公开(公告)号：US20200336755A1

公开(公告)日：2020-10-22

申请号：US16920209

申请日：2020-07-02

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/46 ,  H04N19/172 ,  H04N19/436 ,  H04N19/139 ,  H04N19/107 ,  H04N19/70

Abstract: A method of video decoding at a decoder can include receiving a bitstream including encoded data of a picture, decoding a plurality of coding units (CUs) in the picture based on motion information stored in a history-based motion vector prediction (HMVP) table, resetting the HMVP table for every N CTU rows. The method also provides updating the HMVP table with the motion information of the last Q of the plurality of CUs.

公开(公告)号：US20190289315A1

公开(公告)日：2019-09-19

申请号：US16295320

申请日：2019-03-07

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Chih-Wei HSU ,  Chun-Chia CHEN

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/577 ,  H04N19/159 ,  H04N19/107 ,  H04N19/70

Abstract: Video processing methods and apparatuses for coding a current block by constructing a candidate set including an average candidate generated from two or more original motion candidates. At least one MV of the average candidate is derived by directly averaging MVs of the original motion candidates in one of list 0 and list 1 without scaling regardless whether the MVs are pointing to same or different reference pictures. A selected candidate is determined from the candidate set as a MVP for a current MV of the current block for encoding or decoding the current block.

公开(公告)号：US20190289294A1

公开(公告)日：2019-09-19

申请号：US16334915

申请日：2017-09-19

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/132 ,  H04N19/46 ,  H04N19/147 ,  H04N19/13 ,  H04N19/186 ,  H04N19/176

Abstract: A video coding system determines a Sample Adaptive Offset (SAO) type for a current reconstructed block, and determines SAO offsets for the current reconstructed block and checks if all SAO offsets are zeros except for a last SAO offset if the SAO type is Edge Offset (EO) or Band Offset (BO). A new value for the last SAO offset is derived at an encoding end or an original value for the last SAO offset is derived at a decoding end if all SAO offsets except for the last SAO offset are zeros. The SAO offsets are used for applying SAO processing to the current block and the current block is encoded or decoded. The original value for the last SAO offset is used in SAO processing and the new value for the last SAO offset is signaled in a video bitstream.

公开(公告)号：US20190222834A1

公开(公告)日：2019-07-18

申请号：US16245967

申请日：2019-01-11

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei HSU ,  Ching-Yeh CHEN

IPC: H04N19/105 ,  H04N19/122 ,  H04N19/149 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/122 ,  H04N19/149 ,  H04N19/176

Abstract: Aspects of the disclosure provide a method for video coding. The method includes determining a set of affine merge candidate (AMC) positions of a set of AMC blocks coded using affine motion models for a current block in a current picture. The set of AMC blocks includes at least one of: a set of AMC side blocks that are spatially neighboring blocks located on one or more sides of the current block in the current picture and an AMC temporal block in a reference picture of the current block. The current block is predicted from the reference picture using a merge mode. The method includes generating a set of affine merge candidates for the current block corresponding to the set of AMC blocks, and constructing a merge candidate list for the current block including the set of affine merge candidates.

公开(公告)号：US20180227593A1

公开(公告)日：2018-08-09

申请号：US15874650

申请日：2018-01-18

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/107 ,  H04N19/139 ,  H04N19/176 ,  H04N19/96

Abstract: Aspects of the disclosure provide a method for video coding in merge mode or skip mode. The method can include receiving a prediction block (PB) of a picture, determining number and positions of merge candidates of the PB according to a size and/or a shape of the PB, and constructing a candidate list including motion data of a subset of the merge candidate positions.

公开(公告)号：US20180199057A1

公开(公告)日：2018-07-12

申请号：US15868995

申请日：2018-01-11

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Chih-Wei HSU ,  Ching-Yeh CHEN

IPC: H04N19/533 ,  H04N19/577 ,  H04N19/573

CPC classification number: H04N19/533 ,  H04N19/523 ,  H04N19/55 ,  H04N19/56 ,  H04N19/573 ,  H04N19/577

Abstract: Method and apparatus of using motion refinement with reduced bandwidth are disclosed. According to one method, a predictor refinement process is applied to generate motion refinement for the current block by searching among multiple motion vector candidates using reference data comprising the target motion-compensated reference block, where if a target motion vector candidate requires target reference data from the target motion-compensated reference block being outside the valid reference block, the target motion vector candidate is excluded from said searching the multiple motion vector candidates or a replacement motion vector candidate closer to a center of the corresponding block of the current block is used as a replacement for the target motion vector candidate. In another method, if a target motion vector candidate belongs to one or more target fractional-pixel locations, a reduced tap-length interpolation filter is applied to the target motion vector candidate.

