JPS62209974A - Facsimile communication system - Google Patents

Abstract

PURPOSE:To avoid the interruption of communications due to the shortage of memory by deciding the size of capacity received from a receiver and that of transmitted image information. CONSTITUTION:When a transmission side dials to a reception side, the reception side receives a ringing signal R1, automatically responds to it, and transmits a nonstandard device signal NSF and a digital identification signal DIS following a callee station identification signal CED to the transmission side. The nonstandard device signal NSF is an option signal for identifying a specific user's request. With the aid of said signal, the capacity that the receiver can receive image information, that is, the capacity that a memory can store image information, is reported. Accordingly the transmission side can know the capacity that the receiver can receive image information, deciding the nonstandard device signal NSF, and compares it with the capacity of transmitted image information. If the latter is smaller, a nonstandard device setting signal NSS is transmitted. Prior to the actual transmission of image information, the receiver can previously know the capacity of received image information, whereby it can secure the memory corresponding to the capacity of image information.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to facsimile communication, and particularly to a communication system for image information between memories.

[Conventional technology]

Conventionally, in the facsimile communication system that communicates image information between the woodcutter's memories, the transmitter does not know how much free space is available in the receiver's memory to store image information, and the receiver cannot communicate the image information received from the transmitter. Since the capacity of the receiver is not known, if the image information is communicated as is, the capacity of the image information to be transmitted may be larger than the storage capacity of the memory of the receiver.

[Problem that the invention seeks to solve]

In the conventional method described above, even if the amount of image information to be transmitted is larger than the storage capacity of the receiver's memory, the transmitter does not know how much free space is available in the receiver's memory to store the image information. In addition, since the receiver does not know in advance the amount of image information it will receive, it does not know the amount of memory it should reserve for reception, so it may receive image information without allocating sufficient memory. There was a drawback that memory shortage occurred in the receiver during communication of image information, and communication was interrupted.

[Means for solving problems]

In the facsimile communication system of the present invention, in communication of image information between memories, the receiver has means for notifying the transmitter of the receivable capacity of the memory before communicating the image information, and the transmitter The apparatus has means for notifying the receiver of the capacity of the image information to be transmitted, and means for determining the size of the capacity received from the receiver and the capacity of the image information to be transmitted.

〔Example〕

Next, an example of the present invention will be explained with reference to the drawings.

FIG. 1(B) is a basic block diagram for implementing the present invention, and 81 is a block diagram of a facsimile transmitter using a telephone network. (81 is a block diagram of a facsimile receiver using a telephone network.

The operation of Figure 1 (B) will be explained in the following order.

Tl) Image information storage in facsimile receiver (2)
1 Communication between facsimile transmitter and facsimile receiver (3) Image information recording in facsimile receiver First, image information storage in the facsimile transmitter will be explained.

The document is read in the reading section 1 according to instructions from the first main control section 6, the read image information is encoded in the encoding section 2, and the encoded image information is stored in the first memory 3. do.

In the first memory 3, the capacity of the stored image information and the capacity that can be further stored are managed, and the first main control unit 6 can be notified as necessary.

Next, communication between the facsimile transmitter and the facsimile receiver will be explained. The image information stored in the first memory 3 is stored in the first memory 3. The signal is modulated in the modulation/demodulation unit 4 of the main controller 4, and then demodulated in the second modulation/demodulation unit 10 via the second line control unit 11 under the control of the second main control unit 12 via the line. The data is stored in the memory 9 of No. 2. In the second memory 9, the capacity of the stored image information and the capacity that can be further stored are managed, and the second main control unit 12 can be notified as necessary.

The image information stored in the first memory 3 is transmitted under the control of the first main control section 6 according to the calling procedure 9 receiving procedure 1 communication procedure described below.

In the calling procedure, the first main control section 6 notifies the first line control section 5 of dialing information of the receiver, and upon receiving this, the first line control section 5IIi dials. In the incoming call procedure, the second line control unit 11 detects a ringing signal and
The second main control unit 12 is notified of the incoming call. In the case of transmitting a procedure signal, the first main control section 6 notifies the first modulation/demodulation section 4 of the procedure signal, and in response to this, the first modulation/demodulation section 4 performs modulation and performs the first line control. 5 onto the line. In the case of receiving a procedure signal, the procedure signal received from the line through the second line control section 11 is demodulated in the second modulation/demodulation section 10 and notified to the second main control section 12.

