JPS58103271A - Facsimile receiver - Google Patents

Abstract

PURPOSE:To enable the privacy communication for a facsimile receiver, by selecting through a gate circuit whether the picture signal received on the basis of the output of a discriminating circuit is stored in a memory or printed by a line printer. CONSTITUTION:A memory 7 stores the received picture signal, and a line printer 6 prints out the picture signal. A procedure controller 11 discriminator through a discriminating circuit 11' whether or not the preset value is equal to the value supplied thrugh a keyboard 12. Then a phase controlling circuit 8 and a mechanism controlling circuit 9 are actuated to perform a printing process if a coincidence is obtained from the above-mentioned comprison. At the same time, the signal of the memory 7 is fed to a gate 5 and a switch is carried out to supply the output of the gate 5 to the printer 6. When the matching of phase is over, the reading signal is applied to the memory 7. At the same time, the circuit 9 is actuated to clear the contents of the memory 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a facsimile receiver capable of secret communication.

Conventional facsimile machines record the received image signals as they are, so even though facsimile communication uses a telephone line, a medium used for person-to-person communication,
If the receiver is not present at the time, all the received contents are known to the same song, which sometimes causes some inconvenience.

The present invention has been made in consideration of these points, and the present invention will be described in detail below based on examples.

IN! Figure 1 is a block diagram of a Fuji JIJ receiver according to an embodiment of the present invention (11 is a line W & network control ID device that switches the telephone line between the telephone line 121 side and the facsimile receiver side, and a call signal response circuit as required. It also includes (3
: is a modem circuit and may have a built-in modem. (41
In the line memory, the image signal demodulated by the modulation/demodulation circuit is stored one row at a time, with bits corresponding to each picture element. (5
; controls the flow of the image signal with a gate. (6) is a line printer consisting of a recording head for one row of picture elements and its driving circuit. (7; is the screen memory, which consists of a random access memory and a memory address controller, etc., and it lasts forever based on one control signal, and when writing, it writes one line at a time from the preemptive address, until the memory space is full. When this occurs, an overflow mark is output.Also, in the case of continuous writing, one line is read out all at once from the start address to the write end address.(Output is a phase control circuit that performs phase synchronization and outputs a phase signal.) Reference numeral 91 denotes a mechanism control circuit which controls a driving device rlI such as a pulse smoker according to a predetermined procedure.

011 is a procedure control device that sends and receives control signals to and from the communication partner via a modulation/demodulation circuit 131, determines the control signal, and performs one phase control circuit 1m++.
81 memory (7) Mechanism control circuit (controls 91 or monitors and controls operator instructions input via keyboard O3; part of it includes an old judgment circuit for preset key a1). Built-in.

The operation of the facsimile receiver configured as described above will be explained with reference to the procedure diagram of FIG. In Figure 2, the horizontal axis shows the passage of time from the left to the right of the drawing, and the first row shows the standard number recommended by the International Telegraph and Telephone Consultative Committee (CCI??) for general facsimile transmitters. , the lower row shows the respective operations of the above-mentioned facsimile receiver.

First, it is possible to receive the facsimile using the above-mentioned facsimile receiver number and record it on the line printer (6) while receiving, but the operation is exactly the same as the conventional one. The explanation will focus on

First, when this facsimile receiver is installed, a specific person presets an arbitrary number using the preset key 03. Communication then begins, but if the sender wishes to use facsimile communication, first set the f-toko on the transmitter,
``You have to pick up the handset of the RIL handset and dial (hook off).When you receive a call by dialing.

