公开(公告)号：US20190026934A1

公开(公告)日：2019-01-24

申请号：US16034601

申请日：2018-07-13

Applicant: MEDIATEK INC.

Inventor： Cheng-Hsuan SHIH ,  Chia-Ying LI ,  Ya-Hsuan LEE ,  Hung-Chih LIN ,  Jian-Liang LIN ,  Shen-Kai CHANG

IPC: G06T15/00

Abstract: Methods and apparatus of processing 360-degree virtual reality images are disclosed. According to one method, a 2D (two-dimensional) frame is divided into multiple blocks. The multiple blocks are encoded or decoded using quantization parameters by restricting a delta quantization parameter to be within a threshold for any two blocks corresponding to two neighboring blocks on a 3D sphere. According to another embodiment, one or more guard bands are added to one or more edges that are discontinuous in the 2D frame but continuous in the 3D sphere. Fade-out process is applied to said one or more guard bands to generate one or more faded guard bands. At the decoder side, the reconstructed 2D frame is generated from the decoded extended 2D frame by cropping said one or more decoded faded guard bands or by blending said one or more decoded faded guard bands and reconstructed duplicated areas.

公开(公告)号：US20170374364A1

公开(公告)日：2017-12-28

申请号：US15628826

申请日：2017-06-21

Applicant: MEDIATEK INC.

Inventor： Jian-Liang LIN ,  Chao-Chih HUANG ,  Hung-Chih LIN ,  Chia-Ying LI ,  Shen-Kai CHANG

IPC: H04N19/119 ,  H04N19/51 ,  H04N19/61 ,  H04N19/85

CPC classification number: H04N19/119 ,  H04N19/103 ,  H04N19/114 ,  H04N19/51 ,  H04N19/597 ,  H04N19/61 ,  H04N19/85

Abstract: A method and apparatus of video encoding or decoding for a video encoding or decoding system applied to multi-face sequences corresponding to a 360-degree virtual reality sequence are disclosed. According to embodiments of the present invention, at least one face sequence of the multi-face sequences is encoded or decoded using face-independent coding, where the face-independent coding encodes or decodes a target face sequence using prediction reference data derived from previous coded data of the target face sequence only. Furthermore, one or more syntax elements can be signaled in a video bitstream at an encoder side or parsed from the video bitstream at a decoder side, where the syntax elements indicate first information associated with a total number of faces in the multi-face sequences, second information associated with a face index for each face-independent coded face sequence, or both the first information and the second information.

公开(公告)号：US20170332079A1

公开(公告)日：2017-11-16

申请号：US15668489

申请日：2017-08-03

Applicant: MEDIATEK, INC.

Inventor： Jian-Liang LIN ,  Fang-Yi Hsieh

IPC: H04N19/132 ,  H04N21/44 ,  H04N19/44 ,  H04N21/4402 ,  H04N19/172

CPC classification number: H04N19/132 ,  H04N19/14 ,  H04N19/172 ,  H04N19/44 ,  H04N21/44004 ,  H04N21/440281 ,  H04N21/4424

Abstract: An exemplary method for processing an input bitstream having a plurality of video frames includes the following steps: deriving an indication data from decoding of a current video frame, and controlling a video decoder to decode or skip a next video frame by referring to at least the indication data and a video decoder capability of the video decoder. A signal processing apparatus for processing an input bitstream including a plurality of video frames includes a video decoder, an indication data estimating unit, and a controller. The video decoder is arranged to decode a current video frame. The indication data estimating unit is for deriving an indication data from decoding of the current video frame. The controller is for controlling the video decoder to decode or skip a next video frame by referring to at least the indication data and a video decoder capability of the video decoder.

公开(公告)号：US20160219261A1

公开(公告)日：2016-07-28

申请号：US14993372

申请日：2016-01-12

Applicant: MediaTek Inc.

