JPS58127459A - Picture transmission system - Google Patents

Abstract

PURPOSE:To store a picture signal to a storage means when a recording section is disable for reception, and to erase the picture signal when the reception is disable even after a prescribed time is elapsed, by providing the storage means for a relay section transmitting the picture information. CONSTITUTION:A picture signal outputted from readers R1-R4 is transmitted to a receptionable recording section among selected transmission addresses with a control section CPU via an exchange network 701 on real time. If there is a reception disable terminal among the selected transmission addresses, the content of a page memory 702 and the index of the transmitted addresses are produced as a new file and stored in an auxiliary memory 704. When the busy state of the transmission address is released, the picture information read out from the memory 704 is transmitted, but when the elapse of the reception disable period for a prescribed time is recognized by checking the index, the stored picture signal is erased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image transmission system, and more particularly, to an image information transmission system between one or more image information reading units and one or more image information recording units. 7-Axiden, which uses the public lines of Nippon Telegraph and Telephone Public Corporation, is an example of a system that conducts this service. Generally, if the receiving side is receiving image information from another output device, it waits for that reception to finish, and after confirming that the receiving side is ready to receive new information, The transmitting side performs image transmission.

Therefore, it is clear that even if the transmitting side is in a transmittable state, image transmission cannot be performed if the receiving side is in a unreceivable state. That is, in order to transmit images, it is necessary that both the transmitting side can transmit and the receiving side can receive.

In addition, in order to solve the above problems, the present invention is equipped with a storage means for recording image information, stores an image signal to be transmitted to a receiving destination that is unable to receive it, and reads it from the storage means when the receiving side becomes able to receive it. There are several possible methods, but if the receiving side is unable to receive data for a long period of time for some reason, the image signal will remain stored in the storage means. This means that even information that is no longer needed is stored.
If these overlap, the storage means will overflow by p. In addition, in order to cope with this, k must be provided with a storage means having a large capacity.

The present invention has been made in view of the above points, and the image reading operation of the reading section is executed regardless of whether or not the receiving side is capable of receiving data, and if the receiving side is in a state where reception is not possible, both image signals are stored in a storage means. Furthermore, if the image signal cannot be received even after a predetermined period of time has elapsed, the image signal in the storage means is erased, thereby providing an image transmission system that performs efficient image transmission and effectively uses the storage means. 0 //' Hereinafter, the present invention will be explained in more detail with reference to the drawings.0 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 PA B X). Reference numeral 2-1.2-2 is a reader device that photoelectrically captures the original image and forms an electrical signal. 3-1.3
-2 is a printer device that forms an image on a recording material such as paper by converting image information converted into an electrical signal (hereinafter referred to as an image signal). Note that the reader device 2-1 and printer device 3-1 are placed in close proximity, and one set of these two devices is connected to the reader device 2.
It also operates as a copying machine in which the reader device 2-1 forms an image based on the image signal read by -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.

The PABXI 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 types of transmission is performed: 1 is transmitted to the PABXI and stored in the page memory, or is further transmitted to the printer device 3-2 and imaged by the input/output line L3. 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 via the input/output line L1 to the printer device 3-1, the printer device 3-2, or the vane. At least one of three types of transmission is performed to be stored in 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 is stored in a 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 the printer device or further stored in the 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 an embodiment of the reader device shown in FIG.

In the figure, 201 is a document table glass, 202 is a rod-shaped light source such as an I.logen lamp or a fluorescent lamp, 203 is a first mirror, and 204
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. Nao, shi/
Two sets of CDs 206 and C and CD 207 are provided, and each half of the original area is read.

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.
2nd mirror 2o4. 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 to the lens 206 through the mirrors 203, 204, and 205 is always kept constant.

Note that this reader device supports 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.

Further, the resolution in the main scanning direction is 16 Pel/mm.

Therefore, the number of holes per main scan line is 4752.
In A3 size, this main scanning is 6720 lines,
For A4 size, 336° line.

