公开(公告)号：US20150326875A1

公开(公告)日：2015-11-12

申请号：US14704980

申请日：2015-05-06

Applicant: MEDIATEK INC.

Inventor： Chun-Chia Chen ,  Yung-Chang Chang

IPC: H04N19/52 ,  H04N19/56 ,  H04N19/59 ,  H04N19/33

CPC classification number: H04N19/59 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/33 ,  H04N19/513 ,  H04N19/52 ,  H04N19/521 ,  H04N19/55 ,  H04N19/56

Abstract: A video processing method includes: receiving a motion vector of a prediction block in a current frame; performing a first motion vector scaling operation upon the motion vector to generate a first scaled motion vector; after the first scaled motion vector is generated, utilizing a motion vector clamping circuit for performing a first motion vector clamping operation upon the first scaled motion vector to generate a first clamped motion vector; and determining a position of a reference block of a reference frame according to at least the first clamped motion vector.

Abstract translation: 视频处理方法包括：接收当前帧中的预测块的运动矢量; 对所述运动矢量执行第一运动矢量缩放运算以产生第一缩放运动矢量; 在产生第一缩放运动矢量之后，利用运动矢量钳位电路根据第一缩放运动矢量执行第一运动矢量钳位运算以产生第一夹紧运动矢量; 以及至少根据所述第一夹持运动矢量确定参考系的参考块的位置。

公开(公告)号：US20140292790A1

公开(公告)日：2014-10-02

申请号：US14225417

申请日：2014-03-25

Applicant: MEDIATEK INC.

Inventor： Chun-Chia Chen ,  Chi-Cheng Ju ,  Yung-Chang Chang

IPC: G06T1/60

CPC classification number: G06T1/60 ,  G06T7/408 ,  G06T7/90 ,  G06T2207/20021 ,  H04N19/433 ,  H04N19/51

Abstract: An exemplary data arrangement method for a picture includes at least the following steps: obtaining pixel data of a plurality of first N-bit pixels of the picture; and storing the obtained pixel data of the first N-bit pixels in a plurality of M-bit storage units of a first buffer based on a raster-scan order of the picture, wherein M and N are positive integers, and M is not divisible by N. Besides, at least one of the M-bit storage units is filled with part of the obtained pixel data of the first N-bit pixels, and the first N-bit pixels include at least one pixel divided into a first part stored in one of the M-bit storage units in the first buffer and a second part stored in another of the M-bit storage units in the first buffer.

Abstract translation: 用于图像的示例性数据排列方法至少包括以下步骤：获得图像的多个第一N位像素的像素数据; 并且基于所述图像的光栅扫描顺序将所获得的所述第一N位像素的所述像素数据存储在第一缓冲器的多个M位存储单元中，其中M和N是正整数，并且M不可整除 此外，M位存储单元中的至少一个填充了所获得的第一N位像素的像素数据的一部分，并且第一N位像素包括被分为存储的第一部分的至少一个像素 在第一缓冲器中的M位存储单元之一中，以及存储在第一缓冲器中的另一个M位存储单元中的第二部分。

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：US12143601B2

公开(公告)日：2024-11-12

申请号：US17110208

申请日：2020-12-02

Applicant: MediaTek Inc.

Inventor： Chih-Wei Hsu ,  Lulin Chen ,  Yu-Ling Hsiao ,  Chun-Chia Chen ,  Ching-Yeh Chen ,  Chen-Yen Lai

IPC: H04N19/167 ,  H04N19/169 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A method for specifying layout of subpictures in video pictures is provided. A video decoder receives data from a bitstream to be decoded as a current picture of a video. For a current subpicture of a set of subpictures of the current picture, the video decoder determines a position of the current subpicture based on a width and a height of the current picture and a previously determined width and height of a particular subpicture in the set of subpictures. The video decoder reconstructs the current picture and the current subpicture based on the determined position.

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：US11950016B2

公开(公告)日：2024-04-02

申请号：US16848858

申请日：2020-04-15

Applicant: MEDIATEK INC.

