WO1998019444A1 - Equipement de transmission de donnees - Google Patents
Equipement de transmission de donnees Download PDFInfo
- Publication number
- WO1998019444A1 WO1998019444A1 PCT/JP1997/003905 JP9703905W WO9819444A1 WO 1998019444 A1 WO1998019444 A1 WO 1998019444A1 JP 9703905 W JP9703905 W JP 9703905W WO 9819444 A1 WO9819444 A1 WO 9819444A1
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- Prior art keywords
- communication
- procedure
- modem
- signal
- data
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
- H04N1/32789—Details of handshaking
- H04N1/32791—Arrangements for reducing the handshaking procedure or protocol time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/333—Mode signalling or mode changing; Handshaking therefor
- H04N1/33307—Mode signalling or mode changing; Handshaking therefor prior to start of transmission, input or output of the picture signal only
- H04N1/33323—Mode signalling or mode changing; Handshaking therefor prior to start of transmission, input or output of the picture signal only transmission mode only, e.g. speed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/333—Mode signalling or mode changing; Handshaking therefor
- H04N1/33338—Mode signalling or mode changing; Handshaking therefor adapting to particular facsimile group, e.g. G3
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/333—Mode signalling or mode changing; Handshaking therefor
- H04N1/33346—Mode signalling or mode changing; Handshaking therefor adapting to a particular standardised protocol
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/333—Mode signalling or mode changing; Handshaking therefor
- H04N1/33353—Mode signalling or mode changing; Handshaking therefor according to the available bandwidth used for a single communication, e.g. the number of ISDN channels used
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/333—Mode signalling or mode changing; Handshaking therefor
- H04N1/33369—Storage of mode or retrieval of prestored mode
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/333—Mode signalling or mode changing; Handshaking therefor
- H04N1/33376—Mode signalling or mode changing; Handshaking therefor according to characteristics or state of one of the communicating parties, e.g. available memory capacity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N2201/333—Mode signalling or mode changing; Handshaking therefor
- H04N2201/33307—Mode signalling or mode changing; Handshaking therefor of a particular mode
- H04N2201/33342—Mode signalling or mode changing; Handshaking therefor of a particular mode of transmission mode
- H04N2201/33364—Type of modulation; Type of channel, e.g. digital or analog; Type of communication, e.g. half-duplex or full-duplex
Definitions
- the present invention relates to a data communication device that reduces the time required for a pre-procedure performed prior to data communication using a modem, for example, facsimile communication.
- FIG. 13 is a control signal diagram of a pre-procedure of facsimile communication according to the related art.
- 13a is a communication procedure for selecting a modulation mode from among V34 half duplex, V34 full duplex, V17 half duplex and the like.
- 13b is a communication procedure for performing line probing to check the line and determine various parameters.
- 13c is the communication procedure for modem training.
- 13d is a communication procedure for setting the modem parameters.
- 13 e is a communication procedure for exchanging facsimile control signals.
- 13 f is the data communication procedure of the main channel.
- the upper side of the figure is the calling side sequence, the lower side is the called side sequence, and the sequence is from left to right. Goes on.
- communication procedure 13a for modulation mode selection after connecting the line, communication is performed with a modulation mode that allows the calling and called parties to communicate with each other using the V.21 modem (300 bp S , full-duplex). Select a protocol.
- a facsimile device using a V.34 modem select the V.34 modem as the modulation mode and facsimile communication as the communication protocol.
- the calling side transmits a line probing tone
- the called side receives and performs line inspection, and selects training parameters based on the above line inspection result. I do.
- the calling side transmits a training signal based on the above training parameters selected in the communication procedure 10b for line probing, and the called side receives the training signal It learns the filter coefficients of the adaptive equalizer for correcting the line characteristics and inspects the reception quality of the training signal.
- the calling party and the called party negotiate the modem parameters using full-duplex communication at 1,200 bps, and the modem parameters preset in the device and An optimum modem parameter is selected based on the result of the above-mentioned line inspection and the above-mentioned inspection of the reception quality of the traying signal.
- the communication procedure 13e of the facsimile control signal is a normal facsimile procedure, and negotiates the facsimile control signals NSF, CSI, DIS, TSI, DCS, CFR, and the like by 300 bps full-duplex communication.
