公开(公告)号：US10397569B2

公开(公告)日：2019-08-27

申请号：US15611850

申请日：2017-06-02

Applicant: MEDIATEK INC.

Inventor： Shan Liu ,  Jing Ye ,  Xiaozhong Xu ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N19/00 ,  H04N19/11 ,  H04N19/156 ,  H04N19/176 ,  H04N19/593 ,  H04N19/82 ,  H04N19/147 ,  H04N19/463

Abstract: A method and apparatus for video coding using template-based Intra prediction are disclosed. According to one method, the template-based Intra prediction searches N template matching candidates to reduce the complexity. In another method, the template-based Intra prediction assigns different weights for different pixel locations of template or uses different pixel precision for interpolation filter during cost evaluation among template matching candidates. In yet another method, truncated template size is used to reduce the complexity. In yet another method, the left and top templates may have different sizes for non-square block. In yet another method, inverse templated-based Intra prediction is used.

公开(公告)号：US10390021B2

公开(公告)日：2019-08-20

申请号：US15458446

申请日：2017-03-14

Applicant: MEDIATEK INC.

Inventor： Xiaozhong Xu ,  Shan Liu

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186

Abstract: Aspects of the disclosure include a method for video coding. The method includes receiving input data associated with a current block in an image frame, selecting a reference pixel set from a plurality of candidate neighboring pixel sets adjacent to an edge of the current block, generating an intra predictor of the current block based on the selected reference pixel set and an intra prediction mode of the current block, and encoding or decoding the current block based on the intra predictor to output encoded video data or a decoded block. Each set of the candidate neighboring pixel sets is arranged in parallel with the edge of the current block.

公开(公告)号：US20180199042A1

公开(公告)日：2018-07-12

申请号：US15861503

申请日：2018-01-03

Applicant: MediaTek Inc.

Inventor： Xin Wang ,  Wang Lin Lai ,  Lulin Chen ,  Shan Liu

IPC: H04N19/167 ,  H04N19/172

Abstract: The techniques described herein relate to methods, apparatus, and computer readable media configured to encode or decode a region of interest associated with video data. A spherical region structure is associated with the video data that specifies the region of interest on a sphere, the spherical region structure including a reference point of the region of interest on the sphere, and data indicative of a set of side points, comprising a side point for each side of the region of interest on the sphere. The region of interest in the video data is determined based on the reference point and the set of side points. The video data can be composite video data. The spherical region structure, and/or metadata based on the spherical region structure, can be implicitly or explicitly associated with the video data.

公开(公告)号：US20180048877A1

公开(公告)日：2018-02-15

申请号：US15663932

申请日：2017-07-31

Applicant: MEDIATEK INC.

Inventor： Wang Lin Lai ,  Shan Liu

IPC: H04N13/00

CPC classification number: H04N13/178 ,  H04N13/111 ,  H04N21/816 ,  H04N21/85406

Abstract: Aspects of the disclosure provide an apparatus that includes an interface circuit, a processing circuit, and a display device. The interface circuit is configured to receive media data with video content being structured into one or more tracks corresponding to one or more spatial partitions. The media data includes a correspondence of the one or more tracks to the one or more spatial partitions. The processing circuit is configured to extract the correspondence of the one or more tracks to the one or more spatial partitions, select, from the one or more tracks, one or more covering tracks with spatial partitions covering a region of interest based on the correspondence, and generate images of the region of interest based on the one or more covering tracks. The display device is configured to display the images of the region of interest.

公开(公告)号：US20180020202A1

公开(公告)日：2018-01-18

申请号：US15647630

申请日：2017-07-12

Applicant: MediaTek Inc.

Inventor： Xiaozhong Xu ,  Shan Liu

IPC: H04N13/00 ,  H04N19/46 ,  H04N19/167 ,  H04N19/86 ,  H04N19/117

CPC classification number: H04N13/106 ,  G06T3/0025 ,  H04N13/161 ,  H04N19/117 ,  H04N19/136 ,  H04N19/167 ,  H04N19/182 ,  H04N19/423 ,  H04N19/46 ,  H04N19/86

Abstract: A video system for encoding or decoding 360-degree virtual reality (360VR) video is provided. The system performs filtering operations to reduce coding artifacts and discontinuities in a projection image of an omnidirectional image. The video system identifies first and second edges of the projection image. The first and second edges are physically correlated as a common edge in the omnidirectional image but not physically connected in the projection image. The system computes a set of filtered pixels based on a first set of pixels near the first edge and a second set of pixels near the second edge.

