公开(公告)号：US10225555B2

公开(公告)日：2019-03-05

申请号：US15572600

申请日：2016-05-19

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H03M7/42 ,  H04N19/13 ,  H04N19/91 ,  H04N19/196 ,  H04N19/423

Abstract: A method and apparatus of entropy coding for a video encoder or decoder using multiple-table based Context-Based Adaptive Binary Arithmetic Coder (CABAC) are disclosed. In one embodiment, a current bin of a binary data of a current coding symbol is encoded or decoded according to a probability of a binary value of the current bin and the probability of the binary value is updated according to the binary value of the current bin for a next bin by using multiple-parameter probability models. Each multiple-parameter probability model is updated using at least one lookup table with the individual set of probability state as a table index to access contents of said at least one lookup table. In another embodiment, the range update is calculated for a range interval based on middle value of the range interval.

公开(公告)号：US20180338154A1

公开(公告)日：2018-11-22

申请号：US15966570

申请日：2018-04-30

Applicant: MEDIATEK INC.

Inventor： Han HUANG ,  Xiaozhong Xu ,  Tzu-Der Chuang

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

Abstract: Aspects of the disclosure include a video decoding device that includes a processing circuit. The processing circuit is configured to receive encoded video data associated with a current block of a current image frame, determine a set of candidate motion vectors for the current block, determine a selection index based on the encoded video data, and select one of the set of candidate motion vectors based on the selection index. The processing circuit is further configured to refine the selected candidate motion vector to become a reconstructed motion vector when the selected candidate motion vector meets a predetermined condition, and generate an image of the current image frame for output, including generating a reconstructed image of the current block based on the reconstructed motion vector.

公开(公告)号：US20160142706A1

公开(公告)日：2016-05-19

申请号：US15007509

申请日：2016-01-27

Applicant: MediaTek Inc.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shan Liu ,  Zhi Zhou ,  Shaw-Min Lei

IPC: H04N19/11 ,  H04N19/169 ,  H04N19/176 ,  H04N19/44 ,  H04N19/136

Abstract: A method for chroma intra prediction mode decoding includes decoding a chroma intra prediction mode for a current chroma block according to a codeword set corresponding to a chroma intra prediction mode set, wherein the codeword set comprises at least one codeword with a first length type and at least one codeword with a second length type. If a codeword is one of said at least one codeword with the first length type, the chroma intra prediction mode is decoded as a Luma-based chroma prediction Mode (LM) or a Direct Mode (DM). The method also includes determines the chroma intra prediction mode based on an intra prediction mode of a current luma block if the chroma intra prediction mode is the DM.

Abstract translation: 色度帧内预测模式解码方法包括根据对应于色度帧内预测模式集合的码字集解码当前色度块的色度帧内预测模式，其中码字组包括至少一个第一长度类型的码字， 具有第二长度类型的至少一个码字。 如果码字是具有第一长度类型的所述至少一个码字之一，则色度帧内预测模式被解码为基于亮度的色度预测模式（LM）或直接模式（DM）。 该方法还包括如果色度帧内预测模式是DM，则基于当前亮度块的帧内预测模式来确定色度帧内预测模式。

公开(公告)号：US20150264355A1

公开(公告)日：2015-09-17

申请号：US14660454

申请日：2015-03-17

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang ,  Tzu-Der Chuang

IPC: H04N19/13 ,  H04N19/12 ,  H04N19/139 ,  H04N19/91 ,  H04N19/17 ,  H04N19/21 ,  H04N19/52 ,  H04N19/109 ,  H04N19/196

CPC classification number: H04N19/91 ,  H04N19/517

Abstract: A method of efficient information coding is provided. The method may code a bin string for signaling prefix part of a binarized absolute value of a first vector component of a block vector difference (BVD) or a motion vector difference (MVD). The method may code a bin string for signaling a prefix part of a binarized absolute value of a second vector component of the BVD or the MVD. The method may also code a bin string for signaling a suffix part of a binarized absolute value and a sign of the first vector component. The method may further code a bin string for signaling a suffix part of a binarized absolute value and a sign of the second vector component.

Abstract translation: 提供了一种高效的信息编码方法。 该方法可以编码块向量差（BVD）或运动矢量差（MVD）的第一矢量分量的二进制绝对值的信令前缀部分的bin字符串。 该方法可以编码用于发送BVD或MVD的第二矢量分量的二进制绝对值的前缀部分的bin字符串。 该方法还可以编码用于发送二进制绝对值的后缀部分和第一向量分量的符号的bin字符串。 该方法还可以对用于发信号通知二进制绝对值的后缀部分和第二矢量分量的符号的二进制串。

公开(公告)号：US20140219357A1

公开(公告)日：2014-08-07

申请号：US14239302

申请日：2012-10-18

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Jian-Liang Lin ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC: H04N19/51 ,  H04N19/583

CPC classification number: H04N19/52 ,  H04N19/50 ,  H04N19/51 ,  H04N19/593 ,  H04N19/70

Abstract: A method and apparatus for deriving a motion vector predictor (MVP) candidate set for a block are disclosed. Embodiments according to the present invention generate a complete full MVP candidate set based on the redundancy-removed MVP candidate set if one or more redundant MVP candidates exist. In one embodiment, the method generates the complete full MVP candidate set by adding replacement MVP candidates to the redundancy-removed MVP candidate set and a value corresponding to a non-redundant MVP is assigned to each replacement MVP candidate. In another embodiment, the method generates the complete full MVP candidate set by adding replacement MVP candidates to the redundancy-removed MVP candidate set and a value is as signed to each replacement MVP candidate according to a rule. The procedure of assigning value, checking redundancy, removing redundant MVP candidate are repeated until the MVP candidate set is complete and full.

