公开(公告)号：US20190335172A1

公开(公告)日：2019-10-31

申请号：US16212094

申请日：2018-12-06

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Xiang LI ,  Shan LIU ,  Liang ZHAO

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/44 ,  H04N19/64 ,  H04N19/12 ,  H04N19/176

Abstract: A method of and an apparatus for controlling intra and/or inter prediction for decoding of a video sequence are provided. The method includes determining whether a width or a height of a coding unit is a power of two, and based on the width or the height of the coding unit being determined to not be a power of two, splitting the coding unit into sub-blocks, each of the sub-blocks having a width or a height that is a power of two and maximized, so that a number of the sub-blocks is minimized. The method further includes applying the intra and/or inter prediction on the sub-blocks into which the coding unit is split.

公开(公告)号：US20190306521A1

公开(公告)日：2019-10-03

申请号：US16232757

申请日：2018-12-26

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Xiang LI ,  Shan LIU

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/18 ,  H04N19/593 ,  H04N19/91

Abstract: A method of and an apparatus for controlling intra and/or inter prediction for decoding of a video sequence are provided. The method includes receiving a transform index which indicates a transform selection used for decoding an image block; binarizing a transform index using a preset number of bins; for each of a selected set of bins of the binarized transform index, identifying a group of non-zero transform coefficients in a transform coefficient block; and based on a value of a first bin of the selected set of bins of the binarized transform index and a value of a second bin of the selected set of bins of the binarized transform index, reversing a sign of the identified group of non-zero transform coefficients in the transform coefficient block.

公开(公告)号：US20190306498A1

公开(公告)日：2019-10-03

申请号：US16200533

申请日：2018-11-26

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Xiang LI ,  Shan LIU ,  Liang ZHAO

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/184

Abstract: Aspects of the disclosure provide method and apparatus for video coding. In some examples, an apparatus includes receiving circuitry and processing circuitry. The processing circuitry decodes prediction information of a block from a coded video bitstream. The prediction information is indicative of a reference line selected from a plurality of potential reference lines and an intra prediction mode selected from a set of potential intra prediction modes that is associated with the reference line. Then the processing circuitry reconstructs at least one sample of the block according to the intra prediction mode and at least one reference sample in the reference line.

公开(公告)号：US20190281289A1

公开(公告)日：2019-09-12

申请号：US16223872

申请日：2018-12-18

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Xiang LI ,  Shan LIU ,  Liang ZHAO

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/196

Abstract: A method of and an apparatus for controlling intra and/or inter prediction for decoding of a video sequence are provided. The method includes determining a total number of intra prediction modes for a current block, a number of Most Probable Modes (MPMs) in the current block, and a number of non-MPMs in the current block, wherein the total number of intra prediction modes for the current block is equal to a sum of the number of MPMs in the current block and the number of non-MPMs in the current block. The method further includes adjusting the total number of intra prediction modes to a value such that the number of non-MPMs is a power of 2 or a sum of multiple power of 2.

公开(公告)号：US20250168402A1

公开(公告)日：2025-05-22

申请号：US18657710

申请日：2024-05-07

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Han Gao ,  Liang Zhao ,  Shan Liu

IPC: H04N19/597 ,  H04N19/117 ,  H04N19/172 ,  H04N19/82

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a multi-view video bitstream comprising a plurality of pictures. The plurality of pictures includes a first picture corresponding to a first view and a second picture corresponding to a second view. The method includes determining, based on a first indicator in the multi-view video bitstream, whether loop filtering parameters for the first picture corresponding to the first view and the second picture corresponding to the second view are signaled jointly or separately. The method includes, in accordance with the first indicator indicating that the loop filtering parameters are signaled jointly, performing a first loop filtering process on the first picture and a second loop filtering process on the second picture using a shared set of loop filtering parameters.

公开(公告)号：US20250159207A1

公开(公告)日：2025-05-15

申请号：US18633360

申请日：2024-04-11

Applicant: Tencent America LLC.

Inventor： Liang ZHAO ,  Xin ZHAO ,  Han GAO ,  Jing YE ,  Shan LIU

IPC: H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/66

Abstract: An example method of video coding includes receiving a video bitstream for a plurality of coding blocks. The method also includes identifying, based on a first indicator in the video bitstream, a coding region that includes two or more coding blocks of the plurality of coding blocks, where each coding block in the coding region is encoded in an intra prediction mode. The method further includes applying a first partitioning for luma blocks in the coding region, applying a second partitioning for chroma blocks in the coding region, where the second partitioning is different from the first partitioning, and reconstructing the two or more coding blocks of the coding region using the first partitioning and the second partitioning.

公开(公告)号：US20250142071A1

公开(公告)日：2025-05-01

申请号：US18669375

申请日：2024-05-20

Applicant: Tencent America LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Han GAO ,  Jing YE ,  Shan LIU

IPC: H04N19/129 ,  H04N19/105 ,  H04N19/176

Abstract: An example method of video coding includes receiving a video bitstream that includes a plurality of blocks. The method also includes determining a scanning order for a motion vector list for a first block of the plurality of blocks based on one or more of: a number of neighboring blocks of the current block with corresponding temporal motion vectors, a number of neighboring blocks of the current block encoded in an inter prediction mode, a mode of the current block, and a reference frame index for the current block. The method further includes generating the motion vector list according to the scanning order and identifying, from the motion vector list, a motion vector predictor for the current block. The method also includes decoding the current block using the identified motion vector predictor.

公开(公告)号：US20250113036A1

公开(公告)日：2025-04-03

申请号：US18756233

申请日：2024-06-27

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Ding DING ,  Shan LIU

IPC: H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/50 ,  H04N19/70 ,  H04N19/82

Abstract: This disclosure relates generally to sample clipping in video or image and particularly to methods and systems for sample clipping in video or image based on Low Dynamic Range (LDR) coding. For example, an encoder or decoder may determine a sample clipping range for a bock and apply a sample clipping procedure based on the sample clipping range during one of various stages of encoding or decoding process of the block. The sample clipping range may be derived from an LDR selected for encoding the block.

公开(公告)号：US20250113035A1

公开(公告)日：2025-04-03

申请号：US18756191

申请日：2024-06-27

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Ding DING ,  Shan LIU

IPC: H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189 ,  H04N19/42 ,  H04N19/70

Abstract: This disclosure relates generally to video coding and particularly to methods and systems for sample mapping in image and video coding using Low Dynamic Range (LDR) samples. For example, the disclosure describes implementations of mapping functions for conversion of samples from an original bit depth to an LDR bit depth during an encoding and decoding process of videos or images and the signaling of such mapping functions in a bitstream.

公开(公告)号：US20250106404A1

公开(公告)日：2025-03-27

申请号：US18633217

申请日：2024-04-11

Applicant: TENCENT AMERICA LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Han GAO ,  Jing YE ,  Madhu PERINGASSERY KRISHNAN ,  Yushin CHO ,  Shan LIU

IPC: H04N19/159 ,  H04N19/103 ,  H04N19/186 ,  H04N19/70

Abstract: This disclosure relates generally to video coding and particularly to methods, devices, and systems for signaling prediction modes in recursively partitioned video frames. For example, a regional prediction mode flag syntax element may be introduced for indicating whether an entire coding region of a video frame signaled as being of a first predefined prediction mode is entirely coded in a second predefined prediction mode or not. The signaling schemes described in this disclosure facilitate reducing signaling overhead in video frames that employ a mix of different prediction modes.