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.

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：US20250071288A1

公开(公告)日：2025-02-27

申请号：US18728992

申请日：2023-01-18

Applicant: MEDIATEK INC.

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

IPC: H04N19/136 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

Abstract: A method and apparatus for video coding are disclosed. According to the method for the decoder side, encoded data associated with a current block comprising a first-colour block and a second-colour block are received. An inherited model parameter set is determined from a previously coded block coded in a first CCLM related mode, wherein the inherited model parameter set comprises a first scaling parameter associated with the first CCLM related mode. A final inherited model parameter set is derived if an update value for the inherited model parameter set is determined, where the final inherited model parameter set is determined based on the first scaling parameter and the update value. Then, the encoded data associated with the second-colour block are decoded using prediction data based on an updated CCLM related model associated with the final inherited model parameter set. A method and apparatus for the encoder side are also disclosed.

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：US20240049273A1

公开(公告)日：2024-02-08

申请号：US18361045

申请日：2023-07-28

Applicant: MEDIATEK INC. ,  National Taiwan University

Inventor： Hao-Wei LEE ,  I-Kang FU ,  Chun-Chia CHEN ,  Chen-I LIAO ,  Hung-Yu WEI

IPC: H04W72/542 ,  H04B7/185

CPC classification number: H04W72/542 ,  H04B7/18539

Abstract: This disclosure provides a method, an apparatus, and a non-transitory computer-readable medium for radio resource allocation for a terrestrial network (TN) cell. In the method, the TN cell is determined to be outside a coverage of a first non-terrestrial network (NTN) cell. In response to the TN cell being outside the coverage of the first NTN cell, a radio resource is allocated to the TN cell based on a radio resource of the first NTN cell.

公开(公告)号：US20240049212A1

公开(公告)日：2024-02-08

申请号：US18356106

申请日：2023-07-20

Applicant: MEDIATEK INC. ,  National Taiwan University

Inventor： Hao-Wei LEE ,  I-Kang FU ,  Chun-Chia CHEN ,  Chen-I LIAO ,  Hung-Yu WEI

IPC: H04W72/121 ,  H04B7/185

CPC classification number: H04W72/121 ,  H04B7/18513

Abstract: A method for performing radio resource allocation in a TN-NTN mixed system is provided. The system includes a satellite that covers an NTN cell, and a plurality of TN base stations (TN BSs) within a coverage of the satellite. The NTN cell serves a plurality of NTN user equipments (NTN UEs). The method includes dividing the plurality of NTN UEs into X NTN UE groups; partitioning a radio resource into M parts, where M≥X; dividing the plurality of TN BSs into M TN BS groups; deciding radio resource allocation regarding the plurality of NTN UEs, by allocating an i-th part of the radio resource to an i-th NTN UE group, where i=1, 2, . . . , X; and deciding radio resource allocation regarding the plurality of TN BSs, by allocating a sum of a j-th to an M-th parts of the radio resource to a j-th TN BS group, where j=1, 2, . . . , M.

公开(公告)号：US20230335914A1

公开(公告)日：2023-10-19

申请号：US18299162

申请日：2023-04-12

Applicant: MEDIATEK INC.

Inventor： Shao-Chou HUNG ,  Bao-Chi PENG ,  Chun-Chia CHEN ,  I-Kang FU ,  Abdelkader MEDLES ,  Gilles CHARBIT

IPC: H01Q15/24

CPC classification number: H01Q15/246 ,  H01Q15/244

Abstract: Provided is an apparatus for transmitting a circularly polarized signal by linearly polarized antennas. A horizontally polarized antenna and a vertically polarized antenna of the apparatus receives a first circularly polarized signal transmitted based on a transmitted baseband signal vector. Based on the first circularly polarized signal, a radio frequency (RF) module of the apparatus generates a received baseband signal vector including a product of the transmitted baseband signal vector and a receiving polarization vector of the transmitted baseband signal vector. Processing circuitry of the apparatus estimates the receiving polarization vector based on the received baseband signal vector and calibrates power amplifiers (PAs) and local oscillator (LO) signals of frequency converters in the RF module based on the estimated receiving polarization vector. The horizontally and vertically polarized antennas transmit a second circularly polarized signal based on the calibrated PAs and the calibrated LO signals of the frequency converters.

公开(公告)号：US20230328256A1

公开(公告)日：2023-10-12

申请号：US17714527

申请日：2022-04-06

Applicant: MEDIATEK INC.

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

IPC: H04N19/147 ,  H04N19/105 ,  H04N19/18 ,  H04N19/176 ,  H04N19/70 ,  H04N19/46

CPC classification number: H04N19/147 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176 ,  H04N19/70 ,  H04N19/18

Abstract: Methods and apparatus for video coding system utilizing Rate-Distortion Optimized Quantization (RDOQ) are provided. According to one method, a rate for a level belonging to a level set of a current quantized transform coefficient is estimated for a current coefficient group (CG) based on neighboring quantized coefficients of the current quantized transform coefficient and the current CG. A best level for the current quantized transform coefficient is selected from the level set for a best RD-cost. In another method, a TB is partitioned into M regions and M best regions are derived for the M regions according to RDOQ. At least two alternative region RD-costs are generated for each of the M best regions based on a relative position between each of the M best regions and a last significant region in the TB. TB RD-cost for the TB is selected according a last non-zero best region position.

公开(公告)号：US20230171403A1

公开(公告)日：2023-06-01

申请号：US17702372

申请日：2022-03-23

Applicant: MEDIATEK INC.

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/176 ,  H04N19/174

CPC classification number: H04N19/117 ,  H04N19/82 ,  H04N19/174 ,  H04N19/176

Abstract: Video encoding methods and apparatuses include collecting statistics data, determining a matrix and vector representing a set of linear equations, solving the matrix and vector by a novel Gaussian elimination method to derive optimal parameter adjustments for an affine mode or adaptive loop filter coefficients, and encoding the current block by the affine mode or encoding one or more blocks by applying ALF filtering. Embodiments of the novel Gaussian elimination method reduce the critical path of entry operations in each row elimination step from one reciprocal, two multiplication, and one addition operations to one reciprocal, one multiplication, and one addition operations, or one multiplication and one addition operations.