JPH0342966A - Facsimile communication system - Google Patents

Abstract

PURPOSE:To quickly enter into an abbreviated protocol mode to shorten a protocol time furthermore by transmitting a specific CED signal from the reception side at the time of incoming of a call and transmitting an NSS signal dependent upon a high speed MODEM from the transmission side. CONSTITUTION:A facsimile equipment 11 on the reception side transmits the preliminarily set specific CED signal to set a timer T3. A facsimile equipment 11 on the transmission side transmit dummy data and EOL and NSS signals following MODEM training. The facsimile equipment outputs the EOL signal n-number of times without stopping the high speed MODEM after transmitting the NSS signal, and thereafter, it transmits picture information and outputs the EOL signal 6 times. When receiving the carrier of the high speed MODEM before expiration of the timer T3, the facsimile equipment 11 on the reception side receives dummy data, the NSS signal, and picture signal after MODEM training.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a facsimile communication system, and more particularly to a facsimile communication system in which communication time is shortened by shortening protocol time.

(Prior Art) In facsimile communication, predetermined facsimile control signals are exchanged based on the recommendations of CCITT (Consultative Committee for International Telegraph and Telephone), and facsimile communication procedures are executed to perform facsimile communication.

On the other hand, the futsujimori communication system has been rapidly progressing in recent years.
Image data transmission time has been significantly reduced. especially,
After the sending facsimile machine stores the image data read by the scanner in the image memory, it calls the other party,
In so-called memory transmission, in which the image data received by the fuzzier on the receiving side is stored in the image memory and then recorded on recording paper using a plotter, when there are few pages in the document, the protocol may be slower than the image data transmission time. There is a phenomenon that the time is getting longer.

Therefore, the present applicant has conventionally developed a facsimile communication system that shortens the protocol time.

In this facsimile communication system using the shortened protocol, as shown in Figure 11, when the sending facsimile device receives a CED signal from the receiving side, it transmits a specific NSS signal (9600 bps) indicating the shortened protocol mode and receives the signal. side is capable of reception using the shortened protocol, and C
When a FR (NSF) signal is sent, the sending facsimile machine performs communication using the shortened protocol mode. In other words, when the sending facsimile machine receives a CFR (NSF) signal, it
Perform ETRAIN (modem training) and then transmit image information (image data).
The F) signal consists of the FIF C facsimile information field (Facsimile information field) of the CFR signal containing the data of the NSF signal. Note that when the receiving facsimile device rejects communication in the shortened protocol mode and transmits a normal NSF signal, C3I signal, or Dis signal, the sending facsimile signal executes facsimile communication according to normal facsimile procedures.

(Problem to be Solved by the Invention) However, in such a conventional facsimile communication system, in order to perform facsimile communication using the shortened protocol, the sending side must request communication in the shortened protocol mode using an NSS signal. , on the other hand, the receiving side sends CF
Since the configuration was such that communication was affirmed in the shortened protocol mode using the R signal, the protocol time was still insufficiently shortened and there was room for improvement.

(Object of the Invention) Therefore, the present invention provides that the receiving side transmits a specific CED signal indicating a shortened protocol communication request as soon as there is an incoming call, and the transmitting side sends an NSS signal by a high-speed modem indicating an affirmation of shortened protocol communication. By sending the The purpose is to

(Structure of the Invention) In order to achieve the above object, the present invention provides a predetermined factor ξ
In the factor ξ-direction communication method in which factor ξ-direction communication is performed by exchanging factor ξ-direction control signals and performing factor ξ-direction communication procedure,
When a receiving facsimile machine receives a call, it sends out a specific CED signal, and when the sending facsimile machine receives the specific CED signal, it skips the normal facsimile procedure and sends an NSS signal using a high-speed modem. After that, the image data is transmitted, and when the receiving facsimile device receives the NSS signal from the high-speed modem, the image data is received by omitting the normal facsimile procedure.

Hereinafter, the present invention will be specifically explained based on examples.

1 to 10 are diagrams showing an embodiment of the present invention.

FIG. 1 is a block diagram of a facsimile device 1 applied to the facsimile communication system of the present invention.
Block 5, communication control section 6, network control section 7, image processing section 8
and an operation section 9.

