公开(公告)号：US20210297691A1

公开(公告)日：2021-09-23

申请号：US17253306

申请日：2019-06-20

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/543 ,  H04N19/423 ,  H04N19/96

Abstract: Methods and apparatus of Inter prediction using coding modes including an affine mode are disclosed. According to one method, if the target neighbouring block is in a neighbouring region of the current block, an affine control-point MV candidate is derived based on two target MVs (motion vectors) of the target neighbouring block where the affine control-point MV candidate is based on a 4-parameter affine model and the target neighbouring block is coded in a 6-parameter affine mode. According to another method, if the target neighbouring block is in a neighbouring region of the current block, an affine control-point MV candidate is derived based on two sub-block MVs (motion vectors) of the target neighbouring block, if the target neighbouring block is in a same region as the current block, the affine control-point MV candidate is derived based on control-point MVs of the target neighbouring block.

公开(公告)号：US20210266595A1

公开(公告)日：2021-08-26

申请号：US17265976

申请日：2019-08-16

Applicant: MEDIATEK INC.

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

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/105 ,  H04N19/70 ,  H04N19/52

Abstract: Exemplary video processing methods and apparatuses for encoding or decoding a current block by bi-directional prediction. Multiple weight sets are utilized for blending List 0 and List 1 predictors, and the selection among multiple weight sets may be implicitly determined based on video information. Each weight set is composed of multiple candidate weights, and one candidate weight is selected for the current block. A weight pair associated with the selected weight for the current block is used for weighted averaging List 0 and List 1 predictors of the current block to generate a final inter predictor. The video processing methods and apparatuses encode or decode the current block according to the final inter predictor of the current block.

公开(公告)号：US20210235079A1

公开(公告)日：2021-07-29

申请号：US17051276

申请日：2019-04-30

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Kung-Nien YANG ,  Chun-Chia CHEN

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176

Abstract: A methods and apparatus for block partition in video encoding and decoding are disclosed. According to one method, a current data unit is partitioned into initial blocks using inferred splitting without split-syntax signalling. The initial blocks comprises multiple initial luma blocks and multiple initial chroma blocks, and size of the initial luma block is M×N, M and N are positive integers and the current data unit is larger than M×N for the luma component. A partition structure is determined for partitioning each initial luma block and each initial chroma block into one or more luma CUs (coding units) and one or more chroma CUs respectively. The luma syntaxes and the chroma syntaxes associated with one initial block in the current data unit are signalled or parsed, and then the luma syntaxes and the chroma syntaxes associated with one next initial block in the current data unit are signalled or parsed.

公开(公告)号：US20210185332A1

公开(公告)日：2021-06-17

申请号：US17117724

申请日：2020-12-10

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Chih-Wei HSU ,  Ching-Yeh CHEN ,  Chia-Ming TSAI ,  Chun-Chia CHEN ,  Olena CHUBACH ,  Yu-Wen HUANG

IPC: H04N19/33 ,  H04N19/184 ,  H04N19/172 ,  H04N19/132

Abstract: Method and apparatus of coding a video sequence, are disclosed. According to the method, a bitstream corresponding to encoded data of the video sequence is generated at an encoder side or received at a decoder side, where the bitstream complies with a bitstream conformance that one or more constraints are satisfied. The constraints are related to a set of RPR (Reference Picture Resampling) parameters including scaling window width or height of a current picture, scaling window width or height of a reference picture, current picture width or height, and maximum picture width or height specified for the video sequence. Scaling information for the RPR mode is derived using the set of RPR parameters. A target picture of the video sequence is then encoded at the encoder side or decoded at the decoder side by utilizing the scaling information when the RPR mode is enabled for the target picture.

公开(公告)号：US20210168405A1

公开(公告)日：2021-06-03

申请号：US17047244

申请日：2019-04-16

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Yu-Chi SU ,  Jan KLOPP ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/70 ,  H04N19/82 ,  G06N3/04

Abstract: A method and apparatus of video encoding video coding for a video encoder or decoder using Neural Network (NN) are disclosed. According to this method, the multiple frames in a video sequence comprises multiple segments, where each of the multiple segments comprises a set of frames. The NN (Neural Network) processing is applied to a target signal in one or more encoded frames of a target segment in the encoder side or to the target signal in one or more decoded frames of the target segment in the decoder side using one NN parameter set for the target segment. The target signal may correspond to reconstructed residual, reconstructed output, de-blocked output, SAO (sample adaptive offset) output, ALF (adaptive loop filter) output, or a combination thereof. In another embodiment, the NN processing is applied to a target signal only in one or more specific encoded or decoded frames.

