JPS5894264A - Communication system of facsimile device - Google Patents

Abstract

PURPOSE:To execute communication between 2 kinds of devices without changing the respective kinds of devices, by connecting the first and second kinds of devices using a picture data by analog and digital data, through a converter. CONSTITUTION:The first G III device 2 using an analog data, and the second G II device 3 using a digital data, as picture data connected to a telephone set 1, respectively, are connected to a facsimile switchboard 4, a facsimile trunk 5 is connected to the switchboard 4, and a storage device 6 is connected to the trunk 5. To this trunk 5, a converter by a circuit controller 7 connected to the switchboard 4, a signal distributing device 8, MODEMs 9, 10 for the G III device and the G II device, and a MODEM interface 11 is connected. Subsequently, a video signal from the G III device 2 is sampled by an encoding device 14, is encoded by an encoding system by the G II device 3, and thereafter, is transmitted to the G II device 3. Also, a video signal from the G II device 3 is decoded by a decoding device 16, the decoded signal is transmitted to the G III device 2, and the communication is executed between both G II and G III devices 2, 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a communication method that enables communication between models of facsimile machines having different functions.

Between facsimile machines that use analog data as image data (generally referred to as 011 machines) and models that use digital data as image data (generally referred to as G1 machines). communication is not possible in principle.

Conventionally, in order for one facsimile machine to be able to communicate with the two different models mentioned above, one facsimile machine must have the functions of the two models, excluding the reading section and recording section. For this reason, a standard model having the functions of one model has the disadvantage that it cannot communicate with the other model.

An object of the present invention is to provide a communication system for facsimile machines that can realize communication between two models having different functions without making any changes to those models.

In order to achieve such an object, in the present invention, the CM machine and the 01 machine are connected through a conversion device, and the conversion device includes an encoding means for sampling and encoding an image signal, and a decoding means for decoding the image signal. The image signal from the 011 aircraft is sampled by the encoding means, and after being encoded using the encoding method of the GIII aircraft, it is transmitted to the Gm aircraft, and the image signal from the GIII aircraft is decoded. It is characterized in that the signal is decoded by the decoding means and the decoded signal is transmitted to the 011 aircraft.

Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings. machine, 3 is a GII machine that uses analog data as image data, 4 is a switching machine, 5
6 is a facsimile trunk which is the main part of the invention, and 6 is a storage device.

FIG. 2 shows an example of a specific configuration of the facsimile trunk 5 shown in FIG. 1, where 7 is a line control device, 8 is a signal distribution device, 9 is a G■ aircraft modem 10 is an on-board modem for GII machines. 1 is a modem interface, 12 is a central processing unit, 1
3 is a storage device, 14 is an encoding device, I5 is a decoding device,
16 is a bus coupler. Further, the line control device 7 is connected to the exchange 4 shown in FIG. 1, and the bus coupler 16 is connected to the storage device 6 shown in FIG.

In such a configuration, the flow of image data will be explained in the following four cases.

(1) When facsimile trunk 5 receives image data from 01G1 machine 2 (When facsimile trunk receives image data from 21G1 machine 3) (3) Sends image data from facsimile trunk 5 to 011 machine 3 Case (4) Image data from facsimile trunk 5 is sent to GI
When transmitting to I machine 2, the facsimile transmission control procedure is performed using the CCITT recommendation T- (material) and is divided into the following five phases A to E. That is, phase 1 corresponds to call setup, phase B corresponds to pre-message procedure, phase C corresponds to message procedure and message transmission, phase DFi message termination procedure, and phase E corresponds to call recovery.

(1) When facsimile trunk 5 receives from 01 machine 2 First, in phase A, facsimile trunk 5 receives telephone number 1 from exchange 4.
The GIII machine 2 and the facsimile trunk 5 are connected through the facsimile trunk 5, and the receiving destination is specified. At this time, hand J
The li control is performed by the central control unit 12 shown in FIG.
Data from the machine 2 passes through the line control device 7 and the signal distribution device 8 and is input to the central control device 12.

In phase B, the transmitting terminal's 011
Confirm the identification, encoding method, and transmission speed of machine 3,011 and machine 2. The data in phase B is sent to the line control device 7,
G[[[[Bulk modem 9 or GII machine top modem 10] is input to the central control unit 12 through the dem interface 11.

Figure 3 shows an example of the configuration of the G■ aircraft modem 9.
It consists of a low-speed modem 21 and a high-speed modem 22, with the low-speed modem 21 passing procedural control data and the high-speed modem 22 passing image data.

FIG. 4 shows the configuration of an example of the modem interface 11, in which 31 is a robot connected to the low-speed modem 21, 32 is the high-speed modem 22 and the GII machine modem 10.
There are 110 boats connected to the These robots 31 and 32 convert serial data from the modem into parallel data, and also convert parallel data from central controller 12 into serial data.

33 is a modem interface 11 and a central control unit 12
110 ports of control signals between 0, u and 35 are changeover switches.

With reference to these drawings, identification of 011 aircraft 3 and 011 aircraft 2, and modem switching will be explained.

First of all, the on/off switch is Mochimu i for Gl1 machine.

side so that both the procedure signal from the G1 aircraft 3 and the procedure signal from the G111 aircraft 2 via the low-speed modem 21 can be determined. Then, when it is determined that the transmitting terminal is the GIII machine 2 according to a known procedure, the central controller 12 issues a modem switching signal through the board 33 and switches the modem changeover switch 34 to the 011 machine side. to defeat.

