公开(公告)号：US11095912B2

公开(公告)日：2021-08-17

申请号：US17075724

申请日：2020-10-21

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/00 ,  H04N19/44 ,  H04N19/169 ,  H04N19/186 ,  H04N19/132

Abstract: A video decoding method includes decoding a part of a bitstream to generate a decoded frame. The decoded frame is a projection-based frame that comprises at least one projection face and at least one guard band packed in a projection layout. At least a portion of a 360-degree content of a sphere is mapped to the at least one projection face via projection. The decoded frame is in a 4:2:0 chroma format or a 4:2:2 chroma format, and a guard band size of each of the at least one guard band is equal to an even number of luma samples.

公开(公告)号：US11069026B2

公开(公告)日：2021-07-20

申请号：US16286622

申请日：2019-02-27

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00 ,  G06T7/13 ,  G06T3/40

Abstract: A video processing method includes: obtaining a plurality of square projection faces from an omnidirectional content of a sphere according to a cube-based projection, scaling the square projection faces to generate a plurality of scaled projection faces, respectively, creating at least one padding region, generating a projection-based frame by packing the scaled projection faces and said at least one padding region in a projection layout of the cube-based projection, and encoding the projection-based frame to generate a part of a bitstream.

公开(公告)号：US10922783B2

公开(公告)日：2021-02-16

申请号：US16285215

申请日：2019-02-26

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00

Abstract: A cube-based projection method includes generating pixels of different square projection faces associated with a cube-based projection of a 360-degree image content of a sphere. Pixels of a first square projection face are generated by utilizing a first mapping function set. Pixels of a second square projection face are generated by utilizing a second mapping function set. The different square projection faces include the first square projection face and the second square projection face. The second mapping function set is not identical to the first mapping function set.

公开(公告)号：US10573076B2

公开(公告)日：2020-02-25

申请号：US15839799

申请日：2017-12-12

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chia-Ying Li ,  Le Shi ,  Ya-Hsuan Lee ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T19/00 ,  G06T3/00 ,  G06T15/20 ,  G06T9/00 ,  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 a viewport-based cube projection layout, and encoding the sequence of projection-based frames to generate a bitstream. Each projection-based frame has a 360-degree image/video content represented by rectangular projection faces packed in the viewport-based cube projection layout. The rectangular projection faces include a first rectangular projection face, a second rectangular projection face, a third rectangular projection face, a fourth rectangular projection face, a fifth rectangular projection face, and a sixth rectangular projection face split into partial rectangular projection faces. The first rectangular projection face corresponds to user's viewport, and is enclosed by a surrounding area composed of the second rectangular projection face, the third rectangular projection face, the fourth rectangular projection face, the fifth rectangular projection face, and the partial rectangular projection faces.

公开(公告)号：US20180276788A1

公开(公告)日：2018-09-27

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：US20180262775A1

公开(公告)日：2018-09-13

申请号：US15917844

申请日：2018-03-12

Applicant: MEDIATEK INC.

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

IPC: H04N19/597 ,  H04N5/232 ,  H04N19/59 ,  H04N19/86

CPC classification number: H04N19/597 ,  H04N5/23238 ,  H04N19/563 ,  H04N19/59 ,  H04N19/86

Abstract: A video processing method includes: receiving an omnidirectional content corresponding to a sphere, obtaining projection faces from the omnidirectional content, and creating a projection-based frame by generating at least one padding region and packing the projection faces and said at least one padding region in a 360 VR projection layout. The projection faces packed in the 360 VR projection layout include a first projection face and a second projection face, where there is an image content discontinuity edge between the first projection face and the second projection face if the first projection face connects with the second projection face. The at least one padding region packed in the 360 VR projection layout includes a first padding region, where the first padding region connects with the first projection face and the second projection face for isolating the first projection face from the second projection face in the 360 VR projection layout.

公开(公告)号：US20180165886A1

公开(公告)日：2018-06-14

申请号：US15839799

申请日：2017-12-12

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chia-Ying Li ,  Le Shi ,  Ya-Hsuan Lee ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T19/00 ,  G06T15/20 ,  G06T3/00

CPC classification number: G06T19/006 ,  G02B27/017 ,  G06T3/005 ,  G06T9/00 ,  G06T15/205 ,  G06T19/00

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 a viewport-based cube projection layout, and encoding the sequence of projection-based frames to generate a bitstream. Each projection-based frame has a 360-degree image/video content represented by rectangular projection faces packed in the viewport-based cube projection layout. The rectangular projection faces include a first rectangular projection face, a second rectangular projection face, a third rectangular projection face, a fourth rectangular projection face, a fifth rectangular projection face, and a sixth rectangular projection face split into partial rectangular projection faces. The first rectangular projection face corresponds to user's viewport, and is enclosed by a surrounding area composed of the second rectangular projection face, the third rectangular projection face, the fourth rectangular projection face, the fifth rectangular projection face, and the partial rectangular projection faces.