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    METHOD AND APPARATUS FOR SIGNALING SPHERICAL REGION INFORMATION IN ISOBMFF
    11.
    发明申请
    METHOD AND APPARATUS FOR SIGNALING SPHERICAL REGION INFORMATION IN ISOBMFF 审中-公开

    公开(公告)号：US20200053282A1

    公开(公告)日：2020-02-13

    申请号：US16498397

    申请日：2018-03-29

    Applicant: MEDIATEK INC.

    Inventor： Xin Wang ,  Lulin Chen ,  Wang Lin Lai

    IPC: H04N5/232 ,  H04N21/2343 ,  H04N21/236 ,  H04N21/81 ,  H04N13/139 ,  H04N13/178

    Abstract: A video processing method includes receiving a virtual reality (VR) content, encoding visual data obtained from the VR content to generate a part of a coded bitstream, and encapsulating the part of the coded bitstream into ISO Base Media File Format (ISOBMFF) file (s). In one exemplary implementation, the ISOBMFF file (s) may include a timed metadata track associated with a sphere visual track, where the timed metadata track is set to signal that the associated sphere visual track contains at least one spherical region contributed from at least one region visual track. In another exemplary implementation, the ISOBMFF file (s) may include a timed metadata track associated with a region visual track, where the timed metadata track is set to signal that the associated region visual track contributes to at least one spherical region carried in at least one sphere visual track. Further, an associated video processing apparatus is provided.

    Method and apparatus for palette coding with cross block prediction
    12.
    发明授权
    Method and apparatus for palette coding with cross block prediction 有权

    公开(公告)号：US10531119B2

    公开(公告)日：2020-01-07

    申请号：US16203994

    申请日：2018-11-29

    Applicant: MediaTek Inc.

    Inventor： Yu-Chen Sun ,  Jungsun Kim ,  Tzu-Der Chuang ,  Yi-Wen Chen ,  Wang Lin Lai ,  Shan Liu ,  Yu-Wen Huang

    IPC: H04N19/182 ,  H04N19/593 ,  H04N19/124 ,  H04N19/176 ,  H04N19/186

    Abstract: A method and apparatus for color index coding of a block of video data using index prediction based on reconstructed neighboring pixels are disclosed. In one embodiment, color index encoding or decoding is applied to the current pixel indices by deriving index prediction from neighboring pixel indices of the reconstructed neighboring pixels. The reconstructed neighboring pixel values are first transformed into the neighboring pixel indices according to a quantization table to map between major color indices and major color values of the current block. The quantization table can be based on a major color table for the current block or can also be derived at a decoder side. The decoding process may reconstruct the current pixels by converting decoded current pixel indices to reconstructed current pixel values according to the quantization table or by directly copying the reconstructed neighboring pixel values indicated by decoded current pixel indices.

    Method and apparatus for requesting and receiving selected segment streams based on projection information
    13.
    发明授权
    Method and apparatus for requesting and receiving selected segment streams based on projection information 有权

    公开(公告)号：US10313763B2

    公开(公告)日：2019-06-04

    申请号：US15660710

    申请日：2017-07-26

    Applicant: MEDIATEK INC.

    Inventor： Wang Lin Lai ,  Shan Liu ,  Xin Wang

    IPC: H04N21/81 ,  H04N7/01 ,  H04N21/2343 ,  H04N21/44

    Abstract: Aspects of the disclosure provide an apparatus having an interface circuit, a processing circuit, and a display device. The interface circuit is configured to receive media presentation description information of media data. The media data includes video content on a two-dimensional (2D) plane that is projected from video content of a sphere surface. The video content on the 2D plane includes a plurality of segment streams having different coverages on the 2D plane. The media presentation description information uses projection based spatial relationship description (P-SRD) to describe the different coverages of the video content on the 2D plane according to the projection. The processing circuit is configured to determine one or more segment streams based on a region of interests for image generation and the P-SRD, select segments in the one or more segment streams, and cause the interface circuit to request and receive the selected segments.

    METHOD AND APPARATUS FOR STREAMING VIDEO CONTENT
    14.
    发明申请
    METHOD AND APPARATUS FOR STREAMING VIDEO CONTENT 审中-公开

    公开(公告)号：US20180035172A1

    公开(公告)日：2018-02-01

    申请号：US15660710

    申请日：2017-07-26

    Applicant: MEDIATEK INC.

    Inventor： Wang Lin Lai ,  Shan Liu ,  Xin Wang

    IPC: H04N21/81 ,  H04N21/44 ,  H04N7/01 ,  H04N21/2343

    CPC classification number: H04N21/816 ,  H04N7/0117 ,  H04N21/234363 ,  H04N21/44008 ,  H04N21/8146

    Abstract: Aspects of the disclosure provide an apparatus having an interface circuit, a processing circuit and a display device. The interface circuit is configured to receive media presentation description information of media data. The media data includes video content on a two-dimensional (2D) plane that is projected from video content of a sphere surface according to a projection. The video content on the 2D plane includes a plurality of segment streams having different coverages of the video content on the 2D plane. The media presentation description information uses projection based spatial relationship description (P-SRD) to describe the different coverages of the video content on the 2D plane according to the projection. The processing circuit is configured to determine one or more segment streams based on a region of interests for image generation and the P-SRD, select segments in the one or more segment streams, and cause the interface circuit to request and receive the selected segments.