公开(公告)号：US20180184128A1

公开(公告)日：2018-06-28

申请号：US15844190

申请日：2017-12-15

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/86 ,  H04N19/82 ,  H04N19/96 ,  H04N19/107 ,  H04N19/176

CPC classification number: H04N19/86 ,  H04N19/107 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82 ,  H04N19/96

Abstract: Aspects of the disclosure provide a method for denoising a reconstructed picture in a video coding system. The method can include providing two or more candidate non-local denoising technologies, selecting a target non-local denoising technology from the two or more candidate non-local denoising technologies for a patch group, and denoising the patch group of the reconstructed picture with the target non-local denoising technology. Besides, two parallel processing methods are provided for forming patch groups with predictor-based searching algorithms.

公开(公告)号：US20180131969A1

公开(公告)日：2018-05-10

申请号：US15806632

申请日：2017-11-08

Applicant: MEDIATEK INC.

Inventor： Han HUANG ,  Shan LIU ,  Chih-Wei HSU

IPC: H04N19/86 ,  H04N19/176 ,  H04N19/117 ,  H04N19/196 ,  H04N19/167 ,  H04N19/105

Abstract: Aspects of the disclosure provide a method of video coding includes receiving input data associated with a first block and a second block of an image frame. The method further includes identifying a reference size and performing a deblocking process if it is determined that the deblocking process is to be performed. The preforming the deblocking process may include processing pixels adjacent to the block boundary using a first set of deblocking filter settings if a first block size of the first block and a second block size of the second block are greater than the reference size, and processing the pixels using a second set of deblocking filter settings if the first block size or the second block size is not greater than the reference size.

公开(公告)号：US20170366824A1

公开(公告)日：2017-12-21

申请号：US15525369

申请日：2015-11-26

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/122 ,  H04N19/159 ,  H04N19/625 ,  H04N19/46

CPC classification number: H04N19/61 ,  H04N19/12 ,  H04N19/122 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/625 ,  H04N19/70

Abstract: A method and apparatus for alternative transforms in a video coding system according to a control flag are disclosed. In one embodiment, the control flag for the current PU is determined. If the control flag is on, a first transform is applied to each current TU (transform unit) at an encoder side or an inverse transform of the first transform is applied to each current TU at a decoder side if the current TU has a first boundary type. Furthermore, a second transform is used for each current TU if the current TU has a second boundary type. The first transform is different from the second transform. On the other hand, if the control flag is off, a selected transform is used for each current TU.

公开(公告)号：US20160205403A1

公开(公告)日：2016-07-14

申请号：US15075004

申请日：2016-03-18

Applicant: MediaTek Inc.

Inventor： Yu-Wen HUANG ,  Ching-Yeh CHEN ,  Chih-Ming FU ,  Chih-Wei HSU ,  Yu-Lin CHANG ,  Tzu-Der CHUANG ,  Shaw-Min LEI

IPC: H04N19/174 ,  H04N19/18 ,  H04N19/70 ,  H04N19/13 ,  H04N19/96 ,  H04N19/103 ,  H04N19/159 ,  H04N19/176 ,  H04N19/126 ,  H04N19/119

CPC classification number: H04N19/174 ,  H04N19/103 ,  H04N19/119 ,  H04N19/126 ,  H04N19/13 ,  H04N19/146 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/463 ,  H04N19/70 ,  H04N19/96

Abstract: In one implementation, a method codes video pictures, in which each of the video pictures is partitioned into LCUs (largest coding units). The method operates by receiving a current LCU, partitioning the current LCU adaptively to result in multiple leaf CUs, determining whether a current leaf CU has at least one nonzero quantized transform coefficient according to both Prediction Mode (PredMode) and Coded Block Flag (CBF), and incorporating quantization parameter information for the current leaf CU in a video bitstream, if the current leaf CU has at least one nonzero quantized transform coefficient. If the current leaf CU has no nonzero quantized transform coefficient, the method excludes the quantization parameter information for the current leaf CU in the video bitstream.

Abstract translation: 在一个实现中，一种方法对视频图像进行编码，其中每个视频图像被分割成LCU（最大编码单元）。 该方法通过接收当前LCU进行操作，自适应地划分当前LCU以产生多个叶片，根据预测模式（PredMode）和编码块标志（CBF）确定当前叶CU是否具有至少一个非零量化变换系数， 并且如果当前叶CU具有至少一个非零量化变换系数，则将当前叶CU的量化参数信息合并到视频比特流中。 如果当前叶CU没有非零量化变换系数，则该方法排除了视频比特流中当前叶CU的量化参数信息。