公开(公告)号：US20210136420A1

公开(公告)日：2021-05-06

申请号：US17087671

申请日：2020-11-03

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Shih-Ta HSIANG ,  Olena CHUBACH ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Lulin CHEN

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/172

Abstract: Methods and apparatus for video coding are disclosed. According to one method, a bitstream is generated or received, where the bitstream includes a first syntax and a second syntax. The first syntax is related to a target number of bits used to represent a set of third syntaxes and each third syntax specifies one subpicture ID for one subpicture in a set of subpictures. The second syntax is related to a total number of subpictures in the set of subpicture, where a first number that can be represented by the target number of bits is equal to or greater than the total number of subpictures. According to another method, the subpicture ID syntaxes have different values for different subpictures.

公开(公告)号：US20210127133A1

公开(公告)日：2021-04-29

申请号：US16494565

申请日：2018-03-02

Applicant: MEDIATEK INC.

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

IPC: H04N19/577 ,  H04N19/523

Abstract: Method and apparatus of using Bi-directional optical flow (BIO) for a true bi-direction predicted block are disclosed. According to one method of the present invention, a division-free BIO process is disclosed, where the x-motion offset and y-motion offset are derived using operations including right-shifting without any division operation. According to another method, a refined predictor is generated for the current block by applying BIO process to the reference blocks, where said applying the BIO process comprises applying a boundary-condition-dependent BIO process conditionally to boundary pixels associated with the reference blocks.

公开(公告)号：US20200374545A1

公开(公告)日：2020-11-26

申请号：US16968295

申请日：2019-02-11

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/70 ,  H04N19/176

Abstract: Methods and apparatus for a video coding system with the current picture referencing (CPR) mode enabled are disclosed. According to one method, when the current reference picture is equal to the current picture, an integer motion vector flag is inferred to be true without signalling the integer or parsing the motion vector flag. In another method, when all motion vector differences for the current block are equal to zero, an integer motion vector flag is inferred to be true without signalling the integer or parsing the motion vector flag. In yet another method, when all reference pictures for the current block are equal to the current picture: the sub-block prediction coding mode is disabled; and the current block is encoded or decoded by disabling the sub-block prediction coding mode. Alternatively, derived motion vectors associated with sub-blocks for the current block can be converted into integer motion vectors.

公开(公告)号：US20200322602A1

公开(公告)日：2020-10-08

申请号：US16304203

申请日：2017-05-27

Applicant: MEDIATEK INC.

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

IPC: H04N19/119 ,  H04N19/46 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176 ,  H04N19/174

Abstract: Processing methods and apparatuses for video data of a color component comprise receiving input data associated with a current coding block (CB) in a current slice, where the video data is partitioned into multiple CBs according to a partitioning method. A Quantization Parameter (QP) minimum block area or a depth flag is determined and an area of the current CB according to a width and a height or a combined depth of the current CB is calculated and compared with the QP minimum block area or the depth flag. Signaling of QP information for the current CB is conditioned by the comparing result. The QP information for the current CB is used to quantize a residual signal of the current CB or recovering a quantized residual signal of the current CB.

公开(公告)号：US20200068218A1

公开(公告)日：2020-02-27

申请号：US16611611

申请日：2018-05-08

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei HSU ,  Ching-Yeh CHEN ,  Yu-Wen HUANG ,  Tzu-Der CHUANG

IPC: H04N19/56 ,  H04N19/52 ,  H04N19/82 ,  H04N19/176 ,  H04N19/139 ,  H04N19/105

Abstract: Method and apparatus of Inter prediction for video coding performed by a video encoder or a video decoder that utilizes motion vector prediction (MVP) to code a motion vector (MV) associated with a block coded with Inter mode are disclosed. According to one method, an initial MVP candidate list is generated for the current block. When candidate reordering is selected for the current block, target candidates within a selected candidate set are reordered to generate a reordered MVP candidate list and then the current block is encoded at the video encoder side or decoded at the video decoder sider using the reordered MVP candidate list, where the selected candidate set comprises at least partial candidates of the initial MVP candidate list.