JPH0225165A - Control system for facsimile equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control system for a facsimile machine having a Group 3 facsimile transmission function.

[Prior Art] Group 3 facsimile machines perform modem training between the transmitting device and the receiving device before transmitting image information, so that the high-speed modem function set by the transmitting device for transmitting image information can be used. Determining whether there is.

If the receiving device detects more data errors than the specified value during this modem training, the receiving device notifies the transmitting device to that effect, and the transmitting device increases the transmission speed of the high-speed modem function by one level. I am trying to perform modem training again when the level has decreased.

In this way, between the transmitting device and the receiving device.

The transmission speed of the high-speed modem function used to transmit the image information is determined.

[Problems to be Solved by the Invention] By the way, during this modem training, only the modem function part is operating in both the transmitting device and the receiving device, and the original reading section and the document reading part that operate in the transmitting device during transmission are , the image recording unit that operates during reception in the receiving device is not operating.

The document reading section and the image recording section each use a motor to transport the document to be read and the recording paper, and when the document reading section and the image recording section are operated,
Because of the power consumption of those motors.

The power supply voltage in the transmitter and receiver may become unstable.

In that case, the transmitting signal level of the transmitting device becomes unstable, and the receiving signal level obtained by the receiving device becomes unstable, resulting in more data errors than during modem training, which causes the receiving device to This has caused an inconvenience in that the number of transmission errors included in the image information received is increased.

In addition, if the facsimile machine is equipped with an image information storage function 1, for example, when performing time-specified transmission using this image storage function, the operator sets the destination and transmission time and reads the transmitted document. 1. To avoid leaving the facsimile machine with the original to be sent after scanning.
If a transmission error occurs during image information transmission, it is not possible to take appropriate measures against it.

For this reason, especially when transmitting image information using the single image storage function, it is desirable to be able to reliably transmit image information without single image errors.

The present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a control system for a facsimile machine that can prevent transmission errors as much as possible during actual image information transmission.

[Means for Solving the Problems] In the present invention, when image information transmission using the single image storage function is performed, the determination conditions for modem training are changed from those for other cases, and the transmission is performed at the time of actual image information transmission. The image information transmission speed is set in a direction that does not cause errors. Furthermore, during modem training, the transmitting device operates the drive system of the image reading device, and the receiving device operates the drive system of the image recording device, so that modem training is performed in a situation similar to that of actual image information transmission. .

[Operation] Therefore, when transmitting image information using the image storage function, if the condition of the transmission path is relatively poor.

Because the image information transmission rate is set to a lower value.

It is possible to suppress the occurrence of transmission errors during image information transmission. Also, the power status during modem training.

Since the power state is set to be almost the same as when transmitting image information, more accurate modem training can be performed.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a facsimile machine according to an embodiment of the present invention.

In the figure, a system control unit 1 is for executing various operations of this facsimile machine and group 3 facsimile transmission control procedure processing, and its control programs and various information necessary for processing control are stored in a system memory 2. The data is stored, and its work area is formed in the work memory 3.

The scanner 4 is for reading the image of the transmitted document at a predetermined resolution, and the plotter 5 is for recording and outputting the image of the received document at a predetermined resolution.

The operation display unit 6 includes various operation keys necessary to operate the facsimile machine and a display device for displaying various information such as guidance messages.

The image recording device 7 is for accumulating a large amount of encoded and compressed image information, and the encoding/decoding unit 8 encodes and compresses the single signal and also stores the encoded and compressed image information. This is for decoding both original signals.

The network control device M9 connects this facsimile device to a telephone line, which is a transmission line, and has an automatic call/receive function.

The modem 10 performs modulation and demodulation processing for transmitting and receiving digital data via a telephone line.

In addition, these system control unit 1, system memory 2.
Work memory 3. Scanner 4, plotter 5, operation display section 6, image storage device 7, encoding/decoding section 8, network control device 9
．． The modems 1o exchange data with each other via a path line 11.

With the above configuration, the operator of the facsimile machine sets the transmission mode to timed transmission, and sends the original to the scanner 4.
, set the transmission destination and specified transmission time, and turn on the start key, the sending facsimile machine will
First, an image of a transmission document set on the scanner 4 is read, encoded and compressed by the encoding/decoding section 8, and then the scanner 4 waits until a designated transmission time. Then, at the specified transmission time, a call is made to the transmission destination specified at that time.

As a result, a telephone line is established with the destination facsimile machine on the receiving side, as shown in FIG. 2(a).

The receiving facsimile device first responds with a signal CED indicating that the terminal is a non-voice terminal, and then responds with a signal DI to notify the standard transmission function of the terminal.
S and a signal NSF for notifying the non-standard transmission function of the terminal itself.

The sending facsimile device sends a signal NSS to the receiving facsimile device indicating that the image information transmission is using the transmission function and the image storage function, and transmits the transmission speed set at that time. A signal TCP for modem training is transmitted to the receiving facsimile machine. Also, at this time, the transmission speed is
Set the maximum speed that can be set to 9600 bps.

