公开(公告)号：US20170295366A1

公开(公告)日：2017-10-12

申请号：US15632481

申请日：2017-06-26

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Chih-Wei HSU ,  Chia-Yang TSAI ,  Yu-Wen HUANG

IPC: H04N19/11 ,  H04N19/59 ,  H04N19/597 ,  H04N19/159 ,  H04N19/82 ,  H04N19/186 ,  H04N19/593

CPC classification number: H04N19/186 ,  H04N19/11 ,  H04N19/159 ,  H04N19/182 ,  H04N19/59 ,  H04N19/593 ,  H04N19/597 ,  H04N19/82

Abstract: In one implementation, a method operates by receiving neighboring reconstructed first-color pixels and current reconstructed first-color pixels of a current first-color block and receiving neighboring reconstructed second-color pixels of a current second-color block collocated with the current first-color block. The method then determines linear model (LM) parameters according to a linear model for one or more LM Intra modes. The method then receives input data associated with current second-color pixels of the current second-color block and generates a cross-color Intra predictor from the current reconstructed first-color pixels of the current first-color block using the LM parameters associated with a LM Intra mode selected from said one or more LM Intra modes. Finally, the method applies cross-color Intra prediction encoding or decoding to the current second-color pixels of the current second-color block using the cross-color Intra predictor for the selected LM Intra mode.

公开(公告)号：US20160309183A1

公开(公告)日：2016-10-20

申请号：US15101139

申请日：2014-12-26

Applicant: MEDIATEK INC.

Inventor： Yu-Chen SUN ,  Jungsun KIM ,  Tzu-Der CHUANG ,  Yi-Wen CHEN ,  Wang Lin LAI ,  Shan LIU ,  Yu-Wen HUANG

IPC: H04N19/593 ,  H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/593 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186

Abstract: A method and apparatus for color index coding of a block of video data using index prediction based on reconstructed neighboring pixels are disclosed. In one embodiment, color index encoding or decoding is applied to the current pixel indices by deriving index prediction from neighboring pixel indices of the reconstructed neighboring pixels. The reconstructed neighboring pixel values are first transformed into the neighboring pixel indices according to a quantization table to map between major color indices and major color values of the current block. The quantization table can be based on a major color table for the current block or can also be derived at a decoder side. The decoding process may reconstruct the current pixels by converting decoded current pixel indices to reconstructed current pixel values according to the quantization table or by directly copying the reconstructed neighboring pixel values indicated by decoded current pixel indices.

Abstract translation: 公开了使用基于重构的相邻像素的索引预测对视频数据块进行颜色索引编码的方法和装置。 在一个实施例中，通过从重建的相邻像素的相邻像素索引导出索引预测，将颜色索引编码或解码应用于当前像素索引。 首先根据量化表将重建的相邻像素值变换为相邻像素索引，以在主要颜色索引和当前块的主要颜色值之间进行映射。 量化表可以基于当前块的主色表或也可以在解码器侧得到。 解码处理可以通过根据量化表将解码的当前像素索引转换为重构的当前像素值或通过直接复制由解码的当前像素索引指示的重建的相邻像素值来重构当前像素。

公开(公告)号：US20160301938A1

公开(公告)日：2016-10-13

申请号：US15038599

申请日：2015-01-07

Applicant: MediaTek Inc.

Inventor： Yu-Chen SUN ,  Tzu-Der CHUANG ,  Yi-Wen CHEN ,  Yu-Wen HUANG

IPC: H04N19/186 ,  H04N19/93 ,  H04N19/182 ,  H04N19/463 ,  H04N19/176

Abstract: A method and apparatus for coding a block of video data using index or pixel value prediction including a copy-by-pattern-search mode are disclosed. According to the present invention, a current search pattern is determined based on one or more previous coded pixels. One or more predictors are derived according to the current search pattern for a current index or pixel value of a current pixel in the current block. Encoding or decoding is then applied to one or more following indices or pixel values of one or more following pixels including the current pixel using the predictors. In a simplest case, the one or more previous coded pixels correspond to a single previous coded pixel at the left side of the current pixel and the one or more following pixels contain only the current pixel.

Abstract translation: 公开了一种使用包括逐模式搜索模式的索引或像素值预测对视频数据块进行编码的方法和装置。 根据本发明，基于一个或多个以前的编码像素来确定当前搜索模式。 根据当前搜索模式导出当前块中当前像素的当前索引或像素值的一个或多个预测值。 然后，使用预测器将编码或解码应用于包括当前像素的一个或多个跟随像素的一个或多个跟随索引或像素值。 在最简单的情况下，一个或多个先前的编码像素对应于当前像素左侧的单个先前编码像素，并且一个或多个跟随像素仅包含当前像素。

公开(公告)号：US20150350676A1

公开(公告)日：2015-12-03

申请号：US14433356

申请日：2013-09-18

Applicant: MEDIATEK INC.

Inventor： Yi-Wen CHEN ,  Jian-Liang LIN ,  Yu-Wen HUANG

IPC: H04N19/597 ,  H04N19/426 ,  H04N19/115 ,  H04N19/15 ,  H04N19/176 ,  H04N19/33 ,  H04N19/13

CPC classification number: H04N19/597 ,  H04N19/115 ,  H04N19/13 ,  H04N19/15 ,  H04N19/176 ,  H04N19/33 ,  H04N19/426 ,  H04N19/428 ,  H04N19/513

Abstract: A method and apparatus for three-dimensional video coding, multi-view video coding and scalable video coding are disclosed. Embodiments of the present invention use two stage motion data compression to reduce motion data buffer requirement. A first-stage motion data compression is applied after each texture picture or depth map is coded to reduce motion data buffer requirement. Accordingly, first compressed motion data is stored in reduced resolution in the buffer to reduce storage requirement and the first compressed motion data is used for coding process of other texture pictures or depth maps in the same access unit. After all pictures in an access unit are coded, motion data associated with the access unit is further compressed and the second compressed motion data is used during coding process of pictures in other access unit.

