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139 条记录 (耗时 0.026 秒)

    Apparatus and method for obtaining proper output signal in which gain and DC component are regulated based upon on measured amplitude distribution
    71.
    发明授权
    Apparatus and method for obtaining proper output signal in which gain and DC component are regulated based upon on measured amplitude distribution 失效
    基于测量的振幅分布，获得调节增益和直流分量的适当输出信号的装置和方法

    公开(公告)号：US5774085A

    公开(公告)日：1998-06-30

    申请号：US916718

    申请日：1997-08-18

    申请人： Yoshiyuki Yanagimoto ,  Mitsuhiro Nakamura

    发明人： Yoshiyuki Yanagimoto ,  Mitsuhiro Nakamura

    IPC分类号： H03G5/16 ,  H03F1/30 ,  H03F3/34 ,  H03G3/20 ,  H03G3/30 ,  H03H15/00 ,  H03H17/00 ,  H03H17/02 ,  H03H21/00 ,  H03M13/23 ,  H04B3/04 ,  H04L25/03 ,  H04L25/06 ,  H03G3/00

    CPC分类号： H03F1/30 ,  H03G3/30

    摘要： A circuit adjusts the gain, direct-current (DC) component, and transient response of input signals to provide suitable output signals for a connected signal processor. The circuit includes a gain and DC component control circuit, which controls the amplitude and DC offset level of an input signal; an A/D converter, which performs A/D conversion on the output of the gain and DC component control circuit; and an equalization filter, which is connected to the output of the A/D converter. The amplitude distribution of the output waveform of the equalization filter is measured, and the gain and DC component control circuit is controlled on the basis of said measured value, in order to assure that the output of the equalization filter is suitable for a connected signal processor.

    摘要翻译： 电路调整增益，直流（DC）分量和输入信号的瞬态响应，为连接的信号处理器提供合适的输出信号。 该电路包括增益和直流分量控制电路，其控制输入信号的振幅和直流偏移电平; A / D转换器，对增益和直流分量控制电路的输出执行A / D转换; 以及连接到A / D转换器的输出的均衡滤波器。 测量均衡滤波器的输出波形的幅度分布，并且基于所述测量值来控制增益和DC分量控制电路，以便确保均衡滤波器的输出适合于连接的信号处理器 。

    Communications system capable of communicating encrypted information
    73.
    发明授权
    Communications system capable of communicating encrypted information 失效
    能够通信加密信息的通信系统

    公开(公告)号：US5586185A

    公开(公告)日：1996-12-17

    申请号：US400904

    申请日：1995-03-08

    申请人： Koichi Shibata ,  Mitsuhiro Nakamura

    发明人： Koichi Shibata ,  Mitsuhiro Nakamura

    IPC分类号： H04L9/08 ,  H04L9/00

    CPC分类号： H04L9/0891

    摘要： A communications system for transmitting and receiving information encrypted by a cipher key to and from a remote communication apparatus includes a cipher key storage device for storing a cipher key table in which a plurality of cipher keys and their index numbers are registered and updated. A remote terminal data storage device stores a remote terminal data table including index numbers of the individual cipher keys registered in relation to predefined operation numbers. Input devices are provided for inputting the cipher keys, the index numbers, and the operation numbers. A registration mode setup device is provided for selectively activating a remote terminal data registration mode in which data is registered in the remote terminal data table or a cipher key registration mode in which data is registered in the cipher key table. A registration control device is provided for registering an index number in relation to an operation number in the remote terminal data registration mode and for registering a cipher number in relation to an index number in the cypher key registration mode. Control is provided for automatically switching to plaintext transmission or halting transmission and accepting encryption data when required encryption data is absent.

    摘要翻译： 用于通过密码密钥向远程通信装置发送和接收信息的通信系统包括：密码密钥存储装置，用于存储其中登记和更新多个密码密钥及其索引号的加密密钥表。 远程终端数据存储装置存储包括关于预定义的操作号登记的各个密码密钥的索引编号的远程终端数据表。 提供输入设备用于输入密码密钥，索引号和操作号。 提供了一种注册模式设置装置，用于选择性地激活其中数据被登记在远程终端数据表中的远程终端数据注册模式或其中数据被登记在密码密钥表中的密码登记模式。 提供了一种注册控制装置，用于登记与远程终端数据登记模式中的操作号相关的索引号，并且用于在密码密钥登记模式中登记相对于索引号的密码。 提供控制，用于在不需要加密数据时自动切换到明文传输或停止传输并接受加密数据。

    Encryption communication apparatus
    74.
    发明授权
    Encryption communication apparatus 失效
    加密通信装置

    公开(公告)号：US5535277A

    公开(公告)日：1996-07-09

    申请号：US399583

    申请日：1995-03-07

    申请人： Kohichi Shibata ,  Mitsuhiro Nakamura

    发明人： Kohichi Shibata ,  Mitsuhiro Nakamura

    IPC分类号： H04L9/00 ,  H04N1/44 ,  H04L9/28

    CPC分类号： H04L9/0656 ,  H04N1/4486

    摘要： An encryption communication apparatus of the present invention is embodied, for example, by a facsimile machine. A document original of plural pages set on the facsimile machine is read by a scanner section, and converted into image data on a page-by-page basis. A value N1 represents the second of the clock time at which the reading of each page of the document original is completed, and binary-coded data in an N1-th bit position counted from the front bit of each page of image data is inverted. Then, the image data is subjected to a predetermined encryption process, and transmitted in the form of facsimile signals via a communication line. Binary-coded data corresponding to a given pixel in the front portion (left upper portion) of the image data on each page of the document original is inverted. Therefore, even if a third party obtains the encrypted data corresponding to the front portion of the image data, decryption is very difficult and encryption security is ensured.

    摘要翻译： 本发明的加密通信装置例如由传真机体现。 在传真机上设置的多个页面的原稿由扫描仪部分读取，并逐页转换为图像数据。 值N1表示文件原稿的每页的读取完成的时钟时间的第二时间，并且从图像数据的每一页的前一位计数的第N1位位置中的二进制编码数据被反转。 然后，对图像数据进行预定的加密处理，并经由通信线路以传真信号的形式发送。 对应于文档原稿的每页上的图像数据的前部（左上部）中的给定像素的二进制编码数据被反转。 因此，即使第三方获得与图像数据的前部相对应的加密数据，解密也非常困难，并且确保了加密安全性。