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    Encoding and decoding methods for use in facsimile
    1.
    发明授权
    Encoding and decoding methods for use in facsimile 失效
    用于传真的编码和解码方法

    公开(公告)号：US5587798A

    公开(公告)日：1996-12-24

    申请号：US556571

    申请日：1995-11-13

    申请人： Kazuo Kurita ,  Mikio Mizutani ,  Nobuhiko Noma ,  Tsukasa Sakai ,  Osamu Noguchi ,  Hiroyuki Nemoto ,  Keiichi Tomita

    发明人： Kazuo Kurita ,  Mikio Mizutani ,  Nobuhiko Noma ,  Tsukasa Sakai ,  Osamu Noguchi ,  Hiroyuki Nemoto ,  Keiichi Tomita

    IPC分类号： H03M7/46 ,  G06T9/00 ,  H04N1/417 ,  H04N1/419 ,  H04N1/32

    CPC分类号： G06T9/005 ,  H04N1/419

    摘要： An encoding (or decoding) method, by which raw data of 1 line is converted into, for example, modified Huffman (MH) code (or MH code is converted into raw data) by obtaining a cumulative run-length code every transition point, at which there occurs a transition or change between a run of white pixels to another contiguous run of black pixels, from the beginning of the line and then converting the cumulative run-length code to the MH code (or converting the MH code to the cumulative run-length code). The cumulative run-length code is defined by both of data, which indicates that a pixel of a run just prior to the transition point is black or white, and data representing a cumulative run-length of the run up to the pixel thereof just prior to the transition point. Thus, an encoding or decoding processing can be performed at a high speed.

    摘要翻译： 通过每转换点获得累积游程长度码，将1行的原始数据通过其转换为例如修改的霍夫曼（MH）码（或MH码被转换为原始数据）的编码（或解码） 在该处开始，从行的开始处发生白色像素与另一连续黑色像素的运行之间的转变或变化，然后将累积游程长度代码转换为MH代码（或将MH代码转换为累积的 游程长度代码）。 累积游程长度代码由两个数据定义，这两个数据表示恰好在转换点之前的运行像素是黑色或白色，以及表示直到其前一个像素的运行的累积运行长度的数据 到过渡点。 因此，可以高速执行编码或解码处理。

    Viterbi decoding method
    2.
    发明授权
    Viterbi decoding method 失效
    维特比解码方法

    公开(公告)号：US5379306A

    公开(公告)日：1995-01-03

    申请号：US935936

    申请日：1992-08-27

    申请人： Nobuhiko Noma ,  Mikio Mizutani ,  Tsukasa Sakai ,  Kazuo Kurita ,  Osamu Noguchi ,  Hiroyuki Nemoto ,  Keiichi Tomita

    发明人： Nobuhiko Noma ,  Mikio Mizutani ,  Tsukasa Sakai ,  Kazuo Kurita ,  Osamu Noguchi ,  Hiroyuki Nemoto ,  Keiichi Tomita

    IPC分类号： H04N1/41 ,  H03M13/23 ,  H03M13/41 ,  G06F11/00

    CPC分类号： H03M13/3961 ,  H03M13/41 ,  H03M13/4169

    摘要： A Viterbi decoding method, in which consecutive input data bits Q.sub.6n .about.Q.sub.1n are first converted into consecutive code bits Q.sub.6n .about.Q.sub.3n Y.sub.2n Y.sub.1n Y.sub.0n at a time instant n by use of a Trellis encoder. Then, a branch metric, which is a minimum Euclidean distance between a reception signal point and each of signal points (namely, Trellis codes Q.sub.6 .about.Q.sub.3 Y.sub.2 Y.sub.1 Y.sub.0) in a signal space diagram, corresponding to each of eight states 0 to 7 and a corresponding signal point are obtained. Further, a sum of the branch metric corresponding to each state and a corresponding path metric at a time instant (n-1), which is a sum of corresponding branch metrics since a time instant 1 to the time instant (n-1) is calculated. Then, the path metric corresponding to each state is updated by replacing it with the calculated sum of the corresponding branch metric and the corresponding path metric obtained at the time instant (n-1). Subsequently, a minimum one of the path metrics is determined as the latest part of a surviving path. Moreover, the surviving path is traced back to a signal point Q.sub.61 .about.Q.sub.31 Y.sub.21 Y.sub.11 Y.sub.01 at the time instant 1. Thus input data bits Q.sub.61 .about.Q.sub.31 Q.sub.21 Q.sub.11 at the time instant 1 is restored. In case of this method, the signal points are classified according to three bits Y.sub.21 Y.sub.11 Y.sub.01 into eight groups. Further, one of the groups is determined as a reference group. Furthermore, tables representing the signal points of the other groups are calculated from a table representing the signal points of the reference group.

