公开(公告)号：US20180014034A1

公开(公告)日：2018-01-11

申请号：US15542739

申请日：2016-02-05

Applicant: MEDIATEK INC.

Inventor： Wang-Lin LAI ,  Jungsun KIM ,  Tzu-Der CHUANG ,  Jing YE ,  Shan LIU

IPC: H04N19/86 ,  H04N19/176 ,  H04N19/44 ,  H04N19/186 ,  H04N19/70 ,  H04N19/593

CPC classification number: H04N19/86 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/593 ,  H04N19/70

Abstract: Methods and apparatus for image or video decoding in a video decoding system are disclosed. Input data associated with a current block coded with palette mode is received to parse a palette predictor run. A position of reused colors in a palette predictor table is computed according to the palette predictor run. A size of the palette predictor table is determined and compared with the position computed according to the palette predictor run to obtain a comparison result. The decoder applies palette decoding to the current block according to the comparison result. If the comparison result indicates the position computed according to the palette predictor run is not within the palette predictor table, the position is changed to a new position to indicate a corresponding reused color for the current block or a decoding process of palette predictor reuse flags is terminated.

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.