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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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32.发明授权公开(公告)号：US10282814B2
公开(公告)日：2019-05-07
申请号：US15390954
申请日：2016-12-27
Applicant: MEDIATEK INC.
Inventor： Hung-Chih Lin , Shen-Kai Chang
IPC: G06T3/00 , H04N19/179 , H04N19/186 , H04N19/70 , G06T7/90 , H04N5/232
Abstract: Methods and apparatus of processing cube face images are disclosed. According one method, each set of six cubic faces is converted into one rectangular assembled image by assembling each set of six cubic faces to maximize a number of continuous boundaries and to minimize a number of discontinuous boundaries. Each continuous boundary corresponds to one boundary between two connected faces with continuous contents from one face to another face. Each discontinuous boundary corresponds to one boundary between two connected faces with discontinuous contents from one face to another face. The method may further comprise applying video coding to the video sequence outputting the compressed data of the video sequence. According to another method, a fully-connected cubic-face image representing an unfolded image from the six faces of the cube is generated and the blank areas are filled with padding data to form a rectangular assembled image.
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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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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：US20180276788A1
公开(公告)日：2018-09-27
申请号：US15927028
申请日：2018-03-20
Applicant: MEDIATEK INC.
Inventor： Ya-Hsuan Lee , Hung-Chih Lin , Jian-Liang Lin , Shen-Kai Chang
IPC: G06T3/00
Abstract: A video processing method includes receiving an omnidirectional content corresponding to a sphere, generating a projection-based frame according to at least the omnidirectional content and a segmented sphere projection (SSP) format, 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 first circular projection face, a second circular projection face, and at least one rectangular projection face packed in an SSP layout. A north polar region of the sphere is mapped onto the first circular projection face. A south polar region of the sphere is mapped onto the second circular projection face. At least one non-polar ring-shaped segment between the north polar region and the south polar region of the sphere is mapped onto said at least one rectangular projection face.
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Patent Agency Ranking
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：US20180054613A1
公开(公告)日：2018-02-22
申请号：US15675810
申请日：2017-08-14
Applicant: MEDIATEK INC.
Inventor： Jian-Liang Lin , Hung-Chih Lin , Shen-Kai Chang
IPC: H04N19/117 , H04N19/91 , H04N19/172
Abstract: A video encoding method includes: generating reconstructed blocks for coding blocks within a frame, respectively, wherein the frame has a 360-degree image content represented by projection faces arranged in a 360-degree Virtual Reality (360 VR) projection layout, and there is at least one image content discontinuity edge resulting from packing of the projection faces in the frame; and configuring at least one in-loop filter, such that the at least one in-loop filter does not apply in-loop filtering to reconstructed blocks located at the least one image content discontinuity edge.
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公开(公告)号：US20170026648A1
公开(公告)日：2017-01-26
申请号：US15209774
申请日：2016-07-14
Applicant: MEDIATEK INC.
Inventor： Ming-Long Wu , Sheng-Jen Wang , Chia-Yun Cheng , Yu-Cheng Chu , Hao-Chun Chung , Shen-Kai Chang , Yung-Chang Chang
IPC: H04N19/13 , H04N19/44 , H04N19/42 , H04N19/176
Abstract: A hybrid video decoder has a hardware decoding circuit, a software decoding circuit, and a meta-data access system. The hardware decoding circuit deals with a first portion of a video decoding process for at least a portion of a frame, wherein the first portion of the video decoding process includes entropy decoding. The software decoding circuit deals with a second portion of the video decoding process. The meta-data access system manages meta data transferred between the hardware decoding circuit and the software decoding circuit.
Abstract translation: 混合视频解码器具有硬件解码电路，软件解码电路和元数据访问系统。 硬件解码电路处理帧的至少一部分的视频解码处理的第一部分，其中视频解码处理的第一部分包括熵解码。 软件解码电路处理视频解码过程的第二部分。 元数据访问系统管理在硬件解码电路和软件解码电路之间传送的元数据。
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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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