The receiving facsimile device receives the signal TCP at the transmission rate set by the signal NSS, and determines whether the data error at that time is less than or equal to the specified number of bits. At this time, if the condition of the transmission path is relatively poor and the data error exceeds the specified number of bits, it is determined that the transmission speed at that time cannot be used, and a hail signal FTT is sent to the sending facsimile machine to that effect. .

This allows the sending facsimile machine to increase the transmission speed by 1.
Signal NSS with content reset to 7200bps below the stage
is transmitted to the receiving facsimile machine, and the signal TCP is transmitted again at that transmission speed.

At this time, if the data error is less than the specified number of bits when receiving the signal TCP, the receiving facsimile machine determines that the current transmission speed is usable, and sends a warning signal CFR to the transmitting facsimile machine to that effect. Respond to the device.

As a result, the sending facsimile device transmits the image information PIX stored in the 1-image storage device 7 to the receiving facsimile device, and when the transmission is completed, it sends a hail signal EOP indicating the end of the 5-image information transmission. do.

If the transmission error included in the image information received at that time is less than a specified value, the receiving facsimile device responds with a signal MCF indicating that the reception result is good.

When the sending facsimile machine receives the signal MCF,
Send a hail signal DCN to disconnect the line,
Restore the line.

In this way, nine-stroke information is transmitted from the sending facsimile machine to the receiving facsimile machine. Also, in this case! & Many transmission errors were detected during the first modem training with a high speed setting, and during the second modem training with a transmission speed one step lower than the maximum speed, the transmission errors became smaller and the 1-way information transmission speed became the maximum speed. from 1
It is set to a step-down value.

On the other hand, when the condition of the transmission path is very good, as shown in FIG. 1-car information transmission speed is set to the maximum speed.

Now, during this modem training, the receiving facsimile machine performs the processing shown in FIG.

That is, first, the high-speed modem function of the modem 10 is set to the transmission speed set by the signal NSS (101), and the image information transmission at that time uses the 5 image storage functions, such as time-specified transmission. It is determined whether or not (determination 102).

When the result of decision 102 is YES, the signal TCP
The specified value E B T 4 is the standard for determining the reception result of
．． :, Process 103) to set the default value EBT to 10 (103), and when the result of judgment 102 is No, process 104) to set the default value EBT to 15; in this state, receive the signal TICF transmitted from the sending facsimile machine ( Processing 105)
.

In this process 105, a data error during reception of the signal TCP is detected, and the number of error bits detected thereby is set in a variable EBN (process 106).

Then, it is checked whether the variable EBN is larger than the specified value EBT (decision 107), and when the result of determination 107 is YES, the signal FTT is processed in response to the sending facsimile machine (108).

When the result of the judgment 107 is NO, a signal CFR is sent as a response to the sending facsimile machine (process 109).

Therefore, at the time of memory transmission, the value of the default value EBT for determining the modem training result is set to 10, and in other cases, the value of the default value EBT is set to 15. It is judged harshly.

For example, if the condition of the transmission path is relatively bad and 14 bit errors occur when receiving the signal TCP, the signal FTT will be responded to during memory transmission, so the image information transmission speed will decrease by one step, and if it is not during memory transmission. Since the signal CFR is responded to, the image information transmission speed at that time is directly applied to the image information transmission.

In this way, in this embodiment, when transmitting memory, the image information transmission speed is set in a direction that is smaller than in other cases, so it is possible to suppress the occurrence of transmission errors when transmitting one-image information. This makes it possible to perform appropriate image information transmission.

By the way, when transmitting single-picture information, the transmitting facsimile machine operates the image reading device and the receiving facsimile machine operates the image recording device, which causes fluctuations in the power supply voltage, which causes the transmission signal of the transmitting facsimile machine to The level of the received facsimile machine may vary, and the level at which the receiving facsimile machine determines the received signal may vary.

On the other hand, conventionally, during modem training, the image reading device and the image recording device are not operating, so there is less variation in the level of the transmitted and received signals, and the transmission conditions are better than when actually transmitting image information.

Therefore, the image information transmission rate tends to be set to a higher value.

Therefore, when the level fluctuation of the received signal received by the receiving facsimile device becomes large during actual image information transmission, data errors frequently occur in the received image information.

Figure 4 shows how to solve these conventional inconveniences.
5 shows a facsimile device according to another embodiment of the present invention. In addition, in this figure, the same parts as in FIG. 1 are given the same reference numerals. In addition, this facsimile machine
Does not have image information storage function.

In the figure, motor 12 and motor 13 are shown.

These are used as power sources for the paper transport mechanisms of the scanner 4 and the plotter 5, respectively, and their operations are controlled by the system control unit 1, respectively.

The scanner 4 is a document conveying type image reading device, and the plotter 5 is a thermal recording type image recording device using a roll of thermal recording paper.

In this embodiment, an example of the modem training process when transmitting image information is shown in FIG. 5, and an example of the modem training process when receiving 1-way information is shown in FIG. 6, respectively.

In FIG. 5, the image information transmission mode at that time is set based on the content of the signal NSF transmitted from the receiving facsimile machine and the image information transmission function provided in the own terminal (201), and the signal The NSS (DIS) is transmitted to the receiving facsimile machine to notify the setting contents to the receiving facsimile machine (process 202).

