JPS58127453A - Picture transmission system - Google Patents

Abstract

PURPOSE:To attain transmission in response to the state to be used of a terminal, by providing a storage means for storing a picture signal for a relay section transmitting the pictue signal obtained from a reading section to a selected recording section and transmitting the picture signal with the request from the recoring section. CONSTITUTION:The picture signal outputted from readers R1-R4 is inputted to a page memory 702 with a control section CPU via an exchange network 701. The information given once to the page memory 702 is outputted as it is when a request from the terminal device of the designated transmission address is present, and if no request is made, the information is stored in an axuiliary memory 704 through a compression circuit 703. In storing the information to the memory 704, it is filed with an index at the head of the picture signal. Further, the picture information is read out and transmitted from the memory 704 with the request from the terminal device at the transmitted address.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image transmission system, and more particularly to a system for transmitting image information between an image i&' information reading section on υ and one or more image information recording f&heating sections.

Conventionally, as a device for transmitting image information, there is a facsimile machine which is used for public circulation by Japan's Kamishinkiwa Public Company. Generally, these are devices on the receiving side 8, or if the receiving side is in good condition, they output the transmitted image information as is.

Here, there is a device for receiving and writing image information! For example, printers are generally expensive and require space to install, so a single receiving device is often shared by multiple people or stations, so the original recipient is Even in cases where the sender is not present, information transmission may end up being carried out despite the sender's will due to the sender's operation.

In addition, if the original receiver is absent, the sender of the information does not transmit the information, and the receiver transmits the information only when the receiver is present, as described above. Transmission is never carried out regardless of the receiver's will (・However, in this case, the sender and the receiver have no knowledge of the receiver's whereabouts (both 1 and 1).
It is a burden to have to check the times.

The present invention has been made in view of the above points, and includes a relay section that transmits the iii]I image signal obtained from the image information reading section to a selected image information recording section or a memory that stores the image 1 signal. By transmitting the image signal of the storage means to the recording section in response to a request from the recording section, the reading section can perform an image reading operation regardless of the state of the recording section. The present invention provides an image transmission system in which an image signal is transmitted to a recording section.

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 PA B X). 2-1.2-2 is a league device that photoelectrically takes over the original image and forms an electric 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 the printer device 3-1 are placed in close proximity, and a pair of these two devices prints the reader device 2-1 based on the image signal read by the IJ-reader device 2-1.
It also operates as a copying machine that performs image formation in step 1. (Note that this operation is called local copy.) L1, L2, and L3 are traffic lines made of, for example, optical fibers that connect the PABXI and the league device or the printer device and are used for signal transmission including image signals. be. 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 predetermined input/output lines, 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 0 league device 2-1 in which they are built are formed into an image in the printer device 3-1, or input/output line/L
At least one of three types of transmission is performed: either the image is transmitted to the PABXI via the input/output line L3 and stored in the page memory, or it is further transmitted to the printer device 3-2 via the input/output line L3 to form an image.

Further, the image signal read by the league 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 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 cross-sectional view of the embodiment of the reader device shown in FIG.

In the figure, 201 is an original table glass, 202 is a bar-shaped light source such as a halogen 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,
207 is a one-dimensional solid-state image sensor 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 2o3, a second mirror 204, and so on 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. Bar-shaped light source 202° 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 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 output bits for one main scanning 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 output from the two CODs 207 are formed into one series of image signals corresponding to one main scanning line by the circuits shown in FIGS. 3 to 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 a V-converter that converts the analog image signal into a digital signal using a clock pulse (not shown). 303 U parallel serial converter to N converter 3
The output of the two systems output from 02-1 and 302-2 is connected to the third
It is converted into one system of serial signals as shown in Figure 2 and output from the output terminal oTJT.

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 when the amount of data is stable. 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 bucket, and this allows the PABXI and the terminal to determine whether the subsequently transmitted signal is an image signal or a command signal related to image signal transmission. 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. This is a photosensitive drum rotatably supported within the Ha. Reference numeral 502 denotes a semiconductor laser that emits a laser beam La. The emitted laser beam La is made incident on a beam expander 503 and becomes 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. 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 506 having f-θ characteristics.
As a result, 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 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 5 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, a cassette 510,
The image is transferred to a recording material stored in one of the recording materials 511, and further passes through a fixing device 512, whereby the image is fixed on the recording material and is discharged as a 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 input from the input terminal IN has 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.

Furthermore, the image signals manually input to the first line buffer 6 old and the second line buffer 602 are read out alternately every scanning minute 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 possible to handle human power of image signals.

