JPH06152924A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To shorten the period of time from interruption request generation to interruption completion. CONSTITUTION:This facsimile equipment is provided with a buffer memory 15 for interruption for saving the data of a data buffer memory 14 at the time of transmitting an interruption request signal provided with a reservation number at a transmission side when an interruption request is generated and saving the data of the data buffer memory 14 at the time of receiving the interruption request signal at a reception side and a buffer memory control means 16 for the interruption for transmission-controlling the data of the buffer memory 15 for the interruption to a recording part 2 by the reservation number after setting the information of continuous transmission and the reservation number in the case of the continuous transmission from an interrupted part at the transmission side, receiving the information of the continuous transmission and the reservation number at the reception side and transfer-controlling the data of the buffer memory 15 for the interruption by the reservation number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus having an interrupt communication control function. In the facsimile apparatus, if it is necessary to preferentially perform transmission to another destination during transmission, the current communication is interrupted and then the transmission to another destination is performed. This is called interrupt communication.

At this time, it is desirable that the time from "interrupt request generation to interruption end" is short, but in conventional interrupt communication, since interruption of the currently transmitting page ends after transmission is completed, "interrupt request generation to interruption" There is a problem that the time until "end" becomes long and the time until the interrupt communication starts becomes long. Therefore, it is required to shorten the time from “interrupt request generation to interruption end”.

[0003]

2. Description of the Related Art FIG. 9 shows a sequence diagram of conventional facsimile communication. In FIG. 9, when the receiver receives an incoming call, the receiver's capability (reception speed capability, etc.) is determined by NSF (non-standard function) / DIS (digital identification signal) signal.
Notify me. When the transmitter receives the NSF / DIS signal, it transmits an NSS (non-standard function setting) signal to instruct the communication mode (transmission speed or the like).

These NSF, DIS and NSS signals are
It is called a procedure signal and is transmitted as a low-speed signal (in facsimile, it means a 300 bps signal) in order to ensure reliable transmission. After transmitting the NSS signal, the transmitter transmits a TCF (training check) signal. The TCF signal is N
A "0" signal of a high speed signal (2400 bps or more) designated by the SS signal is transmitted for 1.5 seconds.

When the receiver normally receives the TCF signal, it transmits a CFR (reception preparation confirmation) signal. Upon receiving the CFR signal, the transmitter shifts to PIX (image data) signal transmission. When an interrupt request is generated during PIX signal transmission, the transmitter will complete transmission of the page currently being transmitted, and
EOP (end of last page transmission) signal is transmitted. When the receiver normally receives the PIX signal, the receiver sends an MCF (normal reception end) signal. Upon receiving the MCF signal, the transmitter ends the communication by transmitting a DCN (line disconnection) signal.

Then, for example, in the case of file transmission, the transmitter transmits the remaining pages after the interrupt communication is completed.

[0007]

However, in such a conventional facsimile apparatus, when an interrupt request occurs, the interrupt communication is started after the transmission of the page being transmitted is completed, and therefore the interrupt communication is started. There was a problem that it took a long time to do. The present invention has been made in view of such conventional problems, and an object thereof is to shorten the time from the generation of an interrupt request to the end of interruption.

[0008]

FIG. 1 is a diagram for explaining the principle of the present invention. The present invention is intended for a facsimile apparatus that performs transmission processing or recording processing after compressing or decompressing data and storing it in the data buffer memory 14, and when an interrupt request occurs on the transmitting side, an interrupt request signal including a reservation number. When transmitting the data buffer memory 14
Buffer data for saving the data in the data buffer memory 14 when the receiving side receives the interrupt request signal, and the transmitting side continuously transmits in the case of continuous transmission from the interruption point. Information and the reservation number are set, and then the data of the interrupt buffer memory 15 is controlled to be transmitted by the reservation number, and the receiving side receives the continuous transmission information and the reservation number. Buffer memory control means 16 for controlling transfer of the data of the above to the recording unit 2
It is characterized by having.

[0009]

According to the facsimile apparatus of the present invention having such a configuration, the transmitting side transmits the interrupt request signal when the interrupt request is generated and sets the reservation number in the interrupt request signal. The data in the data buffer memory 14 is saved in the interrupt buffer memory 15 and managed by the reservation number.