As mentioned above, a CCD for photoelectrically converting the original image
207 and lens 206 are provided, and approximately 1 image reading of 4752 pits outputted by main scanning is performed.
/2 each. The two series of image signals outputted from the two CCDs 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 which amplifies the DC output voltage of each of the CCDs 207-1.207-2 to a required level. 302-1.
302-2 is an NΦ converter that converts the analog image signal into a digital signal using a clock pulse (not shown). 3
03 f'i parallel serial converter to radiation converter 302
-1 and 302-2 are converted into one serial signal as shown in Figure 3-2, and the output terminal OU
Output from T.

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 an embodiment of the printer shown as an example of the output section in FIG. , a photosensitive drum rotatably supported within the Uging Ha. 502 is a semiconductor laser that emits laser light La;
is made incident on the beam expander 503, and becomes a laser beam with a predetermined beam diameter. Further, the laser beam is incident on a polyhedral mirror 504 having a plurality of mirror surfaces. The polyhedral mirror 504 is rotated at a predetermined speed by a constant speed rotation motor 505. The laser beam emitted from the beam expander 503 is scanned substantially horizontally by the polyhedral mirror 504. and an imaging lens 5 having f-θ characteristics.
06, an image is formed 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 reflection 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 on 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 developer 509, it is transferred to a cassette 510.
, 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 node 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 sent to a first line buffer 6ot, which is composed 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.
The signals are alternately input to the second line buffer 602 under the control of the buffer switch control circuit 603.

Furthermore, the images and signals input to the first line buffer processor 01 and the second line buffer 602 are transmitted to the beam detector 604.
The beam detection 'signal from the laser beam detection ' signal is used as a trigger signal and is alternately read out every scanning minute and applied to the laser driver 605 .

The laser driver 605 modulates and controls the semiconductor laser 606 based on the 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 a terminal equipped with both the league device and the printer device shown in FIGS. 2 and 4. 401 is the 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 0/E converter), which inputs data as an optical signal from the optical fiber signal transmission line. Convert information into electrical signals. 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 4 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 line 403, and if it is a command packet, a "1" signal is output to line 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, a reader device, and a printer device that read an original and form an image packet as an electrical signal based on the input image packet.

407 and 408 are AND circuits, and the AND circuit 40
8 to line 4 from the command/image discrimination circuit 402
03 “1” signal is input, line 405
The image input by the line 409
Output on top.

Furthermore, 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. 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 pits and specified bits as necessary.
All 32 bits are set in the output command register 412 at the same time.

413 is an OR circuit 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 I is input.

414 is an interface for outputting terminal signals to PABXI, and if the output line OL is an optical fiber, an electrical-to-optical converter (hereinafter referred to as E10 converter) is used to connect line 4.
17 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 the user inputs 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., and controls the operation of the device in accordance with 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, the 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/stem;
1-R4 is a reader device, P1 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 that can store one page of image signals.
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. 0705 is a command signal related to the transmission of the image signal that is output in parallel from the control unit CPU. A parallel-in-serial-out output command register 706 is connected to a switching network and is used to transmit an image signal manually input from a reader device or printer device in a 7-real time. This is a serial-in-parallel-out input command register for transmitting command signals 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, and memory can be saved. A data memory 709 stores command signals related to image transmission or records the history of image transmission.

Explain the operation. 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.

Once the information is stored in the page memory 702, if the specified destination is not busy or there is no transmission/reception request from another terminal device, and the information is ready to be received, it is output as is from this page memory 702 to the destination. The structure is such that it can be used. 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 are provided for connecting 6.

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 a rotary switch and a rotary switch connected to the output line.

Input terminal a of these rotary switches y1 to Sw8
-g is connected to the input line of a terminal other than the corresponding terminal. Note that no line is connected to the input terminal g at the end of the rotary switch. This sends the command signal from the output command register 705 to the page memory 702,
In addition, the input command register 706 also contains the page memory 7
This is because there is no need to input the image signal from 02.

