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：US20210321089A1

公开(公告)日：2021-10-14

申请号：US17282361

申请日：2019-10-05

Applicant: MEDIATEK INC.

Inventor： Yu-Cheng LIN ,  Chen-Yen LAI ,  Chun-Chia CHEN ,  Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/105 ,  H04N19/136 ,  H04N19/176

Abstract: A method and apparatus of video coding using history-based candidate derivation are disclosed. According to one method, a current block is inside a Shared Merge candidate list Region (SMR) or a history-based parallel processing region is received. The current block is encoded or decoded using a Merge candidate list. Only if the current block is one of first-coded N (N≥0) blocks, one of last-coded N blocks, or one of selected N blocks, the history-based candidate list is updated after the current block is encoded or decoded. In one embodiment, Merge candidate list is pre-generated for the current block in the SMR and is separately generated for the current block in the history-based parallel processing region. In another method, if the current block is inside the SMR or the history-based parallel processing region, the current block is encoded or decoded using a history-based candidate list associated with the root CU.

公开(公告)号：US20200014931A1

公开(公告)日：2020-01-09

申请号：US16503575

申请日：2019-07-04

Applicant: MEDIATEK INC.

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

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/105 ,  H04N19/517

Abstract: Video processing methods and apparatuses for coding a current block by constructing a candidate set including at least a motion candidate and at least an average candidate. The average candidate is derived from motion information of neighboring blocks, and at least one neighboring block used to derive the average candidate is a temporal block in a temporal collocated picture. Each of the neighboring blocks is a spatial neighboring block in a current picture or a temporal block in the temporal collocated picture. A selected candidate is determined from the candidate set as a motion vector predictor for encoding or decoding a motion vector of the current block.

公开(公告)号：US20250056008A1

公开(公告)日：2025-02-13

申请号：US18720890

申请日：2022-12-20

Applicant: MEDIATEK INC.

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

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

Abstract: A video coding system that uses multiple models to predict chroma samples is provided. The video coding system receives data for a block of pixels to be encoded or decoded as a current block of a current picture of a video. The system constructs two or more chroma prediction models based on luma and chroma samples neighboring the current block. The system applies the two or more chroma prediction models to incoming or reconstructed luma samples of the current block to produce two or more model predictions. The system computes predicted chroma samples by combining the two or more model predictions. The system uses the predicted chroma samples to reconstruct chroma samples of the current block or to encode the current block.

公开(公告)号：US20210314560A1

公开(公告)日：2021-10-07

申请号：US17291085

申请日：2019-11-06

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176

Abstract: Video processing methods comprise receiving input data of a current block in a current picture, constructing a candidate list for the current block by including one or more History-based Motion Vector Predictor (HMVP) candidates, selecting one candidate from the candidate list, locating a reference block according to motion information of the selected candidate, and encoding or decoding the current block by predicting the current block using the reference block. The one or more HMVP candidates are fetched from a normal HMVP table if the current block is to be processed by a normal inter prediction mode, and the one or more HMVP candidates are fetched form a Current Picture Referencing (CPR) HMVP table if the current block is to be processed by a CPR mode. The two HMVP tables are separately maintained and updated.

公开(公告)号：US20200344492A1

公开(公告)日：2020-10-29

申请号：US16846514

申请日：2020-04-13

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Chih-Wei HSU

IPC: H04N19/583

Abstract: Method and apparatus for constrained mode signaling are disclosed. According to one method, a plurality of mode syntaxes are used to signal a current mode used for the current block. If one or more of the plurality of candidate modes are unavailable according to one or more conditions related to the current block, signaling a mode syntax is skipped at the video encoder side or parsing the mode syntax is skipped at the video decoder side. In one embodiment, a regular flag indicating on or off of a regular Merge mode or Skip mode is not signaled if Merge mode with MVD (MMVD) mode, Affine mode, subblock Temporal Motion Vector Prediction (SbTMVP) mode, Combined Inter and Intra Prediction (CIIP) Merge mode, and Triangle Prediction Mode (TPM) are disabled as indicated by an SPS flag.

公开(公告)号：US20250080756A1

公开(公告)日：2025-03-06

申请号：US18720901

申请日：2022-12-20

Applicant: MEDIATEK INC.

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: A method and apparatus for inter prediction in video coding system are disclosed. According to the method, one or more model parameters of one or more cross-color models for the second-color block are determined. Then, cross-color predictors for the second-color block are determined, wherein one cross-color predictor value for the second-color block is generated for each second-color pixel of the second-color block by applying said one or more cross-color models to corresponding reconstructed or predicted first-color pixels. The input data associated with the second-color block is encoded using prediction data comprising the cross-color predictors for the second-color block at the encoder side, or the input data associated with the second-color block is decoded using the prediction data comprising the cross-color predictors for the second-color block at the decoder side.

公开(公告)号：US20250063155A1

公开(公告)日：2025-02-20

申请号：US18720919

申请日：2022-12-20

Applicant: MEDIATEK INC.

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

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

Abstract: A method and apparatus for inter prediction in video coding system are disclosed. According to the method, input data associated with a current block comprising at least one colour block are received. A blending predictor is determined according to a weighted sum of at least two candidate predictions generated based on one or more first hypotheses of prediction, one or more second hypotheses of prediction, or both. The first hypotheses of prediction are generated based on one or more intra prediction modes comprising a DC mode, a planar mode or at least one angular modes. The second hypotheses of prediction are generated based on one or more cross-component modes and a collocated block of said at least one colour block. The input data associated with the colour block is encoded or decoded using the blending predictor.

公开(公告)号：US20220124318A1

公开(公告)日：2022-04-21

申请号：US17567302

申请日：2022-01-03

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: Video processing methods comprise receiving input data of a current block in a current picture, constructing a candidate list for the current block by including one or more History-based Motion Vector Predictor (HMVP) candidates, selecting one candidate from the candidate list, locating a reference block according to motion information of the selected candidate, and encoding or decoding the current block by predicting the current block using the reference block. The one or more HMVP candidates are fetched from a normal HMVP table if the current block is to be processed by a normal inter prediction mode, and the one or more HMVP candidates are fetched form a Current Picture Referencing (CPR) HMVP table if the current block is to be processed by a CPR mode. The two HMVP tables are separately maintained and updated.

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.