公开(公告)号：US09749635B2

公开(公告)日：2017-08-29

申请号：US15375574

申请日：2016-12-12

Applicant: HFI Innovation Inc.

Inventor： Xun Guo ,  Shaw-Min Lei

IPC: H04N11/02 ,  H04N19/126 ,  H04N19/60 ,  H04N19/136 ,  H04N19/184 ,  H04N19/18

CPC classification number: H04N19/124 ,  H03M7/3059 ,  H04N19/126 ,  H04N19/132 ,  H04N19/136 ,  H04N19/146 ,  H04N19/18 ,  H04N19/184 ,  H04N19/44 ,  H04N19/60

Abstract: A method and apparatus for clipping a transform coefficient are disclosed. In one implementation, a method is implemented in a video encoder for clipping a quantization level. The method operates by generating the quantization level for a transform coefficient of a transform unit by quantizing the transform coefficient according to a quantization matrix and quantization parameter, determining a clipping range in the video encoder for one or a combination of a fixed-range clipping condition and a dynamic-range clipping condition, and clipping the quantization level according to the clipping range to generate a clipping-processed quantization level. The quantization level is clipped within a fixed clipping range from −m to m−1 for the fixed-range clipping condition and m corresponds to 128, 32768, or 2147483648.

公开(公告)号：US09807396B2

公开(公告)日：2017-10-31

申请号：US14372752

申请日：2013-01-16

Applicant: HFI INNOVATION INC.

Inventor： Liang Zhao ,  Xun Guo ,  Shaw-Min Lei

IPC: H04N19/51 ,  H04N19/139 ,  H04N19/52 ,  H04N19/503 ,  H04N19/593 ,  H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/107 ,  H04N19/56 ,  H04N19/70

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/107 ,  H04N19/176 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/56 ,  H04N19/593 ,  H04N19/70

Abstract: A method and apparatus for deriving a motion vector predictor (MVP) candidate set for motion vector coding of a current block. Embodiments according to the present invention determine a redundancy-removed spatial MVP candidate set by removing any redundant MVP candidate from the spatial MVP candidate set. The redundancy-removal process does not apply to the temporal MVP candidate. In another embodiment of the present invention, a redundancy-removed spatial-temporal MVP candidate set is determined and the number of candidates in the redundancy-removed spatial-temporal MVP candidate set is checked to determine whether it is smaller than a threshold. If the number of candidates is smaller than the threshold, a zero motion vector is added to the redundancy-removed spatial-temporal MVP candidate set. The redundancy-removed spatial-temporal MVP candidate set is then provided for encoding or decoding of the motion vector of the current block.

公开(公告)号：US10701355B2

公开(公告)日：2020-06-30

申请号：US16378781

申请日：2019-04-09

Applicant: HFI Innovation Inc.

Inventor： Mei Guo ,  Xin Zhao ,  Xun Guo ,  Shaw-Min Lei

IPC: H04N19/105 ,  H04N19/157 ,  H04N19/182 ,  H04N19/593 ,  H04N19/14 ,  H04N19/176

Abstract: A method and apparatus for intra prediction for a current block using directional intra prediction based on neighboring pixels around the current block are disclosed. Embodiment according to the present invention derives the gradient for the current pixel from the neighboring reconstructed pixels along a prediction direction of directional intra prediction. The gradient derived is used to form the final intra prediction. In another embodiment of the present invention, the intra prediction for slant vertical and horizontal directions is derived based on the neighboring reconstructed pixels in a neighboring row adjacent to the top side of the current block and the neighboring reconstructed pixels in a neighboring column adjacent to the left side of the current block.

公开(公告)号：US10003798B2

公开(公告)日：2018-06-19

申请号：US15375596

申请日：2016-12-12

Applicant: HFI Innovation Inc.

