JPS58127455A - Picture transmission system - Google Patents

Abstract

PURPOSE:To store a picture signal once in a storage means and to transmit the signal when a recording section is receivable, when the selected recording section is disabled for reception, by providing the storage means for a relay section transmitting picture information. CONSTITUTION:The picture signal outputted from readers R1-R4 is transmitted to a receivable recording section among selected transmission addresses at real time with a control section CPU via an exchange network 701. If there is a reception-disabled terminal among the selected transmission addresses, the picture information is inputted to a page memory 207 and transmitted after the busy state of the selected transmission address is released.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image transmission system, more specifically, an image information transmission system between one or more image information reading units and one or more image information recording units. Examples of such services include fax mail using the public line of Nippon Telegraph and Telephone Corporation. Generally, if the receiving side is receiving image information from another output device, the receiving side waits for the reception to finish, and the sending side uses the information that the receiving side is ready to receive new information. It is clear that image transmission cannot be performed if the person confirms that the image cannot be received. That is, in order to transmit images, it is necessary that both the transmitting side can transmit and the receiving side can receive.

The present invention has been made in view of the above points, and provides an S-image transmission system in which the image reading unit can perform an F1 image reading operation at the transmission source regardless of whether or not the transmission destination is capable of receiving image information. It provides:

Hereinafter, the present invention will be explained in more detail using the drawings.

FIG. 1 is a schematic diagram of the configuration of an image transmission system according to the present invention.

In FIG. 1, 1 is a private branch exchange (hereinafter referred to as PABX). 2-1.2-72 is a reader device that photoelectrically reads an original image and forms an electrical signal. 3-1.3-
2 is image information converted into an electrical signal (hereinafter referred to as image signal)
This is a printer device that forms an image on a recording material such as paper based on the following. Note that the reader device 2-1 and the printer device 3-1 are placed close to each other, and one set of these two devices is the reader device 2-1.
It also operates as a copying machine in which a reader device 2-1 forms an image based on the image signal read by the reader device 2-1. (Note that this operation is called local copy.) L1, L2, and L3 are input/output lines made of, for example, optical fibers that connect the PABXI and the reader device or the printer device and are used for signal transmission including image signals. The image transmission system shown in FIG. 1 is based on a wiring system called a star network centered on PABXI.

PABXl is provided with a switching network for selectively outputting signals input from each input/output line to a predetermined input/output line, as will be described later. In addition, PABXI is a system in which a page memory consisting of, for example, a semiconductor random access memory (RAM) that stores one page of image signals, and an auxiliary memory consisting of, for example, a disk memory that stores multiple pages of image signals, are connected or The image signals read by the reader device 2-1 are formed into an image in the printer device 3-1, or the input/output color line L
At least one of three transmissions is performed: either the image is transmitted to the PABXI via line L3 and stored in the page memory, or it is further transmitted to the printer device 3-2 via input/output line L3 to form an image.

Further, the image signal read by the reader device 2-2 is transmitted to the PABXI via the input/output line L2, and from there is transmitted to the printer device 3-1 or the printer device 3-2 via the input/output line L1. At least one of three types of transmission is performed: or stored in the page memory.

That is, the image signal read by the reader device is transmitted to at least one of the printer devices constituting the image transmission system to form an image. , +) or stored in page memory. Furthermore, it is possible to simultaneously store the information in the page memory while transmitting it to the printer device.

The image signal stored in the page memory is transmitted to a printer installed or further stored in an auxiliary memory according to a request from the printer device or judgment by a control section included in the PABXI.

Although the system shown in FIG. 1 has three routes from PABXI, the number is not limited to this number.

FIG. 2 is a sectional view of one embodiment of the reader device shown in FIG. 1.

In the figure, 201 is a document table glass, 202 is a bar-shaped light source such as a saw/lamp or a fluorescent lamp, 203 is a first mirror, and 204
205 is the second mirror, 205 is the third mirror 206 is the lens, 2
07 is a one-dimensional solid-state imaging device such as a CCD. Note that two sets of lenses 206 and CCDs 207 are provided, and are configured to read half of the document area each.

