公开(公告)号：US20240357081A1

公开(公告)日：2024-10-24

申请号：US18684783

申请日：2022-08-18

Applicant: MEDIATEK INC.

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

IPC: H04N19/105 ,  H04N19/167 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/105 ,  H04N19/167 ,  H04N19/176 ,  H04N19/521

Abstract: A method and apparatus for video coding system that utilizes low-latency template-matching motion-vector refinement are disclosed. According to this method, input data associated with a current block of a video unit in a current picture are received. Motion compensation is then applied to the current block according to an initial motion vector (MV) to obtain initial motion-compensated predictors of the current. After applying the motion compensation to the current block, template-matching MV refinement is applied to the current block to obtain a refined MV for the current block. The current block is then encoded or decoded using information including the refined MV. The method may further comprise determining gradient values of the initial motion-compensated predictors. The initial motion-compensated predictors can be adjusted by taking into consideration of the gradient values and/or MV difference between the refined and initial MVs.

公开(公告)号：US20240014891A1

公开(公告)日：2024-01-11

申请号：US18329712

申请日：2023-06-06

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Bao-Chi PENG ,  Chen-I LIAO ,  Shao-Chou HUNG ,  I-Kang FU

IPC: H04B7/185 ,  H04W16/28

CPC classification number: H04B7/18513 ,  H04W16/28

Abstract: A method can include determining an initial beam configuration by a controller at a satellite in a non-terrestrial network (NTN); applying the initial beam configuration to control an antenna array to transmit a beam to cover a target service area; determining subsequent beam configurations, by the controller, corresponding to a sequence of locations along an orbit of the satellite; and applying the subsequent beam configurations at each of the sequence of locations successively to control the antenna array to transmit respective beams to cover the target service area while the satellite is flying along the orbit. The controller determines the initial beam configuration and the subsequent beam configurations in a way that a variation of beam footprints of the beams is minimized to realize a constant beam footprint corresponding to the target service area.

公开(公告)号：US20230362403A1

公开(公告)日：2023-11-09

申请号：US17736144

申请日：2022-05-04

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/423

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/423

Abstract: Video encoding or decoding methods and apparatuses include receiving input data associated with a current block in a current picture, determining a preload region in a reference picture shared by two or more coding configurations of affine prediction or motion compensation or by two or more affine refinement iterations, loading reference samples in the preload region, generating predictors for the current block, and encoding or decoding the current block according to the predictors. The predictors associated with the affine refinement iterations or coding configurations are generated based on some of the reference samples in the preload region.

公开(公告)号：US20230199196A1

公开(公告)日：2023-06-22

申请号：US17702396

申请日：2022-03-23

Applicant: MEDIATEK INC.

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

IPC: H04N19/154 ,  H04N19/103 ,  H04N19/18 ,  H04N19/176

CPC classification number: H04N19/154 ,  H04N19/103 ,  H04N19/18 ,  H04N19/176

Abstract: Video encoding methods and apparatuses for frequency domain mode decision include receiving residual data of a current block, testing multiple coding modes on the residual data, calculating a distortion associated with each of the coding modes in a frequency domain, performing a mode decision to select a best coding mode from the tested coding modes according to the distortion calculated in the frequency domain, and encoding the current block based on the best coding mode.

公开(公告)号：US20230065083A1

公开(公告)日：2023-03-02

申请号：US17552963

申请日：2021-12-16

Applicant: MEDIATEK INC.

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

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/169 ,  H04N19/186 ,  H04N19/176 ,  H04N19/105

Abstract: Low-latency video coding methods and apparatuses include receiving input data associated with a current Intra slice composed of Coding Tree Units (CTU), where each CTU includes luma and chroma Coding Tree Blocks (CTBs), partitioning each CTB into non-overlapping pipeline units, and encoding or decoding the CTUs in the current Intra slices by performing processing of chroma pipeline units after beginning processing of luma pipeline units in at least one pipeline stage. Each of the pipeline units is processed by one pipeline stage after another pipeline stage, and different pipeline stages process different pipeline units simultaneously. The pipeline stage in the low-latency video coding methods and apparatuses simultaneously processes one luma pipeline unit and at least one previous chroma pipeline unit within one pipeline unit time interval.