Inventor： Chih-Wei Hsu ,  Qian Huang ,  Jicheng An ,  Xun Guo ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC: H04N19/117 ,  H04N19/50 ,  H04N19/176 ,  H04N19/14 ,  H04N19/186 ,  H04N19/82 ,  H04N19/86

CPC classification number: H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186 ,  H04N19/50 ,  H04N19/82 ,  H04N19/86

Abstract: A method and apparatus for deblocking reconstructed video in a video coding system. The method receives reconstructed pixel data, wherein the reconstructed pixel data is configured into LCUs (largest coding units) and each LCU is divided into blocks. The method then identifies horizontal block edges of the blocks in the LCUs, applies first vertical filtering to the reconstructed pixel data corresponding to one or more first lines above a first horizontal block edge in the first edge group, and applies second vertical filtering to the reconstructed pixel data corresponding to one or more second lines above a second horizontal block edge in the second edge group, wherein a first number of said one or more first lines is smaller than a second number of said one or more second lines.

公开(公告)号：US09832461B2

公开(公告)日：2017-11-28

申请号：US14239531

申请日：2012-10-29

Applicant: HFI INNOVATION INC.

Inventor： Xun Guo ,  Jicheng An ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC: H04N7/12 ,  H04N11/02 ,  H04N19/86 ,  H04N19/159 ,  H04N19/176 ,  H04N19/117 ,  H04N19/82

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/86

Abstract: A method and apparatus for deblocking of reconstructed video in a video coding system are disclosed. Embodiments according to the present invention determine boundary strength between two blocks without checking whether the block boundary is a coding unit (CU) boundary. In one embodiment according to the present invention, the method comprises determining whether any of the two blocks is Intra coded. If any of the two blocks is Intra coded, the boundary strength is assigned a first value. Otherwise, additional decision processing is performed to determine the boundary strength. In another embodiment, said determining the boundary strength for the block boundary comprises determining whether the block boundary is a TU boundary and whether any of the two blocks contains coefficients. In yet another embodiment, said determining the boundary strength for the block boundary comprises determining whether the two blocks have different reference pictures or different motion vectors.

公开(公告)号：US09565441B2

公开(公告)日：2017-02-07

申请号：US15079341

申请日：2016-03-24

Applicant: HFI INNOVATION INC.

Inventor： Xun Guo ,  Shaw-Min Lei

IPC: H04N11/02 ,  H04N19/124 ,  H04N19/126 ,  H04N19/136 ,  H04N19/60 ,  H03M7/30 ,  H04N19/132 ,  H04N19/146 ,  H04N19/18 ,  H04N19/44

CPC classification number: H04N19/124 ,  H03M7/3059 ,  H04N19/126 ,  H04N19/132 ,  H04N19/136 ,  H04N19/146 ,  H04N19/18 ,  H04N19/184 ,  H04N19/44 ,  H04N19/60

Abstract: A method and apparatus for clipping a transform coefficient are disclosed. In one implementation, a method is implemented in a video encoder for clipping a quantization level. The method operates by generating the quantization level for a transform coefficient of a transform unit by quantizing the transform coefficient according to a quantization matrix and quantization parameter, determining a clipping condition in the video encoder based on video source bit-depth, and clipping the quantization level according to the clipping condition to generate a clipping-processed quantization level.

Abstract translation: 公开了一种用于剪切变换系数的方法和装置。 在一个实现中，在视频编码器中实现一种用于削波量化级别的方法。 该方法通过根据量化矩阵和量化参数对变换系数进行量化，基于视频源位深度确定视频编码器中的限幅条件，并对量化进行削波来生成变换单元的变换系数的量化级 根据削波条件产生削波处理量化电平。

公开(公告)号：US10531122B2

公开(公告)日：2020-01-07

申请号：US15895314

申请日：2018-02-13

Applicant: HFI Innovation Inc.

Inventor： Liang Zhao ,  Jicheng An ,  Xin Zhao ,  Xun Guo

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96 ,  H04N19/132 ,  H04N19/186

Abstract: A method includes receiving the video bitstream from a media or a processor, recovering a first coded block flag (cbf) from the video bitstream based on a context-based adaptive binary arithmetic coding (CABAC) decoding process according to a first context formation, wherein the first cbf is associated with a first transform unit (TU) of a first color component, and the first cbf indicates whether the first TU of the first color component has at least one non-zero transform coefficient, and recovering a second cbf from the video bitstream based on the CABAC decoding process according to a second context formation, wherein the second cbf is associated with a second TU of a second color component, and the second cbf indicates whether the second TU of the second color component has at least one non-zero transform coefficient.