To explain the operation of the apparatus, an original placed on an original platen glass 201 is illuminated by a rod-shaped light source 202, and a first mirror 203, a second mirror 204, etc. scan (sub-scan) the original.
The lens 406 via the third mirror 405
407. The main scanning direction of the CCD 407 is perpendicular to the drawing. The rod-shaped light source 202 and the first mirror 203 are integrated by a support (not shown), and scan the document surface while moving in the direction F in the figure by a guide rail (not shown) (sub-scanning). Second mirror 204
, the third mirror 205 is integrated with a support (not shown), and the first mirror 205 extends in the same direction as the first mirror 203.
It moves on the guide rail (not shown) at 1/2 the moving speed of No. 3. Rod-shaped light source 2o2° first mirror 203.
Second mirror 204. The third mirror 205 is located at the positions indicated by dotted lines in the figure (202', 203').

204', 205'), but at this time, the optical path length from the document table 201 through the mirrors 203, 204, and 205 to the lens 206 is always kept constant.

In addition, this league device is for A3 size documents in the longitudinal direction.
A document of four sizes is sub-scanned in a direction perpendicular to the longitudinal direction, and the linear density of the reading is 16 lines/inm.

The resolution in the main scanning direction is still 16 Pel/mm.

Therefore, the number of output points per main scanning line is 475.
With 2 bits, this main scanning is performed for 6720 lines for A3 size and 336° lines for A4 size.

As mentioned above, a CCD for photoelectrically converting the original image
Two sets of lens 207 and lens 206 are provided, and approximately one 4752-bit image outputted by main scanning can be read.
/2 Zurekemomotsu. The two series of image signals outputted from the two CODs 207 are formed into one series of image signals corresponding to one main scanning line by the circuit shown in FIG. 3-1.

In FIG. 3-1, 207-1 and 207-2 are the two CCDs mentioned above. 301-1.301-2 is a video amplifier and CCD 20? -1 and 207-2, each output voltage is DC amplified to the required level. 302-1
, 302-2 is an N-converter which converts the analog image signal into a digital signal using a clock pulse (not shown).

303 is a parallel serial converter ~Φ converter 302-
Convert the two outputs from 1 and 302-2 into one serial signal as shown in Figure 3-2 and output it to the output terminal OUT.
Output from.

As is clear from FIG. 3-2, a clock signal (b) synchronized with the image signal (a) is generated. Image signal (a)
The data changes at the rising edge of the clock signal (b), and the clock signal (b) falls at a stable point in the middle of the data. Incidentally, the image signals of the entire area of the document resulting from the main scanning of 3360 lines for A4 size and the main scanning of 6720 lines for A3 size are collectively referred to as an image packet. A dummy clock DCK, which is an identification signal, is attached to the tip of this image packet, so that the PABXI and the terminal can determine whether the subsequently transmitted signal is an image signal or a command signal related to the transmission of an image signal. Discern.

FIG. 4 is a perspective view showing the configuration of one embodiment of the printer device shown as an example of the output section in FIG. This is a photosensitive drum rotatably supported within the housing. 502 is a semiconductor laser that emits a laser beam La, and the emitted laser beam La is made incident on a beam expander 503 to become a laser beam having a predetermined beam diameter. Further, the laser beam is incident on a polyhedral mirror 504 having a plurality of mirror surfaces. Multifaceted °
The body mirror 504 is rotated at a predetermined speed by a constant speed rotation motor 505. The laser light emitted from the beam expander 503 is scanned substantially horizontally by the polyhedral mirror 504. and an imaging lens 50 having f-θ characteristics.
6, the light is imaged as a spot light on the photosensitive drum 501 which is charged to a predetermined polarity by the charger 513.

A beam detector 507 detects the laser beam reflected by the reflecting mirror 508, and uses this detection signal to determine the timing of the modulation operation of the semiconductor laser 502 in order to provide desired optical information onto the photosensitive drum 501.