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 the second article and FIG. 4. 401 is the PABXI installed in the input section of the terminal.
If the human power line IL is an optical fiber, it is an optical-to-electrical rewriting device (hereinafter referred to as a converter), which is used to input data as an optical signal from the optical fiber signal transmission line. Convert to electrical signal. 402 is a command/image discrimination circuit, and the interface 401 also determines whether the input bucket is an image packet or a command packet by ANDing the input electric signal with the clock and the identification signal added before the packet and node 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. Furthermore, the bucket from which the identification signal has been removed is output on line 405. Reference numeral 406 denotes an image recording unit and a reader device and printer device that read an original and form an image packet as an electrical signal based on an 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
03-11" signal is input, line 405
The image input by line 409
Output on top.

Furthermore, when the “1” signal on line 404 from command/image discrimination circuit 402 is input to AND circuit 407, the command packet input on line 405 is output on line 410.

Line 4 if the input bucket is an image packet
The image packet output on 09 is sent to the printer device 40.
6.

On the other hand, if the input bucket 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 Comarado analysis and generation circuit.

When it is determined that all 32-bit command packets have been input to the input command register 411, all 32-bit command packets are incremented, the contents are analyzed, and response bits and designation bits are formed 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 the terminal signal to PABXI, and if the output line OL is an optical fiber, the line 41 is
It converts the electrical signal inputted through 7 into an optical signal and transmits it to the next terminal using optical fiber as a medium.

Reference numeral 416 denotes an operation control unit provided in the terminal, which sends instructions related to the transmission and reception of image information and two-drive commands of the device, such as transmission destination,
The number of sheets to be sent, size, etc. are input by the user, and the operation of the device is controlled accordingly. Although FIG. 6 describes an embodiment of a terminal equipped with both a printer device and a reader device, either the reader device or the printer device One terminal also has roughly 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-P4 is a printer device, 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.

705c Parallel-in/real-out output command register for serially transmitting command signals related to transmission of image signals output in parallel from the control unit CPU to a reader device or printer device connected to a switching network;
706 is a serial-in-parallel-out input command register for parallelly transmitting command signals related to the transmission of image signals input from a printer device or a 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, 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
0 is provided with terminals 808 and 809 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 Sw1 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, which is connected to the output line.

Input terminal a of these rotary switches SWI to Sw8
-H is connected to the input line of a terminal other than the corresponding terminal. Furthermore, no line is connected to the input terminal g of the rotary switch -H. 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 rotary switches Sw1 to SW8 are selectively switched on and off 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 it is desired to transmit image information from the reader device to two printer devices, but the connection is made to the terminal 804. If the printer connected to the terminal 803 is busy, the information can be sent to the printer connected to the terminal 803 in real time, 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 of the rotary switch and the A contact of the rotor 1, and output the image signal from the reader device at terminal 801 to the printer device at terminal 803, as well as to the page memory 702. and store it. After that, as soon as the printer device connected to the terminal 804 becomes able to receive data, select the A contact of the rotor 1)-switch, and
The image signal output from 02 is sent to the terminal 804.

Send to printer device.

Prior to transmitting and receiving image signals, protocols related to image transmission must be exchanged between the PABXI and the 1J-type printer or printer by transmitting and receiving command notes. For this purpose, output command register 7
05 and human command register 706 are used. The input command register 706 is selectively inputted from the rotor 1 in FIG. .

This command information is a 32-bit signal as shown in FIG. 9(a), and is transmitted in synchronization with the clock shown in FIG. 9(b). It is seasoned as shown in Figure 10.

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, the PABXI sets the rotary switch SWI to the g contact and sends a command message from the output command register 705 indicating whether there is a transmission or reception request.
Next, the rotary switch SW8 is set to the g contact, and a response is received from the terminal 801.

Furthermore, the rotary switches SW2, SW3, ・
...is issued in the order of 1, and is 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 Figure 10, (1) is type 1, and (2) is type 2. (81 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 PABX1.

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

Assume that no image information is stored in the auxiliary memo+7704. When the power is turned on, the control unit CPU of PABXI
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 33rd and 34th bits of the continuation packet are provided to indicate that when the packet is to be sent to multiple terminals, it is necessary to resend another destination name, etc. using a type 2 command. When No. 15 and 16 focus indicating classified status is set, P
The ABXI only stores the image information input to the PABXI in the auxiliary memory 704, and never sends it until there is a request to receive 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.
9, first set an index, sender, destination 1 number,
Step 5: The image information from the sender is temporarily loaded into the page memory 702, including the size, whether it is classified or not, and the date and time of receipt. (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 inquires from the 31st pit whether the destination can receive the data (step 11).