    Method and apparatus for deriving composite tracks
    15.
    发明授权
    Method and apparatus for deriving composite tracks 有权

    公开(公告)号：US10805620B2

    公开(公告)日：2020-10-13

    申请号：US15865916

    申请日：2018-01-09

    Applicant: MEDIATEK INC.

    Inventor： Xin Wang ,  Wang Lin Lai ,  Lulin Chen ,  Shan Liu

    IPC: H04N19/169 ,  H04N19/167 ,  H04N19/136 ,  H04N19/70 ,  H04N21/81 ,  H04N21/854 ,  H04N21/234 ,  H04N19/103

    Abstract: Aspects of the disclosure provide a method and an apparatus for deriving composite tracks. The disclosed apparatus includes a processing circuitry. The processing circuitry is configured to generate a file that includes elementary track boxes respectively for elementary tracks. The elementary track box indexes a sequence of media samples in a time order that forms an elementary track. The processing circuitry is configured to construct a composite track box for a composite track. The composite track box identifies one or more elementary tracks, and a composite operation to form the composite track based on the one or more elementary tracks. The processing circuitry is further configured to generate a media presentation based on the composite track.

    Method and apparatus for track composition
    16.
    发明授权
    Method and apparatus for track composition 有权

    公开(公告)号：US10602239B2

    公开(公告)日：2020-03-24

    申请号：US15928823

    申请日：2018-03-22

    Applicant: MEDIATEK INC.

    Inventor： Lulin Chen ,  Xin Wang ,  Shuai Zhao ,  Wang Lin Lai

    IPC: H04N21/854 ,  G06F16/78 ,  H04N5/265 ,  H04N5/262 ,  H04N5/272 ,  G11B27/031 ,  H04N21/431

    Abstract: Aspects of the disclosure provide an apparatus that includes interface circuitry and processing circuitry. The interface circuitry is configured to receive signals carrying metadata for visual track composition from multiple visual tracks. The visual track composition includes alpha compositing, and can include spatial compositing and background compositing. The processing circuitry is configured to parse the metadata to extract configuration information for the visual track composition. Further, the processing circuitry receives a first sample from a first visual track and a second sample from a second visual track, and combines the first sample with the second sample to generate a composite sample based on the configuration information for the visual track composition.

    METHOD AND APPARATUS FOR DERIVING COMPOSITE TRACKS
    18.
    发明申请
    METHOD AND APPARATUS FOR DERIVING COMPOSITE TRACKS 审中-公开

    公开(公告)号：US20180199044A1

    公开(公告)日：2018-07-12

    申请号：US15865916

    申请日：2018-01-09

    Applicant: MEDIATEK INC.

    Inventor： Xin Wang ,  Wang Lin Lai ,  Lulin Chen ,  Shan Liu

    IPC: H04N19/169 ,  H04N19/167 ,  H04N19/70 ,  H04N19/136

    Abstract: Aspects of the disclosure provide a method and an apparatus for deriving composite tracks. The disclosed apparatus includes a processing circuitry. The processing circuitry is configured to generate a file that includes elementary track boxes respectively for elementary tracks. The elementary track box indexes a sequence of media samples in a time order that forms an elementary track. The processing circuitry is configured to construct a composite track box for a composite track. The composite track box identifies one or more elementary tracks, and a composite operation to form the composite track based on the one or more elementary tracks. The processing circuitry is further configured to generate a media presentation based on the composite track.

    Deriving and signaling a region or viewport in streaming media
    20.
    发明授权
    Deriving and signaling a region or viewport in streaming media 有权

    公开(公告)号：US11197040B2

    公开(公告)日：2021-12-07

    申请号：US15730851

    申请日：2017-10-12

    Applicant: MediaTek Inc.

    Inventor： Xin Wang ,  Wang Lin Lai ,  Lulin Chen ,  Shan Liu

    IPC: H04N21/4728 ,  H04N21/235 ,  H04N19/40 ,  G06T19/00 ,  H04N19/184 ,  H04N13/388 ,  H04N21/845 ,  H04N21/854 ,  H04N21/2343 ,  H04N21/2365

    Abstract: A method or system for supporting dynamic construction of a user selected sub-region (e.g., viewport or region of interest) from other sub-regions of a reference media presentation encodes reference media presentation as component tracks. A streaming decoder receives a streaming media file of the reference media presentation and displays an arbitrarily selected sub-region of the reference media presentation. The streaming media file has a derived track that (i) references one or more of the plurality of component tracks and (ii) specifies a set of operations for constructing media samples based on the media samples of the referenced component tracks. The streaming decoder provides media samples for the selected sub-region by retrieving the referenced component tracks and performing the set of operations specified by the derived track.

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