An electrostatic latent image is formed on the photosensitive drum 501 by the laser light that is imaged and scanned on the photosensitive drum 501 . After this latent image is developed by a developing device 509, it is converted into a developed image by a developing device 509.
, 511, and then the recording material passes through a fixing device 512, whereby the image is fixed on the recording material and is discharged as a hard copy to a discharge section (not shown).

FIG. 5 shows an example of a circuit for modulating the semiconductor laser shown in FIG. 4 with a predetermined image signal.

The image signal inputted from the input terminal IN is transferred to a first line buffer 601 consisting of a shift register or the like having a number of bits equal to the number of pixels for one scan for each group of image signals for one scan.
and is alternately input to the second line buffer 602 under the control of the buffer switch control circuit 603.

Further, the image signals inputted to the first line buffer 601 and the second line buffer 602 are read out alternately every scan using the beam detection signal from the beam detector 604 as a trigger signal, and are applied to the laser driver 605.

A laser driver 605 modulates and controls a semiconductor laser 606 based on an input image signal to control the emission of laser light.

By having two line buffers, while inputting image signals that are input one after another to one of the line buffers, the image signals already stored in the other line buffer are output to the laser driver 605, resulting in high-speed operation. It is compatible with image signal input.

FIG. 6 is a circuit block diagram of an embodiment of the terminal shown in FIGS. 2 and 4, which includes both the printer device and the printer device. 401 is a PABXI provided in the input section of the terminal
If the input line IL is an optical fiber, it is an optical-to-electrical converter (hereinafter referred to as an OA converter). Convert to electrical signal. 402 is a command/image discrimination circuit which determines whether the input packet is an image packet or a command packet by ANDing the electric signal input from the interface 401 with the identification signal added before the packet and the clock as described above. If it is an image packet, a "1" signal is output to the line 403, and if it is a command packet, a "1" signal is output to the life 404. Further, a packet from which the identification signal has been removed is outputted to line 405. Reference numeral 406 denotes an image recording unit and a reader device and a printer device which capture an image packet from an inputted image packet and form an image packet by converting the document into an electrical signal.

4074Q 408 is an AND circuit, AND circuit 4
When the “1” signal on line 403 from the command/image discrimination circuit 402 is input to line 40
5 on line 409
Output on top.

In addition, when the "1" signal on line 404 from the command/image discrimination circuit 402 is input to the AND circuit 407, the command packet input on line 405 is output on line 410.The manual packet is an image packet. If so, line 4
The image packet output on 09 is sent to the printer device 40.
6.

On the other hand, if the input packet is a command packet,
The command packet output on line 410 is input to input command register 411. The input command register 411 stores all 32-bit command packets. 415 is a command analysis and generation circuit.

When it is determined that all 32-bit command packets have been input to the input command register 411, it takes in all of these 32-bit command packets, analyzes their contents, and forms response bits and specification bits as necessary.
All 32 bits are set in the output command register 412 at the same time.

413 is an OR circuit, which is connected to the PABXI formed by the output line 419 of the output command register 412 and the reader device.
An output line 418 of the image signal to be sent to is input.

414 is an interface for outputting incomplete signals to PABXI, and if the output line OL is an optical fiber, an electrical-to-optical converter (hereinafter referred to as a converter) is used to connect line 41 to the PABXI.
The electrical signal input via the terminal 7 is converted into an optical signal and transmitted to the next terminal using an optical fiber as a medium.

Reference numeral 416 denotes an operation control unit provided in the terminal, into which instructions related to sending and receiving image information and driving instructions for the device, such as destination, number of sheets to be sent, size, etc., are input by the user, and the operation of the device is controlled according to these instructions. Although FIG. 6 describes an embodiment of a terminal equipped with both a printer device and a reader device, the terminal of either the reader device or the printer device has approximately the same configuration.

FIG. 7 is a circuit block diagram showing the configuration of the private branch exchange PABXI shown in FIG. 1.

