公开(公告)号：US11663690B2

公开(公告)日：2023-05-30

申请号：US17574516

申请日：2022-01-12

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00 ,  G06T3/60 ,  H04N13/161 ,  H04N13/117 ,  H04N19/597 ,  H04N19/85

CPC classification number: G06T3/0087 ,  G06T3/0062 ,  G06T3/60 ,  H04N13/161

Abstract: A video processing method includes: decoding apart of a bitstream to generate a decoded frame, where the decoded frame is a projection-based frame that includes projection faces in a projection layout; and remapping sample locations of the projection-based frame to locations on the sphere, where a sample location within the projection-based frame is converted into a local sample location within a projection face packed in the projection-based frame; in response to adjustment criteria being met, an adjusted local sample location within the projection face is generated by applying adjustment to at least one coordinate value of the local sample location within the projection face, and the adjusted local sample location within the projection face is remapped to a location on the sphere; and in response to the adjustment criteria not being met, the local sample location within the projection face is remapped to a location on the sphere.

公开(公告)号：US11190801B2

公开(公告)日：2021-11-30

申请号：US16899575

申请日：2020-06-11

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/597 ,  G06T3/00 ,  H04N19/70

Abstract: A video encoding method includes: encoding a projection-based frame to generate a part of a bitstream, wherein at least a portion of a 360-degree content of a sphere is mapped to projection faces via cube-based projection, and the projection-based frame has the projection faces packed in a cube-based projection layout; and signaling at least one syntax element via the bitstream, wherein said at least one syntax element is associated with a mapping function that is employed by the cube-based projection to determine sample locations for each of the projection faces.

公开(公告)号：US11190768B2

公开(公告)日：2021-11-30

申请号：US16898425

申请日：2020-06-10

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/119 ,  H04N19/70 ,  H04N19/167 ,  H04N19/184 ,  G06T3/00

Abstract: A video decoding method includes decoding a part of a bitstream to generate a decoded frame, and parsing at least one syntax element from the bitstream. The decoded frame is a projection-based frame that has projection faces packed in a cube-based projection layout. At least a portion of a 360-degree content of a sphere is mapped to the projection faces via cube-based projection. The at least one syntax element is indicative of packing of the projection faces in the cube-based projection layout.

公开(公告)号：US11057643B2

公开(公告)日：2021-07-06

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 ,  H04N19/563 ,  H04N19/86 ,  H04N19/59 ,  H04N5/232

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：US20210006785A1

公开(公告)日：2021-01-07

申请号：US16898425

申请日：2020-06-10

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/119 ,  H04N19/70 ,  G06T3/00 ,  H04N19/184 ,  H04N19/167

Abstract: A video decoding method includes decoding a part of a bitstream to generate a decoded frame, and parsing at least one syntax element from the bitstream. The decoded frame is a projection-based frame that has projection faces packed in a cube-based projection layout. At least a portion of a 360-degree content of a sphere is mapped to the projection faces via cube-based projection. The at least one syntax element is indicative of packing of the projection faces in the cube-based projection layout

公开(公告)号：US20190272616A1

公开(公告)日：2019-09-05

申请号：US16286622

申请日：2019-02-27

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00 ,  G06T3/40 ,  G06T7/13

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：US20180359459A1

公开(公告)日：2018-12-13

申请号：US15766829

申请日：2018-04-03

Applicant: MEDIATEK INC.

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

IPC: H04N13/161 ,  H04N13/111

CPC classification number: H04N13/161 ,  G06T3/005 ,  H04N13/111

Abstract: A video processing method includes obtaining projection face(s) from an omnidirectional content of a sphere, and obtaining a re-sampled projection face by re-sampling at least a portion of a projection face of the projection face(s) through non-uniform mapping. The omnidirectional content of the sphere is mapped onto the projection face(s) via a 360-degree Virtual Reality (360 VR) projection. The projection face has a first source region and a second source region. The re-sampled projection face has a first re-sampled region and a second re-sampled region. The first re-sampled region is derived from re-sampling the first source region with a first sampling density. The second re-sampled region is derived from re-sampling the second source region with a second sampling density that is different from the first sampling density.

公开(公告)号：US20220138898A1

公开(公告)日：2022-05-05

申请号：US17574516

申请日：2022-01-12

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00 ,  G06T3/60 ,  H04N13/161

Abstract: A video processing method includes: decoding apart of a bitstream to generate a decoded frame, where the decoded frame is a projection-based frame that includes projection faces in a projection layout; and remapping sample locations of the projection-based frame to locations on the sphere, where a sample location within the projection-based frame is converted into a local sample location within a projection face packed in the projection-based frame; in response to adjustment criteria being met, an adjusted local sample location within the projection face is generated by applying adjustment to at least one coordinate value of the local sample location within the projection face, and the adjusted local sample location within the projection face is remapped to a location on the sphere; and in response to the adjustment criteria not being met, the local sample location within the projection face is remapped to a location on the sphere.

公开(公告)号：US11303931B2

公开(公告)日：2022-04-12

申请号：US17177148

申请日：2021-02-16

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/597 ,  H04N19/70

Abstract: A video processing method includes a step of receiving a bitstream, and a step of decoding a part of the bitstream to generate a decoded frame, including parsing a plurality of syntax elements from the bitstream. The decoded frame is a projection-based frame that includes a plurality of projection faces packed at a plurality of face positions with different position indexes in a hemisphere cubemap projection layout. A portion of a 360-degree content of a sphere is mapped to the plurality of projection faces via hemisphere cubemap projection. Values of the plurality of syntax elements are indicative of face indexes of the plurality of projection faces packed at the plurality of face positions, respectively, and are constrained to meet a requirement of bitstream conformance.

公开(公告)号：US11263722B2

公开(公告)日：2022-03-01

申请号：US17143164

申请日：2021-01-07

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00 ,  G06T3/60 ,  H04N13/161

Abstract: A video processing method includes: decoding a part of a bitstream to generate a decoded frame, where the decoded frame is a projection-based frame that includes projection faces in a hemisphere cubemap projection layout; and remapping sample locations of the projection-based frame to locations on the sphere, where a sample location within the projection-based frame is converted into a local sample location within a projection face packed in the projection-based frame; in response to adjustment criteria being met, an adjusted local sample location within the projection face is generated by applying adjustment to one coordinate value of the local sample location within the projection face, and the adjusted local sample location within the projection face is remapped to a location on the sphere; and in response to the adjustment criteria not being met, the local sample location within the projection face is remapped to a location on the sphere.