When the receiving side receives the interrupt request signal, the data of the data buffer memory 14 is saved in the interrupt buffer memory 15, and at this time, it is managed by the notified reservation number. On the sending side, when continuing transmission from the interrupted point, after setting the information of continuous transmission and the reservation number,
Interrupt buffer memory 15 managed by reservation number
Send the data.

On the receiving side, when the continuous transmission information and the reservation number are received, the data in the interrupt buffer memory 15 managed by the notified reservation number is transferred to the recording unit 2 after one page is received and recorded. I do. Therefore, it is possible to shorten the time from the generation of the interrupt request to the end of interruption.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 2 to 8 are views showing an embodiment of the present invention.
First, the configuration will be described. In FIG. 2, 1 is a reading unit for reading image data, 2 is a recording unit for recording the image data, and 3 is a recording unit.
Is a compression unit for compressing image data, 4 is a decompression unit for decompressing the image data, 5 is an image data memory unit for storing the image data, 6
Is a memory control unit that controls the image data memory unit 5, 7 is a line control unit that controls the line 8, 9 is a modem unit that performs data demodulation, 10 is a communication control unit that performs communication control, and 11 is a data control unit. An operation unit for inputting, a display unit 12 provided in the operation unit 11 for displaying data,
Reference numeral 13 is a main control unit that controls each unit.

Reference numeral 14 is a data buffer memory. The data buffer memory 14 temporarily stores the data compressed by the compression unit 3 at the time of transmission, and temporarily stores the data expanded by the decompression unit 4 at the time of reception. Stored in. Reference numeral 15 is an interrupt buffer memory, and when an interrupt request is generated on the transmitting side in the interrupt buffer memory 15 and an interrupt request (IRQ) signal in which a reservation number is set is transmitted, the data in the data buffer 14 is saved. .

When the receiving side receives the IRQ signal, the data in the data buffer memory 14 is saved in the interrupt buffer memory 15. Reference numeral 16 denotes an interrupt buffer memory control unit serving as an interrupt buffer memory control unit. The interrupt buffer memory control unit 16 uses an identification bit of continuous transmission and a reservation in the NSS signal when continuous transmission is performed from the interruption point on the transmitting side. After setting the number, the transmission control of the data of the interrupt buffer memory 15 is performed by the reservation number.

The interrupt buffer memory control unit 16 is also provided.
When the receiving side receives the continuous transmission identification bit and the reservation number, the interrupt buffer memory 1
The data of No. 5 is controlled to be transferred to the recording unit 2. Next, in FIG.
The structural example of a RQ signal is shown. In FIG. 3, F is a flag (fixed to 7Eh), A is an address field (fixed to FFh), and C is a control field (fixed to 13h).

The FCF indicates a facsimile control field, and an appropriate value of 1 byte indicating an IRQ signal is set in this facsimile control field. FIF indicates a facsimile information field, and a reservation number of 0 to 255 is set in this facsimile information field. Next, FIG. 4 shows a configuration example of the NSS signal.

In FIG. 4, in the facsimile information field (FIF), a continuous transmission identification bit (1 bit,
For example, 0 is normal transmission and 1 is continuous transmission), and reservation numbers 0 to 255 are set. With this reservation number, as shown in FIG. 5, the interrupt buffer memory 15 is managed.

Next, the operation will be described. FIG. 6 is a sequence diagram of communication in this embodiment. In FIG. 6, the transmitter is
When an interrupt request is generated during the transmission of the PIX (image data) signal, the transmission is immediately stopped and the IRQ (interrupt request) signal is transmitted. The receiver transmits an MCF (normal reception end) signal when the PIX (image data) signal is normally received. When the transmitter receives the MCF (normal reception end) signal, it transmits a DCN (line disconnection) signal to end the communication.

Next, the data processing on the transmitting side will be described with reference to FIG. In FIG. 7, the data read from the reading unit 1 or the image data memory unit 5 is compressed by the compression unit 3 and transferred to the data buffer memory 14. The data in the data buffer memory 14 is transmitted by the communication control unit 10. When an interrupt request occurs, data buffer memory 1
The untransmitted data in 4 is the interrupt buffer memory 15
The communication is interrupted by transmitting the IRQ signal.