A work area is formed in the memory 3, and a basic program for the facsimile device 1 and a shortened protocol communication program of the present invention are stored. It controls each part to execute the sequence as the factor ξ device 1, and also executes the shortened protocol communication process of the present invention.

As the scanner 4, 9, for example, CCD (ChargeC
The scanner 4 reads the image of the document and outputs it as image data (image information).

As the plotter 5, for example, a thermal recording device using a thermal element is used, and the plotter 5 records directly on thermal recording paper or indirectly on ordinary recording paper via an ink sheet.

During transmission/reception, the communication control unit 6 exchanges a factor ξ control signal with the other party's facsimile machine to set a predetermined factor ξ.
In particular, under the control of the system control unit 2, the facsimile communication procedure is executed using the shortened protocol of the present invention.

As shown in FIG. 2, the communication control unit 6 includes a shortened protocol function unit 11, which has a switching unit 12, a 2100Hz oscillation unit 13, a 165011
z oscillation section 14, distribution section 15.2100Hz detection section 16.
It is composed of a 1650Hz detection section 17, a carrier detection section 18, and the like. The shortened protocol function section 11 is connected to the network control section 7 via its switching section 12 and distribution section 15, and exchanges signals with the network control section 7.
The shortened protocol function unit 11 connects to the CPU (Central Process) of the communication control unit 6 via the boat 19.
ing Unit) 20, and the CPU 20
controls the switching unit 12, 210082 oscillation unit 13 and 1650H2 oscillation unit 14 via the boat 19, and also controls the special CED of the present invention by signals from the 2100Hz detection unit 16, 1650Hz detection unit 17 and carrier detection unit 18. Performs signal detection and carrier detection for high-speed modems. That is, the carrier detection section 18 includes, for example, a bandpass filter 21, an amplification section 22, and a waveform shaping section 23, as shown in FIG.
3 from the analog signal input from the network control unit 7 via
A signal in a band of 00 Hz to 3400 Hz is extracted by a band pass filter 21 and amplified by an amplifying section 22. The amplified signal is integrated by a waveform shaping section 23, then waveform shaped, and outputted to the CPU 20 via the boat 19. 2100H2
The detection unit 16 and the 1650H2 detection unit 17 are configured in the same manner as the carrier detection unit 18, and their bandpass filters extract 2100Hz or 16501(z), shape the waveform without integrating it, and output it to the CPU 20 via the boat 19. The CPU 20 includes a 2100Hz detection section 16, a 1650Hz detection section 17, and a carrier detection section 18.
A normal CED signal is a tone signal of 2100 Hz continuous for 2.6 seconds to 4 seconds, but the present invention The special CED signal of
As shown in the figure, 2100Hz (predetermined time 1+) and 1
650Hz (predetermined time tg) is a continuous signal,
The abbreviated protocol function unit 11 registers this special CED signal in advance in the memory 3 of the sending and receiving facsimile machines as a signal requesting communication in the abbreviated protocol mode.
It is detected by the 00Hz detection section 16 and the 1650Hz detection section 17, and the CPU 20 makes a judgment based on the detection results of the 2100H2 detection section 16 and the 1650Hz detection section 17. Also, 2100
The Hz oscillation unit 13 and the 1650Hz oscillation unit 14 are
As shown in the figure, it has a bandpass filter 31 and an amplifying section 32, and the bandpass filter 31 converts the signal input from the boat 19 into 21001 (Z or 1
The amplification section 32 amplifies and outputs it as an analog signal of 650 tlz. The signal inputted from the boat 19 is, for example, when the CPU 20 repeatedly sets the output port of the boat 19 in a high state for 1/2 of one cycle of the frequency, and then sets it in a low state for the same time. Created and output by. Note that the 2100Hz oscillation section 13
The 1650H2 oscillator 14 is not limited to the one shown in FIG. It may also be output as

The network control unit 7 is connected to a line, for example, the public telephone network, and the network control unit 7 performs automatic call processing.The 0w4 control unit 7 is equipped with a high-speed modem and a is a V.29 modem modem.

