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    • 4. 发明授权
    • Image transmission apparatus
    • 图像传输装置
    • US4796301A
    • 1989-01-03
    • US799280
    • 1985-11-19
    • Shunichi UzawaTetsuzo MoriNoboru Koumura
    • Shunichi UzawaTetsuzo MoriNoboru Koumura
    • H04N1/32H04B9/00
    • H04N1/00488H04N1/0049H04N1/32609H04N1/32635H04N1/32657
    • An image transmission apparatus for light-signal image transmission is easy to install and relocate and ensures reliable transmission between a plurality of readers in remote locations and a central recorder. Each reader provides data signals and command signals for controlling the operation of the recorder from the quantized image data of an original. The amplified and frequency-modulated signals proceded by image or command header signals are transmitted to the recorder. A signal intensity from the reader may be discriminated to be above a minimum acceptable level before being recorded, with an indicator of a recorder provided to warn an operator of an unacceptable low level, thereby preventing low-quality recording; a recording state may be indicated to the operator by a lamp or a buzzer. The recorder may further have a transmission request register and a priority encoder for resolving a contention arising when two or more readers simultaneously request service, by generating and assigning priority codes to each reader. The priority codes may be either predetermined, for example, so as to give one reader emergency priority over all other readers, or may be arbitrarily set according to demand.
    • 用于光信号图像传输的图像传输装置易于安装和重定位,并确保远程位置的多个读取器和中央记录器之间的可靠传输。 每个读取器从原件的量化图像数据提供用于控制记录器的操作的数据信号和命令信号。 由图像或命令头信号处理的放大和调频信号被传送到记录器。 来自读取器的信号强度可以被识别为高于记录之前的最小可接受水平,其中提供了用于向操作者发出不可接受的低电平的记录器的指示器,从而防止低质量记录; 记录状态可以由灯或蜂鸣器指示给操作者。 记录器还可以具有传输请求寄存器和优先编码器,用于解决当两个或更多个读取器同时请求服务时产生的竞争,通过生成并向每个读取器分配优先权代码。 优先级代码可以是预先确定的,例如给予读者紧急优先于所有其他读取器,或者可以根据需要任意设置。