When the interrupt communication is completed, the data in the interrupt buffer memory 15 is transferred to and transmitted to the communication control unit 10 for transmission from the interrupted point. Next, the data processing on the receiving side will be described with reference to FIG. In FIG. 8, the data received by the communication control unit 10 is decompressed by the decompression unit 4 and temporarily saved in the data buffer memory 14.
Then, after receiving one page, the data is transferred to the recording unit 2 and recorded.

When the IRQ signal is received, the data in the data buffer memory 14 is saved in the interrupt buffer memory 15 and the line 8 is disconnected. After that, when the communication is restarted and all the continuous data is transferred to the data buffer memory 14, the data in the interrupt buffer memory 14 is transferred to the recording unit 2 and then the data in the data buffer memory 14 is transferred to the recording unit 2. Then, recording for one page is performed.

Next, the data exchange between the transmitter and the receiver will be described more specifically. The transmitter sends an IRQ signal when an interrupt request occurs. F of this IRQ signal
Reservation number (1 byte represents 0 to 255 in IF.
Each device shall always send a different reservation number. )
Set. By controlling the reservation number, it is possible to easily manage when a plurality of interrupts occur. The management of reservation numbers is shown in FIG.

When transmitting the IRQ signal, the transmitter saves the data in the data buffer memory 14 in the interrupt buffer memory 15. At this time, the transmitter manages the reservation number notified by the IRQ signal. When the receiver receives the IRQ signal, it saves the data in the data buffer memory 14 in the interrupt buffer memory 15. At this time, the receiver manages the reservation number notified by the IRQ signal.

After the interrupt communication is completed, continuous transmission is carried out from the interrupted point, but the identification bit for continuous transmission is set to NS.
Set to S signal. For example, setting 1 indicates continuous transmission. The transmitter sets the bit of continuous transmission of the NSS signal to 1 if it is continuous transmission from the interruption point, and further sets the reservation number. The value notified by the IRQ signal is set to this reservation number.

After that, the transmitter transmits the data in the interrupt buffer memory 15 managed by the reservation number.
The receiver receives one page of data in the interrupt buffer memory 15 managed by the notified reservation number, and then
The data is transferred to the recording processing unit 2 and recorded. With the above control, communication can be easily continued even when a plurality of interrupt requests occur.

In this way, when the interrupt request is generated, the time from "interrupt request generation to interruption end" can be shortened.

[0027]

As described above, according to the present invention, when an interrupt request occurs during transmission, the transmission is immediately interrupted, an interrupt request signal is transmitted, and untransmitted data is buffered for interruption. Since the data is saved in the memory and retransmitted, the time from the generation of an interrupt request to the end of interruption can be shortened.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration example of an IRQ signal.

FIG. 4 is a diagram showing a configuration example of an NSS signal.

FIG. 5 is a management diagram of data in an interrupt buffer memory.

FIG. 6 is a sequence diagram of a communication procedure.

FIG. 7 is a data processing diagram on the transmitting side.

FIG. 8 is a data processing unit on the receiving side.

FIG. 9 is a conventional sequence diagram.

[Explanation of symbols]

1: reading unit 2: recording unit 3: compression unit 4: decompression unit 5: image data memory unit 6: memory control unit 7: line control unit 8: line 9: modem unit 10: communication control unit 11: operation unit 12: Display unit 13: Main control unit 14: Data buffer memory 15: Interrupt buffer memory 16: Interrupt buffer memory control unit (interruption buffer memory control means)

Claims (1)

[Claims] 1. A facsimile apparatus for transmitting or recording data after compressing or decompressing the data and storing the compressed data in a data buffer memory (14). When an interrupt request occurs on the transmitting side, an interrupt request including a reservation number is issued. An interrupt buffer memory (15) that saves the data in the data buffer memory (14) when transmitting a signal, and saves the data in the data buffer memory (14) when the receiving side receives the interrupt request signal In the case of continuous transmission from the interrupted point, the transmitting side controls the transmission of the data in the interrupt buffer memory (15) by the reservation number after setting the information of continuous transmission and the reservation number, and the continuous transmission on the receiving side. Received the information and reservation number of
Depending on the reservation number, the interrupt buffer memory (15)
Facsimile apparatus comprising an interrupt buffer memory control means (16) for controlling transfer of the above data to a recording section (2).