The image processing section 8 includes an encoding/decoding section, an image enlarging/reducing section, etc., and performs encoding/decoding of image data, enlarging/reducing the image, and the like.

The operation section 9 includes a numeric keypad, various operation keys, a display section (for example, a liquid crystal display), and is used for communicating with the operator. The operator inputs various commands using the numeric keypad and various operation keys, and the input commands and various information to be notified to the operator from the factor ξ controller 1 are displayed on the display section.

At the time of transmission, this factor ξ error device 1 scans the original set on the document table of the scanner 4 from the first page, reads the image, encodes it in the image processing section 8, and performs enlargement/reduction processing as necessary. After that, it is transmitted via the network control unit 7.

On the other hand, at the time of reception, the factor ξ error device 1 receives the image data sent from the line L via the network control unit 7, decodes it in the image processing unit 8, and performs enlargement/reduction processing as necessary. After that, the plotter 5 records on recording paper.

Next, the effect will be explained.

The present invention is characterized in that when there is an incoming call, the receiving side requests communication using the shortened protocol mode, and in response, the sending side affirms communication using the shortened protocol mode, thereby further reducing the protocol time. There is. This shortened protocol communication process will be explained below.

Currently, both the sending and receiving sides have the above facsimile machine.
It is assumed that the

On the transmitting side, the operator, as shown in FIG.
Set the original, enter transmission information such as the destination's telephone number and line density from the operation section 9 (step SL), and press the start button. When the transmission information is input, the sending side facsimile machine 1 stores it in the memory 3, and when the start button is pressed, it sets a timer T and passes the destination telephone number to the network control unit 7. calls the destination, as shown in FIG. 7 (step S2).

On the other hand, as shown in FIG. 8, when the receiving side factor ξ error device 1 detects ringing (step Pl), it checks whether its own device has the shortened protocol function of the present invention (step P2). If it does not have this function, it executes normal reception processing (step P).
. When having the shortened protocol function of the present invention,
As shown in Figure 7, the specific CED set in advance
A signal (see FIG. 4) is sent (step P4), and a timer T is set (step P,).

The sending facsimile device 1 must receive the CED signal before the timer T times out (step S).
2. S4), it is determined that the communication has failed and the line is disconnected (step Ss).

If a CED signal is received before the timer TI times out, it is checked whether the received CED signal is a normal CED signal or a special CED signal (step S,) 0 If it is a normal CED signal, the other party's factor 5 indicates that the device is the real one. In step S,), the special CE determines that it does not have the shortened protocol communication function of the invention and executes normal transmission processing.
In the case of the D signal, it is determined that the receiving side facsimile apparatus 1 has the shortened protocol communication function of the present invention, and the shortened protocol mode of the present invention is set.

In the shortened protocol communication of the present invention, a high-speed modem (
As shown in Figure 9, when a special CED signal is received, modem training is performed, and then dummy data is sent and E
Sends OL and NSS signals. Even after sending this NSS signal, the high-speed modem does not stop and continues to perform EO.
After outputting n pieces of L, send image information (image data),
Output six EOLs after the image information (steps Ss, S
, ), When the transmission of one page's worth of image information is completed, the timer T2 is set (step Sho, S++), and a response signal from the receiving side factor ξ device l is waited for (step S, 5I3).

When the receiving facsimile device 1 sends out the special CED signal, it checks whether the carrier of the high-speed modem is sent before the timer T, expires, and goes to steps Ph, P? ), timer T, times out, it is determined that the receiving side does not have the shortened protocol function of the present invention, and normal reception processing is performed (step p
,). If the carrier of the high-speed modem is received before the timer T times out, the modem is trained, then receives dummy data, NSS signals, and image information (step P9), and receives image information for one page. Then, a response signal is sent and a timer Ta is set (step P+or 'Pll+P12) *When the sending facsimile machine l sends image information for one page,
It is checked whether there is a response signal before the timer T2 times out, and if there is no response signal, the line is disconnected (step P).

When the sending facsimile machine 1 receives the response signal from the receiving facsimile machine 1 before the timer T2 times out, it checks whether there is a next page (step 5).
Is), if there is a next page, return to step S8 and similarly transmit the NSS signal and image information continuously (
Step S., S.

