公开(公告)号：US20200288145A1

公开(公告)日：2020-09-10

申请号：US16304207

申请日：2017-05-26

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Yu-Chen SUN ,  Shan LIU ,  Ching-Yeh CHEN ,  Yu-Wen HUANG ,  Xiaozhong XU ,  Wang-Lin LAI ,  Jing YE

IPC: H04N19/157 ,  H04N19/11 ,  H04N19/119 ,  H04N19/129 ,  H04N19/176 ,  H04N19/186

Abstract: Methods and apparatus for a coding system using palette mode coding for colour video are disclosed. According to method, when the palette mode is enabled, separate coding of luma and chroma components is disabled or if separate coding of luma and chroma components, the palette mode is disabled. According to another method, when the palette mode is enabled for the current image, palette mode coding is only applied to the luma blocks and non-palette mode coding is applied to the chroma blocks. According to yet another method, palette mode coding is applied to the luma blocks using luma palettes if the palette mode is selected for the luma blocks and palette mode coding applying to the chroma blocks using chroma palettes if the palette mode is selected for the chroma blocks. According to yet another method, the scan direction for a non-square CU depends on the shape of the non-square.

公开(公告)号：US20200252654A1

公开(公告)日：2020-08-06

申请号：US16646624

申请日：2018-09-28

Applicant: MEDIATEK INC.

Inventor： Yu-Chi SU ,  Jan KLOPP ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/86 ,  H04N19/186 ,  H04N19/176 ,  H04N19/33 ,  H04N19/107

Abstract: Method and apparatus of video encoding video coding for a video encoder or decoder using Neural Network (NN) are disclosed. According to one method, input data or a video bitstream are received for blocks in one or more pictures, which comprise one or more colour components. The residual data, prediction data, reconstructed data, filtered-reconstructed data or a combination thereof is derived for one or more blocks of said one or more pictures. A target signal corresponding to one or more of the about signal types is processed using a NN (Neural Network) and the input of the NN or an output of the NN comprises two or more colour components. According to another method, A target signal corresponding to one or more of the about signal types is processed using a NN and the input of the NN or an output of the NN comprises two or more colour components.

公开(公告)号：US20200228821A1

公开(公告)日：2020-07-16

申请号：US16827881

申请日：2020-03-24

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Han HUANG ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/513 ,  H04N19/423 ,  H04N19/52 ,  H04N19/537 ,  H04N19/119 ,  H04N19/176 ,  H04N19/58

Abstract: An embodiment of the method receives input data associated with a current block in a current picture at a video encoder or receiving a video bitstream corresponding to compressed data including the current block in the current picture at a video decoder, wherein the current block is coded or to be coded in an affine mode according to an affine motion model; calculates and storing affine parameters for a plurality of coded blocks in the current picture; retrieves the affine parameters of one or more coded blocks from the temporal buffer; derives an affine candidate including affine motion vectors using the retrieved affine parameters of the neighboring block; and encodes or decodes the current block by predicting the current block using one or more motion compensated blocks by the derived affine candidate.

公开(公告)号：US20200077111A1

公开(公告)日：2020-03-05

申请号：US16559966

申请日：2019-09-04

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Zhi-Yi LIN

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

Abstract: Method and apparatus for coding system using Inter coding tools are disclosed. According to one method, a same conversion process is applied to the MVs associated with a current block to generate the converted MVs at the video encoder side or at the video decoder side when the target Inter coding tool belongs to at least two tools of a group, wherein the group comprises at least one of inherited affine Merge candidate derivation and affine sub-block MV derivation. According to another method, a simplified conversion process is applied to the MV to generate a rounded MV, MV_rounded according to MV_rounded=(MV+offset−(MV>=0))>>shift.

公开(公告)号：US20190289315A1

公开(公告)日：2019-09-19

申请号：US16295320

申请日：2019-03-07

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Chih-Wei HSU ,  Chun-Chia CHEN

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/577 ,  H04N19/159 ,  H04N19/107 ,  H04N19/70

Abstract: Video processing methods and apparatuses for coding a current block by constructing a candidate set including an average candidate generated from two or more original motion candidates. At least one MV of the average candidate is derived by directly averaging MVs of the original motion candidates in one of list 0 and list 1 without scaling regardless whether the MVs are pointing to same or different reference pictures. A selected candidate is determined from the candidate set as a MVP for a current MV of the current block for encoding or decoding the current block.