    摘要翻译： 维特比解码方法，其中连续输入数据位Q6n DIFFERENCE Q1n首先通过使用网格编码器在时刻n被转换为连续的码位Q6n DIFFERENCE Q3nY2nY1nY0n。 然后，分支量度是信号空间图中的接收信号点与信号点之间的每个信号点（即，格子码Q6 DIFFERENCE Q3Y2Y1Y0）之间的最小欧几里德距离，对应于八个状态0至7中的每一个以及相应的信号 得到。 此外，从时刻1到时刻（n-1）之后的对应分支度量的和的时刻（n-1），对应于每个状态的分支度量和对应的路径度量的和是 计算。 然后，通过用计算出的相应分支量度的和和在时刻（n-1）获得的对应的路径度量来替换与每个状态对应的路径量度。 随后，将路径度量中的至少一个确定为幸存路径的最新部分。 此外，在时刻1追踪存活路径到信号点Q61差分Q31Y21Y11Y01。因此恢复在时刻1的输入数据位Q61差分Q31Q21Q11。 在这种方法的情况下，信号点根据三位Y21Y11Y01分为八组。 此外，其中一个组被确定为参考组。 此外，表示其他组的信号点的表由表示参考组的信号点的表计算。

    Modem apparatus, communication apparatus and communication control method
    3.
    发明授权
    Modem apparatus, communication apparatus and communication control method 失效
    调制解调器装置，通信装置和通信控制方法

    公开(公告)号：US06987801B2

    公开(公告)日：2006-01-17

    申请号：US09811609

    申请日：2001-03-20

    申请人： Nobuhiko Noma ,  Mikio Mizutani ,  Toshiyuki Ougi

    发明人： Nobuhiko Noma ,  Mikio Mizutani ,  Toshiyuki Ougi

    IPC分类号： H04B1/38 ,  H04L5/16

    CPC分类号： H04L27/2607 ,  H04L27/2666

    摘要： The present invention calculates a difference between present sampling data and sampling data one data unit ahead, cumulatively adds up difference values calculated for every sampling by going back to the time point ahead by the number of samples of a cyclic prefix signal inserted into an initializing signal and confirms the position of the cyclic prefix signal from the sample number for which this cumulative value indicates a minimum value.

    摘要翻译： 本发明根据前面的一个数据单元计算出当前采样数据和采样数据之间的差异，将插入到初始化信号中的循环前缀信号的样本数量累加回到前一时刻的每个采样计算出的差值 并从该累加值表示最小值的样本号确认循环前缀信号的位置。

    Modulator and demodulator (MODEM)
    6.
    发明授权
    Modulator and demodulator (MODEM) 失效
    调制解调器（MODEM）

    公开(公告)号：US06038252A

    公开(公告)日：2000-03-14

    申请号：US107796

    申请日：1998-06-30

    申请人： Mikio Mizutani ,  Nobuhiko Noma ,  Eizo Katayama ,  Genzo Takagi ,  Yoshihiko Noguchi ,  Mitsuhiro Araki

    发明人： Mikio Mizutani ,  Nobuhiko Noma ,  Eizo Katayama ,  Genzo Takagi ,  Yoshihiko Noguchi ,  Mitsuhiro Araki

    IPC分类号： H04N1/32 ,  H04B1/38 ,  H04L13/08 ,  H04L29/10 ,  H04M11/00 ,  H04M11/06

    CPC分类号： H04M11/06

    摘要： A MODEM can shorten the processing time of an interface disposed between a data terminal equipment (DTE) and the MODEM. The MODEM stores an object program of a procedure in a memory and switches an operational mode of the MODEM automatically corresponding to the prescribed procedure thereby executing the procedure corresponding to the current operational mode. The MODEM further comprises a timer which monitors the transits time between a completed procedure and the next procedure, and the MODEM starts the process of a specified operational mode based on a mode-setting-instruction of the procedure as well as monitoring the transitions time by using the timer, and executing a next specified operational mode when the timer times out, thereby allowing the MODEM to perform the various operational mode switches.

