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1. 发明授权

US06452974B1 Synchronization of related audio and video streams 有权
标题翻译：相关音频和视频流的同步
公开(公告)号：US06452974B1
公开(公告)日：2002-09-17
申请号：US09705464
申请日：2000-11-02
申请人： Rama R. Menon , Sheng-Hui Chu , Yueheng Xu
发明人： Rama R. Menon , Sheng-Hui Chu , Yueheng Xu
IPC分类号： H04B504
CPC分类号： H04N5/93 , H04N5/04 , H04N5/91 , H04N7/147 , H04N7/152
摘要： A method and apparatus for synchronizing audio and video streams in a video conferencing system is provided. During a video conferencing session, audio and video streams are transmitted from one processing system to a remote processing system, where they are recorded. Because the video stream has a variable frame rate during transmission, extra frames are inserted into the recorded video stream in order to maintain a constant, predetermined frame rate. During playback, synchronization information from the audio stream is provided by an audio playback process to a video playback process in order to synchronize the start of playing the audio and video streams, as well as to repeatedly synchronize the audio and video streams during playback.
摘要翻译：提供了一种在视频会议系统中同步音频和视频流的方法和装置。在视频会议会话期间，音频和视频流从一个处理系统传输到远程处理系统，在那里它们被记录。因为视频流在传输期间具有可变的帧速率，所以额外的帧被插入到记录的视频流中，以便保持恒定的预定帧速率。在播放期间，来自音频流的同步信息通过音频播放处理提供给视频播放处理，以便同步播放音频和视频流的开始，以及在播放期间重复同步音频和视频流。

2. 发明授权

US06269122B1 Synchronization of related audio and video streams 失效
标题翻译：相关音频和视频流的同步
公开(公告)号：US06269122B1
公开(公告)日：2001-07-31
申请号：US09002543
申请日：1998-01-02
申请人： Rama R. Prasad , Sheng-Hui Chu , Yueheng Xu
发明人： Rama R. Prasad , Sheng-Hui Chu , Yueheng Xu
IPC分类号： H04N504
CPC分类号： H04N5/93 , H04N5/04 , H04N5/91 , H04N7/147 , H04N7/152
摘要： A method and apparatus for synchronizing audio and video streams in a video conferencing system is provided. During a video conferencing session, audio and video streams are transmitted from one processing system to a remote processing system, where they are recorded. Because the video stream has a variable frame rate during transmission, extra frames are inserted into the recorded video stream in order to maintain a constant, predetermined frame rate. During playback, synchronization information from the audio stream is provided by an audio playback process to a video playback process in order to synchronize the start of playing the audio and video streams, as well as to repeatedly synchronize the audio and video streams during playback.
摘要翻译：提供了一种在视频会议系统中同步音频和视频流的方法和装置。在视频会议会话期间，音频和视频流从一个处理系统传输到远程处理系统，在那里它们被记录。因为视频流在传输期间具有可变的帧速率，所以额外的帧被插入到记录的视频流中，以保持恒定的预定帧速率。在播放期间，来自音频流的同步信息通过音频播放处理提供给视频播放处理，以便同步播放音频和视频流的开始，以及在播放期间重复同步音频和视频流。

3. 发明申请

US20060135178A1 Wireless tracking system for personal items 失效
标题翻译：个人物品无线追踪系统
公开(公告)号：US20060135178A1
公开(公告)日：2006-06-22
申请号：US11025865
申请日：2004-12-21
申请人： James Allyn , John Miller , Sheng-Hui Chu
发明人： James Allyn , John Miller , Sheng-Hui Chu
IPC分类号： H04Q7/20
CPC分类号： G08B21/023 , G08B13/1427
摘要： A radio frequency transmission device including electronic circuitry. A digital logic circuit is alternate-able from a sleep mode to an active mode after a pre-determined time period, and back to the sleep mode immediately after transmission of a digital signal. The digital signal includes a unique and pre-determined sequence of fixed length pulses routed to a transmission circuit to transmit a radio signal in a specific frequency range. An output display signal from the output circuitry is displayed with an LED. An input circuitry is manually activated. A radio frequency signal is received with a receiver circuitry, sensed to determine if the received signal has a compatible characteristic of an expected signal. The radio frequency signal is converted into a digital form and sent to the microprocessor. Every associated transmitter device is tracked with a counter maintained by a microprocessor. Personnel, belongings and pets can be tracked with this device.
摘要翻译：一种包括电子电路的射频传输装置。数字逻辑电路在预定时间段之后从睡眠模式切换到活动模式，并且在数字信号传输之后立即返回睡眠模式。数字信号包括路由到传输电路以在特定频率范围内传输无线电信号的固定长度脉冲的唯一和预定序列。来自输出电路的输出显示信号用LED显示。手动启动输入电路。用接收机电路接收射频信号，被检测以确定接收到的信号是否具有预期信号的兼容特性。射频信号被转换为数字形式并发送到微处理器。每个相关联的发射机设备都由微处理器维护的计数器跟踪。人员，物品和宠物可以使用此设备进行跟踪。

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