Abstract translation: 公开了一种用于三维视频编码，多视点视频编码和可缩放视频编码的方法和装置。 本发明的实施例使用两级运动数据压缩来减少运动数据缓冲器的需求。 在每个纹理图像或深度图被编码之后应用第一阶段运动数据压缩以减少运动数据缓冲器要求。 因此，第一压缩运动数据以降低的分辨率存储在缓冲器中以减少存储要求，并且第一压缩运动数据用于在相同存取单元中的其他纹理图像或深度图的编码处理。 在访问单元中的所有图像被编码之后，与访问单元相关联的运动数据被进一步压缩，并且在其他访问单元中的图像的编码处理期间使用第二压缩运动数据。

公开(公告)号：US20250150601A1

公开(公告)日：2025-05-08

申请号：US18684245

申请日：2022-08-15

Applicant: MEDIATEK INC.

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

IPC: H04N19/176 ,  G06V10/75 ,  H04N19/513

Abstract: A video coding system that reorders prediction candidates is provided. A video coder receives data for a block of pixels to be encoded or decoded as a current block of a current picture of a video. The video coder identifies possible candidate prediction positions. The video coder computes a cost for each of the identified possible candidate prediction positions. The video coder assigns, based on the computed costs, a reordered index to each of N lowest cost candidate prediction positions from the identified possible candidate prediction positions. The video coder selects a candidate prediction position using the assigned reordered indices, wherein the selection is signaled in or parsed from the bitstream. The video coder encodes or decodes the current block by using the selected candidate prediction position.

公开(公告)号：US20250071260A1

公开(公告)日：2025-02-27

申请号：US18727004

申请日：2023-01-10

Applicant: MEDIATEK INC.

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/182

Abstract: A method and apparatus for video coding are disclosed. According to the method, a set of MC (Motion Compensation) candidates with each MC candidate comprising predicted samples for coding boundary pixels of the current block are determined. The set of MC candidates comprises a first candidate, and wherein the first candidate corresponds to a weighted sum of first predicted pixels generated according to first motion information of the current block and second predicted pixels generated according to second motion information of a neighbouring boundary block of the current block. Boundary matching costs associated with the set of MC candidates are determined respectively. A final candidate is determined from the set of MC candidates based on the boundary matching costs. The current block is encoded or decoded using the final candidate.

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：US20240357153A1

公开(公告)日：2024-10-24

申请号：US18684787

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: H04N19/513 ,  G06V10/75 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/513 ,  G06V10/751 ,  H04N19/139 ,  H04N19/176

Abstract: Method and apparatus for template matching with a determined area are disclosed. According to this method, a current template comprising current neighbouring pixels on an above side of the current block, on a left side of the current block, or a combination thereof for a current block is received. An area in a reference picture is then determined, where the reference picture corresponds to a previously coded picture. A matching result between a restricted reference template of a reference block and the current template is then determined, wherein the restricted reference template is generating by using only neighbouring reference pixels of a reference template inside the determined area, the reference template has a same shape as the current template, and a location of the reference template is determined according to a target motion vector (MV) from the current template.

公开(公告)号：US20230388546A1

公开(公告)日：2023-11-30

申请号：US17825269

申请日：2022-05-26

Applicant: MEDIATEK INC.

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

IPC: H04N19/625 ,  H04N19/122 ,  H04N19/176 ,  H04N19/18 ,  H04N19/124 ,  H04N19/423

CPC classification number: H04N19/625 ,  H04N19/122 ,  H04N19/176 ,  H04N19/18 ,  H04N19/124 ,  H04N19/423

Abstract: Video encoding methods and apparatuses in a video encoding system receive an input residual signal of a current block by a shared transform circuit, apply horizontal transform and vertical transform by a shared transform circuit to generate transform coefficients, apply quantization and inverse quantization to generate recovered transform coefficients, apply inverse vertical transform and inverse horizontal transform to the recovered transform coefficients by the shared transform circuit to generate a reconstructed residual signal for the current block, and encode the current block based on quantized levels of the current block. The shared transform circuit and a coefficient buffer in the folded 4-time transform architecture reuse computation resources in each transform stage. In some embodiments of the folded 4-time transform architecture, a hierarchical design for block size grouping is implemented with fixed throughput for uniform hardware scheduling.

公开(公告)号：US20230345029A1

公开(公告)日：2023-10-26

申请号：US17728392

申请日：2022-04-25

Applicant: MEDIATEK INC.

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

IPC: H04N19/463 ,  H04N19/172 ,  H04N19/52 ,  H04N19/139 ,  H04N19/82 ,  H04N19/117 ,  H04N19/136 ,  H04N19/184

CPC classification number: H04N19/463 ,  H04N19/172 ,  H04N19/52 ,  H04N19/139 ,  H04N19/82 ,  H04N19/117 ,  H04N19/136 ,  H04N19/184

Abstract: Method and apparatus for affine CPMV or ALF refinement are mentioned. According to this method, statistical data associated with the affine CPMV or ALF refinement are collected over a picture area. Updated parameters for the affine CPMV refinement or the ALF refinement are then derived based on the statistical data, where a process to derive the updated parameters includes performing multiplication using a reduced-precision multiplier for the statistical data. The reduced-precision multiplier truncates at least one bit of the mantissa part. In another embodiment, the process to derive the updated parameters includes performing reciprocal for the statistical data using a lookup table with (m−k)-bit input by truncating k bits from the m-bit mantissa part, and contents of the lookup table includes m-bit outputs. m and k are positive integers.