In the figure, CPU is a control unit that controls the operation of the main body of the private branch exchange PABX1 and the operation of the entire image transmission system;
1-R4 is a reader device, Pi to P4 are printer devices, and the reader device R1 and the printer device P1 and the reader device R2 and the printer device P2 are the only two devices that have a copying function as described above. Reference numeral 701 denotes a switching network to which a plurality of input lines and a plurality of output lines are connected, and image signals and command signals inputted from the input lines are selectively outputted to the output lines by an input/output switching signal SL from the control unit CPU. 702 is a page memo 1 huff 04 consisting of a semiconductor random access memory capable of storing image signals for one page.
is an auxiliary memory consisting of a disk memory that stores image signals for a plurality of pages, and has a capacity of 70 MB. 7
03 is a compression circuit that compresses the image signal stored in the page memory 702 using a predetermined compression logic and sends it to the auxiliary memory 704.

705 is a parallel-in-serial-out output command register for serially transmitting command signals related to the transmission of image signals output from the control unit CPU in parallel to a reader device or printer device connected to a switching network;
Reference numeral 706 denotes a 7 real-in-parallel-out input command register for transmitting command signals related to the transmission of image signals serially input from the reader device or printer device to the control unit CPU in parallel.

707 is a DMA controller that controls DMA transfer of image information within PABXI; 708 is a font ROM used to convert coded information into image information;
By having this font ROM 708, character information can be handled using code signals in internal processing.
Memory savings are possible. A data memory 709 stores command signals related to image transmission or records the history of image transmission.

Explain the operation. The image signals output from the reader devices R1 to R4 are selectively input to the page memory 702 by the control unit CPU via the exchange network 701. Information once entered in the page memory 702 is stored when the specified destination is not busy. For example, when there is no transmission/reception request from another terminal device, the page memory 702 is structured so that it can be output as is from this page memory 702 to the transmission destination if it is in a receivable state. At other times, the data is stored in the auxiliary memory 704 through the compression circuit 703. This auxiliary memory 70
4, the image signal is filed with an index added to the beginning of the image signal, and the file number, source address, destination address, etc. are written in this index. The exchange network 701 also has a function that can bypass the page memory 702 and directly send data in real time to the destination printer, and if the destination is in a state where it can receive data, it can also be sent through this route. It has become.

FIG. 8 shows a conceptual diagram of the switching network 701 shown in FIG. 7.

Terminal 8 for connecting a reader device or printer device
Six terminals 01 to 806 are provided, and an input line and an output line are connected to each terminal. Additionally, a page memory 702, an output command register 705, and an input command register 70 provided in the PABXI
Terminals 808 and 809 for connecting 6 are provided.

As described above, the operation of this switching network 701 is controlled by the input/output switching signal SL from the control unit CPU.

Six rotary switches SWI to SW6 are provided for each of the terminals 801 to 806.
Connected to each output line. Also terminals 807 and 8
08 is also provided with rotary switches YO and YO connected to the output line.

Input terminal a of these rotary switches Sw1 to Sw8
-H is connected to the input line of a terminal other than the corresponding terminal. Note that no line is connected to the rotary switch input terminal g. This is page memory 702
This is because it is not necessary to input the command signal from the output command register 705 to the input command register 706, and input the image signal from the page memory 702 to the input command register 706.

The contacts of the rotary switches SWI to SW8 are selectively switched by the input/output switching signal SL input from the control unit CPU.

As an example of the operation of the switching network 701, a reader device is connected to a terminal 801, a printer device is connected to terminals 803 and 804, and if you want to transmit image information from the reader device to two printer devices, but the connection is not made to the terminal 804. When the printer connected to the terminal 803 is busy, the information can be sent in real time to the printer connected to the terminal 804, stored once in the page memory 702 to the printer connected to the terminal 804, and then transmitted from the page memory 702 after the printer is released from the busy state. In such a case, first select the B contact at the bottom of the rotary switch and the A contact at the bottom of the rotary switch, and output the image signal from the reader device at terminal 801 to the printer device at terminal 803 and to the page memory 702. Store it. After that, as soon as the printer device connected to the terminal 804 becomes able to receive data, select the a contact point of the rotary switch reservoir, and the page memory 70
The image signal outputted from 2 is transmitted to the printer device at terminal 804.