Inventor： Chun-Chia Chen ,  Chih-Hung Pan ,  Chia-Chi Liu ,  Shun-Fang Liu ,  Meng-Kun Li ,  Chao-An Chen

IPC: H04N5/63 ,  H04N5/44

CPC classification number: H04N5/63 ,  H04N5/44

Abstract: The present invention provides a control method of a receiver. The control method includes the steps of: when the receiver enters a sleep/standby mode, continually detecting an auxiliary signal from an auxiliary channel to generate a detection result; and if the detection result indicates that the auxiliary signal has a preamble or a specific pattern, generating a wake-up control signal to wake up the receiver before successfully receiving the auxiliary signal having a wake-up command.

公开(公告)号：US11838557B2

公开(公告)日：2023-12-05

申请号：US17726713

申请日：2022-04-22

Applicant: MEDIATEK INC.

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

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/186 ,  H04N19/147

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/147 ,  H04N19/186

Abstract: Video encoding methods and apparatuses include receiving reconstructed video samples, determining an initial clipping setting for ALF coefficients, deriving clipping setting candidates from the initial clipping setting. ALF coefficients for the initial clipping setting and the clipping setting candidates are derived by solving inverse matrices, where partial intermediate results of solving ALF coefficients are shared by two or more clipping settings. A distortion value corresponds to the derived ALF coefficients for each clipping setting is computed, and final clipping indices for final ALF coefficients are determined according to the distortion values. ALF filtering is applied to the reconstructed video samples based on the final ALF coefficients and the final clipping indices.

公开(公告)号：US20230199217A1

公开(公告)日：2023-06-22

申请号：US17992797

申请日：2022-11-22

Applicant: MediaTek Inc.

Inventor： Cheng-Yen Chuang ,  Man-Shu Chiang ,  Yu-Ling Hsiao ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/172 ,  H04N19/154 ,  H04N19/52

CPC classification number: H04N19/577 ,  H04N19/176 ,  H04N19/172 ,  H04N19/154 ,  H04N19/52

Abstract: A video encoder receives raw pixel data to be encoded as a current block of a current picture of a video into a bitstream. The video encoder identifies multiple candidate bi-prediction positions for the current block, including a center position, a first set of offset positions, and a second set of offset positions. The first set of offset positions and the second set of offset positions interleave each other. The encoder computes distortion values for each of the candidate bi-prediction positions based on several possible weighting parameter values. The distortion values for the center position are based on each of the several possible weighting parameter values. The distortion values for the first set of offset positions are based on a first subset of the possible weighting parameter values. The distortion values for the second set of offset positions are based on a second subset of the possible weighting parameter values.

公开(公告)号：US11343541B2

公开(公告)日：2022-05-24

申请号：US17051269

申请日：2019-04-29

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/85 ,  H04N19/96 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/117

Abstract: A video coder that implements illumination compensation is provided. The video coder receives a first block of pixels in a first video picture to be coded as a current block, wherein the current block is associated with a motion vector that references a second block of pixels in a second video picture as a reference block. The video coder performs inter-prediction for the current block by using the motion vector to generate a set of motion-compensated pixels for the current block. The video coder modifies the set of motion-compensated pixels of the current block by applying a linear model that is computed based on neighboring samples of the reference block and of the current block. The neighboring samples are identified based on a position of the current block within a larger block.

公开(公告)号：US20210360280A1

公开(公告)日：2021-11-18

申请号：US17386407

申请日：2021-07-27

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi Lin ,  Tzu-Der Chuang ,  Chun-Chia Chen ,  Ching-Yeh Chen ,  Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/583

Abstract: Exemplary video processing methods and apparatuses for coding a current block. One implementation operates by receiving input video data associated with a current block in a current picture; determining one or more Motion Vectors (MVs) for generating an OBMC region; generating one or more converted MVs by changing said one or more MVs to one or more integer MVs or changing a MV component of said one or more MVs to an integer component; deriving the OBMC region by motion compensation using said one or more converted MVs; applying OBMC by blending an OBMC predictor in the OBMC region with an original predictor; and encoding or decoding the current block.