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    • 9. 发明授权
    • Communicating apparatus and program
    • 通讯设备和程序
    • US07400426B2
    • 2008-07-15
    • US10461481
    • 2003-06-16
    • Hitoshi Saito
    • Hitoshi Saito
    • B41F17/00H04N1/00
    • H04N1/3333H04N2201/3335
    • It is an object to provide a communicating apparatus and its program in which in the case where the RTC pattern or the RCP frame cannot be received due to the noises or in the case where a modem diverges and data cannot be normally demodulated, a procedure signal can be certainly detected, the modem can advance to a low-speed mode, and a possibility of a communication error can be remarkably reduced. During the image reception, both a carrier of V.21ch2 modulation and data signal quality (EQM) in a high-speed mode are, in parallel, monitored. When the data signal quality (EQM) deteriorates to a value larger than or equal to a predetermined threshold value and the carrier of the V.21ch2 modulation is detected, the modem advances to the low-speed mode and the procedure signal is received.
    • 本发明的目的是提供一种通信装置及其程序,其中在由于噪声而不能接收到RTC模式或RCP帧的情况下,或者在调制解调器发散并且数据不能正常解调的情况下,过程信号 可以肯定地检测到,调制解调器可以前进到低速模式,并且可以显着降低通信错误的可能性。 在图像接收期间,并行地监视V.21ch2调制的载波和高速模式的数据信号质量(EQM)。 当数据信号质量(EQM)恶化到大于或等于预定阈值的值并且检测到V.21ch2调制的载波时,调制解调器进入低速模式并且接收过程信号。