1.) When the 0th order page runs out, an EOP signal is sent by the high-speed modem (step S0), the process moves to line disconnection processing, and this flow ends (step 5IT).

When the receiving facsimile machine 1 sends out the response signal, it sets a timer T4 and checks whether the carrier of the high-speed modem is detected before the timer T4 times out.In step P rx, P +s), the carrier of the high-speed modem is detected. If not, line disconnection processing is performed (step P1.). If the carrier of the high-speed modem is received before the timer T4 times out, it checks whether it is EOP or not (step PL&), and if it is not EOP, it is determined that there is a next page and returns to step S9 to similarly process the reception of the next page. (Steps P9 to P14). E.O.
When the P signal is received, it is determined that all the image information has been received, the line is disconnected, and this flow is ended (step P1.).

As described above, according to the present invention, the receiving side that receives an incoming call requests communication processing using the shortened protocol mode, and in response, the sending side issues an acknowledgment for communication processing using the shortened protocol mode. For example, as shown in FIG. 10(a), the protocol time according to the conventional normal protocol takes about 12°15 seconds, and the protocol time according to the conventional shortened protocol takes about 15 seconds. As shown in Figure 1O (b),
What used to take about 7.68 seconds now takes about 4.2 seconds, as shown in Figure 10 (C), according to the shortening protocol of the present invention.
It will only take seconds. Therefore, the protocol time can be significantly shortened, and the overall communication time can be further shortened. As a result, communication charges can be further reduced and the facsimile machine 1 can be used more effectively.

(Effects) According to the present invention, the shortened protocol mode can be quickly entered, the protocol time can be further shortened, and the facsimile communication time can be further shortened. As a result, communication charges can be further reduced, and facsimile machines can be used more effectively.

[Brief explanation of drawings]

1 to 10 are diagrams showing an embodiment of the facsimile communication system of the present invention, and FIG. 1 is a block diagram of a fusing device applied to the facsimile communication system, and FIG.
The figure is a block diagram of the shortened protocol function section of the communication control section, FIG. 3 is a block diagram of the carrier detection section, FIG. 4 is the constituent countries of the special CED signal, and FIG. 5 is the 210
A block diagram of the 0tlz oscillation section (or 1650Hz oscillation section 14), FIG. 6 is a flowchart of the shortened protocol communication process on the transmitting side, FIG. 7 is a sequence diagram of the shortened protocol communication procedure, and FIG. 8 is a flowchart of the shortened protocol communication process on the receiving side. A flowchart of the shortened protocol communication process, FIG. 9 is a diagram showing the signal format of the high-speed modem including the image information, and FIGS. 10(a) and (b)
) and (c) compare the protocol times of the conventional normal protocol (Fig. 10(a)), the conventional shortened protocol (Fig. 10(b)), and the shortened protocol according to the present invention (Fig. 10(C)). FIG. FIG. 11 is a sequence diagram showing a communication procedure using a conventional shortened protocol. l...Facsimile device, 2...System control unit, 3...Memory, 4...Scanner, 5...Plotter, 6. ... Communication control section, 7 ... Network control section, 8 ... Image processing section, 9 ... Operation section, 11 ... Shortened protocol Functional part, 12...
...Switching section, 13...2100Hz oscillation section, 14...
・1650Hz oscillation section, 15...Distribution section, 16...2100Hz detection section, 17...
・1650Hz detection unit, 18...Carrier detection unit, 19...Boat, 20...CPU. Agent: Patent attorney Figure 7 Figure (a) Figure 0

Claims (1)

[Claims] In a facsimile communication system in which facsimile communication is performed by exchanging predetermined facsimile control signals and executing facsimile communication procedures, the receiving facsimile machine sends out a specific CED signal when a call arrives, and the transmitting facsimile machine sends out a specific CED signal. When the receiving facsimile machine receives the NSS signal from the high-speed modem, it skips the normal facsimile procedure and sends the NSS signal using a high-speed modem, and then transmits the image data. A facsimile communication method characterized by omitting the facsimile procedure and receiving image data.