    摘要翻译： 调制解调器可以缩短数据终端设备（DTE）和调制解调器之间的接口处理时间。 MODEM将过程的对象程序存储在存储器中，并根据规定的过程自动切换MODEM的操作模式，从而执行与当前操作模式对应的过程。 MODEM还包括定时器，其监视完成的过程和下一个过程之间的转换时间，并且MODEM基于过程的模式设置指令启动指定操作模式的处理，并且通过 使用定时器，并且当定时器超时时执行下一个指定的操作模式，从而允许MODEM执行各种操作模式切换。

    Communication System
    9.
    发明申请
    Communication System 审中-公开
    通讯系统

    公开(公告)号：US20070226490A1

    公开(公告)日：2007-09-27

    申请号：US11596574

    申请日：2005-05-13

    申请人： So Odawara ,  Takao Nishiyama ,  Takayuki Segawa ,  Manabu Nakamura ,  Masahiro Matsunaga ,  Yuji Hashimoto ,  Mikio Mizutani

    发明人： So Odawara ,  Takao Nishiyama ,  Takayuki Segawa ,  Manabu Nakamura ,  Masahiro Matsunaga ,  Yuji Hashimoto ,  Mikio Mizutani

    IPC分类号： H04L9/32

    CPC分类号： H04L63/08 ,  H04L12/56 ,  H04W12/06

    摘要： A communication system for allowing communications as of Internet and the like to be universally used without restricting a second user to use communication and further without requiring any significant capital investment. According to this communication system, when a terminal (104) becomes able to communicate with a network usage terminal (101) and is about to use the Internet via the network usage terminal (101), it transmits the authentication information of its user (B), and the network usage terminal (101) then transmits the authentication information of its owner (A) and the received authentication information of the user (B) to an authentication server (105). If a result of authentication is OK, the network usage terminal (101) relays the communication of the terminal (104) to the Internet (103), thereby permitting the terminal (104) to use the Internet.

    摘要翻译： 用于允许互联网等通信的通信系统被普遍使用，而不限制第二用户使用通信，并且进一步而不需要任何大量的资本投资。 根据该通信系统，当终端（104）能够与网络使用终端（101）进行通信并且即将经由网络使用终端（101）使用因特网时，其发送其用户的认证信息（B ），网络使用终端（101）然后将其所有者（A）的认证信息和接收到的用户（B）的认证信息发送给认证服务器（105）。 如果认证的结果为OK，则网络使用终端（101）将终端（104）的通信中继到因特网（103），从而允许终端（104）使用因特网。

    Logarithmically linearly controlled variable gain amplifier
    10.
    发明授权
    Logarithmically linearly controlled variable gain amplifier 失效
    对数线性控制可变增益放大器

    公开(公告)号：US4628276A

    公开(公告)日：1986-12-09

    申请号：US682596

    申请日：1984-12-14

    申请人： Mikio Mizutani

    发明人： Mikio Mizutani

    IPC分类号： H03F3/45 ,  H03G3/00 ,  H03G7/00 ,  H03G3/20

    CPC分类号： H03G3/00 ,  H03F3/45475 ,  H03G3/001 ,  H03G7/005

    摘要： A variable gain amplifier of the logarithmically linear type comprises a divider for dividing a signal applied to the input terminal of the amplifier by a gain control signal. The output of the divider is applied to a first input of a subtractor, the second input of the subtractor being connected to receive the signal applied to the amplifier's input terminal to deliver a signal to the output terminal of the amplifier. The amplifier has an input-to-output characteristic given by (2.sup.n /x)-1 which is approximated to exp{2-x/(2.sup.n-2)}, where x represents the gain control signal.

    摘要翻译： 对数线性类型的可变增益放大器包括用于通过增益控制信号分频施加到放大器的输入端的信号的分频器。 分频器的输出被施加到减法器的第一输入，减法器的第二输入被连接以接收施加到放大器的输入端的信号，以将信号传送到放大器的输出端。 放大器具有由（2n / x）-1给出的输入到输出特性，其近似于exp {2-x /（2n-2）}，其中x表示增益控制信号。