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    Media File Format to Support Switching Between Multiple Timeline-Altered Media Streams
    5.
    发明申请
    Media File Format to Support Switching Between Multiple Timeline-Altered Media Streams 有权
    媒体文件格式以支持在多个时间轴改变的媒体流之间切换

    公开(公告)号：US20080071920A1

    公开(公告)日：2008-03-20

    申请号：US11945006

    申请日：2007-11-26

    申请人： Anoop Gupta ,  Nosakhare Omoigui ,  Li-Wei He

    发明人： Anoop Gupta ,  Nosakhare Omoigui ,  Li-Wei He

    IPC分类号： G06F15/16

    CPC分类号： H04L65/604 ,  H04N21/2335 ,  H04N21/23424 ,  H04N21/23439 ,  H04N21/44016 ,  H04N21/8456 ,  H04N21/85406 ,  H04N21/858 ,  Y10S707/99931

    摘要： Media content is streamed from a server computer to a client computer. A media file format is used to store data for multiple timeline-altered streams that provides support for switching between the different timeline-altered streams during their presentation. In one aspect, a user can switch between different timeline-altered streams. Upon receiving a user request to switch to a particular timeline-altered stream (the target stream), the client computer accesses a time code stream data object corresponding to the current data unit being presented. The time code stream data object identifies a primary stream presentation time corresponding to the data unit. The client then uses the primary stream presentation time to index into a table of mappings to byte offsets. The table provides a mapping of the primary stream presentation time to a corresponding byte offset of the target stream.

    摘要翻译： 媒体内容从服务器计算机流式传输到客户端计算机。 媒体文件格式用于存储多个时间轴变化流的数据，这些数据提供支持在不同的时间轴改变的流之间进行切换。 在一个方面，用户可以在不同的时间轴变化的流之间切换。 在接收到切换到特定时间线改变流（目标流）的用户请求时，客户端计算机访问与正在呈现的当前数据单元相对应的时间码流数据对象。 时间码流数据对象标识对应于数据单元的主流呈现时间。 然后，客户端使用主流呈现时间将其映射到字节偏移的映射表中。 该表提供主流呈现时间与目标流的相应字节偏移的映射。

    Media file format to support switching between multiple timeline-altered media streams
    6.
    发明授权
    Media file format to support switching between multiple timeline-altered media streams 失效
    媒体文件格式支持在多个时间轴更改的媒体流之间切换

    公开(公告)号：US07302490B1

    公开(公告)日：2007-11-27

    申请号：US09564297

    申请日：2000-05-03

    申请人： Anoop Gupta ,  Nosakhare D. Omoigui ,  Li-Wei He

    发明人： Anoop Gupta ,  Nosakhare D. Omoigui ,  Li-Wei He

    IPC分类号： G06F15/16 ,  H04N7/08

    CPC分类号： H04L65/604 ,  H04N21/2335 ,  H04N21/23424 ,  H04N21/23439 ,  H04N21/44016 ,  H04N21/8456 ,  H04N21/85406 ,  H04N21/858 ,  Y10S707/99931

    摘要： In a networked client/server system, media content is streamed from a server computer to a client computer. A media file format is used to store data for multiple timeline-altered streams that provides support for switching between the different timeline-altered streams during their presentation. According to one embodiment, a time code stream includes multiple data objects mapping corresponding timeline-altered stream data units to primary stream presentation times, and an index table mapping primary stream presentation times to timeline-altered stream byte offsets.

    摘要翻译： 在联网的客户端/服务器系统中，媒体内容从服务器计算机流式传输到客户端计算机。 媒体文件格式用于存储多个时间轴变化流的数据，这些数据提供支持在不同的时间轴改变的流之间进行切换。 根据一个实施例，时间码流包括将对应的时间线改变的流数据单元映射到主流呈现时间的多个数据对象，以及将主流呈现时间映射到时间线改变的流字节偏移的索引表。

    System and method for whiteboard and audio capture
    7.
    发明授权
    System and method for whiteboard and audio capture 有权
    用于白板和音频捕获的系统和方法

    公开(公告)号：US07260257B2

    公开(公告)日：2007-08-21

    申请号：US10178443

    申请日：2002-06-19

    申请人： Zhengyou Zhang ,  Ross Cutler ,  Zicheng Liu ,  Anoop Gupta ,  Li-wei He

    发明人： Zhengyou Zhang ,  Ross Cutler ,  Zicheng Liu ,  Anoop Gupta ,  Li-wei He

    IPC分类号： C06K9/00

    CPC分类号： G06F17/30843 ,  G06Q10/1095 ,  G11B27/105 ,  G11B27/28 ,  G11B27/34 ,  H04N5/77 ,  H04N9/806

    摘要： A system that captures both whiteboard content and audio signals of a meeting using a digital camera and a microphone. The system can be retrofit to any existing whiteboard. It computes the time stamps of pen strokes on the whiteboard by analyzing the sequence of captured snapshots. It also automatically produces a set of key frames representing all the written content on the whiteboard before each erasure. The whiteboard content serves as a visual index to efficiently browse the audio meeting. The system not only captures the whiteboard content, but also helps the users to view and manage the captured meeting content efficiently and securely.

    摘要翻译： 使用数码相机和麦克风捕获会议的白板内容和音频信号的系统。 该系统可以改装任何现有的白板。 它通过分析捕获的快照的顺序来计算白板上笔划的时间戳。 它也会在每次擦除之前自动产生代表白板上所有写入内容的一组关键帧。 白板内容作为视觉索引，有效地浏览音频会议。 该系统不仅可以捕获白板内容，还可以帮助用户有效，安全地查看和管理所捕获的会议内容。

    Multi-Level Skimming of Multimedia Content Using Playlists
    8.
    发明申请
    Multi-Level Skimming of Multimedia Content Using Playlists 有权
    使用播放列表对多媒体内容进行多级翻译

    公开(公告)号：US20060147018A1

    公开(公告)日：2006-07-06

    申请号：US11276424

    申请日：2006-02-28

    申请人： Anoop Gupta ,  Li-Wei He ,  Nosakhare Omoigui

    发明人： Anoop Gupta ,  Li-Wei He ,  Nosakhare Omoigui

    IPC分类号： H04M3/42

    CPC分类号： G06F17/30053 ,  G06F17/30017 ,  G11B27/105 ,  G11B27/34 ,  H04N7/17318 ,  H04N21/23439 ,  H04N21/26258 ,  H04N21/4621 ,  H04N21/4825 ,  H04N21/6377 ,  H04N21/658 ,  H04N21/6587 ,  H04N21/8455 ,  H04N21/8456 ,  H04N21/8549

    摘要： A skimmed or preview version of multimedia content is provided to a client computer by a server computer using playlists. The skimmed version of multimedia content can be presented to a user of a client computer in less time than presenting the entire multimedia content would require. The server computer maintains skimming information that identifies particular segments of the multimedia content corresponding to the skimmed version. The server computer uses the skimming information to generate a playlist, which in turn is used by the server computer to access the appropriate segments of the multimedia content and provide the segments to the client computer.

    摘要翻译： 由服务器计算机使用播放列表向客户端计算机提供多媒体内容的撇去或预览版本。 可以在比呈现整个多媒体内容所需的时间更短的时间内将多媒体内容的撇掉版本呈现给客户端计算机的用户。 服务器计算机维护识别与撇去版本对应的多媒体内容的特定段的撇号信息。 服务器计算机使用撇号信息来生成播放列表，该播放列表又由服务器计算机使用以访问多媒体内容的适当段，并将该片段提供给客户端计算机。