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：US11089323B2

公开(公告)日：2021-08-10

申请号：US16301772

申请日：2017-05-26

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Chen Sun ,  Yu-Wen Huang ,  Shan Liu ,  Xiaozhong Xu

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/119 ,  H04N19/186 ,  H04N19/513 ,  H04N19/70 ,  H04N19/00 ,  H04N19/159 ,  H04N19/96 ,  H04N19/436

Abstract: A method and apparatus for a video coding system with the current picture referencing (CPR) mode enabled are disclosed. According to one method, the luma and chroma blocks of the current image are jointly coded using a same coding unit (CU) structure if the CPR mode is selected for the luma and the chroma blocks. Alternatively, if the luma and chroma components are partitioned into the luma and the chroma blocks separately using separate CU structures, the luma and chroma blocks are encoded or decoded using a coding mode selected from a coding mode group excluding the CPR mode. According to another method, the luma and chroma blocks of the current image are coded separately using a different CU structure if the CPR mode is selected for the luma and chroma blocks. In yet another method, reconstructed reference data is disclosed for the CPR mode with CU equal to PU.

公开(公告)号：US11082713B2

公开(公告)日：2021-08-03

申请号：US15776170

申请日：2016-11-18

Applicant: MEDIATEK INC.

Inventor： Shan Liu ,  Xiaozhong Xu

IPC: H04N19/527 ,  H04N19/70

Abstract: A method and apparatus of Inter prediction for video coding performed in a video encoder or a video decoder are disclosed. In one method, a GMC (global motion compensation) indication indicating whether global motion compensation is enabled is signalled at the video encoder side or parsed from the video bitstream at the video decoder side. The current processing unit is encoded or decoded using one or more coding modes including a GMC mode if the GMC indication is indicates GMC is enabled. According to another method, if a GMC mode is enabled for a region, a number representing the total number of multiple global motion models allowed is determined for encoding or decoding the processing units in the region using multiple global motion models. In yet another method the GMC and local motion compensation are applied selectively or in a combined fashion.

公开(公告)号：US11032550B2

公开(公告)日：2021-06-08

申请号：US15440085

申请日：2017-02-23

Applicant: MEDIATEK INC.

Inventor： Jing Ye ,  Shan Liu ,  Shaw-Min Lei

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513

Abstract: In one example, a method for video coding includes receiving input data associated with a current block in an image frame, generating an inter predictor of the current block, and generating an intra predictor of the current block based on samples of neighboring pixels and an intra prediction mode that locates the samples of neighboring pixels. The method further includes generating a final predictor of the current block by combining the inter predictor and the intra predictor according to one or more intra weight coefficients associated with the intra prediction mode, and encoding or decoding the current block based on the final predictor to output encoded video data or a decoded block. The one or more intra weight coefficients indicate one or more ratios that corresponding one or more portions of the intra predictor are combined with the inter predictor, respectively.

公开(公告)号：US10856009B2

公开(公告)日：2020-12-01

申请号：US15514926

申请日：2015-10-08

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Xiaozhong Xu ,  Yu-Chen Sun ,  Shih-Ta Hsiang ,  Shan Liu

IPC: H04N19/593 ,  H04N19/513 ,  H04N19/52

Abstract: A method of video coding using coding modes including IntraBC mode (Intra-block copy mode) for a picture is disclosed. The system determines whether the current reference block is located above a current coding unit (CU) containing the current prediction unit (PU) in a vertical direction and whether the current reference block is located on a left side of the current CU in a horizontal direction based on the original block vector (BV). If both results are not true, the original BV is clipped to a clipped BV so that a relocated reference block corresponding to the clipped BV is above the current CU in the vertical direction or to the left side of the current CU in the horizontal direction. The clipped BV is used as a predictor for encoding or decoding of a current BV or used for IntraBC encoding or decoding of the current PU.