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公开(公告)号：US20190251660A1
公开(公告)日：2019-08-15
申请号：US16392644
申请日：2019-04-24
Applicant: MEDIATEK INC.
Inventor： Hung-Chih Lin , Chao-Chih Huang , Chia-Ying Li , Jian-Liang Lin , Shen-Kai Chang
Abstract: A video processing method includes receiving a bitstream, processing the bitstream to obtain at least one syntax element from the bitstream, and decoding the bitstream to generate a current decoded frame having a rotated 360-degree image/video content represented in a 360-degree Virtual Reality (360 VR) projection format. The at least one syntax element signaled via the bitstream indicates rotation information of content-oriented rotation that is involved in generating the rotated 360-degree image/video content, and includes a first syntax element. When the content-oriented rotation is enabled, the first syntax element indicates a rotation degree along a specific rotation axis.
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公开(公告)号：US20190088001A1
公开(公告)日：2019-03-21
申请号：US15769750
申请日：2017-09-30
Applicant: MEDIATEK INC.
Inventor： Jian-Liang Lin , Hung-Chih Lin , Chia-Ying Li , Shen-Kai Chang , Chi-Cheng Ju , Chao-Chih Huang , Hui Ouyang
Abstract: A projection-based frame is generated according to an omnidirectional video frame and an octahedron projection layout. The projection-based frame has a 360-degree image content represented by triangular projection faces assembled in the octahedron projection layout. A 360-degree image content of a viewing sphere is mapped onto the triangular projection faces via an octahedron 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.
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公开(公告)号：US10573076B2
公开(公告)日：2020-02-25
申请号：US15839799
申请日：2017-12-12
Applicant: MEDIATEK INC.
Inventor： Hung-Chih Lin , Chia-Ying Li , Le Shi , Ya-Hsuan Lee , Jian-Liang Lin , Shen-Kai Chang
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 a viewport-based cube projection layout, and encoding the sequence of projection-based frames to generate a bitstream. Each projection-based frame has a 360-degree image/video content represented by rectangular projection faces packed in the viewport-based cube projection layout. The rectangular projection faces include a first rectangular projection face, a second rectangular projection face, a third rectangular projection face, a fourth rectangular projection face, a fifth rectangular projection face, and a sixth rectangular projection face split into partial rectangular projection faces. The first rectangular projection face corresponds to user's viewport, and is enclosed by a surrounding area composed of the second rectangular projection face, the third rectangular projection face, the fourth rectangular projection face, the fifth rectangular projection face, and the partial rectangular projection faces.
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公开(公告)号：US10394518B2
公开(公告)日：2019-08-27
申请号：US15450005
申请日：2017-03-05
Applicant: MEDIATEK INC.
Inventor： Xin-Wei Shih , Chia-Ying Li , Chao-Ling Hsu , Yiou-Wen Cheng , Shen-Kai Chang
Abstract: An audio synchronization method includes: receiving a first audio signal from a first recording device; receiving a second audio signal from a second recording device; performing a correlation operation upon the first audio signal and the second audio signal to align a first pattern of the first audio signal and the first pattern of the second audio signal; after the first patterns of the first audio signal and the second audio signal are aligned, calculating a difference between a second pattern of the first audio signal and the second pattern of the second audio signal; and obtaining a starting-time difference between the first audio signal and the second audio signal for audio synchronization according to the difference between the second pattern of the first audio signal and the second pattern of the second audio signal.
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公开(公告)号：US10264282B2
公开(公告)日：2019-04-16
申请号：US15629855
申请日：2017-06-22
Applicant: MEDIATEK INC.
Inventor： Chao-Chih Huang , Hung-Chih Lin , Jian-Liang Lin , Chia-Ying Li , Shen-Kai Chang
IPC: H04N19/105 , H04N19/167 , H04N19/176 , H04N19/597
Abstract: A method and apparatus of video encoding or decoding for a video encoding or decoding system applied to multi-face sequences corresponding to a 360-degree virtual reality sequence are disclosed. According the present invention, one or more multi-face sequences representing the 360-degree virtual reality sequence are derived. If Inter prediction is selected for a current block in a current face, one virtual reference frame is derived for each face of said one or more multi-face sequences by assigning one target reference face to a center of said one virtual reference frame and connecting neighboring faces of said one target reference face to said one target reference face at boundaries of said one target reference face. Then, the current block in the current face is encoded or decoded using a current virtual reference frame derived for the current face to derive an Inter predictor for the current block.
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Patent Agency Ranking
公开(公告)号：US10249019B2
公开(公告)日：2019-04-02
申请号：US15585224
申请日：2017-05-03
Applicant: MEDIATEK INC.
Inventor： Jian-Liang Lin , Hung-Chih Lin , Chia-Ying Li , Shen-Kai Chang
IPC: G06T3/00 , H04N13/139 , H04N19/70 , H04N19/597 , H04N19/88
Abstract: Methods and apparatus of processing omnidirectional images are disclosed. According to one method, a current set of omnidirectional images converted from each spherical image in a 360-degree panoramic video sequence using a selected projection format is received, where the selected projection format belongs to a projection format group comprising a cubicface format, and the current set of omnidirectional images with the cubicface format consists of six cubic faces. If the selected projection format corresponds to the cubicface format, one or more mapping syntax elements to map the current set of omnidirectional images into a current cubemap image are signaled. The coded data are then provided in a bitstream including said one or more mapping syntax elements for the current set of omnidirectional images.
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公开(公告)号：US20180262775A1
公开(公告)日：2018-09-13
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 , H04N5/232 , H04N19/59 , H04N19/86
CPC classification number: H04N19/597 , H04N5/23238 , H04N19/563 , H04N19/59 , H04N19/86
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.
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公开(公告)号：US20180165886A1
公开(公告)日：2018-06-14
申请号：US15839799
申请日：2017-12-12
Applicant: MEDIATEK INC.
Inventor： Hung-Chih Lin , Chia-Ying Li , Le Shi , Ya-Hsuan Lee , Jian-Liang Lin , Shen-Kai Chang
CPC classification number: G06T19/006 , G02B27/017 , G06T3/005 , G06T9/00 , G06T15/205 , G06T19/00
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 a viewport-based cube projection layout, and encoding the sequence of projection-based frames to generate a bitstream. Each projection-based frame has a 360-degree image/video content represented by rectangular projection faces packed in the viewport-based cube projection layout. The rectangular projection faces include a first rectangular projection face, a second rectangular projection face, a third rectangular projection face, a fourth rectangular projection face, a fifth rectangular projection face, and a sixth rectangular projection face split into partial rectangular projection faces. The first rectangular projection face corresponds to user's viewport, and is enclosed by a surrounding area composed of the second rectangular projection face, the third rectangular projection face, the fourth rectangular projection face, the fifth rectangular projection face, and the partial rectangular projection faces.
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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.
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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.
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