Then, the process 203 starts the motor 12 of the scanner 4.
), the high-speed modem function of the modem 10 is set to the image information transmission speed set at that time, and the signal TCP is sent out (processing 205).

When the process 205 is completed, the motor 13 of the scanner 4 is stopped (process 205), and the process waits for any response signal to be transmitted from the receiving facsimile machine (process 206).
).

When the receiving facsimile machine responds with the signal CFR (result of judgment 207 is YES), the image information transmission speed set at that time can be used, so one-image information transmission is started in that state (process 208).

When the receiving facsimile device responds with the signal FTT (result of judgment 209 is YES), the image information transmission speed set at that time cannot be used, so it is checked whether the image information transmission speed can be further reduced (judgment 209). 210)
, when the result of the judgment 210 is YES, the one-picture information transmission speed is lowered by one step and the transmission mode is reset (process 211), and the process returns to process 202 and the signal NSS (DI
S) transmission and modem training.

When the result of determination 210 is No, the process moves to process 208 to transmit image information at the current image information transmission speed.

Also, the receiving facsimile machine receives the signal CFR.

When a procedure signal other than FTT is received as a response, processing corresponding to the procedure signal is executed (processing 212).

In FIG. 6, the receiving facsimile machine receives the signal NS
S (DIS) to set the transmission mode of the own terminal to the transmission mode specified by the sending facsimile machine 30
1) The motor 13 of the plotter 5 is started in the recording paper retraction direction (process 302), and the signal TCP is received (process 303).

When the process 303 is finished, the process 3 to stop the motor 13 is executed.
04), the modem training result at that time is judged (judgment 305), and if the judgment result is good (OK), the signal CFR is processed responsively to the sending facsimile machine 306), and the judgment result is bad (NG). ), the signal FTT is responded to the sending facsimile machine (process 30).
7).

In this way, in this embodiment, during modem training, the transmitting facsimile machine operates the motor 12 of the scanner 4.
Since the receiving facsimile machine operates the motor 13 of the plotter 5, the equipment conditions such as voltage fluctuations during modem training almost match the conditions during actual image information transmission, thereby making it more suitable. The image information transmission speed is set to a certain value.

In addition, in the embodiment described above, during modem training,
The transmitting facsimile machine operates the scanner motor, and the receiving facsimile machine operates the plotter motor, but the elements that are operated during modem training are not limited to these.

For example, when a receiving facsimile machine uses a page printer such as a laser printer as a plotter, it operates elements that consume large amounts of power during reception, such as its fusing heater and scan motor for scanning the laser beam. Also, the sending facsimile machine
Similarly, elements that consume large amounts of power may be activated during transmission.

Further, in the above-described embodiment, a facsimile machine without an image storage function was described, but this embodiment can be similarly applied to a facsimile machine equipped with a single image storage function.

[Effects of the Invention] As explained above, according to the present invention, when performing image information transmission using the single image storage function, the modem training judgment conditions are different from those in other cases, and the actual image The image information transmission speed is set in a direction that does not cause transmission errors during information transmission, so if the transmission path condition is relatively poor, the image information transmission speed is set to a lower value. , it is possible to suppress the occurrence of transmission errors during image information transmission.

Furthermore, during modem training, the transmitting device operates the drive system of the image reading device, and the receiving device operates the drive system of the image recording device, so that modem training is performed in a situation similar to that of actual image information transmission. Therefore, the power state during modem training can be set to almost the same power state as during image information transmission, thereby achieving the effect that more accurate modem training can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a facsimile apparatus according to an embodiment of the present invention, FIG. 2(a) is a time chart showing an example of the procedure when a training error occurs during initial modem training, and FIG. ) is a time chart showing an example of the procedure when training is successful at the time of initial modem training, FIG. 3 is a flowchart showing an example of processing during modem training of the receiving facsimile machine, and FIG. 61i1 is a block diagram showing the facsimile apparatus according to the embodiment; FIG. 5 is a flowchart showing an example of processing executed by the sending facsimile machine during modem training in the embodiment shown in FIG. 4; 3 is a flowchart illustrating an example of processing performed by a facsimile machine during modem training. 1... System control unit, 4... Scanner, 5...
Plotter, 7... image storage device, 12, 13... motor. Figure (a) (b) Figure

Claims (2)

[Claims] (1) In a control system for a facsimile machine equipped with a Group 3 facsimile transmission function and an image storage function, a storage means that stores modem training judgment conditions when the image storage function is used and modem training judgment conditions when the image storage function is not used. When transmission is started with the transmitted image stored in the image storage function, the transmitting device notifies the receiving device to that effect, and the receiving device receives the request from the transmitting device to start transmission using the image storage function. A control method for a facsimile apparatus characterized in that, when notified, a modem training result is determined during modem training using modem training determination conditions when using the image storage function stored in the storage means. (2) In a control method for a facsimile device equipped with a Group 3 facsimile transmission function, during modem training, the transmitting device operates the drive system of the image reading means, and the receiving device operates the drive system of the image recording means. A control method for facsimile machines.