Inventor： Yi-Wen CHEN ,  Jian-Liang LIN

IPC: H04N13/00 ,  H04N19/503 ,  H04N19/597 ,  H04N19/105 ,  H04N19/176 ,  H04N19/593

CPC classification number: H04N13/161 ,  H04N13/194 ,  H04N19/11 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/597

Abstract: A method and apparatus for video coding of a block of depth data or texture data using a simple Intra mode is disclosed. The method determines a prediction process selected from a prediction process list for the current block, where the prediction process list comprises at least a single sample mode and at least a simplified Intra prediction mode. If the prediction process selected for the current block corresponds to one single sample mode, encoding or decoding the current block using a single sample value derived from one or more previously decoded pixels for a whole current block. If the prediction process selected for the current block corresponds to one simplified Intra prediction mode, encoding or decoding the current block using Intra prediction signal derived according to a corresponding Intra prediction mode with no residual coding for the current block.

Abstract translation: 公开了一种使用简单的Intra模式对深度数据块或纹理数据块进行视频编码的方法和装置。 该方法确定从当前块的预测处理列表中选择的预测处理，其中预测处理列表至少包括单个采样模式和至少简化的帧内预测模式。 如果为当前块选择的预测过程对应于一个单个样本模式，则使用从整个当前块的一个或多个先前解码的像素导出的单个采样值对当前块进行编码或解码。 如果对于当前块选择的预测过程对应于一个简化的帧内预测模式，则使用根据对应的帧内预测模式导出的帧内预测信号对当前块进行编码或解码，而不对当前块进行残差编码。

公开(公告)号：US20160057453A1

公开(公告)日：2016-02-25

申请号：US14779655

申请日：2014-07-18

Applicant: MEDIATEK INC.

Inventor： Yu-Lin CHANG ,  Yi-Wen CHEN ,  Jian-Liang LIN

IPC: H04N19/597 ,  H04N19/513 ,  H04N19/187 ,  H04N19/30 ,  H04N19/176

Abstract: A method of three-dimensional video encoding and decoding that adaptively incorporates camera parameters in the video bitstream according to a control flag is disclosed. The control flag is derived based on a combination of individual control flags associated with multiple depth-oriented coding tools. Another control flag can be incorporated in the video bitstream to indicate whether there is a need for the camera parameters for the current layer. In another embodiment, a first flag and a second flag are used to adaptively control the presence and location of camera parameters for each layer or each view in the video bitstream. The first flag indicates whether camera parameters for each layer or view are present in the video bitstream. The second flag indicates camera parameter location for each layer or view in the video bitstream.

Abstract translation: 公开了一种根据控制标志自适应地将视频比特流中的摄像机参数并入的三维视频编码和解码方法。 基于与多个面向深度的编码工具相关联的单独控制标志的组合来导出控制标志。 可以将另一个控制标志并入视频位流中，以指示是否需要当前层的摄像机参数。 在另一个实施例中，使用第一标志和第二标志来自适应地控制视频比特流中的每个层或每个视图的相机参数的存在和位置。 第一个标志指示每个图层或视图的相机参数是否存在于视频比特流中。 第二个标志表示视频比特流中每一层或视图的相机参数位置。

公开(公告)号：US20150382020A1

公开(公告)日：2015-12-31

申请号：US14767459

申请日：2014-06-11

Applicant: MEDIATEK INC.

Inventor： Yi-Wen CHEN ,  Jian-Liang LIN

IPC: H04N19/597 ,  H04N19/51 ,  H04N19/00

CPC classification number: H04N19/597 ,  H04N19/00 ,  H04N19/433 ,  H04N19/51 ,  H04N19/513 ,  H04N19/573

Abstract: A method and apparatus for 3D coding to support fast bi-prediction having identical motion in the advanced residual prediction (ARP) are disclosed. Embodiment of the present invention use one or more aligned operations including data clipping and reference picture selection associated with motion vector derivation during residual predictor generation. When ARP mode is enabled, the residual prediction process for uni-prediction and bi-prediction perform same data clipping process and same reference picture selection process effectively. A single clipping operation or two clipping operations can be performed for both uni-prediction and bi-prediction.

Abstract translation: 公开了一种用于3D编码以支持在高级剩余预测（ARP）中具有相同运动的快速双预测的方法和装置。 本发明的实施例使用一个或多个对准的操作，包括在剩余预测器生成期间与运动矢量导出相关联的数据剪辑和参考图像选择。 当启用ARP模式时，用于单一预测和双重预测的残差预测过程有效地执行相同的数据剪辑处理和相同的参考图片选择处理。 可以对单一预测和双预测执行单个削波操作或两个削波操作。

公开(公告)号：US20150358600A1

公开(公告)日：2015-12-10

申请号：US14762881

申请日：2014-03-20

Applicant: MEDIATEK INC.