- the image data is transmitted from the calling side and received by the called side by half-duplex communication from 2400 bps to 28.8 kbps.
- A4 paper 1 Image data can be transmitted in about 3 seconds per sheet.
- the above-mentioned modem communicates according to the above-mentioned training parameters selected in the communication procedure 13b of the communication line probing and the above-mentioned modem parameters selected in the communication procedure 10d of the modem parameter selection.
- communication is performed using the one filter coefficient learned in modem training 13b in order to correct the line characteristics. In this way, optimal data communication according to the line quality is performed.
- the present invention has been made in view of the above-described problems, and has as its object to provide a data communication device capable of shortening the time of a pre-communication procedure including the time for setting various parameters of a modem and for training a modem. .
- the data communication device of the present invention includes a communication means for performing a pre-communication procedure for exchanging a communication function with a communication destination and transmitting and receiving data, and stores a plurality of communication parameters corresponding to an identification number of the communication destination device.
- the communication destination device is a communication device registered in the storage device
- the communication device operates the communication device using the communication parameter read from the storage device and corresponding to the communication destination.
- the data communication is executed according to the shortening procedure, and the communication destination device is registered in the storage means. If the communication device is not a communication device, the communication device includes control means for operating the communication means using the communication parameters acquired in the communication procedure of the communication to execute data communication.
- a communication channel for selecting a modulation mode for example, a communication channel for selecting a modulation mode, a communication channel for performing line probing, a communication channel for modem training, a communication channel for setting a modem parameter
- the modulation mode, communication protocol, modem parameters, and the optimal training time of the modem, which are set by the four communication channels, are stored for each communication partner device, and subsequent communication is performed based on the stored information.
- control means determines whether or not the communication destination device is a communication device registered in the storage means, by the storage means in which the identification number of the communication partner and the communication parameters are stored. This is done based on whether the operation key that specifies the memory address of the switch has been pressed, or on the source identification information notified from the exchange.
- control means notifies the communication destination of the execution of the shortening procedure by transmitting an instruction signal of the same modulation scheme as that of the calling menu signal instead of the calling menu signal.
- FIG. 1 is a block diagram of a basic configuration of a facsimile apparatus to which a data communication apparatus according to a first embodiment of the present invention is applied,
- FIG. 2 is a functional configuration diagram of the digital signal processing unit (DSP) of the above embodiment
- FIG. 3 is an explanatory diagram showing a tone group of the line probing tone signal of the above embodiment
- FIG. 4 is a block diagram of the training receiving unit according to the embodiment.
- FIG. 5 is an explanatory diagram showing the calculation of the optimal training time according to the above embodiment.
- FIG. 6 is a memory configuration diagram of the shortened procedure registration memory according to the above embodiment.
- FIG. 7 is a flowchart showing a control operation at the time of transmission call of the embodiment
- FIG. 8 is a flowchart showing a control operation at the time of reception call of the embodiment
- FIG. 10 is a control signal diagram of the shortened procedure of the above embodiment,
- FIG. 11 is a flowchart showing a control operation when using the telephone number notification service of the data communication device according to the second embodiment of the present invention.
- FIG. 12 is a control signal diagram when using the telephone number notification service of the above embodiment.
- FIG. 13 is a control signal diagram showing a communication procedure of a conventional modem.
- FIG. 1 is a basic block diagram of a facsimile apparatus to which the present invention is applied.
- a reading unit 101 reads a document image, and a recording unit 102 records and outputs a received image.
- the control unit 103 controls the entire apparatus, and also controls the encoding and decoding of image signals and the execution of communication procedures.
- the modem 104 is a modem for implementing all the modulation and demodulation of the facsimile communication procedure specified in T.30 ANEXF of ITU-T.
- a digital signal processing unit (DSP) 104a that performs modem signal processing, It is configured with an analog front end (AFE) 104b that has both A / D conversion and DZA conversion functions.
- a line control unit (NCU) 105 controls dialing and calling for the line 106.
- the operation unit 107 includes various key input switches, such as a dial key and a start key, and a display for displaying information. The operation is performed by the operation unit 107.