Abstract translation: 公开了一种用于导出用于块的运动矢量预测器（MVP）候选集的方法和装置。 如果存在一个或多个冗余MVP候选者，则根据本发明的实施例基于冗余删除的MVP候选集来生成完整的完整MVP候选集。 在一个实施例中，该方法通过将替换MVP候选添加到冗余删除的MVP候选集中来生成完整的完整MVP候选集，并且将对应于非冗余MVP的值分配给每个替换MVP候选。 在另一个实施例中，该方法通过将替换MVP候选添加到冗余删除的MVP候选集中并根据规则将值与签名的每个替换MVP候选来生成完整的完整MVP候选集。 重复分配值，检查冗余，删除冗余MVP候选的过程，直到MVP候选集完成并满。

公开(公告)号：US12256094B2

公开(公告)日：2025-03-18

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

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：US12143580B2

公开(公告)日：2024-11-12

申请号：US17260008

申请日：2019-07-12

Applicant: MEDIATEK INC.

Inventor： Chia-Ming Tsai ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Tzu-Der Chuang ,  Yu-Wen Huang

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/436 ,  H04N19/70 ,  H04N19/96 ,  H04N19/174

Abstract: Video processing methods and apparatuses in a video encoding or decoding system for processing a video picture partitioned into blocks with one or more partition constraints. The video encoding or decoding system receives input data of a current block and checks whether a predefined splitting type is allowed to partition the current block according to first and second constraints. The first constraint restricts each sub-block partitioned from the current block to be completely contained in one pipeline unit, and the second constraint restricts each sub-block partitioned from the current block to contain one or more complete pipeline units. The pipeline units are non-overlapping units in the video picture designed for pipeline processing. The current block is not partitioned by the predefined splitting type if any sub-block partitioned by the predefined splitting type violates both the first and second constraints. The system encodes or decodes the current block.

公开(公告)号：US12069257B2

公开(公告)日：2024-08-20

申请号：US17265957

申请日：2019-08-16

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen

IPC: H04N19/119 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/119 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/70 ,  H04N19/96

Abstract: Video data processing methods and apparatuses receive input data associated with a current split node partitioned from a parent node by a splitting type, determine a depth of the current split node according to the splitting type, and compare the depth of the current split node with a maximum delta QP signaling depth. A video decoding system derives a delta QP from one or more syntax elements signaled in a TU associated with the current split node according to the comparing result, reconstructs a final QP for the current split node based on a reference QP and the delta QP, and decodes one or more TUs associated with the current split node using the final QP. The depth is counted in a way considering different splitting types and splitting partitions.

公开(公告)号：US11973985B2

公开(公告)日：2024-04-30

申请号：US17892933

申请日：2022-08-22

Applicant: MediaTek Inc.

Inventor： Chih-Yao Chiu ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N11/02 ,  H04N19/105 ,  H04N19/109 ,  H04N19/117 ,  H04N19/119 ,  H04N19/137 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/177 ,  H04N19/182 ,  H04N19/615

CPC classification number: H04N19/615 ,  H04N19/105 ,  H04N19/109 ,  H04N19/117 ,  H04N19/119 ,  H04N19/137 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/177 ,  H04N19/182

Abstract: Various schemes pertaining to pre-encoding processing of a video stream with motion compensated temporal filtering (MCTF) are described. An apparatus determines a filtering interval for a received raw video stream having pictures in a temporal sequence. The apparatus selects from the pictures a plurality of target pictures based on the filtering interval, as well as a group of reference pictures for each target picture to perform pixel-based MCTF, which generates a corresponding filtered picture for each target picture. The apparatus subsequently transmits the filtered pictures as well as non-target pictures to an encoder for encoding the video stream. Subpictures of natural images and screen content images are separately processed by the apparatus.

公开(公告)号：US11956469B2

公开(公告)日：2024-04-09

申请号：US17603505

申请日：2020-04-15

Applicant: MEDIATEK INC.

Inventor： Man-Shu Chiang ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N19/60 ,  H04N19/12 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/60 ,  H04N19/12 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/70

Abstract: Video processing methods and apparatuses implemented in a video encoding or decoding system with conditional secondary transform signaling. The video encoding system determines and applies a transform operation to residuals of a transform block to generate final transform coefficients, and adaptively signals a secondary transform index according to a position of a last significant coefficient in the transform block. A value of the secondary transform index is determined according to the transform operation. The video decoding system parses last significant coefficient position syntax of each transform block in the current block from a video bitstream to determine a position of a last significant coefficient for each transform block, and infers inverse secondary transform is not applied to the current block according to the positions of the last significant coefficients; otherwise, the video decoding system determines an inverse transform operation by parsing a secondary transform index from the video bitstream.