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. If the printer at terminal 803 is busy, the information can be sent in real time to the printer at terminal 803, stored once in the page memory 702 to the printer at 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 of the rotary switch and the A contact of the rotary switch, and output the image signal from the reader device at the terminal 801 to the printer device at the terminal 803 and to the page memory 702. Store it. After that, as soon as the printer device connected to terminal 804 becomes able to receive data, select the a contact point of rotary switch history 4 and page memory 7
The image signal output from 02 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. The input command register 706 is selectively inputted from the rotary switch in FIG. 8, and the output command register 705 is inputted to the rotary switches SW1 to SW6, respectively, and selectively sent from each terminal 801 to 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 issue any requests directly to the ABXI, but the PABXI can also issue requests in response to input command packets. Therefore, normally, the PABXI sets the rotary switch SWI to the g contact and receives a response from the output command register 705 for transmission or reception from the terminal 801.

Furthermore, the rotary switches SW2, SW3, ・
...They are issued in order of urgency and are 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 bits 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, (8) is a type 3 command packet, and (4) is a type 4 command packet.

FIGS. 11(a) to 12(c) and 12 are flowcharts showing the command analysis task and idle task of the control unit CPU of the PABXI. The command analysis operation will be explained using FIG. 1O, FIGS. 11(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 PABXI control unit CP'U
is executing 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 determined in step 1 that it is a type 1 command, and the process proceeds to step 2. 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 pits in the 33rd and 34th bits of the continuation packet are provided to indicate that when it is desired to transmit to multiple terminals, it is necessary to retransmit another destination name, etc. using type 2 commands and cloaks. When the 15th and 16th bits indicating confidential handling are set, the PABXI only stores the image information input to the PABXI in the auxiliary memory 704, and never sends it until there is a request for receiving the file number from the destination.

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 on 9.

Step 5 Image information from the sender is temporarily loaded into the page memory 702 to register the sender, destination, number of images, size, whether it is classified or not, and date and time of reception. (Step 7) Then, if the PABXI determines that the classification is classified in Step 8, it will generate a file number in Step 8, and then in Step 10, it will create an index and page number on the data memory 709.
The contents of 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 of the receivable pit has been sent, it is determined in step 17 whether or not the response bit of the 34th pit 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) 0 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 set, the ready flag corresponding to the destination is sent 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 whose ready flag has not been set, in step 22 the index on the data memory 709 relating to 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. If the ready flags corresponding to all destinations are still set, the process advances to step 23.

In step 23, a type 3 command packet containing the 32nd bit 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 pit 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 terminals that are not busy in step 25, image information for each number of images is sent at once from the page memory 702 to all destinations whose ready flags are set (step 26).
.

After transmitting the image information, in step 27, the PABXI transmits a type 3 command packet with the 33rd bit set, inquiring whether the transmission is complete.

When the pit sectored command packet inquiring about the completion of reception returns to the PABXI, the process advances from step 28 to step 29. When the image information is sent and a completion reply is received from all the destinations, the image information is stored in the data memory 709 in step 30.
After that, the idle task shown in FIG. 12 outputs a type 1 command packet to each terminal. At the same time, if it is determined in step 12-4 that among the files stored in the auxiliary memory 704 by the idle task the waiting time has elapsed, the index of the file (destination address, number of sheets to be sent) is determined in step 12-5. ) is loaded into the data memory 709, and the process proceeds to step 12-6, where the image information is loaded from the auxiliary memory 704 into the page memory 702, and further, in step 12-8, a type 3 command is issued to the data memory 709. The image information is sent to the destination of the index input in , and after the protocol is performed as described above, the image information is sent from the image memory 702.

In this case, a supplementary memo! j 704 to data memory 7
09 and the information loaded into the page memory 702 are erased from the auxiliary memory to effectively use the capacity of the auxiliary memory 704 (step 12-7). Regardless of the time available at the destination, as described above, the data is output from the auxiliary memory 704 only when a receive request from the destination is received in the form of a type l command packet (step 1l-
2).

