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：US10397588B2

公开(公告)日：2019-08-27

申请号：US15578184

申请日：2016-06-03

Applicant: MEDIATEK INC.

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

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

Abstract: A method and apparatus of sharing an on-chip buffer or cache memory for a video coding system using coding modes including Inter prediction mode or Intra Block Copy (IntraBC) mode are disclosed. At least partial pre-deblocking reconstructed video data of a current picture is stored in an on-chip buffer or cache memory. If the current block is coded using IntraBC mode, the pre-deblocking reconstructed video data of the current picture stored in the on-chip buffer or cache memory are used to derive IntraBC prediction for the current block. In some embodiments, if the current block is coded using Inter prediction mode, Inter reference video data from the previous picture stored in the on-chip buffer or cache memory are used to derive Inter prediction for the current block. In another embodiment, the motion compensation/motion estimation unit is shared by the two modes.

公开(公告)号：US10321151B2

公开(公告)日：2019-06-11

申请号：US15126365

申请日：2015-04-01

Applicant: MediaTek Inc.

Inventor： Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/583 ,  H04N19/523 ,  H04N19/105 ,  H04N19/117 ,  H04N19/96 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182

Abstract: A method and apparatus of adaptive interpolation filter for motion compensation with fractional-pixel accuracy are disclosed. Embodiments of the present invention generate interpolated reference samples at non-integer locations based on existing reference samples in a reference block by using an interpolation filter set adaptively according to pixel location and/or pixel characteristics. A current block is then encoded or decoded using a temporal predictor including the interpolated reference samples. The adaptive interpolation filter can be applied to the prediction unit (PU). In one embodiment, the interpolation filter set consists of interpolation filters having different filter lengths. An interpolation filter with a longer tap length is applied to generate interpolated reference samples farther from the block boundary and an interpolation filter with a shorter tap length is applied to generate interpolated reference samples closer to the block boundary.

公开(公告)号：US10225555B2

公开(公告)日：2019-03-05

申请号：US15572600

申请日：2016-05-19

Applicant: MEDIATEK INC.

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

IPC: H03M7/42 ,  H04N19/13 ,  H04N19/91 ,  H04N19/196 ,  H04N19/423

Abstract: A method and apparatus of entropy coding for a video encoder or decoder using multiple-table based Context-Based Adaptive Binary Arithmetic Coder (CABAC) are disclosed. In one embodiment, a current bin of a binary data of a current coding symbol is encoded or decoded according to a probability of a binary value of the current bin and the probability of the binary value is updated according to the binary value of the current bin for a next bin by using multiple-parameter probability models. Each multiple-parameter probability model is updated using at least one lookup table with the individual set of probability state as a table index to access contents of said at least one lookup table. In another embodiment, the range update is calculated for a range interval based on middle value of the range interval.

公开(公告)号：US20170155911A1

公开(公告)日：2017-06-01

申请号：US15355484

申请日：2016-11-18

Applicant: MEDIATEK, INC.

Inventor： Jian-Liang LIN ,  Yu-Wen Huang

IPC: H04N19/159 ,  H04N19/46 ,  H04N19/117

CPC classification number: H04N19/159 ,  H04N19/11 ,  H04N19/117 ,  H04N19/147 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/82

Abstract: Aspects of the disclosure include a method for video coding. The method includes receiving input data associated with a current block in a current image frame of video data, where the current block is coded by intra-prediction or to be coded by intra-prediction. The method also includes determining an intra-prediction mode of the current block, selecting one of a plurality of filters including at least a default filter and an N-tap filter, and generating filtered neighboring samples by filtering neighboring samples adjacent to the current block using the selected filter, where N is a positive integer different from 3. Moreover, the method includes encoding or decoding the current block by predicting the current block based on the filtered neighboring samples and the intra-prediction mode.

公开(公告)号：US09525879B2

公开(公告)日：2016-12-20

申请号：US15047943

申请日：2016-02-19

Applicant: MediaTek Inc.

Inventor： Jian-Liang Lin ,  Yi-Wen Chen ,  Yu-Wen Huang ,  Chih-Ming Fu ,  Chi-Ling Wu ,  Yu-Pao Tsai ,  Ching-Yeh Chen ,  Shaw-Min Lei

IPC: H04N11/02 ,  H04N19/109 ,  H04N19/52 ,  H04N19/65 ,  H04N19/895 ,  H04N19/119 ,  H04N19/139 ,  H04N19/147 ,  H04N19/174 ,  H04N19/177 ,  H04N19/184 ,  H04N19/567 ,  H04N19/593 ,  H04N19/615 ,  H04N19/70

