公开(公告)号：US11172203B2

公开(公告)日：2021-11-09

申请号：US16047506

申请日：2018-07-27

Applicant: MediaTek Inc.

Inventor： Man-Shu Chiang ,  Chih-Wei Hsu

IPC: H04N19/107 ,  H04N19/109 ,  H04N19/139 ,  H04N19/196 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: A combined prediction mode for encoding or decoding a pixel block of a video picture is provided. When it is determined that the combined prediction mode is used, a video codec generates an intra predictor for the current block based on a selected intra-prediction mode and a merge-indexed predictor for the current block based on a selected merge candidate from a merge candidates list. The video codec then generates a final predictor for the current block based on the intra predictor and the merge-indexed predictor. The final predictor is then used to encode or decode the current block.

公开(公告)号：US11128868B2

公开(公告)日：2021-09-21

申请号：US16895073

申请日：2020-06-08

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi Lin ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/132 ,  H04N19/105 ,  G06F17/16 ,  H04N19/159 ,  H04N19/176

Abstract: Method and apparatus of video coding are disclosed. According to one method, the left reference boundary samples and the top reference boundary samples are checked jointly. According to another method, selected original left reference boundary samples and selected original top reference boundary samples at specific positions are used for predictor up-sampling. According to yet another method, the horizontal interpolation and the vertical interpolation are in a fixed order regardless of a shape of the current block, size of the current block or both.

公开(公告)号：US10979707B2

公开(公告)日：2021-04-13

申请号：US15757694

申请日：2016-09-05

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh Chen ,  Chih-Wei Hsu ,  Han Huang ,  Yu-Wen Huang

IPC: H04N19/109 ,  H04N19/176 ,  H04N19/117 ,  H04N19/577 ,  H04N19/59 ,  H04N19/82 ,  H04N19/14 ,  H04N19/137

Abstract: A method and apparatus of video coding using adaptive Inter prediction are disclosed. A selected Inter prediction process is determined, wherein the selected Inter prediction process selects an Inter prediction filter from multiple Inter prediction filters for the current block depending on first pixel data comprising neighbouring reconstructed pixels (NRP) of the current block. The selected Inter prediction process may be further determined depending on extra motion compensated pixels (EMCP) around a motion-compensated reference block corresponding to the current block. Distortion between the NRP and EMCP can be used to determine the selected Inter prediction filter. The distortion can be calculated using a sum of absolute differences or squared differences between the NRP and the EMCP.

公开(公告)号：US20200275112A1

公开(公告)日：2020-08-27

申请号：US16802448

申请日：2020-02-26

Applicant: MediaTek Inc.

Inventor： Man-Shu Chiang ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Chia-Ming Tsai

IPC: H04N19/44 ,  H04N19/107 ,  H04N19/159 ,  H04N19/176

Abstract: A video decoder that implements a mutually exclusive grouping of coding modes is provided. The video decoder receives data for a block of pixels to be decoded as a current block of a current picture of a video. When a first coding mode for the current block is enabled, a second coding mode is disabled for the current block, wherein the first and second coding modes specify different methods for computing an inter-prediction for the current block. The current block is decoded by using an inter-prediction that is computed according to an enabled coding mode.

公开(公告)号：US10743016B2

公开(公告)日：2020-08-11

申请号：US16503758

申请日：2019-07-05

Applicant: MEDIATEK INC.

Inventor： Chen-yen Lai ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/46 ,  H04N19/139 ,  H04N19/172 ,  H04N19/436 ,  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 without updating the HMVP table, and updating the HMVP table with motion information of all or a part of the plurality of CUs after the plurality of CUs are decoded based on the motion information stored in the HMVP table.

公开(公告)号：US10701393B2

公开(公告)日：2020-06-30

申请号：US16611611

申请日：2018-05-08

Applicant: MEDIATEK INC.

Inventor： Chun-Chia Chen ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Tzu-Der Chuang

IPC: H04N19/56 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52 ,  H04N19/82 ,  H04N19/523

Abstract: Method and apparatus of Inter prediction for video coding performed by a video encoder or a video decoder that utilizes motion vector prediction (MVP) to code a motion vector (MV) associated with a block coded with Inter mode are disclosed. According to one method, an initial MVP candidate list is generated for the current block. When candidate reordering is selected for the current block, target candidates within a selected candidate set are reordered to generate a reordered MVP candidate list and then the current block is encoded at the video encoder side or decoded at the video decoder sider using the reordered MVP candidate list, where the selected candidate set comprises at least partial candidates of the initial MVP candidate list.

