公开(公告)号：US11405630B2

公开(公告)日：2022-08-02

申请号：US17372515

申请日：2021-07-11

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, wherein the decoded frame is a projection-based frame that includes a plurality of projection faces packed in a projection layout with M projection face columns and N projection face rows, M and N are positive integers, and at least a portion of a 360-degree content of a sphere is mapped to the plurality of projection faces via projection. Regarding the decoded frame, a picture width excluding guard band samples is equal to an integer multiple of M, and a picture height excluding guard band samples is equal to an integer multiple of N.

公开(公告)号：US20210337230A1

公开(公告)日：2021-10-28

申请号：US17372515

申请日：2021-07-11

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

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

Abstract: A video decoding method includes decoding a part of a bitstream to generate a decoded frame, wherein the decoded frame is a projection-based frame that includes a plurality of projection faces packed in a projection layout with M projection face columns and N projection face rows, M and N are positive integers, and at least a portion of a 360-degree content of a sphere is mapped to the plurality of projection faces via projection. Regarding the decoded frame, a picture width excluding guard band samples is equal to an integer multiple of M, and a picture height excluding guard band samples is equal to an integer multiple of N.

公开(公告)号：US20210127126A1

公开(公告)日：2021-04-29

申请号：US17075724

申请日：2020-10-21

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

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

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：US20210006832A1

公开(公告)日：2021-01-07

申请号：US16899575

申请日：2020-06-11

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

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

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：US20200234399A1

公开(公告)日：2020-07-23

申请号：US16639118

申请日：2018-08-17

Applicant: MEDIATEK INC.

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

IPC: G06T3/00 ,  H04N19/85 ,  H04N19/597 ,  G06T19/20

Abstract: An exemplary video processing method includes: receiving an omnidirectional content corresponding to a sphere; obtaining a plurality of projection faces from the omnidirectional content of the sphere according to a pyramid projection; creating at least one padding region; and generating a projection-based frame by packing the projection faces and the at least one padding region in a pyramid projection layout. The projection faces packed in the pyramid projection layout include a first projection face. The at least one padding region packed in the pyramid projection layout includes a first padding region. The first padding region connects with at least the first projection face, and forms at least a portion of one boundary of the pyramid projection layout.

公开(公告)号：US11405629B2

公开(公告)日：2022-08-02

申请号：US17372507

申请日：2021-07-11

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：US20210392374A1

公开(公告)日：2021-12-16

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：US20210337229A1

公开(公告)日：2021-10-28

申请号：US17372507

申请日：2021-07-11

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

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

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：US20210006838A1

公开(公告)日：2021-01-07

申请号：US16917917

申请日：2020-07-01

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/70 ,  H04N19/184

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 includes 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 a guard band configuration of the projection-based frame.

公开(公告)号：US20190026858A1

公开(公告)日：2019-01-24

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: G06T3/00 ,  G06T19/00 ,  H04N19/182

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.