CPC classification number: H04N19/109 ,  H04N19/119 ,  H04N19/139 ,  H04N19/147 ,  H04N19/174 ,  H04N19/177 ,  H04N19/184 ,  H04N19/52 ,  H04N19/567 ,  H04N19/593 ,  H04N19/615 ,  H04N19/65 ,  H04N19/70 ,  H04N19/895

Abstract: A method and apparatus for deriving a motion vector predictor (MVP) are disclosed. The MVP is selected from spatial MVP and temporalone or more MVP candidates. The method determines a value of a flag in a video bitstream, where the flag is utilized for selectively disabling use of one or more temporal MVP candidates for motion vector prediction. The method selects, based on an index derived from the video bitstream, the MVP from one or more non-temporal MVP candidates responsive to the flag indicating that said one or more temporal MVP candidates are not to be utilized for motion vector prediction. Further, the method provides the MVP for the current block.

Abstract translation: 公开了一种用于导出运动矢量预测器（MVP）的方法和装置。 MVP是从空间MVP和temporalㄧ或更多MVP候选中选出的。 该方法确定视频比特流中的标志的值，其中该标志用于选择性地禁用一个或多个用于运动矢量预测的时间MVP候选的使用。 该方法基于从视频比特流导出的索引，根据指示所述一个或多个时间MVP候选不用于运动矢量预测的标志从一个或多个非时间MVP候选中选择MVP。 此外，该方法为当前块提供MVP。

公开(公告)号：US20160360211A1

公开(公告)日：2016-12-08

申请号：US15238415

申请日：2016-08-16

Applicant: MediaTek Inc.

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

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

CPC classification number: H04N19/182 ,  H04N5/21 ,  H04N5/2173 ,  H04N19/14 ,  H04N19/186 ,  H04N19/44 ,  H04N19/46 ,  H04N19/61 ,  H04N19/625 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86 ,  H04N19/91

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.

Abstract translation: 描述了内容自适应像素强度处理的系统和方法。 该方法包括从经处理的视频数据中接收预定义的经处理的视频数据集，导出与原始最大值相关联的范围信息和原始视频数据的预定义集合的原始最小值，其中预定义的一组经处理的视频数据 源自预定义的原始视频数据集合，并且将预定义的经处理视频数据集合的像素强度自适应地剪切到从范围信息导出的范围，其中范围信息被并入比特流并以原始形式表示 最大值和原始最小值，与参考最大值和参考最小值相关联的预测值，或与预定义范围集合相关联的范围索引。

公开(公告)号：US20160150096A1

公开(公告)日：2016-05-26

申请号：US14899126

申请日：2015-05-19

Applicant: MEDIATEK INC.

Inventor： Chia-Ping Chen ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC: H04M19/04

CPC classification number: H04M19/042 ,  G06F9/4451 ,  H04M19/045 ,  H04W8/183

Abstract: A method for changing a setting of a mobile communication device is disclosed. The method includes receiving context information of the mobile communication device, changing the setting of the mobile communication device according to the context information and a user preference rule, and updating the user preference rule according to the context information and the changed setting.

Abstract translation: 公开了一种用于改变移动通信设备的设置的方法。 该方法包括接收移动通信设备的上下文信息，根据上下文信息和用户偏好规则改变移动通信设备的设置，并根据上下文信息和改变的设置更新用户偏好规则。

公开(公告)号：US20160142706A1

公开(公告)日：2016-05-19

申请号：US15007509

申请日：2016-01-27

Applicant: MediaTek Inc.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shan Liu ,  Zhi Zhou ,  Shaw-Min Lei

IPC: H04N19/11 ,  H04N19/169 ,  H04N19/176 ,  H04N19/44 ,  H04N19/136

Abstract: A method for chroma intra prediction mode decoding includes decoding a chroma intra prediction mode for a current chroma block according to a codeword set corresponding to a chroma intra prediction mode set, wherein the codeword set comprises at least one codeword with a first length type and at least one codeword with a second length type. If a codeword is one of said at least one codeword with the first length type, the chroma intra prediction mode is decoded as a Luma-based chroma prediction Mode (LM) or a Direct Mode (DM). The method also includes determines the chroma intra prediction mode based on an intra prediction mode of a current luma block if the chroma intra prediction mode is the DM.

Abstract translation: 色度帧内预测模式解码方法包括根据对应于色度帧内预测模式集合的码字集解码当前色度块的色度帧内预测模式，其中码字组包括至少一个第一长度类型的码字， 具有第二长度类型的至少一个码字。 如果码字是具有第一长度类型的所述至少一个码字之一，则色度帧内预测模式被解码为基于亮度的色度预测模式（LM）或直接模式（DM）。 该方法还包括如果色度帧内预测模式是DM，则基于当前亮度块的帧内预测模式来确定色度帧内预测模式。