- the memory 108 is a memory for storing various information for executing the shortening procedure when performing communication corresponding to a communication partner having the function of the shortening procedure.
- information such as a telephone number and a modem parameter is stored.
- the modem parameters To set the modem parameters, set the power suppression value indicating the signal power and the time value indicating the training time, as well as select the carrier from two types, high level and low level, and select the pre-emphasis filter. This is done by making various selections such as symbol speed selection, training constellation point selection, etc., which select and set five speeds to send to the eye pattern.
- DSP digital signal processing unit
- the modem control unit 201 interfaces with the control unit 103 and controls various modem functions.
- the modem control unit 201 has a plurality of functional units described below, and these are usually executed by software.
- the tonal transmission function unit 202 transmits various tonal signals according to the communication procedure.
- the tonal detection section 203 identifies a tonal signal transmitted from the communication partner.
- the V.21 modem 204 is a modem (300 bps, full-duplex) that conforms to 1/11 Recommendation 21.
- the I NFO modem 205 is a modem (600 bps, full-duplex) that communicates in an I NFO sequence in accordance with ITU-T Recommendation V.34, and starts communication and shortening procedures for line probing. Used in procedures.
- the control channel modem function unit 206 is a modem (1200 bps, full duplex) for the control channel specified in the ITU-T recommendation V.34, and sets the modem parameters for the main channel modem and performs facsimile communication. Communication of control signals Used in procedures.
- the main channel modem function unit 207 is a main channel modem (2400 bps to 28.8 kbps, half-duplex) defined in Recommendation 1 to 34. It is used for image data communication.
- the line probing transmission function unit 208 transmits a line probing tone defined in V.34.
- This line probing tone is a composite signal of 21 types of tonal signals from 150 Hz to 3750 Hz shown in FIG.
- the line probing receiving function unit 209 receives the line probing tone from the communication partner and performs a line test. Specifically, the line probing receiving unit 209 performs a spectrum analysis of the received signal by a fast Fourier transform algorithm, and selects an optimum symbol rate, carrier, and other information for the main channel modem 207. Select modem parameters.
- the training transmission function section 210 transmits the training signal of the V.34 modem, and the training signal section 211 receives the training signal from the communication partner and filters the adaptive equalizer for correcting the line distortion. Learn the coefficients.
- the demodulator 401 converts the training reception signal Sp subjected to AZD conversion in the analog front-end unit 104b from a passband to a complex baseband signal Yb.
- Adaptive equalizer 402 corrects the line distortion for baseband signal Yb and outputs received signal Yr.
- the determiner 403 determines and outputs a determination point Yd for determining the amount of deviation of the point of the received signal Yr on the key pattern.
- the subtractor 404 subtracts the determination point Yd from the received signal Yr and outputs an error signal Er. Note that Yb, Yr, Yd, and Er are complex signals. It is.
- the error signal Er is supplied to the adaptive equalizer 402, and the adaptive equalizer 402 learns internal filter coefficients so as to reduce the error signal Er.
- the coefficient is used as a reception filter coefficient of the main channel modem 207.
- the absolute value calculator 405 calculates the absolute value of the error signal Er.
- LPF 406 is a low-pass filter for smoothing the output signal Ea of the absolute value device 405.
- the output signal of the LPF 406 is an EQM signal indicating the degree of correction of the line distortion of the adaptive equalizer 402, and the smaller this EQM signal is, the more the correction of the line distortion is.
- the equalization capability analyzer 407 analyzes the correction capability of the adaptive equalizer 402 for the line distortion from the EQM signal. As shown in Fig. 5, the equalization capability analysis unit 407 observes the amount of change in the EQM signal from the start of training, and determines the time from when the absolute value of the amount of change becomes smaller than a certain value. Calculate as the optimal training time. The final value of the EQM signal is used as the noise power, and the ratio (SN) of the training signal power (absolute value of the point in the eye pattern from the origin) to the noise power (error of the point in the eye pattern) is calculated. The optimal training time is used as a training time in the shortening procedure, and the SN ratio is used for selecting a data transfer rate of the main channel modem 207. When the shortening procedure is performed, the calculation of the optimal training time is not performed.
