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    • 4. 发明授权
    • Delay equalization detector
    • 延迟均衡检测器
    • US5105439A
    • 1992-04-14
    • US392689
    • 1989-08-11
    • Richard L. BennettVenkat Narayanan
    • Richard L. BennettVenkat Narayanan
    • H04H20/67
    • H04H20/67
    • An improved method for detecting that a facility delay has changed is provided. According to the invention, a facility having a delay that may change is coupled to a transmitter and a receiver. The transmitter is coupled to a first clock that transmits a first signal based on its current reading (the first clock signal) from time to time to the receiver via the facility. The receiver is coupled to a second clock that generates a second signal based on its current reading (the second clock signal) responsive to receiving the first clock signal. In operation, the first clock signal is fed downstream (via the facility having the delay), thereby triggering the second clock signal. The two clock signals are then detected and the difference in the two clock readings computed, thereby forming .DELTA..sub.n. The process is then repeated for successive first and second clock signals, thereby forming .DELTA..sub.n+1. The absolute value of .DELTA..sub.n -.DELTA..sub.n+a is then compared with a predetermined value to determine whether the facility time delay has changed. This method is particularly useful in simulcast broadcast systems.
    • 提供了一种用于检测设施延迟已经改变的改进方法。 根据本发明,具有可能改变的延迟的设施被耦合到发射机和接收机。 发射机耦合到第一时钟,该第一时钟基于其当前读取(第一时钟信号),经由设施不时向接收器发送第一信号。 接收器耦合到第二时钟,其响应于接收到第一时钟信号而基于其当前读数(第二时钟信号)产生第二信号。 在操作中,第一时钟信号被馈送到下游(经由具有延迟的设施),从而触发第二时钟信号。 然后检测两个时钟信号,并计算两个时钟读数的差值,从而形成DELTA n。 然后对连续的第一和第二时钟信号重复该过程,从而形成DELTA n + 1。 然后将DELTA n-DELTA n + a的绝对值与预定值进行比较,以确定设施时间延迟是否改变。 这种方法在联播广播系统中特别有用。
    • 6. 发明授权
    • Method and apparatus for synchronizing simulcast systems
    • 用于同步联播系统的方法和装置
    • US5201061A
    • 1993-04-06
    • US556158
    • 1990-07-23
    • Steven J. GoldbergVenkat Narayanan
    • Steven J. GoldbergVenkat Narayanan
    • G08B5/22H04B1/00H04H20/67
    • H04H20/67
    • A method for measuring a time delay between a controller (302) and a plurality of base sites (306) in a simulcast system (300). The method begins with the controller (302) transmitting a synchronization signal to a selected base site (306A) and to a delay measurement device (316). Upon receipt of the synchronization signal by the selected base site (306A), the selected base site (306A) transmits a signal to the delay measurement device (316). The delay measurement device (316) determines the time between the receptions of the synchronization signal transmitted by the controller and the signal transmitted by selected base site (306A). The delay measurement device (316) transmits the delay time determined between the receptions of the synchronization signal transmitted by the controller and the signal transmitted by the selected base sites (306A) to the controller (302) which programs the base sites (306) to delay transmissions of the RF signals in response to the measured delay time.
    • 一种用于测量在同时播送系统(300)中的控制器(302)和多个基站(306)之间的时间延迟的方法。 该方法开始于控制器(302)将同步信号发送到所选择的基站(306A)和延迟测量设备(316)。 所选择的基站(306A)接收到同步信号后,所选择的基地址(306A)向延迟测量装置发送信号(316)。 延迟测量装置(316)确定由控制器发送的同步信号的接收与所选择的基站(306A)发送的信号之间的时间。 延迟测量装置(316)将由控制器发送的同步信号的接收和由所选择的基站(306A)发送的信号之间确定的延迟时间发送到将基站(306)编程的控制器(302) 响应于所测量的延迟时间延迟RF信号的传输。
    • 10. 发明申请
    • Automatic collision triggered video system
    • 自动碰撞触发视频系统
    • US20050185052A1
    • 2005-08-25
    • US10786635
    • 2004-02-25
    • Vijay RaisinghaniVenkat Narayanan
    • Vijay RaisinghaniVenkat Narayanan
    • H04N7/18
    • H04N7/183
    • A video recording system is responsive to an automotive controls system. The video recording system includes a video camera, capable of capturing either still photos or video footage. The video camera may be integral to the interior of a vehicle, for example in a navigation unit, or may be coupled to a detachable electronic device like a cellular telephone. The video recording system communicates with the controls system by either hard wire link or wireless link. The controls system includes one or more sensors capable of detecting when a collision has occurred. One such sensor is an airbag deployment sensor. When the controls system detects that a collision has occurred, it sends an actuation signal to the video recording system, thereby causing the video recording system to begin capturing either photos or video footage. This video footage may then be stored locally or transmitted to a remote server. In one application, the video footage may be used by emergency personnel to determine the conditions inside the vehicle immediately following an accident.
    • 视频记录系统响应于汽车控制系统。 视频记录系统包括摄像机,能够拍摄静止照片或录像。 摄像机可以与车辆的内部成一体,例如在导航单元中,或者可以耦合到诸如蜂窝电话的可拆卸电子设备。 视频记录系统通过硬线链路或无线链路与控制系统进行通信。 控制系统包括能够检测何时发生碰撞的一个或多个传感器。 一个这样的传感器是气囊展开传感器。 当控制系统检测到碰撞发生时,它向摄像系统发送一个致动信号,从而导致视频记录系统开始拍摄照片或视频。 然后,该视频片段可以本地存储或发送到远程服务器。 在一个应用中,视频片段可能被紧急人员用来确定车辆紧急事故后的状况。