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    • 3. 发明授权
    • Controlled simultaneous analog and digital communication
    • 同时控制的模拟和数字通信
    • US5537441A
    • 1996-07-16
    • US67519
    • 1993-06-14
    • Gordon BremerJoseph Q. ChapmanP. Michael HendersonKurt E. HolmquistKenneth D. KoRichard K. Smith
    • Gordon BremerJoseph Q. ChapmanP. Michael HendersonKurt E. HolmquistKenneth D. KoRichard K. Smith
    • H04J7/00H04L27/34H04L5/12
    • H04J7/00H04L27/3483
    • A method and apparatus for control of concurrent communication of analog information and digital information. In general terms, when the communication channel is viewed as a multi-dimensional space, the digital information signal is divided into symbols, and the symbols are mapped onto the signal space with a preset distance between them. The analog signal, generally limited in magnitude to less than half the distance separating the symbols, is converted to component signals and added (i.e., vector addition) to the symbols. The sum signal is then transmitted to the receiver where the symbols are detected and subtracted from the received signal to yield the analog signal components. The transmitted analog signal is recreated from those components. Both half-duplex and full-duplex operation is available in accordance with this invention. The illustrative embodiment includes a controller that is sensitive to input signals applied to the modem disclosed herein. To wit, the control is sensitive to signals from the analog port, signals from the digital port, and signals from the port that carries the combined digital and analog signals. Operation of the near-end modem is controlled as well as operation of the far-end modem.
    • 一种用于控制模拟信息和数字信息的并发通信的方法和装置。 一般来说,当通信信道被视为多维空间时,数字信息信号被划分为符号,并且符号以它们之间的预定距离映射到信号空间。 通常将模拟信号限制为小于分隔符号的距离的一半,被转换成分量信号并且相加(即矢量相加)到符号。 然后将和信号发送到接收机,其中检测符号并从接收信号中减去符号以产生模拟信号分量。 传输的模拟信号从这些组件重新创建。 根据本发明,半双工和全双工操作都可用。 说明性实施例包括对施加到本文公开的调制解调器的输入信号敏感的控制器。 就是说,这个控制对来自模拟端口的信号,来自数字端口的信号以及来自端口的信号都是敏感的,这些信号带有组合的数字和模拟信号。 近端调制解调器的操作受到远端调制解调器的操作和控制。
    • 10. 发明授权
    • Sketching unit for transmission of sketches and notes over normal
telephone lines
    • 用于通过普通电话线传送草图和笔记的草绘单元
    • US5915003A
    • 1999-06-22
    • US802976
    • 1997-02-20
    • Gordon BremerAhmad M. HassanJohn C. KrejciSusan J. SeamonKenneth David KoLuke J. SmithwickRichard Kent Smith
    • Gordon BremerAhmad M. HassanJohn C. KrejciSusan J. SeamonKenneth David KoLuke J. SmithwickRichard Kent Smith
    • A63F13/12H04J7/00H04L27/18H04L27/34H04M11/00H04M11/06H04N7/08H04N21/2368H04N21/2383H04N21/434H04N21/438
    • H04L27/32A63F13/12H04J7/00H04L27/186H04L27/3483H04M11/06H04N21/2383H04N21/4382H04N7/08
    • A sketching system sketches first notes to be transmitted over a telephone line receives second notes from another sketching system. The sketching system includes a signal de-combiner device, receiving the second notes from the another sketching system and voice data as a combined signal via the telephone line and de-combining the combined signal into the second notes and the voice data. In addition, the sketching system includes a sketching unit connected to the signal de-combiner. The sketching unit includes a note displaying device displaying the first and second notes, a note generating device generating the first notes, and a processor connected to the note displaying and generating devices and to the signal de-combiner, receiving the first notes from the note generating device, receiving the second notes to the note displaying device. The sketching unit further includes a clearing unit selectively clearing one of the note displaying device and another note displaying device of the another sketching system and an erase unit selectively erasing the first and second notes displayed on one of the note displaying device and the another note displaying device. Finally, the sketching system includes a first lock device selectively preventing the processor from transmitting the first notes to the signal de-combiner preventing the first notes from being displayed on the another sketching system, and a second lock device for selectively preventing the processor from transmitting the second notes to the note displaying device.
    • 草图系统草图通过电话线传输的第一个音符从另一个素描系统接收第二个音符。 该草图系统包括信号解组合装置,经由电话线接收来自另一草图系统的第二音符和语音数据作为组合信号,并将组合的信号解组合成第二音符和语音数据。 此外,草图系统包括连接到信号解组合器的草绘单元。 草图单元包括显示第一和第二音符的音符显示装置,产生第一音符的音符产生装置,以及连接到音符显示和产生装置的处理器以及信号解组合器,从音符中接收第一音符 生成装置,将第二音符接收到音符显示装置。 该草图单元还包括清理单元,其选择性地清除另一个素描系统中的一个音符显示设备和另一个音符显示设备;以及擦除单元,其选择性地擦除在音符显示设备之一上显示的第一和第二音符以及另一音符显示 设备。 最后,草图系统包括第一锁定装置,其选择性地防止处理器将第一音符发送到信号解组合器,以防止第一音符被显示在另一个素描系统上;第二锁定装置,用于选择性地防止处理器发送 笔记显示装置的第二个音符。