- FIG. 6 is a flowchart showing a control operation of the facsimile apparatus according to the present embodiment at the time of calling transmission.
- step (hereinafter ST) 601 a call is started according to the transmission destination telephone number and transmission start instruction from the operation unit 107, and the transmission destination telephone number is registered in the abbreviated procedure.
- the memory 108 is searched to see if it has been registered. If not registered, the process proceeds to ST602 to make a dial call.
- facsimile communication is performed by a normal communication procedure based on T30 ANEXF of ITU-T.
- the transmitter performs normal communication and registers various parameters necessary for executing the shortening procedure.
- the contents to be registered in the abbreviated procedure include, for example, power suppression value and carrier selection information, optimal training time, nonlinear correction distortion correction value selection information, and the like. These are stored in the memory 108 according to the memory configuration of the shortened procedure registration memory shown in FIG.
- ST 609 it is determined whether there is a communication error, and if there is no communication error, the process proceeds to ST 610.
- the degree of data error is determined during communication, and if there are few data errors, the process ends. The determination of the error rate may be made based on, for example, the number of retransmissions in ECM.
- ST 611 if ST 609 determines that a communication error has occurred, and if ST 610 determines that there are many data errors, the shortening procedure registered for that transmission destination is The contents are erased from the memory 108 and the processing is terminated.
- the reason for executing the communication control procedure in accordance with various communication parameters stored in advance in association with the destination telephone number is based on the following considerations.
- the training time is set according to the learning time of the filter coefficient of the adaptive equalizer of the receiving device, but is usually set to a length that can be applied to all lines. ing. For this reason, when communication is performed through a line with good communication quality, the training time for the filter coefficient is shorter than the normal setting, and the training time may be wasted. Therefore, by executing the pre-communication procedure using the communication parameters stored in advance, the execution time of the pre-communication procedure was reduced.
- FIG. 8 is a flow chart showing a control operation of a pre-communication procedure at the time of reception of the facsimile apparatus of the present embodiment.
- Response Send the AN signal.
- the calling side while transmitting the ANS am signal, the calling side detects which of the following signals is received: the quick tonal signal (QTS) for instructing the start of the shortened procedure, or the calling menu signal CM.
- QTS quick tonal signal
- FIG. 9 is a control signal diagram of the communication procedure. After connecting the line, perform the communication procedure 9a for selecting the modulation mode, then perform the communication procedure 9b for the line probing, the communication procedure 9c for the modem training, the communication procedure 9d for the modem parameter setting, and the facsimile control signal. The pre-communication procedure is performed in the order of the communication procedure 9e, and then the data communication procedure 9f for transmitting image data is performed.
- the calling side transmits a calling station identification signal CNG, and the called side transmits a modified response tone signal AN Sam. Thereafter, the calling side transmits a calling menu signal CM indicating functions such as a modulation mode and a communication protocol of the calling side, and the called side determines a common function that can be communicated according to the received content of the CM. Send the indicated common menu signal JM.
- the calling party will After confirming the communication menu signal JM signal, after transmitting the CM terminator signal CJ, it transits to the communication procedure 9b of line probing.
- the called side also detects the CM terminator signal CJ while transmitting the common menu signal JM, and then transits to the communication procedure 9b of line probing.
- the CM, JM, and CJ are communicated by a V.21 modem 204 (300 bps, full duplex). Based on this exchange, for example, in a facsimile apparatus using a V.34 modem, the above-mentioned V.34 modem can be selected as the modulation mode, and the facsimile communication procedure can be selected as the communication protocol.
- the calling side transmits an INFOOC indicating communication capability such as a preset modulation speed and a carrier frequency of the V.34 modem, and line probing tones L1 and L2.
- the called side transmits I NFOO a indicating the communication capability set in advance and receives the line probing tone.
- the line probing tone is a composite signal of 21 kinds of tonal signals from 150 Hz to 3750 Hz shown in FIG.
- the called side receives the above line probing tone, performs spectrum analysis using the fast Fourier transform algorithm, and selects an optimal symbol rate, carrier selection and other modem parameters for the main channel modem 207.