Prior to transmitting and receiving image signals, protocols related to image transmission must be exchanged between the PABXI and the reader device or printer device by transmitting and receiving command packets. For this purpose, an output command register 705 and an input command register 706 are used. In FIG. 8, the input command register 706 is selectively input to the rotary switches SWI-6, and the output command register 705 is input to the rotary switches SWI-6, respectively, and is selectively sent out from each terminal SOI-806.

This command information packet is a 32-bit signal as shown in FIG. 9(a), and is transmitted in synchronization with the clock shown in FIG. 9(b). The contents of this command packet are given meanings as shown in FIG. 10, for example.

In addition, in this system, P from the reader device and printer device is
It is not possible to directly issue a request to the ABXI, but it is possible to issue a request in response to a command packet input from the PABXI. Therefore, normally, PABXI sets the rotary switch SWI to the g contact, sends out a command packet indicating whether there is a transmission or reception request from the output command register 705, then sets the rotary switch depth to the g contact, and sends a command packet from the output command register 705 to the terminal 801.
will have a response from the terminal.

Furthermore, rotary switches SW2, SW3,
- Issued in the order of SW6 and repeated periodically.

FIG. 10 shows the format of the command packet.

There are four types of command packets as shown in the figure, and the first four pits of the command packet are used to indicate the type. In FIG. 10, (1) is a type 1% command packet, (2) is a type 2 command packet, (3) is a type 3 command packet, and (4) is a type 4 command packet.

11(a) to 12(c) and FIG. 12 are flowcharts showing the command analysis task and idle task of the control unit CPU of the PABXI. Figures 10 and 11 (
The command analysis operation will be explained using a) to (C) and FIG. 12. The command analysis tasks shown in FIGS. 11(a) to 11(c) are entered by the monitor in response to an interrupt caused by the input of a command packet to the input command register 706 of the PABXI.

The posting also returns control to the monitor, which then executes the idle task.

Assume that no image information is currently stored in the auxiliary memory 704. When the power is turned on, the control unit CPU of the PABXI executes the idle task shown in FIG. That is, since there is no file in the auxiliary memory 704 at step 12-1, the process advances to step 12-9 and command type 1 is sent.

Type 1 command packets are commands for inquiring each terminal as to whether there is a request for transmission or reception, usually by polling as described above.

When the type 1 command returns to the PABXI, it is rejected as a type 1 command in step 1, and step 2
Proceed to. At this time, if there is a transmission request from any terminal in the 33rd bit, the process proceeds from step 2 to step 3 in FIG. 11(a), and a type 2 command is issued. In the type 2 command, the sender writes the destination name, number of sheets to be sent, image size, and designation as to whether the information is confidential and returns it to the PABXI. The bits in the 33rd and 34th bits of the continuation bucket are provided to indicate that when it is desired to send to multiple terminals, it is necessary to resend another destination name etc. using a type 2 command. When the 15th and 16th binoto indicating classified status is set,
The PABXI only stores the image information input to the PABXI in the auxiliary memory 704, and never sends it until a reception request is received from the destination with a file number.

If the PABXI determines in step 4 that a type 2 command packet has been input, it proceeds to step 5 and stores the data in the data memory 70.
First set an index in 9, sender, destination 2 number of sheets,
Please register the size, whether it is classified or not, and the reception date and time Stella 1
The image information from the source 0 is temporarily input into the page memory 702. (Step 7) Then, if the PABXI determines that it is classified as classified in Step 8, it will generate a file number in Step 8, and then in Step 10 it will generate a file number in the data memory 70.
9 and the contents of page memory 702 are stored in auxiliary memory 704. If it is not designated as confidential, the PABXI looks at the destination of the index, issues a type 3 command, and uses the 31st bit to inquire whether the destination can receive the index (step 11).