On the receiver side, the line network side sub-device ftl+ works to connect one line to the modulation/demodulation circuit side (3). Procedure control device l1O11
Then, the response signal (,Ca1l@
d5tationIdsntification (commonly known as CHD). After confirming this sound, the transmitter sets the transmitter to confidential transmission mode. The receiving side continues to send function signals (Gro) that explain the functions it has.
upId@ntification: Gl)
send. Of course, this includes a memory (7) and also includes signals indicating the secret communication capability r, t*. The transmitter reads this GI flaw signal and selects the most preferable transmission mode (for example, confidential two-dimensional MR encoding method double-density transmission 96o Ob
p-, etc.) and send the mode selection signal (Group Co.
eoand:GC) is sent. Upon receiving this GC signal, the procedure control device taU sets the phase control circuit (8) and mechanism control circuit (9) to a predetermined operation mode, inputs the gate (5) from the line memory (4), and inputs the gate (5) from the line memory (4) to the memory (71). Since the transmitter continues to send phase signals, the phase is matched using the first phase control circuit (8), and the operating clock of the entire receiver is synchronized to the output of the phase control circuit (8). (In confidential communication, the mechanism control circuit (9)
doesn't work. When this is completed, the matching completion signal (Con
Firmation to Rsoaivs: CF
The transmitting side receives this CFR signal and sends an image signal, which is demodulated by a modulation/demodulation circuit (31).

Line memory (4), memory +7 through gate 15+
Store it in 1. When the image signal ends, the transmitter sends an end signal (End of Message + B OM
) is sent, the procedure controller t(11) decodes it, gives an end signal to the memory (71), and sends a reception completion signal (Mes
Output s+age Confirmatlon:MCFJ. The transmitter receives this MCF signal 8- and terminates the signal (
Proceaser InterruptSlgnal
: PIS) is sent. As a result, communication between the machine is terminated, and the line network controller it) switches the line to the telephone set and disconnects the line.

After that, if the person who made the preset wishes to see the received content, he or she presses the preset number and print key from the keyboard + 121 numeric keypad (J, etc., not shown).

The procedure control device αυ clears the value, and the judgment circuit nl determines whether the value input from the keyboard (+3) is equal or not.
Judging by J, if they are equal to 1, the phase control circuit +81 and mechanism control circuit (9) are activated to enter the printing system. At the same time, enter the gate (51) from the memo January 71 and the line printer (
6) can be switched to output.

When the phase matching is completed, a series of signals are given to the memory (7), and at the same time, the mechanism control circuit W&+91 is activated to record the memory (7).
) clear the contents.

In the above example, the subsequent printing is done using the preset key α.
I matched it with the preset number from 3, but
It may be a physical key such as an optical key, or during communication, a CC signal may be mixed in from the sending side, or a number signal may be sent after the MCF signal and then the PRS signal.

The transmitted number may be taken into the determination circuit (old).

The present invention consists of 5 signals 1. +a h. A memory (memory (7) in the embodiment) for recording and recording the image signals, and a recording device (1t line printer (6) and drive equipment (1α) in the embodiment).

A determination device (same as above) that determines the information of both received signals.

Switching to select whether to record the image signal received based on the procedural system a%#n1l) and the output of the judgment device in the FTi'1 recorder II or in the recording device 11IN. Since it is a facsimile receiver equipped with a circuit (gate 151 in the same example) and a calling means (keyboard Q3 and judgment circuit W&ni+ in the same example) that causes a recording device to record the image signal stored in the first memory, it is easy to use. Thread through secret communication.

[Brief explanation of the drawing]

Figure 11!1 is a block diagram of the facsimile receiver according to the present embodiment, and Figure 2 is a diagram of its communication procedure. (1)...Line network control I! I fermentation, 121...Telephone-0 (31...Genpo Gekidan vF, +41-...Line memory, (51...Gate, (6)...Line printer, (7;... Memory, (81... phase control circuit,
(91... Mechanism control circuit, aα... Sudozokan, ■)
...procedural collateral equipment 1. Qll-...judgment circuit, 0z
...Keyboard, 131...Blissett key.

Claims (1)

[Claims] 1) A memory for storing received image signals, a recording device,
a determination device for determining information on a received image signal; and a switching circuit for selecting whether to store the received image signal in the memory or to record it in the recording device based on the output of the first determination device;
II. A facsimile receiver comprising calling means for recording both signals received in the message memory in a recording device.