- the called party selects a communicable training parameter from the contents selected above and the contents of INFO0c and INFOOOa, sets INFOOH, and transmits.
- the above INFOC, INFOOOa, and INFO0h are communicated by the INFO modem 205 (600 bps, full duplex) shown in FIG.
- the calling side tone B, i B 180 degree phase with respect to tone B
- the called side tone A, i A tone (180 degree phase for A)
- the caller sends training signals S, iS, PP, and TRN using the training parameters in the INFOOh sequence described above.
- the called side receives the training signal and learns the filter coefficient of the adaptive equalizer 402 for correcting the line characteristics.
- the equalizing capability analysis unit 407 also optimizes the training time and the noise power ratio. Calculate SN.
- the calling side and the called side transmit the procedure synchronization signals PPh and ALT, the modem parameter MPh relating to data communication, and the above-mentioned MPh confirmation signal E from the other party, and transmit the calling side. And the called party exchanges the above MPh.
- the above-mentioned MPh on the calling side is a modem parameter preset in the calling side modem
- the above-mentioned MPh on the called side is the modem parameter set in advance and the reception of the above line probing tone.
- the modem parameters selected from the SN calculated from the reception of the training signal.
- the communication procedure for setting the above-mentioned modem parameters is executed by using the control channel modem 206 (1200 bps, full-duplex modem) shown in FIG.
- the communication procedure 9e of the facsimile control signal will be described.
- the non-standard procedure signal NSF, the called terminal identification signal CSI, and the digital identification signal DIS are transmitted from the called side.
- the called side sets a flag indicating that the NSF field has the shortening procedure function, and sets and transmits the optimum training time calculated by the equalization capability analysis unit 407.
- the calling party's communication device After receiving the above NSF, CSI, and DIS, the calling party's communication device confirms that the called party has the shortened procedure function in the NSF, and then sends the transmitting station identification signal TSI and digital command signal DSC. Send. At that time, the calling communication device sets the abbreviated procedure registration flag, and sets various communication parameters exchanged in the current communication procedure. The data is stored in the memory 108 in association with the destination telephone number. After receiving the above TSI and DCS, the called side transmits a reception preparation confirmation CFR.
- the shortening procedure registration flag is not set on the calling side. Therefore, the communication procedure of the facsimile control signal in that case is executed using the control channel modem 206 (1200 bps, full-duplex modem) according to the usual V.34k procedure.
- the communication here is performed using modem parameters that are determined according to the training parameters of the above-mentioned INFO 0h sequence and the above-mentioned MPh and satisfy both the calling side and the called side.
- the calling side transmits the procedure synchronization signals S, iS, PP, and B1 of the main channel, and then transmits PIX (image data).
- the called side receives the above procedure synchronization signals S, i S, P P, B 1, and P IX (image data) that follows.
- the communication here is performed by the main channel modem 207 (1200 bps to 28.8 kbPs, half duplex).
- the reception of the called main channel modem 207 is learned by the adaptive equalizer 402 described above. It is configured to perform line distortion correction using the set filter coefficients.
- communication can be performed in about 3 seconds per A4 sheet.
- the communication procedure at the time of registration of the short procedure is performed according to the normal procedure as recommended by the ITU-T T30ANEXF. Further, by registering the shortening procedure in the memory 108 of the calling side apparatus, communication can be performed using the shortening procedure registered from the next communication.
- Fig. 10 is a control signal diagram of the communication procedure during the shortening procedure.
- the communication process up to data communication is shown.
- After connecting the line perform the communication procedure i 0 a to start the shortening procedure, and then use the normal communication procedure for the communication procedure 10b for modem training, the communication procedure 10c for setting the modem parameters, and the communication procedure 10 for the facsimile control signal.
- d perform data communication procedure 10 e for sending data (image data).
- the calling side transmits a calling station identification signal CNG, and the called side apparatus transmits a modified response tone signal AN Sam. After detecting the modified response tone signal AN S am signal, the calling side transmits the quick tonal signal QTS, detects the response signal tone A from the called side, and transmits tone 8, QI NFO. I do. After detecting the quick tonal signal QTS from the calling side, the called side transmits a tone A and receives the QINFO from the calling side.