公开(公告)号：US09930330B2

公开(公告)日：2018-03-27

申请号：US14372696

申请日：2013-01-07

Applicant: HFI INNOVATION INC.

Inventor： Liang Zhao ,  Jicheng An ,  Xin Zhao ,  Xun Guo

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96 ,  H04N19/132 ,  H04N19/60

CPC classification number: H04N19/60 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/96

Abstract: A method and an apparatus for decoding of a video bitstream are disclosed. In one embodiment, the method comprises: decoding a first coded block flag (cbf) of the color component indicating whether a current coding unit (CU) of the color component has at least one non-zero transform coefficient (830). According to the first cbf of the color component, the method further comprises decoding four second cbfs, each indicating whether one of four sub-blocks in the current CU of the color component has at least one non-zero transform coefficient (850). The residual quad-tree (RQT) of the current CU of the color component is determined based on the first cbf of the color component (870), or based on the first cbf and the second cbfs of the color component if the second cbfs exist (860). In another embodiment, the method comprises decoding a cbf associated with a transform unit (TU) and determining RQT of the TU based on the cbf, wherein said determining the RQT of the TU based on the cbf is the same for a luma component and a chroma component and the cbf is recovered from the video bitstream.

公开(公告)号：US09912952B2

公开(公告)日：2018-03-06

申请号：US15064818

申请日：2016-03-09

Applicant: HFI INNOVATION INC.

Inventor： Liang Zhao ,  Xun Guo ,  Shaw-Min Lei

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/139 ,  H04N19/52 ,  H04N19/503 ,  H04N19/593 ,  H04N19/51 ,  H04N19/513 ,  H04N19/176 ,  H04N19/107 ,  H04N19/56 ,  H04N19/70

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/107 ,  H04N19/176 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/56 ,  H04N19/593 ,  H04N19/70

Abstract: A method and apparatus for deriving a motion vector predictor (MVP) candidate set for motion vector coding of a current block. Embodiments according to the present invention determine a redundancy-removed spatial-temporal MVP candidate set. The redundancy-removed spatial-temporal MVP candidate set is derived from a spatial-temporal MVP candidate set by removing any redundant MVP candidate. The spatial-temporal MVP candidate set includes a top spatial MVP candidate, a left spatial MVP candidate and one temporal MVP candidate. The method further checks whether candidate number of the redundancy-removed spatial-temporal MVP candidate set is smaller than a threshold, and adds a zero motion vector to the redundancy-removed spatial-temporal MVP candidate set if the candidate number is smaller than the threshold. Finally, the method provides the redundancy-removed spatial-temporal MVP candidate set for encoding or decoding of the motion vector of a current block.

公开(公告)号：US10484680B2

公开(公告)日：2019-11-19

申请号：US16049851

申请日：2018-07-31

Applicant: HFI INNOVATION INC.

Inventor： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

IPC: H04N19/105 ,  H04N19/91 ,  H04N19/70 ,  H04N19/593 ,  H04N19/11 ,  H04N19/176 ,  H04N19/157 ,  H04N19/463

Abstract: The present disclosure describes a method of decoding a block, and the method includes receiving a flag indicating whether a current intra prediction mode is equal to any of one or more most probable modes, deriving, based on a value of the flag, the current intra prediction mode from a decoded mode index, and decoding the block according to the current intra prediction mode. The current intra prediction mode belongs to a mode set that includes a DC mode, a Planar mode, and at least one directional mode. The deriving the current intra prediction mode includes, when the mode index corresponds to a first mode index value representing the Planar mode, deriving the current intra prediction mode to be the Planar mode; and, when the mode index corresponds to a second mode index value representing the DC mode, deriving the current intra prediction mode to be the DC mode.