If it is determined in step 15 that a type 3 command packet has been input to P A, B Check whether it is done or not.

If there is even one destination for which the response bit is not sent, that is, there is even one destination that cannot be received, the index and the contents of the page memory 702 related to the destination that cannot be received are generated as a new file and stored in the auxiliary memo 1) 704. (Step 18). At this time, the busy destination replies by writing the waiting time in the 15th to 18th bits, so 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, 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
Returning to step 1, type 3 commands are set and output 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. Further, if the ready flags corresponding to all the destinations are set, the process advances to step 23.

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

When the command packet with the bit set inquiring whether reception is ready is returned to the PABXI, the process proceeds from step 24 to step 25. When responses of preparation completion are received from all terminals that are not busy in step 25, the page memory 702 transmits image information for each number of images at once 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 pit set, inquiring whether the transmission is complete.

When the command packet with the bit set to inquire about reception completion returns to the PABXI, the process advances from step 28 to step 29. When completion replies are received from all destinations to which image information has been sent, the index stored in the data memory 709 is erased in step 30, and then a type 1 command packet is output to each terminal by the idle task shown in FIG. . 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 performing the protocol 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 memo IJ 704 (step 11-7). Regardless of the time available at the destination, the auxiliary memory 704 is also output only when it is received as a Receive Refstrater Type 1 command packet from the destination as described above (step 1).
2 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 the PABXI only when there is a reception request from the destination, so that confidential information is not 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 images can be transmitted to terminals that cannot receive images without changing the source after the unreceivable state is released.

In addition, the terminal that is unable to receive data informs pABxx of the time when it is unable to receive data, so it is now able to receive data.

Image transmission is performed without the receiving side notifying the PABXI 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.

If the PABXI is a history reception request, in step 32, the PABXI sorts only the files related to the reception 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. It is developed 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 is a list of indexes related to the transmission of image information from the terminal.

After transmitting the image information including the reception history to the reception request destination, the PABXI again executes the idle task of outputting a type 1 command packet.

Here, if there is a file of image information that needs to be received on the terminal that received the reception history, PAB the reception request again using the type 1 frame / dopakenote.
Send to XI.

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 (d).

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.
Even if the destination is unreceivable, it is stored in the PABXI's memory 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 PL 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 the 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 iL is set, 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 copy operation being executed is calculated in step 14-6, and
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 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. , aborts the subsequent copy cycle and waits for the abort flag to be reset.

Then run the local copy again after the reset,
J starts. 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 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 for each terminal whether or not to permit interrupts from l, 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 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 an embodiment of the terminal; FIG. 7 is a block diagram showing the configuration of an embodiment of the PABXI in FIG. The figure is a conceptual diagram of the switching network in Figure 7, Figure 9 is a diagram showing command signals,
Figure 0 shows the contents of the command packet, Figure 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 an example of the reception history form. 1 is a diagram showing PABX, 2-1 and 2-
2 is a reader device, 3-1 and 3-2 are printer devices, 2
07-1 and 207-2 are CCD, 5 old is photosensitive drum,
502 is a semiconductor laser, 415 is a command analysis/command generation circuit, 70I is a switching network, 702 is a page memory,
704 is auxiliary memory, 709 is data memory 1 SWI~
SW8 is a rotary switch0 Applicant: Canon Co., Ltd. e:IIi&/15 [, continued amendment (voluntary) 1982
March 7th, Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office, Indication of the case 1982 Patent Application No. 9851, Title of the invention Image transmission system, Relationship with the person making the amendment Case Address of the patent applicant Shimomaruko, Ota-ku, Tokyo 3-30-2 Name (100
) Canon Co., Ltd. Representative Ryu Kaku Sanbe, Agent Address: 3-30-25 Shimomaruko, Ota-ku, Tokyo 14111
, the specification and drawing 6 to be amended, and the content of the amendment (1) Figures 10 and 13 of the drawings will be amended as shown in the attached sheet. (2) The specification shall be amended as shown in the following table.

Claims (1)

[Claims] An image transmission system comprising one or more image reading sections, one or more image recording sections, and a relay section that transmits an image signal obtained by the reading section to the selected recording section,
The relay section has g[2 memory means for storing an image signal,
An image transmission system characterized in that an image signal stored in the storage means is transmitted to the recording section in response to a request from the recording section.