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    Opportunistic frame dropping for variable-frame-rate encoding
    1.
    发明授权
    Opportunistic frame dropping for variable-frame-rate encoding 有权

    公开(公告)号：US10368074B2

    公开(公告)日：2019-07-30

    申请号：US15074902

    申请日：2016-03-18

    申请人： Microsoft Technology Licensing, LLC

    发明人： Thomas W. Holcomb ,  Shyam Sadhwani ,  Bakkama Srinath Reddy

    IPC分类号： H04N19/146 ,  H04N19/132 ,  H04N19/172 ,  H04N19/137 ,  H04N19/58 ,  H04N19/176 ,  H04N19/142

    摘要： Innovations in opportunistic frame dropping for variable-frame-rate encoding of digital video are presented. In general, a computing system selectively drops a frame when the cost of encoding the frame (e.g., in terms of use of computational resources and/or power) is expected to outweigh the benefit of encoding the frame (e.g., in terms of better quality). For example, a frame dropping module detects whether there is significant change in a given frame relative to a control frame, which is a previous frame stored in a control frame buffer. If significant change is detected, the frame dropping module stores the given frame in the control frame buffer, thereby replacing the control frame, and passes the given frame to a video encoder. Otherwise, the frame dropping module drops the given frame without replacing the control frame in the control frame buffer and without passing the given frame to the video encoder.

    Adaptive panoramic video streaming using composite pictures
    3.
    发明授权
    Adaptive panoramic video streaming using composite pictures 有权

    公开(公告)号：US11483475B2

    公开(公告)日：2022-10-25

    申请号：US16935476

    申请日：2020-07-22

    申请人： Microsoft Technology Licensing, LLC

    发明人： Matthew Wozniak ,  Bakkama Srinath Reddy ,  Amr Martini

    IPC分类号： H04N5/232 ,  H04N19/184 ,  H04N19/33 ,  G06K9/00 ,  G06T11/00 ,  G06V20/40

    摘要： Innovations in stream configuration operations and playback operations for adaptive streaming of panoramic video are described. The innovations include features of adaptive streaming of panoramic video with composite pictures. For example, a stream configuration tool splits an input picture of panoramic video into multiple sections and creates multiple composite pictures. A composite picture includes one of the sections as well as a low-resolution version of the input picture. A playback tool reconstructs one or more composite pictures. Under normal operation, the playback tool can use the reconstructed section(s) of the composite picture(s) to render high-quality views of the panoramic video. If the view window dramatically changes, however, or if encoded data for a section is lost or corrupted, the playback tool can use the low-resolution version of the input picture to render lower-quality details for views of the panoramic video, without disruption of playback.

    Video bit stream decoding
    8.
    发明授权
    Video bit stream decoding 有权

    公开(公告)号：US10200707B2

    公开(公告)日：2019-02-05

    申请号：US14927127

    申请日：2015-10-29

    申请人： Microsoft Technology Licensing, LLC

    发明人： Yongjun Wu ,  Shyam Sadhwani ,  Bakkama Srinath Reddy

    IPC分类号： H04N19/44 ,  H04N19/423

    摘要： Aspects extend to methods, systems, and computer program products for video bit stream decoding. Aspects include flexible definition and detection of surface alignment requirements for decoding hardware. Surface alignment requirements can be handled by render cropping (e.g., cropping at a video output device), through adjustment and modification of original syntax values in a video bit stream and relaxed media type negotiation in a software (host) decoder. Resolution changes can be hidden with the aligned surface allocation when applicable. Performance can be improved and power consumption reduced by using hidden resolution changes.