If it is determined in step 15 that a type 3 command packet has been input to the PABXI, the process proceeds to step 16, and since the 31st bit, receivable bit, is set, it is determined in step 17 whether or not the 34th bit, the response bit, is set. See.

If the response bit is not set, that is, there is even one destination that cannot receive data, the index and the contents of the page memory 702 related to the destination that cannot receive data are generated as a new file and stored in the auxiliary memory 704 (step 18) o In addition, at this time, the busy destination has a waiting time of 15.
Since the response is written to 18 bits, this time is added to the index and written, and the process proceeds to step 20.

On the other hand, if the response bit is sent, a ready flag corresponding to the destination is set in step 19,
Proceed to step 20.

In step 20, it is determined whether there are any other terminals to which type 3 commands should be sent, and if there are, step 1
Returns to 1 and sends and outputs type 3 commands to the remaining terminals again.

If there are no terminals to which the data should be transmitted, the process advances to step 21 and it is determined whether ready flags corresponding to all of the designated destinations have been set. If there is a terminal for which the ready flag is not set, in step 22 the index on the data memory 709 regarding the destination is added to the image information in the page memory 702 and stored in the auxiliary memory 704, and the process proceeds to step 23. Further, if the ready flags corresponding to all the destinations are set, the process advances to step 23.

In step 23, a type 3 command packet with the 32nd bit set, inquiring whether the reception is ready, is output to the terminal whose ready flag is set, that is, the destination capable of receiving image information.

When the command packet with the bit set asking whether reception is ready returns to the PABXI, the process moves from step 24 to step 2.
Proceed to step 5. When responses of preparation completion are received from all the terminals that are not busy in step 25, image information for each number of images is sent from the page memory 702 at once to all the destinations set with the Ready 7 jig (step 26).
.

After transmitting the image information, in step 27, the PABXI sends out a type 3 command packet with the 33rd bit set, which inquires as to whether the transmission is complete.0 When the command packet with the bit set, which inquires as to whether the reception is complete, returns to the PABXI, in step 28 Then proceed to step 29. When receiving a response from the destination to which the image information was sent, the index stored in the data memory 709 is erased in step 30.
Thereafter, the idle task shown in FIG. 12 outputs type 1 command packets to each terminal. At the same time, among the files stored in the auxiliary memory 704 due to idle data, files whose waiting time has elapsed are stored in step 12-
If it is determined in step 4, the index of the file (including the destination address and number of sheets to be sent) is loaded into the data memory 709 in step 12-5, and the process proceeds to step 12-6, where the auxiliary memory 704 also loads the image information into the page memory. 70
Further, in step 12-8, a type 3 command is issued to the destination of the index input to the data memory 709, and after performing the protocol as described above, image information is loaded from the image memory 702. Send out.

In this case, the data memory 709 is transferred from the auxiliary memory 704 to the data memory 709.
The capacity of the auxiliary memory 704 is effectively used by erasing the information loaded into the page memory 702 from the auxiliary memory (step 12-7). Regardless of the previous available time, as described above, the output is output from the auxiliary memory 704 only when a receive request from the destination is received as a type 1 command packet (step 12-2).
Furthermore, if there is a non-classified file in the auxiliary memory 704 that has passed a predetermined period of time, the process proceeds from step 12-3 to step 12-8, and that file is deleted from the auxiliary memory 704. . This allows effective use of the auxiliary memory 704.

In this way, confidential image information is not directly output to the terminal, but is stored in the auxiliary memory and can be output from PABX 1 only when there is a reception request from the destination, so that confidential information is not directly output to the destination. Information is not transmitted to other terminals, and information is not transmitted to unattended terminals.

Also, when transmitting image information to multiple terminals at the same time,
If there is a terminal that cannot receive data, the address and image information of that terminal can be stored and the image can be transmitted to other terminals that can receive data, so it is not necessary for all terminals to be able to receive data.

