公开(公告)号：US20200068206A1

公开(公告)日：2020-02-27

申请号：US16548340

申请日：2019-08-22

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N19/18 ,  H04N19/13 ,  H04N19/70 ,  H04N19/146

Abstract: A video coder that constrains the total number of regular bins used for entropy coding syntax elements of a current block is provided. The video coder entropy encodes or decodes the syntax elements selectively as either regular bins using context modeling or as bypass bins without context modeling. A constraint is specified to limit a total number of regular bins used for entropy coding the syntax elements of the current block. There may be no constraint limiting a number of regular bins specific to an individual syntax element of the current block.

公开(公告)号：US10567806B2

公开(公告)日：2020-02-18

申请号：US15034115

申请日：2014-11-10

Applicant: MediaTek Inc.

Inventor： Chia-Yang Tsai ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/82 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/196 ,  H04N19/117 ,  H04N19/14 ,  H04N19/172 ,  H04N19/182 ,  H04N19/18 ,  H04N19/68

Abstract: A method of adaptive loop filtering for reconstructed video to improve the performance is disclosed. In one embodiment, a loop filter is selected from one or more candidate filters including a circular symmetrical filter candidate. The candidate filters also may include a ½-symmetry filter candidate and a flag is used to select between different symmetries. In another embodiment, a priority-based block filter merge is disclosed. A filter merge list consisting of no more than a first number of filter candidates selected from corresponding filters used by corresponding set members in the neighboring block set is generated according to a priority order of the set members in the neighboring block set. In yet another embodiment, the loop filter is shared by reconstructed video in multiple image units of a same group. The filter merge groups are identified by differences of consecutive group indices.

公开(公告)号：US10511835B2

公开(公告)日：2019-12-17

申请号：US15754721

申请日：2016-09-02

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Jian-Liang Lin ,  Yu-Chen Sun ,  Yu-Ting Shen

IPC: H04N19/105 ,  H04N19/52 ,  H04N19/176 ,  H04N19/567 ,  H04N19/57

Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, an initial motion vector (MV) index is signalled in a video bitstream at an encoder side or determined from the video bitstream at a decoder side. A selected MV is then derived using bilateral matching, template matching or both to refine an initial MV associated with the initial MV index. In another method, when both MVs for list 0 and list 1 exist in template matching, the smallest-cost MV between the two MVs may be used for uni-prediction template matching if the cost is lower than the bi-prediction template matching. According to yet another method, the refinement of the MV search is dependent on the block size. According to yet another method, merge candidate MV pair is always used for bilateral matching or template matching.

公开(公告)号：US20190261008A1

公开(公告)日：2019-08-22

申请号：US16403953

申请日：2019-05-06

Applicant: MediaTek Inc.

Inventor： Chih-Ming Fu ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/182 ,  H04N19/86 ,  H04N19/82 ,  H04N19/14 ,  H04N19/61 ,  H04N19/46 ,  H04N5/21 ,  H04N5/217 ,  H04N19/91 ,  H04N19/186 ,  H04N19/44 ,  H04N19/625 ,  H04N19/70

Abstract: A system and method of content adaptive pixel intensity processing are described. The method includes receiving a predefined set of processed video data configured from the processed video data, deriving a range information associated with an original maximum value and an original minimum value for a predefined set of original video data, wherein the predefined set of processed video data is derived from the predefined set of original video data, and adaptively clipping pixel intensity of the predefined set of processed video data to a range deriving from the range information, wherein the range information is incorporated in a bitstream and represented in a form of the original maximum value and the original minimum value, prediction values associated with a reference maximum value and a reference minimum value, or a range index associated with a predefined range set.

公开(公告)号：US10390028B2

公开(公告)日：2019-08-20

申请号：US15578221

申请日：2016-06-03

Applicant: MEDIATEK INC.

Inventor： Yu-Chen Sun ,  Tzu-Der Chuang ,  Han-Liang Chou ,  Chia-Yun Cheng ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/00 ,  H04N19/186 ,  H04N19/51 ,  H04N19/593 ,  H04N19/423 ,  H04N19/433 ,  H04N19/176 ,  H04N19/70

Abstract: Methods of palette coding to reduce the required coding process are disclosed. According to one method, smaller blocks are derived from a large block. The histogram of the large block is derived based on the histograms of smaller blocks in the large block. According to another method, one or more palette tables are derived based on multiple blocks. One palette table is used for each of the multiple blocks. According to yet another method, index map transpose is performed in the parsing stage according to the transpose flag of the index map. Accordingly, a buffer to store the transpose flags can be saved. According to still yet another method, the palette predictor update is performed using an index mapping table to avoid the need for shuffling the contents of the palette predictor stored in a palette buffer.