The communication procedure will be explained using FIG. 2.

The second position is a diagram showing a communication procedure in a normal state and FIG. 2 (Bl is a diagram showing a communication procedure in an abnormal state.

The procedure signals used in Figure 2 (5), 03) are CC
It complies with ITT recommendation T30. When dialing is performed from the transmitting side to the receiving side, the receiving side automatically responds upon receiving the ringing signal RI, and sends the called station identification signal CEDK, non-standard equipment signal N8F, and digital identification signal DIS.
is sent to the sending side. Non-standard equipment signal N8F is an optional signal used to identify specific user requests.

The receiver is notified of the capacity of image information that can be received, that is, the capacity of memory that can store image information. Therefore.

On the transmitting side, the capacity of image information that can be received by the receiver is determined by determining the non-standard device signal NSF.

The size is compared with the capacity of the image information to be transmitted, and if the latter is smaller, a non-standard device setting signal NS8 is sent. The non-standard device setting signal NS8 is an optional signal for identifying a specific user's request, and is used to notify the capacity and parameters of the image information to be transmitted.

When the transmitting side determines the non-standard device signal NSF, if the capacity of the image information to be transmitted is larger than the capacity of image information receivable by the receiver, the line disconnection command signal DCNt is sent and the line is disconnected.

The receiving side receives the non-standard device setting signal NSS.

This is determined and memory is stored in an amount corresponding to the capacity of image information to be received and the capacity of image information to be relied upon by 9%. The subsequent procedure follows the standard CCI'I'T Recommendation T: Procedure Recommendation -
Following the non-standard device setting signal NSS, the transmitting side issues a training check signal TCrt-i, and upon receiving this, the receiving side sends out a reception confirmation signal CFE. Furthermore, the sending side that receives this sends out the image information.

Finally, image information recording in the 7-axis receiver will be explained.

The image information stored in the second memory 9 according to instructions from the second main control section 12 is zero-coded in the decoding section 8, and the decoded image information is recorded and outputted in the recording section 7.

〔Effect of the invention〕

As explained above, in the present invention, since the receiver knows in advance the capacity of the image information to be received before actually communicating the image information C, it is possible to secure memory corresponding to the capacity of the image information, and the transmitter can receive the image information. Since the receivable capacity of the device is known in advance, by comparing the capacity and size of the image information to be transmitted, it is possible to avoid interruptions in communication due to insufficient memory on the receiving device during image information communication.

[Brief explanation of drawings]

Figure 1 (B) shows an embodiment of the present invention, in which Figure 1 is a facsimile transmitter and Figure 1B is a facsimile receiver.
The block diagram in Fig. 2) shows the procedure for communication between terminals, and % shows the procedure when normal, and β) shows the procedure when abnormal. 1... Reading section, 2... Encoding section, 3.
...First memory %4...First modulation/demodulation section %5...First time Line control section, 6...
...First main control section, 7... Recording section, 8...
...Decoding section, 9...Second memo 17.1
0...Second modulation/demodulation section, 11...Second
line control unit, 12... second main control unit.
/-7 Agent Patent Attorney Hara Uchi
Fifth.゛・-1. (A) Fist sending side Receiving side control (A) etc. 2 II 10 F 8 71 Koichi Zuzu Shidoku CB) Tsukasa

Claims (1)

[Claims] Image information between a facsimile transmitter that can transmit image information stored in memory in advance and a facsimile receiver that can store received image information in memory. In facsimile communication, the receiver is equipped with means for notifying the transmitter of the receivable capacity in memory before receiving image information, and the transmitter informs the receiver of the capacity of the image information to be transmitted based on the image information. A facsimile communication system characterized by comprising means for notifying before transmitting information and means for determining the size of the capacity received from a receiver and the capacity of image information to be transmitted.