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    ADAPTIVE PERTURBED CUBE MAP PROJECTION
    5.
    发明申请
    ADAPTIVE PERTURBED CUBE MAP PROJECTION 审中-公开

    公开(公告)号：US20180268517A1

    公开(公告)日：2018-09-20

    申请号：US15925681

    申请日：2018-03-19

    Applicant: QUALCOMM Incorporated

    Inventor： Muhammed COBAN ,  Geert VAN DER AUWERA ,  Marta KARCZEWICZ

    IPC: G06T3/00 ,  G06F17/17 ,  H04N19/172 ,  H04N19/174

    CPC classification number: G06T3/0087 ,  G06F17/17 ,  G06T3/0093 ,  G06T15/205 ,  G06T17/00 ,  G06T2207/10016 ,  H04N19/172 ,  H04N19/174 ,  H04N19/597 ,  H04N19/85

    Abstract: Methods and systems for processing video data are provided. For example, a video bitstream can be obtained that includes a video frame of a spherical representation of 360-degree video data. The video frame can include a planar surface of a geometry, and the planar surface can include a plurality of pixels. Three-dimensional coordinates of a target point of the spherical representation can be determined. A planar surface of the geometry to which the target point is to be mapped can also be determined. The planar surface can be determined based on the three-dimensional coordinates of the target point. Two-dimensional coordinates of a mapping location on the planar surface to which the target point is to be mapped can be determined based on the three-dimensional coordinates of the target point and an adaptation parameter. A pixel value can then be generated based on one or more pixels associated with the mapping location. The pixel value can be assigned to the target point.

    ADAPTIVE PERTURBED CUBE MAP PROJECTION
    6.
    发明申请
    ADAPTIVE PERTURBED CUBE MAP PROJECTION 审中-公开

    公开(公告)号：US20180268516A1

    公开(公告)日：2018-09-20

    申请号：US15925674

    申请日：2018-03-19

    Applicant: QUALCOMM Incorporated

    Inventor： Muhammed COBAN ,  Geert VAN DER AUWERA ,  Marta KARCZEWICZ

    IPC: G06T3/00 ,  G06F17/17 ,  H04N19/172 ,  H04N19/174

    CPC classification number: G06T3/0087 ,  G06F17/17 ,  G06T3/0093 ,  G06T15/205 ,  G06T17/00 ,  G06T2207/10016 ,  H04N19/172 ,  H04N19/174 ,  H04N19/597 ,  H04N19/85

    Abstract: Methods and systems for processing video data are provided. In one example, a first video bitstream can be obtained, which can include video frames of a spherical representation of 360-degree video data. Two-dimensional pixel coordinates of a pixel location of a planar surface of a geometry can be determined. The planar surface can be part of a plurality of planar surfaces of the geometry. Two-dimensional normalized coordinates can be determined for the pixel location based on an adaptation parameter and the two-dimensional pixel coordinates. Three-dimensional coordinates of a sample point of the spherical representation of the 360-degree video data can be determined based on the two-dimensional normalized coordinates. A pixel value for the pixel location of the planar surface of the geometry can be determined based on the sample point, and a second video bitstream can be generated that includes pixel values determined for pixel locations of the plurality of planar surfaces of the geometry.

    SYSTEMS AND METHODS OF SIGNALING OF REGIONS OF INTEREST
    7.
    发明申请
    SYSTEMS AND METHODS OF SIGNALING OF REGIONS OF INTEREST 审中-公开

    公开(公告)号：US20180160123A1

    公开(公告)日：2018-06-07

    申请号：US15828281

    申请日：2017-11-30

    Applicant: QUALCOMM Incorporated

    Inventor： Geert VAN DER AUWERA ,  Yekui WANG

    IPC: H04N19/167 ,  H04N19/513 ,  H04N19/17

    Abstract: Techniques and systems are provided for processing video data. In one example, a media file associated with 360-degree video data can be obtained. The 360-degree video data may include a spherical representation of a scene. The media file may include first signaling information and second signaling information of a viewport region corresponding to a region of interest (ROI) in the spherical representation. The first signaling information may include a center position and a dimension of the viewport region measured in a spherical space associated with the spherical representation. The second signaling information may indicate a region of a picture comprising the viewport region, the picture being formed by projecting the spherical representation including the ROI onto a plane. Pixels corresponding to the viewport region from the data of the picture can be extracted based on the first signaling information and second signaling information, and can be provided for rendering.

    ADJUSTING FIELD OF VIEW OF TRUNCATED SQUARE PYRAMID PROJECTION FOR 360-DEGREE VIDEO
    10.
    发明申请
    ADJUSTING FIELD OF VIEW OF TRUNCATED SQUARE PYRAMID PROJECTION FOR 360-DEGREE VIDEO 审中-公开

    公开(公告)号：US20180199029A1

    公开(公告)日：2018-07-12

    申请号：US15862468

    申请日：2018-01-04

    Applicant: QUALCOMM Incorporated

    Inventor： Geert VAN DER AUWERA ,  Muhammed COBAN

    IPC: H04N13/161 ,  H04N13/00

    CPC classification number: H04N13/363 ,  G06T3/00 ,  H04N5/2628 ,  H04N13/111 ,  H04N13/161

    Abstract: Techniques and systems are described for encoding 360-degree video data using the planes of a truncated square pyramid to map the 360-degree data for different fields of view. 360-degree video data can include multiple frames, where each frame includes spherical video data. In various implementations, a video coding system can select a field of view for the video data, and determine an offset from the center of the spherical video data that corresponds to the field of view. Using the offset, the system can determine a projection of the spherical video data onto the planes of the truncated square pyramid, where the base plane represents a front view and the top plane represents a back view. The system can then map the video data according to the projection such that each plane of the truncated square pyramid includes a portion of the spherical video data.

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