公开(公告)号：US20180205960A1

公开(公告)日：2018-07-19

申请号：US15919008

申请日：2018-03-12

Applicant: MediaTek Inc.

Inventor： Tzu-Der Chuang ,  Zhenzhong Chen ,  Shan Liu ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/30 ,  H04N19/61 ,  H04N19/52 ,  H04N19/50 ,  H04N19/105 ,  H04N19/176 ,  H04N19/134 ,  H04N19/12 ,  H04N19/187

CPC classification number: H04N19/30 ,  H04N19/105 ,  H04N19/12 ,  H04N19/134 ,  H04N19/176 ,  H04N19/187 ,  H04N19/50 ,  H04N19/52 ,  H04N19/61

Abstract: Methods of adaptive transform type based on transform unit (TU) size for enhancement layer (EL) coding and multiple motion candidates for EL coding based on corresponding base layer (BL) video data are provided. One method selects a transform type from multiple allowable transform types based on the TU size and applies the selected transform type to the transform units of the inter-layer prediction processed data. Another method derives multiple motion candidates for the EL video data coded in Merge mode or Inter mode based on motion information associated with the corresponding BL video data.

公开(公告)号：US09237349B2

公开(公告)日：2016-01-12

申请号：US14623599

申请日：2015-02-17

Applicant: MEDIATEK INC.

Inventor： Chia-Yang Tsai ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Ching-Yeh Chen ,  Chih-Ming Fu ,  Shaw-Min Lei

IPC: H04N7/32 ,  H04N19/82 ,  H04N19/117 ,  H04N19/70 ,  H04N19/172 ,  H04N19/174 ,  H04N19/86 ,  H04N19/136

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/172 ,  H04N19/174 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

Abstract: A method and apparatus for sharing information in a video decoding system are disclosed. The method derives reconstructed data for a picture from a bitstream, where the picture is partitioned into multiple slices. An information-sharing flag is parsed from the bitstream associated with a current reconstructed slice. If the information-sharing flag indicates information sharing, shared information is determined from a part of the bitstream not corresponding to the current reconstructed slice, and in-loop filtering process is applied to the current reconstructed slice according to the shared information. If the information-sharing flag indicates filter no information sharing, individual information is determined from a part of the bitstream corresponding to the current reconstructed slice, and in-loop filtering process is applied to the current reconstructed slice according to the individual information. A method for a corresponding encoder is also disclosed.

Abstract translation: 公开了一种用于在视频解码系统中共享信息的方法和装置。 该方法从比特流中导出图像的重构数据，其中图像被分割成多个切片。 从与当前重建切片相关联的比特流中解析信息共享标志。 如果信息共享标志指示信息共享，则从不与当前重构片相对应的比特流的一部分确定共享信息，并且根据共享信息将当前重构切片应用到环路滤波处理。 如果信息共享标志指示无过滤器信息共享，则从与当前重构切片相对应的比特流的一部分确定个体信息，并且根据个体信息将当前重建的切片应用于环路内过滤处理。 还公开了一种对应的编码器的方法。

公开(公告)号：US20150281708A1

公开(公告)日：2015-10-01

申请号：US14378965

申请日：2013-03-19

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Jian-Liang Lin ,  Yi-Wen Chen ,  Shih-Ta Hsiang ,  Shan Liu ,  Shaw-Min Lei

IPC: H04N19/33 ,  H04N19/577 ,  H04N19/52

CPC classification number: H04N19/33 ,  H04N19/52 ,  H04N19/577 ,  H04N19/96

Abstract: A method and apparatus for coding video data using Inter prediction mode or Merge mode in a video coding system are disclosed, where the video data is configured into a Base Layer (BL) and an Enhancement Layer (EL), and the EL has higher spatial resolution or better video quality than the BL. In one embodiment, at least one information piece of motion information associated with one or more BL blocks in the BL is identified. A motion vector prediction (MVP) candidate list or a Merge candidate list for the selected block in the EL is then determined, where said at least one information piece associated with said one or more BL blocks in the BL is included in the MVP-candidate list or a Merge candidate MVP candidate list or the Merge candidate list. The input data associated with the selected block is coded or decoded using the MVP candidate list or the Merge candidate list.

