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：US11004173B2

公开(公告)日：2021-05-11

申请号：US16143410

申请日：2018-09-26

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Peng Wang ,  Lin Liu ,  Ya-Hsuan Lee ,  Hung-Chih Lin ,  Shen-Kai Chang

IPC: H04N19/182 ,  H04N19/59 ,  G06T11/00 ,  G06T3/00 ,  G06T19/00 ,  H04N19/597 ,  H04N19/55 ,  H04N19/86

Abstract: A video processing method includes: obtaining a plurality of projection faces from an omnidirectional content of a sphere, wherein the omnidirectional content of the sphere is mapped onto the projection faces via cubemap projection, and the projection faces comprise a first projection face; obtaining, by a re-sampling circuit, a first re-sampled projection face by re-sampling at least a portion of the first projection face through non-uniform mapping; generating a projection-based frame according to a projection layout of the cubemap projection, wherein the projection-based frame comprises the first re-sampled projection face packed in the projection layout; and encoding the projection-based frame to generate a part of a bitstream.

公开(公告)号：US10827159B2

公开(公告)日：2020-11-03

申请号：US16105147

申请日：2018-08-20

Applicant: MEDIATEK INC.

Inventor： Peng Wang ,  Hung-Chih Lin ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: H04N13/178 ,  H04N19/597 ,  H04N13/139 ,  H04N5/232 ,  H04N19/70

Abstract: According to one method, at a source side or an encoder side, a selected viewport associated with the 360-degree virtual reality images is determined. One or more parameters related to the selected pyramid projection format are then determined. According to the present invention, one or more syntax elements for said one or more parameters are included in coded data of the 360-degree virtual reality images. The coded data of the 360-degree virtual reality images are provided as output data. At a receiver side or a decoder side, one or more syntax elements for one or more parameters are parsed from the coded data of the 360-degree virtual reality images. A selected pyramid projection format associated with the 360-degree virtual reality images is determined based on information including said one or more parameters. The 360-degree virtual reality images are then recovered according to the selected viewport.

公开(公告)号：US10593012B2

公开(公告)日：2020-03-17

申请号：US15927028

申请日：2018-03-20

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Hung-Chih Lin ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/00

Abstract: A video processing method includes receiving an omnidirectional content corresponding to a sphere, generating a projection-based frame according to at least the omnidirectional content and a segmented sphere projection (SSP) format, and encoding, by a video encoder, the projection-based frame to generate a part of a bitstream. The projection-based frame has a 360-degree content represented by a first circular projection face, a second circular projection face, and at least one rectangular projection face packed in an SSP layout. A north polar region of the sphere is mapped onto the first circular projection face. A south polar region of the sphere is mapped onto the second circular projection face. At least one non-polar ring-shaped segment between the north polar region and the south polar region of the sphere is mapped onto said at least one rectangular projection face.

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.

公开(公告)号：US20190251660A1

公开(公告)日：2019-08-15

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: G06T3/40 ,  H04N19/00 ,  G06T9/00 ,  H04N19/85 ,  G06T19/00 ,  H04N19/597 ,  G06T15/10 ,  H04N19/70

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：US20190088001A1

公开(公告)日：2019-03-21

申请号：US15769750

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 ,  Chao-Chih Huang ,  Hui Ouyang

IPC: G06T15/04 ,  G06T3/00 ,  G06T15/08

Abstract: A projection-based frame is generated according to an omnidirectional video frame and an octahedron projection layout. The projection-based frame has a 360-degree image content represented by triangular projection faces assembled in the octahedron projection layout. A 360-degree image content of a viewing sphere is mapped onto the triangular projection faces via an octahedron projection of the viewing sphere. One side of a first triangular projection face has contact with one side of a second triangular projection face, one side of a third triangular projection face has contact with another side of the second triangular projection face. One image content continuity boundary exists between one side of the first triangular projection face and one side of the second triangular projection face, and another image content continuity boundary exists between one side of the third triangular projection face and another side of the second triangular projection face.

公开(公告)号：US10211646B2

公开(公告)日：2019-02-19

申请号：US15889136

申请日：2018-02-05

Applicant: MediaTek Inc.

Inventor： Hung-Chih Lin ,  Yen-Hsun Hsu ,  Hao-Ping Hong

IPC: H02J5/00 ,  H02J50/10 ,  H02J50/12 ,  H01F38/14

Abstract: A resonator circuit includes: a first inductive element and a second inductive element that is connected to the first inductive element in series; a first capacitive element, connected to a first end of the first inductive element and a first output end of the resonator circuit; and a set of second capacitive elements connected in series, the set of second capacitive elements having one end connected between the first and second inductive elements and having another end connected between the second inductive element and a second output end of the resonator circuit. The intermediate end of the set of second capacitive elements is used as a third output end of the resonator circuit.

公开(公告)号：US20180192024A1

公开(公告)日：2018-07-05

申请号：US15860671

申请日：2018-01-03

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Peng Wang ,  Hung-Chih Lin ,  Shen-Kai Chang

IPC: H04N13/00 ,  G06T3/00

CPC classification number: H04N13/161 ,  G06T3/0087 ,  H04N13/139 ,  H04N19/00 ,  H04N19/59 ,  H04N19/597

Abstract: A video processing method includes receiving an omnidirectional content corresponding to a sphere, generating a projection-based frame according to the omnidirectional content and a pyramid projection layout, and encoding, by a video encoder, the projection-based frame to generate a part of a bitstream. The projection-based frame has a 360-degree content represented by a base projection face and a plurality of lateral projection faces packed in the pyramid projection layout. The base projection face and the lateral projection faces are obtained according to at least projection relationship between a pyramid and the sphere.

公开(公告)号：US09923384B2

公开(公告)日：2018-03-20

申请号：US14715570

申请日：2015-05-18

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Hao-Ping Hong

IPC: H02J5/00 ,  H02J50/10 ,  H02J50/12 ,  H02J7/02

CPC classification number: H02J5/005 ,  H02J7/025 ,  H02J50/10 ,  H02J50/12 ,  H02J50/60

Abstract: A method for performing efficiency optimization of an electronic device and an associated apparatus are provided, where the method includes the steps of: performing at least one detection operation according to at least one signal of the electronic device to generate at least one detection result; and selecting a rectifier size of a plurality of rectifier sizes of a configurable rectifier within the electronic device according to the at least one detection result, to control the configurable rectifier to operate with the rectifier size, wherein the configurable rectifier is arranged for performing rectification operations, and the configurable rectifier is configurable to operate with at least one portion of the configurable rectifier being activated.