Further, if there is a non-confidential 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 to the PA in step 13.
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 proceeds 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.

When PABXI is a history reception request.

In step 32, only the file related to the receiving destination is noted from the auxiliary memory 704, the index therein is developed in the data memory 709, and the contents are further developed in the page memory 702 using the font memory 708 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 FIG. The original information, whether it is classified or not, date and time of publication (input), and image size are entered.

Furthermore, it is also possible to output a transmission history that is a list of indexes 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 sends it to the PABXI. urge

This file number is set in the 7th to lo pits 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
From there, the desired number of sheets are sent to the terminal that has received the request.

In this way, the source terminal can transmit image information regardless of whether the destination terminal is in a receivable state.
Even if the destination is unreceivable, it is stored in the PABXI's memory for a predetermined period of time. And each terminal is addressed to you.
Since the storage status of the image information can be obtained in the form of a list, the PABXI can be accessed from the receiving terminal according to the storage status and the necessary information can be easily received at a desired time.

As mentioned above, the two combinations of reader R1 and printer P1 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 terminal 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 fl has been sent, the response bit of the 34th bit of the command packet is set and output to the 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 PABXl 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 the restep 14
If the interrupt flag is set in step -5, the interrupt flag is determined in step 12-2 each time the local copy copy cycle ends in FIG. 13, so in this case, proceed to step 12-3. , interrupts the subsequent copy cycle, and waits for the interrupt flag to be reset.

After it is reset, the local copy starts running 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 set. If the end flag is set, the copy cycle output routine is passed through 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 Xl 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 block diagram showing the schematic configuration of the circuit of the reader device in FIG. 2. 3-2 is a diagram showing an image signal output from the reader device in FIG. 2, FIG. 4 is a cross-sectional view of an embodiment of the printer device, and FIG. 5 is a circuit diagram of the printer device in FIG. 4. 6 is a block diagram showing the circuit configuration of one embodiment of the terminal, FIG. 7 is a circuit block diagram showing the configuration of one embodiment of PABXI in FIG. 1, and FIG. Figure 7 is a conceptual diagram of the switching network, Figure 9 is a diagram showing command signals, Figure 10 is a diagram showing the contents of command packets, and Figures 11 (a) to (
C) and FIG. 12 are control flowcharts of the control unit in FIG. 7, FIGS. 13 and 14 are control flowcharts of the operation of the terminal, and FIG. 15 is a diagram showing an example of the reception history form. Yes, l is PABX. 2-1 and 2-2 are reader devices, 3-1 and 3-2 are printer devices, 207-1 and 207-2 are CCDs, 50
1 is a photosensitive drum, 502 is a semiconductor laser, 415 is a command analysis/command generation circuit, 701 is a switching network, 702
704 is a page memory, 704 is an auxiliary memo 1, Huff 09 is a data memo 1, and SWI to SW8 are rotary switches. f Continuing Amendment (Voluntary) Commissioner of the Japan Patent Office Kazuo Wakasugi 1. Indication of the case Patent Application No. 9857 of 1982 2. Title of the invention Image transmission system 3. Person making the amendment Relationship with the case Patent applicant address Tokyo 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
)Representative of Canon Co., Ltd. Ryu Kaku Part 4, Agent address: 3-30-25 Shimomaruko, Ota-ku, Tokyo 148, Details and drawings subject to amendment 6, Contents of amendment (1) Figure 10 of the drawings and Figure 13 has been supplemented as shown in the attached sheet. (2) Supplement the specification as shown in the following table.

Claims (1)

[Claims] one or more image reading sections, one or more image recording sections, a relay section for transmitting an image signal obtained from the reading section to the selected recording section, and a storage means for storing the image signal. and storing the image signal in the storage means if the selected recording section is unable to receive the image signal;
An image transmission system characterized in that the image signal is deleted if the Imperial Records Recording Unit is unable to receive data even after a predetermined period of time has elapsed.