Therefore, images can be transmitted in real time to terminals that can receive images, and after the unreceivable state is canceled to terminals that cannot receive images,
Image transmission is performed without changing the source.

Also, since the terminal that is unable to receive data notifies the PABXI of the time that it is unable to receive data, the receiving side can notify the PA that it is able to receive data.
Image transmission is performed without notifying BXI again. Next, as a result of issuing a type 1 command, if there is a reception request from any terminal in step 12, a type 4 command packet is sent in step 13. P.A.
BXl is sent to the receiving request destination.

There are two types of reception requests: a request to send image information stored in the auxiliary memory 704, and a request to send a list of reception history related to sending and receiving image information. The receiving request source indicates the requested content of the request using the 5th and 6th bits of the type 4 command packet shown in FIG. 10(4).

When the type 4 command packet returns to the PABXI, the process advances to step 31, and it is determined whether it is a history reception request or an image reception request based on the set state of the 5.6th bit of the command packet.

If the PABXI is a history reception request, in step 32, it sorts only the files related to the receiving destination from the auxiliary memory 704, expands the index in the data memory 709, and further uses the font memory 708 to store the contents. The data is expanded into the page memory 702 and transmitted as an image.

FIG. 15 shows the form of a resume sent from PABXI and recorded by a printer device. As shown in the figure, the file number assigned when the file is stored in the auxiliary memory 704 is written on the left end, and the source, whether it is classified or not, date and time of publication (input), and image size are written below.

Furthermore, it is also possible to output a transmission history that lists the IDs/denoxes related to the transmission of image information from the terminal.

The PABXI, which has sent the image information including the reception history to the reception request destination, again executes an idle task that outputs a type 1 command packet.

Here, if there is an image information file that needs to be received on the terminal that received the reception history, the reception request is sent to the PABX again using a type 1 command packet.
Send to I.

Upon receiving this command packet, the PABXI again sends a type 4 command packet to the terminal that made the reception request. The terminal that receives the type 4 command packet specifies the image information in the auxiliary memory 704 from the operation unit 416 using the file number of the history table corresponding to the image information that needs to be received, and causes it to be transmitted to the PABXI. . This file number is set in the 7th to 10th bits of the type 4 command packet, and the number of files desired to be received is set in the 11th to 14th bits.

In step 33, the PABXI loads the image information corresponding to the specified file number from the auxiliary memory 704 to the page memory 702, and
The desired number of sheets will be sent to the terminal that has received the reception request.

In this way, the source terminal can transmit image information regardless of whether the destination terminal is in a receivable state, and even if the destination terminal is unable to receive it, it is stored in the PABXI memory. Stored for a predetermined period of time. Since each terminal can obtain the storage status of image information addressed to it in the form of a list, it is possible to easily receive the necessary information at the desired time by accessing PABXI from the receiving terminal according to this storage status. You can take it.

As mentioned above, the two combinations of reader R1 and printer PI and reader R2 and printer P2 in FIG. 7 are each PABX.
Copy operations independent of I are possible. Hereinafter, this independent copy operation will be referred to as local copy. Figure 13 and 1
FIG. 4 shows a flowchart of end-to-end operation control.

Here, while creating a local copy, PABXI
When a Type 3 command packet is sent from the PABXI, either interrupt the local copy in progress and interrupt image reception from the PABXI, or reject it and wait for the Type 3 command packet.
A selection button / is provided on the operation unit 416 to select between two modes: writing in the command packet and replying. At power-on, the reader/printer reads this interrupt rejection key using a key sense routine independent of the PABXI and sets/resets a flag indicating permission for interrupts (step 13-1 in FIG. 13).

Then, when a command packet is sent from PABXI, the command analysis routine shown in FIG. 14 is executed. If the input command packet is type 3, the process proceeds from steps 14-1 to 14-2, and if it is a question asking whether the 31st bit can be received, the process proceeds to step 14-3. In step 14-3, it is determined by the key sense routine described above whether or not the interrupt permission flag has been set. If sent, the third command packet
A 4-bit response pit is set and output to PABXI (step 14-4). Then, in step 14-5, an interruption flag is set.