公开(公告)号：US20200154125A1

公开(公告)日：2020-05-14

申请号：US16743631

申请日：2020-01-15

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/51 ,  H04N19/52 ,  H04N19/513 ,  H04N19/119 ,  H04N19/573 ,  H04N19/70 ,  H04N19/176 ,  G06F16/783

Abstract: Aspects of the disclosure provide a video coding method for processing a current prediction unit (PU) with a sub-PU temporal motion vector prediction (TMVP) mode. The method can include receiving the current PU including sub-PUs, determining an initial motion vector that is a motion vector of a spatial neighboring block of the current PU, performing a searching process to search for a main collocated picture in a sequence of reference pictures of the current PU based on the initial motion vector, and obtaining collocated motion information in the main collocated picture for the sub-PUs of the current PU. The searching process can include turning on motion vector scaling operation for searching a subset of the sequence of reference pictures, and turning off the motion vector scaling operation for searching the other reference pictures in the sequence of reference pictures.

公开(公告)号：US10419758B2

公开(公告)日：2019-09-17

申请号：US15918646

申请日：2018-03-12

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh Chen ,  Tzu Der Chuang ,  Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N19/117 ,  H04N19/154 ,  H04N19/182 ,  H04N19/172 ,  H04N19/82 ,  H04N19/119 ,  H04N19/597 ,  H04N19/176 ,  H04N19/14 ,  H04N19/17

Abstract: Aspects of the disclosure provide a method for non-local adaptive loop filtering. The method can include receiving reconstructed picture, dividing the picture into current patches, forming patch groups each including a current patch and a number of reference patches, determining a noise level for each of the patch groups, and denoising the patch groups with a non-local denoising technology. The determining a noise level for each of the patch groups can include calculating a pixel variance for a respective patch group, determining a pixel standard deviation (SD) of the respective patch group according to the calculated pixel variance by searching in a lookup table that indicates mapping relationship between patch group pixel SDs and patch group pixel variances, and calculating a noise level for the respective patch group based on a compression noise model that is a function of the pixel SD.

公开(公告)号：US20190268611A1

公开(公告)日：2019-08-29

申请号：US16280037

申请日：2019-02-20

Applicant: MediaTek Inc.

Inventor： Chun-Chia Chen ,  Chih-Wei Hsu

IPC: H04N19/196 ,  H04N19/176 ,  H04N19/103 ,  H04N19/157 ,  H04N19/46

Abstract: A video codec that intelligently assigns a mode setting to a current block of pixels of a video picture of a video sequence when the current block is encoded or decoded by merge mode is provided. The current block has one or more coded neighboring blocks. Each coded neighboring block of the one or more coded neighboring blocks is coded by applying a respective mode setting that is specified for each neighboring block of the one or more coded neighboring blocks. The video codec identifies a set of one or more candidate predictors. The video codec specifies a mode setting for the current block based on the selected candidate predictor and mode settings that are specified for the one or more coded neighboring blocks. The video codec encodes or decodes the current block by using a selected candidate predictor and applying the mode setting specified for the current block.

公开(公告)号：US20150098513A1

公开(公告)日：2015-04-09

申请号：US14403186

申请日：2013-04-02

Applicant: MEDIATEK INC.

Inventor： Chih-Ming Fu ,  Yu-Wen Huang ,  Chih-Wei Hsu ,  Shaw-Min Lei

IPC: H04N19/70 ,  H04N19/44

CPC classification number: H04N19/70 ,  H04N19/13 ,  H04N19/44 ,  H04N19/86 ,  H04N19/91

Abstract: A method and apparatus for sharing context among different SAO syntax elements for a video coder are disclosed. Embodiments of the present invention apply CABAC coding to multiple SAO syntax elements according to a joint context model, wherein the multiple SAO syntax elements share the joint context. The multiple SAO syntax elements may correspond to SAO merge left flag and SAO merge up flag. The multiple SAO syntax elements may correspond to SAO merge left flags or merge up flags associated with different color components. The joint context model can be derived based on joint statistics of the multiple SAO syntax elements. Embodiments of the present invention code the SAO type index using truncated unary binarization, using CABAC with only one context, or using CABAC with context mode for the first bin associated with the SAO type index and with bypass mode for any remaining bin.

Abstract translation: 公开了一种用于在视频编码器的不同SAO语法元素之间共享上下文的方法和装置。 本发明的实施例根据联合上下文模型将CABAC编码应用于多个SAO语法元素，其中多个SAO语法元素共享联合上下文。 多个SAO语法元素可以对应于SAO合并左标志和SAO合并标志。 多个SAO语法元素可以对应于SAO合并左旗标或与不同颜色分量相关联的合并标志。 联合上下文模型可以基于多个SAO语法元素的联合统计来导出。 本发明的实施例使用截断的一元二进制编码SAO类型索引，使用仅具有一个上下文的CABAC，或者使用具有与SAO类型索引相关联的第一bin的上下文模式的CABAC，以及对于任何剩余的bin来说具有旁路模式。