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：US20170200255A1

公开(公告)日：2017-07-13

申请号：US15390954

申请日：2016-12-27

Applicant: MEDIATEK INC.

Inventor： Hung-Chih LIN ,  Shen-Kai CHANG

IPC: G06T3/00 ,  H04N19/186 ,  H04N19/179 ,  H04N19/70 ,  G06T7/90 ,  H04N5/232

CPC classification number: G06T3/0037 ,  G06T3/4038 ,  G06T7/90 ,  G06T2207/10016 ,  G06T2207/10024 ,  H04N5/23238 ,  H04N19/179 ,  H04N19/186 ,  H04N19/70

Abstract: Methods and apparatus of processing cube face images are disclosed. According one method, each set of six cubic faces is converted into one rectangular assembled image by assembling each set of six cubic faces to maximize a number of continuous boundaries and to minimize a number of discontinuous boundaries. Each continuous boundary corresponds to one boundary between two connected faces with continuous contents from one face to another face. Each discontinuous boundary corresponds to one boundary between two connected faces with discontinuous contents from one face to another face. The method may further comprise applying video coding to the video sequence outputting the compressed data of the video sequence. According to another method, a fully-connected cubic-face image representing an unfolded image from the six faces of the cube is generated and the blank areas are filled with padding data to form a rectangular assembled image.

公开(公告)号：US20190220951A1

公开(公告)日：2019-07-18

申请号：US16359028

申请日：2019-03-20

Applicant: MEDIATEK INC.

Inventor： Hung-Chih LIN ,  Shen-Kai CHANG

IPC: G06T3/00 ,  G06T3/40 ,  H04N5/232 ,  H04N19/186 ,  H04N19/179 ,  G06T7/90 ,  H04N19/70

CPC classification number: G06T3/0037 ,  G06T3/4038 ,  G06T7/90 ,  G06T2207/10016 ,  G06T2207/10024 ,  H04N5/23238 ,  H04N19/179 ,  H04N19/186 ,  H04N19/70

Abstract: Methods and apparatus of processing cube face images are disclosed. According one method, each set of six cubic faces is converted into one rectangular assembled image by assembling each set of six cubic faces to maximize a number of continuous boundaries and to minimize a number of discontinuous boundaries. Each continuous boundary corresponds to one boundary between two connected faces with continuous contents from one face to another face. Each discontinuous boundary corresponds to one boundary between two connected faces with discontinuous contents from one face to another face. The method may further comprise applying video coding to the video sequence outputting the compressed data of the video sequence. According to another method, a fully-connected cubic-face image representing an unfolded image from the six faces of the cube is generated and the blank areas are filled with padding data to form a rectangular assembled image.

公开(公告)号：US20170353737A1

公开(公告)日：2017-12-07

申请号：US15614754

申请日：2017-06-06

Applicant: MEDIATEK INC.

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

IPC: H04N19/597 ,  H04N19/172 ,  H04N19/426 ,  H04N19/88

CPC classification number: H04N19/597 ,  H04N19/172 ,  H04N19/426 ,  H04N19/563 ,  H04N19/85 ,  H04N19/88

Abstract: A method and apparatus or video coding or processing for an image sequence corresponding to virtual reality (VR) video are disclosed. According to embodiments of the present invention, a padded area outside one cubic face frame boundary of one cubic face frame is padded to form a padded cubic face frame using one or more extended cubic faces, where at least one boundary cubic face in said one cubic face frame has one padded area using pixel data derived from one extended cubic face in a same cubic face frame.

公开(公告)号：US20170230668A1

公开(公告)日：2017-08-10

申请号：US15418931

申请日：2017-01-30

Applicant: MEDIATEK INC.

Inventor： Hung-Chih LIN ,  Shen-Kai CHANG

IPC: H04N19/159 ,  H04N19/174 ,  H04N19/513 ,  H04N19/184 ,  H04N19/176

CPC classification number: H04N19/563 ,  H04N19/597 ,  H04N19/85

Abstract: Method and apparatus of video coding for a spherical frame sequence or a cubic frame sequence in a video encoder or decoder are disclosed. According to one method, surrounding blocks for a current block are identified and any surrounding block outside a vertical spherical frame boundary or outside a cubic face boundary of a current cubic face is mapped to a remapped surrounding block. One or more available remapped surrounding blocks for the current block are determined. Mode information reference is generated using mode information associated with said one or more available remapped surrounding blocks. The mode information associated with the current block is then used for encoding or decoding the mode information of the current block. In another method, Intra prediction pixels are determined from the available remapped surrounding blocks. The Intra prediction pixels are used for Intra prediction encoding or decoding of the current block.