公开(公告)号：US10986371B2

公开(公告)日：2021-04-20

申请号：US16361213

申请日：2019-03-22

Applicant: MEDIATEK INC.

Inventor： Sheng-Yen Lin ,  Lin Liu ,  Jian-Liang Lin

IPC: H04N19/597 ,  H04N19/117 ,  H04N19/176 ,  G06K9/62

Abstract: A sample adaptive offset (SAO) filtering method for a reconstructed projection-based frame includes: obtaining at least one padding pixel in a padding area that acts as an extension of a face boundary of a first projection face, and applying SAO filtering to a block that has at least one pixel included in the first projection face. In the reconstructed projection-based frame, there is image content discontinuity between the face boundary of the first projection face and a face boundary of a second projection face. The at least one padding pixel is involved in the SAO filtering of the block.

公开(公告)号：US11477490B2

公开(公告)日：2022-10-18

申请号：US17134196

申请日：2020-12-25

Applicant: MEDIATEK INC.

Inventor： Sheng-Yen Lin ,  Jian-Liang Lin

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/184 ,  H04N19/132 ,  H04N19/597

Abstract: A video processing method includes receiving a reconstructed frame, and applying in-loop filtering, by at least one in-loop filter, to the reconstructed frame. The step of in-loop filtering includes performing a sample adaptive offset (SAO) filtering operation. The step of performing the SAO filtering operation includes keeping a value of a current pixel unchanged by blocking the SAO filtering operation of the current pixel included in the reconstructed frame from being applied across a virtual boundary defined in the reconstructed frame.

公开(公告)号：US20210211736A1

公开(公告)日：2021-07-08

申请号：US17134196

申请日：2020-12-25

Applicant: MEDIATEK INC.

Inventor： Sheng-Yen Lin ,  Jian-Liang Lin

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/597 ,  H04N19/132 ,  H04N19/184

Abstract: A video processing method includes receiving a reconstructed frame, and applying in-loop filtering, by at least one in-loop filter, to the reconstructed frame. The step of in-loop filtering includes performing a sample adaptive offset (SAO) filtering operation. The step of performing the SAO filtering operation includes keeping a value of a current pixel unchanged by blocking the SAO filtering operation of the current pixel included in the reconstructed frame from being applied across a virtual boundary defined in the reconstructed frame.

公开(公告)号：US20190281293A1

公开(公告)日：2019-09-12

申请号：US16296231

申请日：2019-03-08

Applicant: MEDIATEK INC.

Inventor： Sheng-Yen Lin ,  Jian-Liang Lin ,  Cheng-Hsuan Shih

IPC: H04N19/117 ,  H04N19/14 ,  H04N19/182 ,  H04N19/52

Abstract: A de-blocking method is applied to a reconstructed projection-based frame having a first projection face and a second projection face, and includes obtaining a first spherical neighboring block for a first block with a block edge to be de-blocking filtered, and selectively applying de-blocking to the block edge of the first block for at least updating a portion of pixels of the first block. There is image content discontinuity between a face boundary of the first projection face and a face boundary of the second projection face. The first block is a part of the first projection face, and the block edge of the first block is a part of the face boundary of the first projection face. A region on a sphere to which the first spherical neighboring block corresponds is adjacent to a region on the sphere from which the first projection face is obtained.

公开(公告)号：US20190281273A1

公开(公告)日：2019-09-12

申请号：US16296187

申请日：2019-03-07

Applicant: MEDIATEK INC.

Inventor： Sheng-Yen Lin ,  Jian-Liang Lin

IPC: H04N13/161 ,  H04N19/117 ,  H04N19/82 ,  H04N19/167 ,  H04N19/176 ,  H04N19/597

Abstract: An adaptive loop filtering (ALF) method for a reconstructed projection-based frame includes: obtaining at least one spherical neighboring pixel in a padding area that acts as an extension of a face boundary of a first projection face, and applying adaptive loop filtering to a block in the first projection face. In the reconstructed projection-based frame, there is image content discontinuity between the face boundary of the first projection face and a face boundary of a second projection face. A region on the sphere to which the padding area corresponds is adjacent to a region on the sphere from which the first projection face is obtained. The at least one spherical neighboring pixel is involved in the adaptive loop filtering of the block.

公开(公告)号：US10659780B2

公开(公告)日：2020-05-19

申请号：US16296231

申请日：2019-03-08

Applicant: MEDIATEK INC.

Inventor： Sheng-Yen Lin ,  Jian-Liang Lin ,  Cheng-Hsuan Shih

IPC: H04N13/00 ,  H04N19/46 ,  H04N19/167 ,  H04N19/86 ,  H04N19/117 ,  H04N19/52 ,  H04N19/182 ,  H04N19/14

Abstract: A de-blocking method is applied to a reconstructed projection-based frame having a first projection face and a second projection face, and includes obtaining a first spherical neighboring block for a first block with a block edge to be de-blocking filtered, and selectively applying de-blocking to the block edge of the first block for at least updating a portion of pixels of the first block. There is image content discontinuity between a face boundary of the first projection face and a face boundary of the second projection face. The first block is a part of the first projection face, and the block edge of the first block is a part of the face boundary of the first projection face. A region on a sphere to which the first spherical neighboring block corresponds is adjacent to a region on the sphere from which the first projection face is obtained.

公开(公告)号：US20190297350A1

公开(公告)日：2019-09-26

申请号：US16361213

申请日：2019-03-22

Applicant: MEDIATEK INC.

Inventor： Sheng-Yen Lin ,  LIN LIU ,  Jian-Liang Lin

IPC: H04N19/597 ,  H04N19/117 ,  H04N19/176 ,  G06K9/62

Abstract: A sample adaptive offset (SAO) filtering method for a reconstructed projection-based frame includes: obtaining at least one padding pixel in a padding area that acts as an extension of a face boundary of a first projection face, and applying SAO filtering to a block that has at least one pixel included in the first projection face. In the reconstructed projection-based frame, there is image content discontinuity between the face boundary of the first projection face and a face boundary of a second projection face. The at least one padding pixel is involved in the SAO filtering of the block.