所述至少两个位置参数进行编码。

公开(公告)号：US08718389B2

公开(公告)日：2014-05-06

申请号：US13848308

申请日：2013-03-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haoping Yu ,  Xiaozhen Zheng ,  Sixin Lin ,  Jiantong Zhou

IPC: G06K9/36 ,  G06T9/00

CPC classification number: G06T9/004 ,  G06T9/00 ,  H04N19/119 ,  H04N19/172 ,  H04N19/46 ,  H04N19/537

Abstract: Image encoding and decoding methods and related devices are provided. An image encoding and decoding method includes: for a sub-image block obtained by partitioning an image block, determining at least two position parameters, in which the at least two position parameters include a first position parameter and a second position parameter, the first position parameter identifies whether the sub-image block is a rectangle or not a rectangle, and the second position parameter identifies endpoint information of the sub-image block; determining an encoding sequence of the first position parameter and the second position parameter according to a partition manner of the image block; and encoding the at least two position parameters according to the determined encoding sequence.

公开(公告)号：US11875487B2

公开(公告)日：2024-01-16

申请号：US17720534

申请日：2022-04-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Quanhe Yu ,  Haitao Yang ,  Jiantong Zhou

IPC: G06T7/90 ,  G09G5/10 ,  G06T5/00

CPC classification number: G06T5/009 ,  G06T7/90 ,  G09G5/10 ,  G06T2207/10024 ,  G06T2207/20208 ,  G09G2320/0233

Abstract: A high dynamic range image processing method and apparatus, to improve a display effect of a high dynamic range image. The method includes: obtaining image information of a to-be-processed high dynamic range (HDR) image, the image information includes a maximum RGB component value of a first pixel corresponding to a first percentage and a maximum RGB component value of a second pixel corresponding to a second percentage; determining a maximum reference value of the HDR image; determining a maximum luminance modification value of the HDR image based on the maximum reference value and a plurality of preset hierarchy intervals, where the maximum luminance modification value is used to modify a largest value in maximum RGB component values of the plurality of pixels included in the HDR image; and adjusting a dynamic range of the HDR image based on the maximum luminance modification value.