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    Communication terminal device and communication method
    84.
    发明申请
    Communication terminal device and communication method 有权
    通讯终端设备及通讯方式

    公开(公告)号：US20010029595A1

    公开(公告)日：2001-10-11

    申请号：US09825200

    申请日：2001-04-02

    Applicant: MURATA KIKAI KABUSHIKI KAISHA

    Inventor： Yoshinori Murata

    IPC: H03M013/00 ,  G06F011/00 ,  G08C025/00

    CPC classification number: H04N1/3333 ,  H04N2201/3335 ,  H04N2201/33364

    Abstract: A communication terminal device (F) having an error correction function defined in ITU-T Recommendations T.30. The communication terminal device includes a modem (3) that can transmit data to a remote device in accordance with a plurality of modulation methods and communication speeds. A controller (1) associated with the terminal device (F) changes a current modulation method of the modem (3) to a different modulation method when an all-frame-error is detected predetermined times during data transmission. The controller (1), however, maintains the current modulation method and reduces a communication speed when a frame error other than the all-frame-error is detected prescribed times.

    Abstract translation: 具有在ITU-T建议书T.30中定义的纠错功能的通信终端装置（F）。 通信终端装置包括可以根据多种调制方式和通信速度向远程设备发送数据的调制解调器（3）。 当在数据传输期间检测到预定时间的全帧误差时，与终端设备（F）相关联的控制器（1）将调制解调器（3）的当前调制方法改变为不同的调制方法。 然而，当检测到所有帧错误以外的帧错误被规定的时间时，控制器（1）保持当前的调制方法并降低通信速度。

    Digital communication device
    85.
    发明授权
    Digital communication device 失效
    数字通讯装置

    公开(公告)号：US5818870A

    公开(公告)日：1998-10-06

    申请号：US748527

    申请日：1991-08-22

    Applicant: Tatsuya Yaguchi

    Inventor： Tatsuya Yaguchi

    IPC: H04N1/00 ,  H04N1/333 ,  H04Q11/04 ,  H04B1/38

    CPC classification number: H04N1/33338 ,  H04N1/001 ,  H04N1/33323 ,  H04N1/33346 ,  H04N1/33361 ,  H04N1/33369 ,  H04Q11/0471 ,  H04N2201/33357 ,  H04N2201/33364 ,  H04Q2213/033 ,  H04Q2213/034 ,  H04Q2213/16 ,  H04Q2213/178 ,  H04Q2213/179 ,  H04Q2213/199 ,  H04Q2213/297

    Abstract: A digital communication device of the present invention is provided with a modulation circuit for modulating a digital transmit signal, a first interpolater for converting the modulated signal in frequency, a coding circuit for coding the signal converted in frequency into an audio PCM transmission code with reference to a voice companding code table, a decoding circuit for decoding a coded audio PCM receive code into a digital signal with reference to the voice companding code table, a second interpolater for converting the decoded digital signal in frequency, and a demodulation circuit for demodulating the converted signal, and digitally performs modem modulation/demodulation and voice codec processing.

    Abstract translation: 本发明的数字通信装置具有用于调制数字发送信号的调制电路，用于转换频率调制信号的第一内插器，用于将频率转换的信号编码成参考的音频PCM传输码的编码电路 声音压缩码表，参考语音压缩码表将编码音频PCM接收码解码为数字信号的解码电路，用于对解码的数字信号进行频率转换的第二插值器和解调电路， 转换信号，并进行数字调制解调和语音编解码处理。

    Picture image communication apparatus
    86.
    发明授权
    Picture image communication apparatus 失效
    图像通信装置

    公开(公告)号：US5418625A

    公开(公告)日：1995-05-23

    申请号：US910918

    申请日：1992-07-09

    Applicant: Hiroyuki Shimoosawa

    Inventor： Hiroyuki Shimoosawa

    IPC: H04M11/00 ,  H04N1/00 ,  H04N1/327 ,  H04N1/333 ,  H04Q11/04 ,  H04N1/32

    CPC classification number: H04N1/32797 ,  H04N1/327 ,  H04N1/33323 ,  H04N1/33338 ,  H04N1/33361 ,  H04N1/33392 ,  H04Q11/0471 ,  H04N2201/33364 ,  H04Q2213/179 ,  H04Q2213/297 ,  H04Q2213/38

    Abstract: In a picture image communication apparatus having: an ISDN interface for communicating with an ISDN line; a PSTN interface for communicating with an PSTN line; and an ISDN supervisor responsive to the ISDN interface for detecting a status of the ISDN line, for transmitting a video signal indicative of a video image in G3 mode through either of the ISDN line and the PSTN line which is selected in accordance with a command signal, the improvement comprises: a controller for, in the absence of the command signal, judging the status in response to the ISDN supervisor; transmitting the video signal through the ISDN line using the ISDN interface when the status indicates that the ISDN line is usable; for transmitting the video signal through the PSTN line using the PSTN interface when the status indicates that the ISDN line is unusable. It may further comprises a scanner for scanning the video image and for producing the video signal. It may further comprises an interface for receiving the video signal externally.

    Abstract translation: 一种图像通信装置，具有：用于与ISDN线路进行通信的ISDN接口; 用于与PSTN线路通信的PSTN接口; 以及响应于ISDN接口检测ISDN线路的状态的ISDN主管，用于通过根据命令信号选择的ISDN线路和PSTN线路之一发送指示G3模式的视频图像的视频信号 改进包括：控制器，在没有命令信号的情况下，响应于ISDN主管判断状态; 当状态指示ISDN线路可用时，通过ISDN接口通过ISDN线路传输视频信号; 当状态指示ISDN线路不可用时，通过PSTN线路通过PSTN线路发送视频信号。 它还可以包括用于扫描视频图像并产生视频信号的扫描器。 它还可以包括用于从外部接收视频信号的接口。

    Facsimile apparatus
    87.
    发明授权
    Facsimile apparatus 失效

    公开(公告)号：US5189525A

    公开(公告)日：1993-02-23

    申请号：US524027

    申请日：1990-05-15

    Applicant: Takashi Kotani

    Inventor： Takashi Kotani

    IPC: H04N1/00 ,  H04N1/32 ,  H04N1/333 ,  H04Q11/04

    CPC classification number: H04N1/32797 ,  H04N1/33323 ,  H04N1/33338 ,  H04N1/33346 ,  H04N1/33353 ,  H04Q11/0471 ,  H04N2201/33364 ,  H04Q2213/179 ,  H04Q2213/198 ,  H04Q2213/204 ,  H04Q2213/297 ,  Y10S370/904

    Abstract: A facsimile apparatus is connected to an ISDN and is capable of transmission/reception. When a facsimile signal received from the ISDN is one sent to a non-ISDN facsimile apparatus, the facsimile signal received from the ISDN is converted into a non-ISDN facsimile signal and this signal is capable of being transmitted to the non-ISDN facsimile apparatus. Further, the facsimile apparatus is capable of being connected to a plurality of facsimile apparatus via an exchange, and a signal can be transmitted to a facsimile apparatus among the plurality thereof that is designated by a subaddress received from the ISDN. The facsimile apparatus is such that at the time of communication with a non-ISDN facsimile apparatus, communication is performed using the D channel of the ISDN, thereby raising the efficiency of ISDN utilization.

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