Inventor： Jian-Liang LIN ,  Yi-Wen CHEN

IPC: H04N13/00 ,  H04N19/51 ,  H04N19/176 ,  H04N19/597 ,  H04N19/96

CPC classification number: H04N13/161 ,  H04N19/176 ,  H04N19/51 ,  H04N19/597 ,  H04N19/61 ,  H04N19/96

Abstract: A method and apparatus of three-dimensional/multi-view coding using a candidate list including a second inter-view candidate in the candidate list for Merge mode, Skip mode or AMVP based (Advanced Motion Vector Prediction based) Inter mode are disclosed. The second inter-view candidate can be derived based on already coded or decoded texture data for the candidate list to include. For example, the second inter-view candidate can be determined from the motion information associated with a corresponding block in a reference view, where the corresponding block is located according to the location of the right-bottom neighboring block and a selected disparity vector. The right-bottom neighboring block is located across from a right-bottom corner of the current texture block. The second inter-view candidate can be inserted into the candidate list only when the number of previous available candidates is smaller than a pre-specified number.

Abstract translation: 公开了使用候选列表中包含合并模式，跳过模式或基于AMVP（基于高级运动矢量预测）模式的候选列表中的候选列表的三维/多视图编码的方法和装置。 可以基于已经编码或解码的候选列表的纹理数据来导出第二视角间候选。 例如，可以根据参考视图中与相应块相关联的运动信息来确定第二视角间候选，其中相应块根据右下相邻块的位置和选择的视差矢量而定位。 右下相邻块位于当前纹理块的右下角的两边。 仅当先前可用候选的数量小于预定数量时，才能将第二视频间候选者插入到候选列表中。

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：US20200260102A1

公开(公告)日：2020-08-13

申请号：US15776154

申请日：2016-11-08

Applicant: MEDIATEK INC.

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

IPC: H04N19/517 ,  H04N19/105 ,  H04N19/159 ,  H04N19/70 ,  H04N19/46 ,  H04N19/176

Abstract: A method and apparatus of priority-based MVP (motion vector predictor) derivation for motion compensation in a video encoder or decoder are disclosed. According to this method, one or more final motion vector predictors (MVPs) are derived using priority-based MVP derivation process. The one or more final MVPs are derived by selecting one or more firstly available MVs from a priority-based MVP list for Inter prediction mode, Skip mode or Merge mode based on reference data of one or two target reference pictures that are reconstructed prior to the current block according to a priority order. Therefore, there is no need for transmitting information at the encoder side nor deriving information at the decoder side that is related to one or more MVP indices to identify the one or more final MVPs in the video bitstream.

公开(公告)号：US20190246105A1

公开(公告)日：2019-08-08

申请号：US16386356

申请日：2019-04-17

Applicant: MEDIATEK INC.

Inventor： Hung-Chih LIN ,  Jian-Liang LIN ,  Chia-Ying LI ,  Chao-Chih HUANG ,  Shen-Kai CHANG

IPC: H04N19/117 ,  H04N19/46 ,  H04N19/597 ,  H04N5/232 ,  H04N19/82 ,  H04N19/70 ,  H04N19/463 ,  H04N19/196 ,  H04N19/172 ,  H04N19/167 ,  H04N5/225

CPC classification number: H04N19/117 ,  H04N5/2252 ,  H04N5/2258 ,  H04N5/23238 ,  H04N19/167 ,  H04N19/172 ,  H04N19/196 ,  H04N19/46 ,  H04N19/463 ,  H04N19/597 ,  H04N19/70 ,  H04N19/82

Abstract: Methods and apparatus of processing cube face images are disclosed. According to embodiments of the present invention, one or more discontinuous boundaries within each assembled cubic frame are determined and used for selective filtering, where the filtering process is skipped at said one or more discontinuous boundaries within each assembled cubic frame when the filtering process is enabled. Furthermore, the filtering process is applied to one or more continuous areas in each assembled cubic frame.