公开(公告)号：US20190325553A1

公开(公告)日：2019-10-24

申请号：US16460958

申请日：2019-07-02

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Hui Ou Yang ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/00 ,  G02B27/01 ,  G06T1/00 ,  G06T19/00

Abstract: A video processing method includes receiving a bitstream, and decoding, by a video decoder, the bitstream to generate a decoded frame. The decoded frame is a projection-based frame that has a 360-degree image/video content represented by triangular projection faces packed in an octahedron projection layout. An omnidirectional image/video content of a viewing sphere is mapped onto the triangular projection faces via an octahedron projection of the viewing sphere. An equator of the viewing sphere is not mapped along any side of each of the triangular projection faces.

公开(公告)号：US10380715B2

公开(公告)日：2019-08-13

申请号：US15825081

申请日：2017-11-28

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Hui Ou Yang ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/00 ,  G06T3/60 ,  G06T19/00 ,  G06T1/00 ,  G02B27/01

Abstract: A video processing method includes: receiving an omnidirectional image/video content corresponding to a viewing sphere, generating a sequence of projection-based frames according to the omnidirectional image/video content and an octahedron projection layout, and encoding, by a video encoder, the sequence of projection-based frames to generate a bitstream. Each projection-based frame has a 360-degree image/video content represented by triangular projection faces packed in the octahedron projection layout. The omnidirectional image/video content of the viewing sphere is mapped onto the triangular projection faces via an octahedron projection of the viewing sphere. An equator of the viewing sphere is not mapped along any side of each of the triangular projection faces.

公开(公告)号：US10963987B2

公开(公告)日：2021-03-30

申请号：US16830288

申请日：2020-03-26

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Hui Ou Yang ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/00 ,  G06T3/60 ,  G06T19/00 ,  G06T1/00 ,  G02B27/01

Abstract: A video processing method includes receiving a bitstream, and decoding, by a video decoder, the bitstream to generate a decoded frame. The decoded frame is a projection-based frame that has a 360-degree image/video content represented by triangular projection faces packed in a triangle-based projection layout. An omnidirectional image/video content of a viewing sphere is mapped onto the triangular projection faces via a triangle-based projection of the viewing sphere. An equator of the viewing sphere is not mapped along any side of each of the triangular projection faces.

公开(公告)号：US10587857B2

公开(公告)日：2020-03-10

申请号：US16392644

申请日：2019-04-24

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: H04N13/117 ,  G06T15/10 ,  H04N19/597 ,  H04N5/232 ,  H04N5/341 ,  H04N13/111 ,  G06T19/00 ,  H04N19/70 ,  H04N19/85 ,  H04N13/00 ,  H04N19/00 ,  G06T9/00 ,  G06T3/40

Abstract: A video processing method includes receiving a bitstream, processing the bitstream to obtain at least one syntax element from the bitstream, and decoding the bitstream to generate a current decoded frame having a rotated 360-degree image/video content represented in a 360-degree Virtual Reality (360 VR) projection format. The at least one syntax element signaled via the bitstream indicates rotation information of content-oriented rotation that is involved in generating the rotated 360-degree image/video content, and includes a first syntax element. When the content-oriented rotation is enabled, the first syntax element indicates a rotation degree along a specific rotation axis.

公开(公告)号：US10560678B2

公开(公告)日：2020-02-11

申请号：US15802481

申请日：2017-11-03

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: H04N13/117 ,  G06T15/10 ,  H04N19/597 ,  H04N5/232 ,  H04N5/341 ,  H04N13/111 ,  G06T19/00 ,  H04N13/00 ,  H04N19/00 ,  G06T9/00 ,  H04N19/70 ,  H04N19/85 ,  G06T3/40

Abstract: A video processing method includes: receiving a current input frame having a 360-degree image/video content represented in a 360-degree Virtual Reality (360 VR) projection format, applying content-oriented rotation to the 360-degree image/video content in the current input frame to generate a content-rotated frame having a rotated 360-degree image/video content represented in the 360 VR projection format, encoding the content-rotated frame to generate a bitstream, and signaling at least one syntax element via the bitstream, wherein the at least one syntax element is set to indicate rotation information of the content-oriented rotation.