On the other hand, if the interrupt permission flag is not set, the time required to complete the copying operation being executed is calculated in step 14-6, and the 15th to 18th type 3 command packets are
A wait time is set in the bit, and the 34th bit, the response bit, is output to PABXI without being set.

After this, the PABXI control operation described above is performed, so a description thereof will be omitted.

Also, the interrupt permission flag is set and step 14
If the interrupt flag is set in -5, the interrupt flag is determined in step 12-2 every time the copy cycle of local copy ends in FIG. The copy cycle is interrupted, and further waits for the interruption flag to be reset.O Then, after the interruption flag is reset, execution of the local copy is started again. The interruption flag is reset when image reception ends due to an interruption.

On the other hand, if the interrupt flag is not set, step 1
The end flag is determined in step 2-4. The end flag is set at the end of local copying, and the copy cycle is repeated until it is sent. If the end flag is set, the copy cycle out routine is passed and the device is returned to its initial state.

In this way, PABX being locally copied on each terminal
Since it is possible to set whether or not to permit interrupts from I for each terminal, the function can be activated according to the usage status of the terminal. Also, even if interrupts are not allowed, PAB
Since the image information to be sent to the auxiliary memory 704 in the XI is stored, no inconvenience will occur.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the configuration of an image transmission system according to the present invention, Fig. 2 is a sectional view of an embodiment of the reader device, and Fig. 3-1 is a schematic diagram of the circuit configuration of the reader device shown in Fig. 2. 3-2 is a block diagram showing image signals output from the rider device shown in FIG. 2, FIG. 4 is a sectional view of an embodiment of the printer device, and FIG. FIG. 6 is a block diagram showing a schematic configuration of the circuit; FIG. 6 is a block diagram showing the circuit configuration of an embodiment of the terminal; FIG. 7 is a circuit block diagram showing the configuration of an embodiment of PABXI in FIG. 1; FIG. is a conceptual diagram of the switching network in Figure 7, Figure 9 is a diagram showing command signals, Figure 10 is a diagram showing the contents of a command packet, and Figures 11 (a) to (
c) and FIG. 12 are control flowcharts 4 of the control unit in FIG. 7, FIGS. 13 and 14 are control flowcharts of terminal operation, and FIG. 15 is an example of a reception history form. 1 is a PABX% 2-1 and 2-2 are reader devices, 3-1 and 3-2 are printer devices, and 207-
1 and 207-2 are COD, 501 is a photosensitive drum, 50
2 is a semiconductor laser, 415 is a command analysis/command generation circuit, 701 is a switching network, 702 is a page memory, 70
4 is auxiliary memory %'J, 709 is data memory, Sw1 to S
'w8 is a rotary switch. Applicant: Canon Co., Ltd. -1→-f Procedural amendment (voluntary) March 7, 1980 Kazuo Wakasugi, Commissioner of the Patent Office 1, Indication of case Patent Application No. 9853 of 1985 2, Invention Name image transmission system 3, relationship with the amended person case Patent applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
) Canon Co., Ltd. Representative: Ryu Kaku 3-4, Agent Address: 3-301-25 Shimomaruko, Ota-ku, Tokyo 148
Specification to be amended, drawing 6, contents of amendment (1) Figures 10 and 13 of the drawings will be amended as shown in the attached sheet. (2) Amend the specification as shown in the table below.

Claims (1)

[Claims] (1) one or more image reading units, one or more image recording units,
It has a relay section for transmitting the image signal input from the upper reading section to the selected recording section, and a storage means for storing the image signal, and the selected recording section is in a state where it is unable to receive the image signal. If so, the image transmission system stores the image signal in the storage means, and transmits the image signal to the recording section when the recording section becomes ready for reception. Q) In claim (1), if the selected recording section is performing a recording operation using an image signal from a source other than the reading section that inputs the image signal to the relay section, An image transmission system characterized in that an image signal is stored in the storage section.