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公开(公告)号：EP0463790A3
公开(公告)日：1992-03-04
申请号：EP91305534.9
申请日：1991-06-19
发明人： Herz, William S.
摘要： A video synchronisation and frame pulse signal generator (10; 80; 90) generates a video synchronisation signal (36), such as a video black burst signal, and a video frame pulse signal (40) indicating the presence of a video signal frame. The generator (10; 80; 90) is self-contained and computer controllable and can be connected as a subsystem within an existing personal computer having an open architecture (e.g. as a plug-in interface board in a PC-AT (trade mark)). The video synchronisation signal (36) can be used as a master synchronisation signal source within a video signal processing system (e.g. an off-line video editing system). The video frame pulse signal (40) is synchronised to the video synchronisation signal (36) and can be selectively gated (22) under computer control to produce an interrupt signal useful as a stimulus for software interrupt routines of a computer within a video signal processing system. Computer controllable switches may be included for programmably selecting among additional video synchronisation and frame pulse signals (e.g. NTSC, PAL, SECAM or HDTV), which can be generated either internally or externally, the selected video synchronisation and frame pulse signals being used as the master synchronisation signal source and interrupt signal, respectively.
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公开(公告)号：EP0463790A2
公开(公告)日：1992-01-02
申请号：EP91305534.9
申请日：1991-06-19
发明人： Herz, William S.
摘要： A video synchronisation and frame pulse signal generator (10; 80; 90) generates a video synchronisation signal (36), such as a video black burst signal, and a video frame pulse signal (40) indicating the presence of a video signal frame. The generator (10; 80; 90) is self-contained and computer controllable and can be connected as a subsystem within an existing personal computer having an open architecture (e.g. as a plug-in interface board in a PC-AT (trade mark)). The video synchronisation signal (36) can be used as a master synchronisation signal source within a video signal processing system (e.g. an off-line video editing system). The video frame pulse signal (40) is synchronised to the video synchronisation signal (36) and can be selectively gated (22) under computer control to produce an interrupt signal useful as a stimulus for software interrupt routines of a computer within a video signal processing system. Computer controllable switches may be included for programmably selecting among additional video synchronisation and frame pulse signals (e.g. NTSC, PAL, SECAM or HDTV), which can be generated either internally or externally, the selected video synchronisation and frame pulse signals being used as the master synchronisation signal source and interrupt signal, respectively.
摘要翻译： 视频同步和帧脉冲信号发生器（10; 80; 90）产生视频同步信号（36），诸如视频黑burst信号，以及指示视频信号帧的存在的视频帧脉冲信号（40）。 发电机（10; 80; 90）是独立的并且是计算机可控的，并且可以作为子系统连接在具有开放架构的现有个人计算机内（例如，作为PC-AT（商标）中的插件接口板） ）。 视频同步信号（36）可以用作视频信号处理系统（例如离线视频编辑系统）内的主同步信号源。 视频帧脉冲信号（40）与视频同步信号（36）同步并且可以在计算机控制下选择性地选通（22），以产生一个中断信号，该中断信号可用作视频信号处理中计算机的软件中断程序的刺激 系统。 可以包括计算机可控开关，用于在可以在内部或外部生成的附加视频同步和帧脉冲信号（例如，NTSC，PAL，SECAM或HDTV）之间可编程选择所选择的视频同步和帧脉冲信号被用作主 同步信号源和中断信号。
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