- This quick tonal signal QTS is an instruction signal for transition to the shortening procedure.
- the quick tonal signal QTS has a repeating pattern of "001 1001 1001 1".
- the reason why such a tonal signal pattern is used is that the quick tonal signal QTS received by the receiver is converted into a signal pattern (“01 1 1 10”) of a flag sequence defined in ITU-T Recommendation T.30.
- the purpose is to make it possible to clearly identify the tonal signal pattern of the calling menu signal CM (2 start bits "10", data 8 bits, stop bit "1").
- the receiver side communicates depending on whether the incoming tonal signal is the quick tonal signal QTS or the calling menu signal CM. However, it can be easily identified in the same sequence whether communication is performed in the short procedure or in the normal procedure.
- the communication is According to the contents registered in the shortened procedure registration memory for each telephone number, that is, according to the training parameters (INFOOh), the optimal training time, and the nonlinear distortion correction selection at the time of the shortened procedure registration, the V.21 modem 204 (300 bps, full duplex).
- the training parameters INFOOh
- the optimal training time the optimal training time
- the nonlinear distortion correction selection at the time of the shortened procedure registration the V.21 modem 204 (300 bps, full duplex).
- the modem training between the transmitting device and the receiving device is executed according to the training parameter (INFOOOh) of the QI NFO sequence and the optimal training time.
- the calling side registers abbreviated procedures corresponding to the other party's telephone number at the time of dialing, but in the second embodiment, a call is transmitted by an exchange that has recently started service.
- the called party registers the modem parameters in association with the notified source telephone number.
- the receiver searches for the telephone number (ST 1102). If there is a corresponding telephone number (ST1103, ST1104), short procedure communication is performed (ST1105). If there is no corresponding telephone number, a normal communication procedure is performed (ST 1106).
- the above communication control procedure will be described with reference to a control signal diagram shown in FIG.
- the receiving device executes the communication procedure 12a.
- the receiving side device sends a QTS signal to the transmitting side to notify that the shortened communication procedure is to be performed.
- the subsequent procedure is the same as the procedure described above. That is, the communication procedure 12c for modem training, the communication procedure 12d for setting the modem parameters, the communication procedure 12e for the facsimile control signal, and the data communication procedure 12f are sequentially executed.
- the QTS signal and the QINF ⁇ for notifying the modem parameters and the like are different signals, but the information such as the modem parameters is included in the QTS signal to shorten the procedure time. Deformation is easy.
- either the transmitting device or the receiving device registered information such as the modem parameters, the optimal training time, and the modulation mode in the memory.
- both the transmitting device and the receiving device it is also possible for both the transmitting device and the receiving device to register the information in the memory. By doing so, after receiving the call, the transmitting device and the receiving device can omit the communication procedure 12a and start with the communication procedure 12b. In that case, the time of the pre-communication procedure is further reduced because there is no need to exchange such information in the communication procedure.
- a normal communication procedure for performing modulation mode selection, line probing, and modem training is performed, and the modem parameter selected at that time and the calculated optimal training time correspond to the other party's telephone number.
- the communication procedure for selecting the modulation mode and the communication procedure for line probing are omitted according to the stored modem parameters and the optimal training time in the subsequent communication, and the communication for modem training is performed with the optimal training time. Since the procedure can be performed, the time for the pre-procedure of communication can be greatly reduced without impairing the communication performance.
- the data communication apparatus of the present invention is a facsimile apparatus conforming to T30 ANEX F (so-called super G3), which has been recommended as a facsimile communication standard using an ITU-T recommendation V.34 modem (28.8 kbps). Are suitable for mutual communication.