公开(公告)号：US20190222859A1

公开(公告)日：2019-07-18

申请号：US16301772

申请日：2017-05-26

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Chen SUN ,  Yu-Wen HUANG ,  Shan LIU ,  Xiaozhong XU

IPC: H04N19/52 ,  H04N19/186 ,  H04N19/176 ,  H04N19/105 ,  H04N19/96 ,  H04N19/119

CPC classification number: H04N19/52 ,  H04N19/00 ,  H04N19/105 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/436 ,  H04N19/513 ,  H04N19/70 ,  H04N19/96

Abstract: A method and apparatus for a video coding system with the current picture referencing (CPR) mode enabled are disclosed. According to one method, the luma and chroma blocks of the current image are jointly coded using a same coding unit (CU) structure if the CPR mode is selected for the luma and the chroma blocks. Alternatively, if the luma and chroma components are partitioned into the luma and the chroma blocks separately using separate CU structures, the luma and chroma blocks are encoded or decoded using a coding mode selected from a coding mode group excluding the CPR mode. According to another method, the luma and chroma blocks of the current image are coded separately using a different CU structure if the CPR mode is selected for the luma and chroma blocks. In yet another method, reconstructed reference data is disclosed for the CPR mode with CU equal to PU.

公开(公告)号：US20190215521A1

公开(公告)日：2019-07-11

申请号：US16335435

申请日：2017-09-18

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Zhi-Yi LIN ,  Jing YE ,  Shan LIU

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/55 ,  H04N19/105 ,  H04N19/139

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/139 ,  H04N19/176 ,  H04N19/44 ,  H04N19/503 ,  H04N19/51 ,  H04N19/55 ,  H04N19/593

Abstract: Methods and apparatus using decoder-side Intra mode derivation (DIMD) are disclosed. According to one method, two-mode DIMD is used, where two DIMD modes are developed. The DIMD predictors for the two DIMD modes are derived. A final DIMD predictor is derived by blending the two DIMD predictors. In a second method, the DIMD mode is combined with a normal Intra mode to derive a combined DIMND-Intra predictor. In a third method, the DIMD mode is combined with an Inter mode to derive a combined DIMD-Inter predictor. Various blending methods to combine the DIMD mode and another mode are also disclosed.

公开(公告)号：US20190082192A1

公开(公告)日：2019-03-14

申请号：US16083645

申请日：2017-03-14

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/56 ,  H04N19/577

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, merge index for merge candidate group comprising bilateral matching merge candidate and/or template matching merge candidate are signalled using different codewords. According to another method, the first-stage MV or the first-stage MV pair is used as an only initial MV or MV pair or used as a central MV of search window for second-stage search. According to yet another method, after the reference template for a first reference list is found, the current template is modified for template search in the other reference list. According to yet another method, the sub-PU search is disabled for the template search. According to yet another method, block difference calculation is based on reduced bit depth during MV search associated with the decoder-side MV derivation process.

公开(公告)号：US20180278945A1

公开(公告)日：2018-09-27

申请号：US15764346

申请日：2016-09-30

Applicant: MEDIATEK INC.

Inventor： Shih-Ta HSIANG ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/186 ,  H04N19/182 ,  H04N19/70

CPC classification number: H04N19/186 ,  G06T9/00 ,  H04N19/176 ,  H04N19/182 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91

Abstract: A method and apparatus for video coding using coding modes including a palette mode are disclosed. In one embodiment, the total number of palette indices in the current block is coded into a binary string using a TR (Truncated Rice) binarization process with the Rice parameter to generate a prefix part and using an EGk (k-th order Exp-Golomb) binary process to generate a suffix part for the binary string, or using the EGk binarization process with the Rice parameter (k). The suffix part is allowed to be empty. In another embodiment, a Rice parameter is determined. If the Rice parameter is equal to or greater than log-base-2 of current block size, the variable related to a total number of palette indices in the current block of video data is binarized into a binary string using a fixed-length code with bit length equal to log-base-2 of current block size.

公开(公告)号：US20180199057A1

公开(公告)日：2018-07-12

申请号：US15868995

申请日：2018-01-11

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Chih-Wei HSU ,  Ching-Yeh CHEN

IPC: H04N19/533 ,  H04N19/577 ,  H04N19/573

CPC classification number: H04N19/533 ,  H04N19/523 ,  H04N19/55 ,  H04N19/56 ,  H04N19/573 ,  H04N19/577

Abstract: Method and apparatus of using motion refinement with reduced bandwidth are disclosed. According to one method, a predictor refinement process is applied to generate motion refinement for the current block by searching among multiple motion vector candidates using reference data comprising the target motion-compensated reference block, where if a target motion vector candidate requires target reference data from the target motion-compensated reference block being outside the valid reference block, the target motion vector candidate is excluded from said searching the multiple motion vector candidates or a replacement motion vector candidate closer to a center of the corresponding block of the current block is used as a replacement for the target motion vector candidate. In another method, if a target motion vector candidate belongs to one or more target fractional-pixel locations, a reduced tap-length interpolation filter is applied to the target motion vector candidate.