公开(公告)号：US20200226711A1

公开(公告)日：2020-07-16

申请号：US16830288

申请日：2020-03-26

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Hui Ou Yang ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/00 ,  G06T19/00 ,  G06T1/00 ,  G02B27/01

Abstract: A video processing method includes receiving a bitstream, and decoding, by a video decoder, the bitstream to generate a decoded frame. The decoded frame is a projection-based frame that has a 360-degree image/video content represented by triangular projection faces packed in a triangle-based projection layout. An omnidirectional image/video content of a viewing sphere is mapped onto the triangular projection faces via a triangle-based projection of the viewing sphere. An equator of the viewing sphere is not mapped along any side of each of the triangular projection faces.

公开(公告)号：US20200211258A1

公开(公告)日：2020-07-02

申请号：US16816273

申请日：2020-03-12

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 ,  G06T15/08 ,  G06T3/00 ,  H04N13/00

Abstract: A projection-based frame is generated according to an omnidirectional video frame and a triangle-based projection layout. The projection-based frame has a 360-degree image content represented by triangular projection faces assembled in the triangle-based projection layout. A 360-degree image content of a viewing sphere is mapped onto the triangular projection faces via a triangle-based 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：US10679324B2

公开(公告)日：2020-06-09

申请号：US16460958

申请日：2019-07-02

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Chao-Chih Huang ,  Chia-Ying Li ,  Hui Ou Yang ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC: G06T3/00 ,  G06T1/00 ,  G06T3/60 ,  G06T19/00 ,  G02B27/01

Abstract: A video processing method includes receiving a bitstream, and decoding, by a video decoder, the bitstream to generate a decoded frame. The decoded frame is a projection-based frame that has a 360-degree image/video content represented by triangular projection faces packed in an octahedron projection layout. An omnidirectional image/video content of a viewing sphere is mapped onto the triangular projection faces via an octahedron projection of the viewing sphere. An equator of the viewing sphere is not mapped along any side of each of the triangular projection faces.

公开(公告)号：US10652516B2

公开(公告)日：2020-05-12

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: H04N13/161 ,  G06T3/00 ,  H04N13/139 ,  H04N19/597 ,  H04N19/59 ,  H04N19/00

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：US10462459B2

公开(公告)日：2019-10-29

申请号：US15485694

申请日：2017-04-12

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh Chen ,  Jian-Liang Lin ,  Tzu-Der Chuang ,  Yu-Wen Huang

IPC: H04N19/117 ,  H04N19/80 ,  H04N19/176 ,  H04N19/107 ,  H04N19/139 ,  H04N19/126 ,  H04N19/86 ,  H04N19/186 ,  H04N19/157 ,  H04N19/82

Abstract: Aspects of the disclosure provide a method for denoising a reconstructed picture. The method can include receiving reconstructed video data corresponding to a picture, dividing the picture into current patches, forming patch groups each including a current patch and a number of reference patches that are similar to the current patch, denoising the patch groups to modify pixel values of the patch groups to create a filtered picture, and generating a reference picture based on the filtered picture for encoding or decoding a picture. The operation of denoising the patch groups includes deriving a variance of compression noise in the respective patch group based on a compression noise model. A selection of model parameters is determined based on coding unit level information.

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：US10368067B2

公开(公告)日：2019-07-30

申请号：US15618216

申请日：2017-06-09

Applicant: MEDIATEK INC.

Inventor： Hung-Chih Lin ,  Jian-Liang Lin ,  Chia-Ying Li ,  Chao-Chih Huang ,  Shen-Kai Chang

IPC: H04N19/00 ,  H04N19/117 ,  H04N19/167 ,  H04N19/172 ,  H04N19/196 ,  H04N19/463 ,  H04N19/70 ,  H04N19/82 ,  H04N5/232 ,  H04N19/597 ,  H04N19/46 ,  H04N5/225

Abstract: Methods and apparatus of processing cube face images are disclosed. According to embodiments of the present invention, one or more discontinuous boundaries within each assembled cubic frame are determined and used for selective filtering, where the filtering process is skipped at said one or more discontinuous boundaries within each assembled cubic frame when the filtering process is enabled. Furthermore, the filtering process is applied to one or more continuous areas in each assembled cubic frame.

公开(公告)号：US10341638B2

公开(公告)日：2019-07-02

申请号：US14758413

申请日：2014-01-07

Applicant: MediaTek Inc.

Inventor： Jian-Liang Lin ,  Yi-Wen Chen

IPC: H04N19/176 ,  H04N13/161 ,  H04N19/105 ,  H04N19/597 ,  H04N19/52

Abstract: A method and apparatus using a single converted DV (disparity vector) from the depth data for a conversion region are disclosed. Embodiments according to the present invention receive input data and depth data associated with a conversion region of a current picture in a current dependent view. The conversion region is checked to determine whether it is partitioned into multiple motion prediction sub-blocks. If the conversion region is partitioned into multiple motion prediction sub-blocks, then a single converted DV from the depth data associated with the conversion region is determined and each of the multiple motion prediction sub-blocks of the conversion region is processed according to a first coding tool using the single converted DV. If the conversion region is not partitioned into multiple motion prediction sub-blocks, the conversion region is processed according to the first coding tool or a second coding tool using the single converted DV.

公开(公告)号：US10194170B2

公开(公告)日：2019-01-29

申请号：US15354435

申请日：2016-11-17

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Yu-Wen Huang

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/59 ,  H04N19/80 ,  H04N19/593 ,  H04N19/159 ,  H04N19/46 ,  H04N19/635 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182

Abstract: Aspects of the disclosure provide a method for video coding. The method includes receiving input data associated with a processing block in a current picture, selecting, from a set of neighboring reconstructed samples for intra-coding pixels in the processing block, a plurality of reference samples for a pixel in the processing block based on a position of the pixel and an intra prediction mode of the processing block, determining a projection phase for the pixel based on the position of the pixel and the intra prediction mode of the processing block, determining coefficients of an interpolation filter based on the projection phase for the pixel, applying the interpolation filter with the determined coefficients on the reference samples to generate a prediction of the pixel, and encoding or decoding the pixel in the processing block using the prediction of the pixel.

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.