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980705076A KR100339148B1 (ko) | 1996-10-30 | 1997-10-28 | 데이터통신장치및데이터통신방법 |
CA002241967A CA2241967C (en) | 1996-10-30 | 1997-10-28 | Data communication apparatus |
US09/077,290 US6426946B1 (en) | 1996-10-30 | 1997-10-28 | Data communication equipment |
DE69729372T DE69729372T2 (de) | 1996-10-30 | 1997-10-28 | Einrichtung zur datenübertragung |
EP97909653A EP0878950B1 (en) | 1996-10-30 | 1997-10-28 | Data communication equipment |
US10/163,609 US6917593B2 (en) | 1996-10-30 | 2002-06-07 | Data communication apparatus |
US10/193,096 US7260065B2 (en) | 1996-10-30 | 2002-07-12 | Data communication apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/287879 | 1996-10-30 | ||
JP08287879A JP3140381B2 (ja) | 1996-10-30 | 1996-10-30 | データ通信装置 |
Related Child Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/077,290 A-371-Of-International US6426946B1 (en) | 1996-10-30 | 1997-10-28 | Data communication equipment |
US09077290 A-371-Of-International | 1997-10-28 | ||
US10/164,014 Continuation US6831897B2 (en) | 1996-10-30 | 2002-06-07 | Data communication apparatus |
US10/163,609 Continuation US6917593B2 (en) | 1996-10-30 | 2002-06-07 | Data communication apparatus |
US10/193,096 Continuation US7260065B2 (en) | 1996-10-30 | 2002-07-12 | Data communication apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998019444A1 true WO1998019444A1 (fr) | 1998-05-07 |
Family
ID=17722921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/003905 WO1998019444A1 (fr) | 1996-10-30 | 1997-10-28 | Equipement de transmission de donnees |
Country Status (8)
Country | Link |
---|---|
US (4) | US6426946B1 (ja) |
EP (1) | EP0878950B1 (ja) |
JP (1) | JP3140381B2 (ja) |
KR (1) | KR100339148B1 (ja) |
CN (1) | CN100359910C (ja) |
CA (1) | CA2241967C (ja) |
DE (1) | DE69729372T2 (ja) |
WO (1) | WO1998019444A1 (ja) |
Cited By (1)
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EP0973323A4 (en) * | 1997-11-05 | 2003-01-15 | Matsushita Graphic Communic | DATA COMMUNICATION DEVICE AND DATA COMMUNICATION METHOD |
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- 1996-10-30 JP JP08287879A patent/JP3140381B2/ja not_active Expired - Lifetime
-
1997
- 1997-10-28 EP EP97909653A patent/EP0878950B1/en not_active Expired - Lifetime
- 1997-10-28 CN CNB971915113A patent/CN100359910C/zh not_active Expired - Fee Related
- 1997-10-28 KR KR1019980705076A patent/KR100339148B1/ko not_active IP Right Cessation
- 1997-10-28 WO PCT/JP1997/003905 patent/WO1998019444A1/ja active IP Right Grant
- 1997-10-28 US US09/077,290 patent/US6426946B1/en not_active Expired - Fee Related
- 1997-10-28 DE DE69729372T patent/DE69729372T2/de not_active Expired - Lifetime
- 1997-10-28 CA CA002241967A patent/CA2241967C/en not_active Expired - Fee Related
-
2002
- 2002-06-07 US US10/163,609 patent/US6917593B2/en not_active Expired - Lifetime
- 2002-06-07 US US10/164,014 patent/US6831897B2/en not_active Expired - Fee Related
- 2002-07-12 US US10/193,096 patent/US7260065B2/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
US20020154657A1 (en) | 2002-10-24 |
DE69729372T2 (de) | 2004-10-14 |
US20020186709A1 (en) | 2002-12-12 |
CA2241967C (en) | 2001-07-31 |
CA2241967A1 (en) | 1998-05-07 |
DE69729372D1 (de) | 2004-07-08 |
EP0878950B1 (en) | 2004-06-02 |
CN100359910C (zh) | 2008-01-02 |
US6426946B1 (en) | 2002-07-30 |
JPH10136112A (ja) | 1998-05-22 |
JP3140381B2 (ja) | 2001-03-05 |
US20020150051A1 (en) | 2002-10-17 |
CN1206530A (zh) | 1999-01-27 |
US6831897B2 (en) | 2004-12-14 |
US6917593B2 (en) | 2005-07-12 |
US7260065B2 (en) | 2007-08-21 |
KR19990076948A (ko) | 1999-10-25 |
KR100339148B1 (ko) | 2002-07-18 |
EP0878950A1 (en) | 1998-11-18 |
EP0878950A4 (en) | 2001-08-08 |
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