Abstract translation: 公开了一种在视频编码系统中使用帧间预测模式或合并模式对视频数据进行编码的方法和装置，其中将视频数据配置为基本层（BL）和增强层（EL），并且EL具有较高的空间 分辨率或更好的视频质量比BL。 在一个实施例中，识别与BL中的一个或多个BL块相关联的运动信息的至少一个信息片段。 然后确定EL中所选块的运动矢量预测（MVP）候选列表或合并候选列表，其中与BL中的所述一个或多个BL块相关联的所述至少一个信息片段被包括在MVP候选中 列表或合并候选MVP候选列表或合并候选列表。 与所选择的块相关联的输入数据使用MVP候选列表或合并候选列表进行编码或解码。

公开(公告)号：US20150222912A1

公开(公告)日：2015-08-06

申请号：US14422051

申请日：2013-07-30

Applicant: MediaTek Inc.

Inventor： Tzu-Der Chuang ,  Zhenzhong Chen ,  Shan Liu ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/187 ,  H04N19/70 ,  H04N19/50 ,  H04N19/176 ,  H04N19/31

CPC classification number: H04N19/187 ,  H04N19/176 ,  H04N19/31 ,  H04N19/33 ,  H04N19/36 ,  H04N19/463 ,  H04N19/50 ,  H04N19/70

Abstract: A method and apparatus for coding video data in a scalable or three-dimensional video coding system are disclosed. In one embodiment, context for the input data associated with an inter-layer or inter-view coding syntax element of a current block in an enhancement-layer (EL) or a dependent view is formed or the input data is parsed to identify the context based on information associated with one or more neighboring blocks, information associated with the current block, or both. In another embodiment, encoding or decoding is applied to the input data associated with the current block in the EL using inter-layer texture prediction based on the BL block in the BL, wherein a flag indicating whether there is any transform coefficient coded for the current block is signaled.

Abstract translation: 公开了一种用于对可缩放或三维视频编码系统中的视频数据进行编码的方法和装置。 在一个实施例中，形成与增强层（EL）或从属视图中的当前块的层间或视图间编码语法元素相关联的输入数据的上下文，或者解析输入数据以识别上下文 基于与一个或多个相邻块相关联的信息，与当前块相关联的信息，或两者。 在另一个实施例中，使用基于BL中的BL块的层间纹理预测将编码或解码应用于与EL中的当前块相关联的输入数据，其中指示是否存在针对当前的编码的任何变换系数的标志 信号通知。

公开(公告)号：US20150163488A1

公开(公告)日：2015-06-11

申请号：US14623599

申请日：2015-02-17

Applicant: MEDIATEK INC.

Inventor： Chia-Yang Tsai ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Ching-Yeh Chen ,  Chih-Ming Fu ,  Shaw-Min Lei

IPC: H04N19/117 ,  H04N19/174 ,  H04N19/136 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/172 ,  H04N19/174 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

Abstract: A method and apparatus for sharing information in a video decoding system are disclosed. The method derives reconstructed data for a picture from a bitstream, where the picture is partitioned into multiple slices. An information-sharing flag is parsed from the bitstream associated with a current reconstructed slice. If the information-sharing flag indicates information sharing, shared information is determined from a part of the bitstream not corresponding to the current reconstructed slice, and in-loop filtering process is applied to the current reconstructed slice according to the shared information. If the information-sharing flag indicates filter no information sharing, individual information is determined from a part of the bitstream corresponding to the current reconstructed slice, and in-loop filtering process is applied to the current reconstructed slice according to the individual information. A method for a corresponding encoder is also disclosed.

Abstract translation: 公开了一种用于在视频解码系统中共享信息的方法和装置。 该方法从比特流中导出图像的重构数据，其中图像被分割成多个切片。 从与当前重建切片相关联的比特流中解析信息共享标志。 如果信息共享标志指示信息共享，则从不与当前重构片相对应的比特流的一部分确定共享信息，并且根据共享信息将当前重构切片应用到环路滤波处理。 如果信息共享标志指示无过滤器信息共享，则从与当前重构切片相对应的比特流的一部分确定个体信息，并且根据个体信息将当前重建的切片应用于环路内过滤处理。 还公开了一种对应的编码器的方法。