公开(公告)号：US20180130175A1

公开(公告)日：2018-05-10

申请号：US15802481

申请日：2017-11-03

Applicant: MEDIATEK INC.

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

IPC: G06T3/40 ,  G06T19/00

Abstract: A video processing method includes: receiving a current input frame having a 360-degree image/video content represented in a 360-degree Virtual Reality (360 VR) projection format, applying content-oriented rotation to the 360-degree image/video content in the current input frame to generate a content-rotated frame having a rotated 360-degree image/video content represented in the 360 VR projection format, encoding the content-rotated frame to generate a bitstream, and signaling at least one syntax element via the bitstream, wherein the at least one syntax element is set to indicate rotation information of the content-oriented rotation.

公开(公告)号：US20190325553A1

公开(公告)日：2019-10-24

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 ,  G02B27/01 ,  G06T1/00 ,  G06T19/00

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：US10380715B2

公开(公告)日：2019-08-13

申请号：US15825081

申请日：2017-11-28

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 ,  G06T3/60 ,  G06T19/00 ,  G06T1/00 ,  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 an octahedron projection layout, and encoding, by a video encoder, the sequence of projection-based frames to generate a bitstream. Each projection-based frame has a 360-degree image/video content represented by triangular projection faces packed in the octahedron projection layout. The omnidirectional image/video content of the 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：US10187640B2

公开(公告)日：2019-01-22

申请号：US15191308

申请日：2016-06-23

Applicant: MediaTek Inc.

Inventor： Chao-Chih Huang ,  Ting-An Lin ,  Shen-Kai Chang ,  Han-Liang Chou

IPC: H04N7/12 ,  H04N19/61 ,  H04N19/17 ,  H04N19/15 ,  H04N19/176 ,  H04N19/174 ,  H04N19/169

Abstract: A method and system for encoding a group of coding blocks and packetizing the compressed data into slices/packets with hard-limited packet size are disclosed. According to the present invention, a packetization map for at least a portion of a current picture is determined. The packetization map associates coding blocks in at least a portion of the current picture with one or more packets by identifying a corresponding group of coding blocks for each packet of said one or more packets. The corresponding group of coding blocks for each packet is then encoded according to the packetization map and the size of each packet is determined. The packet size is checked. If any packet size exceeds a constrained size, a new packetization map is generated and the corresponding group of coding blocks for each packet is encoded according to the new packetization map.

公开(公告)号：US20170026659A1

公开(公告)日：2017-01-26

申请号：US15289092

申请日：2016-10-07

Applicant: MediaTek Inc.

Inventor： Hung-Chih Lin ,  Shen-Kai Chang ,  Chao-Chih Huang

IPC: H04N19/44 ,  H04N19/172 ,  H04N19/136

CPC classification number: H04N19/597 ,  H04N19/426 ,  H04N19/88

Abstract: Apparatus and methods are disclosed for partially decoding video frames when a sub-region of the video is selected for viewing. The method identifies and decodes data units and pixel blocks of video frames needed to display the sub-region while bypassing data units and pixel blocks that are identified as unnecessary for displaying the sub-region. A video encoder receives a video frame comprising a plurality of cubic surfaces in a first configuration corresponding to a full sized 360VR image. Each cubic surface corresponds to a different surface of a cube. The encoder reformats the received video frame by rearranging the plurality of cubic surfaces according to a second configuration that is different than the first configuration. The second configuration re-arranges the six surfaces of a cubic 360VR image in order to fully utilize the line buffer and allow the line buffer to be narrower than the full sized 360VR image.

Abstract translation: 公开了当视频的子区域被选择用于观看时部分地解码视频帧的装置和方法。 该方法识别和解码显示子区域所需的视频帧的数据单元和像素块，同时绕过被识别为不必要显示子区域的数据单元和像素块。 视频编码器以对应于全尺寸360VR图像的第一配置接收包括多个立方体表面的视频帧。 每个立方体表面对应于立方体的不同表面。 编码器通过根据与第一配置不同的第二配置来重排多个立方体表面来重新格式化接收到的视频帧。 第二种配置重新排列立方360VR图像的六个表面，以便充分利用行缓冲区，并允许行缓冲区比全尺寸360VR图像更窄。

公开(公告)号：US20150237353A1

公开(公告)日：2015-08-20

申请号：US14606027

申请日：2015-01-27

Applicant: MEDIATEK INC.

Inventor： Chao-Chih Huang

IPC: H04N19/176 ,  H04N19/91

CPC classification number: H04N19/60 ,  H04N19/436 ,  H04N19/91

Abstract: A method for encoding a frame divided into a plurality of tiles includes: storing encoding-related information derived from blocks in a last block row of a first tile of the frame into a storage device; reading the encoding-related information from the storage device; and performing entropy encoding upon blocks in a first block row of a second tile of the frame based at least partly on the encoding-related information read from the storage device. The first block row of the second tile is vertically adjacent to the last block row of the first tile. The entropy encoding of the first block row of the second tile is started before entropy encoding of the last block row of the first tile is accomplished.

Abstract translation: 一种分割为多个瓦片的帧的编码方法包括：将从帧的第一瓦片的最后块行中得到的编码相关信息存储到存储装置中; 从存储设备读取编码相关信息; 以及至少部分地基于从所述存储设备读取的编码相关信息，对所述帧的第二块的第一块行中的块执行熵编码。 第二瓦片的第一块行与第一瓦片的最后一个块行垂直相邻。 在完成第一瓦片的最后一个块行的熵编码之前，开始第二瓦片的第一块行的熵编码。

公开(公告)号：US10972730B2

公开(公告)日：2021-04-06

申请号：US16386356

申请日：2019-04-17

Applicant: MEDIATEK INC.

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

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

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：US10825229B2

公开(公告)日：2020-11-03

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

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：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.