公开(公告)号：US20180139445A1

公开(公告)日：2018-05-17

申请号：US15572600

申请日：2016-05-19

Applicant: MEDIATEK INC.

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

IPC: H04N19/13 ,  H04N19/196 ,  H04N19/91

CPC classification number: H04N19/13 ,  H04N19/198 ,  H04N19/423 ,  H04N19/91

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：US20170302929A1

公开(公告)日：2017-10-19

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

CPC classification number: H04N19/117 ,  H04N19/107 ,  H04N19/126 ,  H04N19/139 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/80 ,  H04N19/82 ,  H04N19/86

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：US20170085913A1

公开(公告)日：2017-03-23

申请号：US15126365

申请日：2015-04-01

Applicant: MediaTek Inc.

Inventor： Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/523 ,  H04N19/105 ,  H04N19/96 ,  H04N19/117

CPC classification number: H04N19/523 ,  H04N19/105 ,  H04N19/117 ,  H04N19/167 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182 ,  H04N19/583 ,  H04N19/82 ,  H04N19/96

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.