In phase C, image data is received and transferred to the storage device 6.

First, is the image data a line control device? , G111 horizontal G11
1 machine, modem interface liwo AL, storage device 1
Incorporate into 3. In other words, serial image data from the modem is converted to parallel data by the 110 port 32, but the status of the 110 port 32 is displayed on the 110 port 33, and the display shows that the data on the 110 port 32 is full. When the central control unit 12 confirms that this is the case, the parallel data is imported into the storage device 13.

Since the image data is stored in encoded form, if the transmitting terminal is the G1 machine 2, the image data taken into the storage device 13 is stored in the storage device 6 as is. Accumulator 1
3 to the storage device 6 is transferred from the central control device 1 to the storage device 6.
2 issues a transfer command to the server power coupler 16, and the path coupler 16 performs the DMA transfer.

The reception termination process in phases D and E can be performed using known procedures.

(2) When facsimile trunk 5 receives from GII machine 3 Phase A is performed according to the known procedure as in case (1).

In phase B, using the same procedure as in (1), when it is determined that the transmitting terminal is 011 aircraft 3, the modem selector switch 34 is switched to the GL1 aircraft mochim IO side.

In phase C, since the image data from 011 aircraft 3 is analog data, it is necessary to sample the analog data and encode the sampled data before storing it.

First, sampling is performed using the Gl1 machine modem 10.

FIG. 5 shows the configuration of an example of the Mochimu IO for the Gl1 machine, in which 41 is a demodulation circuit, 42 is an oscillator, 43 is a sampling clock generation circuit, the shrine is a sampling circuit, and 45 is a modulation circuit.

FIG. 6 shows the waveforms of the input analog data 51 and the sampled data 52.

Sampling of analog data will be explained with reference to FIGS. 5 and 6.

The analog data 51 demodulated by the demodulation circuit 41 is sampled by the sampling circuit I at the cycle of the clock generated by the sampling clock generation circuit 43, and digital data 52 is output.

This 6-sampling is performed so that the number of bits in one line is the same as the number of bits in one line of G1 machine 2.

In other words, G[[G■
One line of machine 2 is sampled with 1728 bits. The image data sampled in this manner is temporarily imported into the storage device 13.

Next, the encoding device 14 performs encoding using a known MH encoding method. That is, the sampled nine-stroke data is read out from the storage device 13 and loaded into the storage device 13 each time the encoding device 14 finishes encoding one line, and then transferred to the storage device 6.

(3) When transmitting from the facsimile trunk 5 to the GI1 machine 3 In phase A, the receiving terminal is called, and in phase B it is identified that the receiving terminal is the GII machine 3.

When transmitting image data in phase C, the storage device 6 has 011 as described in (t) and (2).
Since the image data received from the aircraft 2 and the image data obtained by sampling and encoding the image data received from the 01 aircraft 3 are stored, the image data read from the storage device 6 is sent to the decoding device 15. It is decoded and transmitted through the modulation circuit 45 of the modem 10 for Gl1 machine. Further, the first part of one line of image data, for example, 4 to 61 minutes, is converted into a line periodic signal under the control of the central controller 12.

(4) Facsimile Trunk 5! 1) When transmitting to G111 machine 2 As in case (3), the receiving terminal is called in phase A, and in phase B, the receiving terminal calls G1
Identifies that 11 planes are flying at 2.

Next, when transmitting image data in phase C, if the encoding method determined in the procedure of phase B is the same as the encoding method of the image data stored in the storage device 6,
Send the image data as is. However, if the encoding methods are different, for example, the transmitting terminal is transmitting with the MR encoding method, but the receiving terminal can only decode the M)() method, then the encoding must be redone. No.

In this case, the image data encoded by the decoding device 15 is first decoded, and then the encoding device 14 encodes it using the encoding method determined in phase B. Send to.

As described above, according to the present invention, communication between the G1 aircraft and the GIn aircraft can be performed by using a standard machine that has only the functions of the G1 aircraft or the GII aircraft as is.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a facsimile apparatus according to the present invention, FIG. 2 is a block diagram of an example of the facsimile trunk of FIG. 1, and FIGS. FIG. 6 is a block diagram of an example of the modem for the Gut machine, the modem interface, and the modem for the GI1 machine, and FIG. 6 is a signal waveform diagram of the upper modem section for the GI1 machine in FIG. 2...G Ill machine, 3...GII machine, 5...
Facsimile trunk, 14... Encoding device, 16
...Decoding device. Agent Patent Attorney Tadashi Akimoto (Fig. 1) 4 'fA stock I6 1 1I L -,, -, J$
Figure 5 whistle Figure 6

Claims (1)

[Claims] A first model that uses analog data as image data and a second model that uses digital data as image data are connected through a conversion device, and the conversion device is provided with an encoding means for sampling and encoding the image signal. , comprising a decoding means for decoding an image signal, the image signal from the first model is sampled by the encoding means, and after being encoded by the encoding method of the second model, Further, the image signal from the second model is decoded by the decoding means, and the decoded signal is transmitted to the first model. communication method of facsimile equipment.