公开(公告)号：US20180158170A1

公开(公告)日：2018-06-07

申请号：US15825081

申请日：2017-11-28

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Hui Ou Yang ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/00 ,  G06T19/00 ,  G02B27/01 ,  G06T1/00

CPC classification number: G06T3/0062 ,  G02B27/017 ,  G06T1/0007 ,  G06T3/60 ,  G06T19/006 ,  G06T2207/10016

Abstract: A video processing method includes: receiving an omnidirectional image/video content corresponding to a viewing sphere, generating a sequence of projection-based frames according to the omnidirectional image/video content and an octahedron projection layout, and encoding, by a video encoder, the sequence of projection-based frames to generate a bitstream. Each projection-based frame has a 360-degree image/video content represented by triangular projection faces packed in the octahedron projection layout. The omnidirectional image/video content of the viewing sphere is mapped onto the triangular projection faces via an octahedron projection of the viewing sphere. An equator of the viewing sphere is not mapped along any side of each of the triangular projection faces.

公开(公告)号：US20180130175A1

公开(公告)日：2018-05-10

申请号：US15802481

申请日：2017-11-03

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/40 ,  G06T19/00

Abstract: A video processing method includes: receiving a current input frame having a 360-degree image/video content represented in a 360-degree Virtual Reality (360 VR) projection format, applying content-oriented rotation to the 360-degree image/video content in the current input frame to generate a content-rotated frame having a rotated 360-degree image/video content represented in the 360 VR projection format, encoding the content-rotated frame to generate a bitstream, and signaling at least one syntax element via the bitstream, wherein the at least one syntax element is set to indicate rotation information of the content-oriented rotation.

公开(公告)号：US20250071289A1

公开(公告)日：2025-02-27

申请号：US18811785

申请日：2024-08-22

Applicant: MEDIATEK INC.

Inventor： Shou-Ming Chen ,  Yu-Cheng Chu ,  Chia-Ying Li

IPC: H04N19/136 ,  G06T5/92 ,  H04N9/64 ,  H04N19/186 ,  H04N19/70

Abstract: An image encoder includes a tone mapper, an enhancement layer and an image file generator. The tone mapper is used to generate a base image according to an enhanced image and red green blue (RGB) gains. The RGB gains are set close to or the same as each other. The enhancement layer is used to generate a tone curve and/or a gain map of the base image and the enhanced image according to the tone mapper and/or a group including the base image and the enhanced image. The image file generator is used to generate an image file according to the base image and at least one member of a group including the tone curve and the gain map.

公开(公告)号：US11049314B2

公开(公告)日：2021-06-29

申请号：US16802821

申请日：2020-02-27

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 ,  H04N19/124 ,  H04N19/86 ,  H04N19/176 ,  H04N19/154 ,  G06T19/00 ,  H04N19/597

Abstract: Methods and apparatus of processing 360-degree virtual reality images are disclosed. According to one method, the method receives coded data for an extended 2D (two-dimensional) frame including an encoded 2D frame with one or more encoded guard bands, wherein the encoded 2D frame is projected from a 3D (three-dimensional) sphere using a target projection, wherein said one or more encoded guard bands are based on a blending of one or more guard bands with an overlapped region when the overlapped region exists. The method then decodes the coded data into a decoded extended 2D frame including a decoded 2D frame with one or more decoded guard bands, and derives a reconstructed 2D frame from the decoded extended 2D frame.

公开(公告)号：US10462484B2

公开(公告)日：2019-10-29

申请号：US15772818

申请日：2017-09-30

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Hung-Chih Lin ,  Chia-Ying Li ,  Shen-Kai Chang ,  Chi-Cheng Ju

IPC: H04N19/597 ,  H04N19/184 ,  H04N19/91 ,  H04N19/70 ,  G06K9/36

Abstract: A video encoding method includes: setting a 360-degree Virtual Reality (360 VR) projection layout of projection faces, wherein the projection faces have a plurality of triangular projection faces located at a plurality of positions in the 360 VR projection layout, respectively; encoding a frame having a 360-degree image content represented by the projection faces arranged in the 360 VR projection layout to generate a bitstream; and for each position included in at least a portion of the positions, signaling at least one syntax element via the bitstream, wherein the at least one syntax element is set to indicate at least one of an index of a triangular projection view filled into a corresponding triangular projection face located at the position and a rotation angle of content rotation applied to the triangular projection view filled into the corresponding triangular projection face located at the position.