公开(公告)号：US20220360789A1

公开(公告)日：2022-11-10

申请号：US17768622

申请日：2020-11-25

Applicant: MEDIATEK INC.

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

IPC: H04N19/137 ,  H04N19/59 ,  H04N19/176

Abstract: A method and apparatus for video coding are disclosed. According to this method, a current block is received at an encoder side or compressed data comprising the current block is received at a decoder side, where the current block is partitioned into two geometric prediction units. Motion information for the two geometric prediction units is determined. Weighting information for the two geometric prediction units is determined. A motion storage type variable based on the weighting information is determined, where the motion information associated with the current block is stored according to a value of the motion storage type variable. A geometric predictor for the current block is generated by blending two geometric predictors according to the weighting information, where the two geometric predictors are derived for the two geometric prediction units using the motion information associated with the current block.

公开(公告)号：US20210266589A1

公开(公告)日：2021-08-26

申请号：US17265949

申请日：2019-08-15

Applicant: MEDIATEK INC.

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

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

Abstract: A method and apparatus of Inter prediction for video coding are disclosed. According to one method, a sub-block motion vector prediction (MVP) mode is turned off for small size coding units (CUs). In another method, if the neighbouring reference block for a current coding unit (CU) is in a root CU region, the neighbouring reference block is not used to derive a Merge candidate or a modified neighbouring reference block on the shared boundary of the root CU is used to derive the Merge candidate for the current block. In yet another method, a shared sub-block Merge candidate list is derived for sub-CUs within a root CU region or an MER (Merge estimation region). If a neighbouring reference block is within the same MER as a current sub-CU, the neighbouring reference block is not used for deriving a candidate for the shared sub-CU Merge list.

公开(公告)号：US20210250580A1

公开(公告)日：2021-08-12

申请号：US17257929

申请日：2019-08-02

Applicant: MEDIATEK INC.

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/137 ,  H04N19/70 ,  H04N19/176

Abstract: A method and apparatus Inter prediction for video coding including IBC (Intra Block Copy) coding tool are disclosed. According to one method, a current permitted band inside the current picture for the current block is identified. A target IBC candidate is selected, where a target block vector of the target IBC candidate points from the current block to a target reference block in the current picture. An adjusted candidate list is generated by taking into account of the target IBC candidate and the current permitted band. The current motion information associated with the current block is encoded using the adjusted candidate list at the video encoder side or decoded using the adjusted candidate list at the video decoder side using the adjusted candidate list. In another method, a syntax for a target MVD (Motion Vector Difference) is decoded without sign information or with reduced sign information of the target MVD.

公开(公告)号：US20210160482A1

公开(公告)日：2021-05-27

申请号：US17104037

申请日：2020-11-25

Applicant: MEDIATEK INC.

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/52 ,  H04N19/30 ,  H04N19/46 ,  H04N19/176

Abstract: Video processing methods and apparatuses for processing a current block in a current picture include receiving input data of the current block, determining a reference picture, determining whether picture sizes of the current and reference pictures are different, determining whether horizontal wraparound motion compensation is enabled for predicting the current block, performing motion compensation for the current block to obtain a reference block from the reference picture, and encoding or decoding the current block according to the reference block. Horizontal wraparound motion compensation is disabled when the picture sizes of the current and reference pictures are different.

公开(公告)号：US20210014536A1

公开(公告)日：2021-01-14

申请号：US16977158

申请日：2019-03-13

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chia-Ming TSAI ,  Yu-Chi SU ,  Chen-Yen LAI ,  Chih-Wei HSU ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG ,  Han HUANG

IPC: H04N19/70 ,  H04N19/64 ,  H04N19/66 ,  H04N19/89 ,  H04N19/174

Abstract: In one method, the current block is partitioned into multiple final sub-blocks using one or more stages of sub-tree partition comprising ternary tree partition and at least one other-type partition, where ternary partition tree is excluded from the sub-tree partition if a current sub-tree depth associated with a current sub-block is greater than a first threshold and the first threshold is an integer greater than or equal to 1. In another method, if a test condition is satisfied, the current block is encoded or decoded using a current Inter mode selected from a modified group of Inter tools, where the modified group of Inter tools is derived from an initial group of Inter tools by removing one or more first Inter tools from the initial group of Inter tools, replacing one or more second Inter tools with one or more complexity-reduced Inter tools, or both.