公开(公告)号：US10484703B2

公开(公告)日：2019-11-19

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 ,  H04N19/96 ,  H04N19/139 ,  H04N19/176 ,  H04N19/107

Abstract: A method for video coding includes receiving a prediction block (PB) of a picture, and determining a number of merge candidate positions of the PB according to a size of the PB. The merge candidate positions on sides of the PB can be determined according to the number of the merge candidate positions. A candidate list can be constructed that includes motion data of a subset of the merge candidate positions. In some examples, a number of the merge candidate positions on one side of the PB is determined according to a side length of the respective side, or a width-height ratio of the PB. In some examples, the merge candidate positions on one side of the PB overlap or are adjacent to points that equally divide the respective side.

公开(公告)号：US10484678B2

公开(公告)日：2019-11-19

申请号：US15795582

申请日：2017-10-27

Applicant: MEDIATEK INC

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

IPC: H04N19/105 ,  H04N19/597 ,  H04N19/70 ,  H04N19/30 ,  H04N19/593 ,  H04N19/136 ,  H04N19/186

Abstract: A method of inter-layer or inter-view prediction for an inter-layer or inter-view video coding system is disclosed. The method includes receiving a to-be-processed block in the EL or the EV, determining a collocated block in the BL (Base layer) or the BV (Base View), wherein the collocated block is located at a location in the BL or the BV corresponding to the to-be-processed block in the EL (Enhancement Layer) or in the EV (Enhancement view), deriving a predictor for the to-be-processed block in the EL or the EV from the collocated block in the BL or the BV based on pixel data of the BL or the BV, wherein the predictor corresponds to a linear function of pixel data in the collocated block, and encoding or decoding the to-be-processed block in the EL or the EV using the predictor.

公开(公告)号：US10462459B2

公开(公告)日：2019-10-29

申请号：US15485694

申请日：2017-04-12

Applicant: MEDIATEK INC.

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

IPC: H04N19/117 ,  H04N19/80 ,  H04N19/176 ,  H04N19/107 ,  H04N19/139 ,  H04N19/126 ,  H04N19/86 ,  H04N19/186 ,  H04N19/157 ,  H04N19/82

Abstract: Aspects of the disclosure provide a method for denoising a reconstructed picture. The method can include receiving reconstructed video data corresponding to a picture, dividing the picture into current patches, forming patch groups each including a current patch and a number of reference patches that are similar to the current patch, denoising the patch groups to modify pixel values of the patch groups to create a filtered picture, and generating a reference picture based on the filtered picture for encoding or decoding a picture. The operation of denoising the patch groups includes deriving a variance of compression noise in the respective patch group based on a compression noise model. A selection of model parameters is determined based on coding unit level information.

公开(公告)号：US10356438B2

公开(公告)日：2019-07-16

申请号：US15578191

申请日：2016-06-03

Applicant: MEDIATEK INC.

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

IPC: H04N19/593 ,  H04N19/563 ,  H04N19/513 ,  H04N19/70

Abstract: In order to overcome the issue caused by a decoded block vector (BV) pointing to a reference block overlapping with an unavailable area, various methods are disclosed. According to one method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by padding from neighboring available pixels. The padding can be done in the horizontal direction and then the vertical direction. The padding may also done in the vertical direction first and then horizontal direction. In another method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by using previous decoded pixels in the unavailable area. A pre-defined value may also be used for the unavailable area.

公开(公告)号：US10291921B2

公开(公告)日：2019-05-14

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

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：US10194170B2

公开(公告)日：2019-01-29

申请号：US15354435

申请日：2016-11-17

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Yu-Wen Huang

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/59 ,  H04N19/80 ,  H04N19/593 ,  H04N19/159 ,  H04N19/46 ,  H04N19/635 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182

Abstract: Aspects of the disclosure provide a method for video coding. The method includes receiving input data associated with a processing block in a current picture, selecting, from a set of neighboring reconstructed samples for intra-coding pixels in the processing block, a plurality of reference samples for a pixel in the processing block based on a position of the pixel and an intra prediction mode of the processing block, determining a projection phase for the pixel based on the position of the pixel and the intra prediction mode of the processing block, determining coefficients of an interpolation filter based on the projection phase for the pixel, applying the interpolation filter with the determined coefficients on the reference samples to generate a prediction of the pixel, and encoding or decoding the pixel in the processing block using the prediction of the pixel.

公开(公告)号：US10154268B2

公开(公告)日：2018-12-11

申请号：US15632481

申请日：2017-06-26

Applicant: MEDIATEK INC.

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

IPC: H04N19/11 ,  H04N19/00 ,  H04N19/59 ,  H04N19/593 ,  H04N19/186 ,  H04N19/182 ,  H04N19/597 ,  H04N19/159 ,  H04N19/82

Abstract: In one implementation, a method operates by receiving neighboring reconstructed first-color pixels and current reconstructed first-color pixels of a current first-color block and receiving neighboring reconstructed second-color pixels of a current second-color block collocated with the current first-color block. The method then determines linear model (LM) parameters according to a linear model for one or more LM Intra modes. The method then receives input data associated with current second-color pixels of the current second-color block and generates a cross-color Intra predictor from the current reconstructed first-color pixels of the current first-color block using the LM parameters associated with a LM Intra mode selected from said one or more LM Intra modes. Finally, the method applies cross-color Intra prediction encoding or decoding to the current second-color pixels of the current second-color block using the cross-color Intra predictor for the selected LM Intra mode.

公开(公告)号：US10123048B2

公开(公告)日：2018-11-06

申请号：US15034125

申请日：2014-11-13

Applicant: MediaTek Inc.

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

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

Abstract: A method of adaptive loop filtering with implicit sample-based On/Off control for reconstructed video to improve the performance is disclosed. In one embodiment, each pixel of the video data associated with the reconstructed current image unit is classified into a first group and a second group. Adaptive Loop Filter (ALF) is then applied to these pixels belonging to the first group. For pixels in the second group, ALF is not applied. The image unit may correspond to one coding tree block (CTB) or one coding tree unit (CTU). Various classification means for classifying each pixel into a first group or a second group have also been disclosed. The adaptive loop filtering with implicit sample-based On/Off control may also be used as an additional mode in a system supporting block-based On/Off control.

公开(公告)号：US20180288430A1

公开(公告)日：2018-10-04

申请号：US15940248

申请日：2018-03-29

Applicant: MEDIATEK INC.

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

IPC: H04N19/51 ,  H04N19/176 ,  G06F17/30

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：US09843820B2

公开(公告)日：2017-12-12

申请号：US14412203

申请日：2013-07-05

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Yi-Wen Chen ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC: H04N19/597 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/597 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

Abstract: A method and apparatus for three-dimensional video coding or multi-view video coding are disclosed. Embodiments according to the present invention derive a unified disparity vector from depth information for Inter mode and Skip/Direct mode. The unified disparity vector is derived from a subset of depth samples in an associated depth block corresponding to the current block using a unified derivation method. The unified derivation method is applied in Inter mode, Skip mode, or Direct mode when a disparity vector derived from depth data is required for encoding or decoding. The unified disparity vector can also be applied to derive a disparity vector for locating a corresponding block, and thus an inter-view motion vector candidate can be determined for Skip mode or Direct mode.