JPH0556234A - Facsimile transmission/receiving system - Google Patents

Abstract

PURPOSE:To eliminate wasteful communication time after the overflow of a receiving memory provided on, the receiving side and storing data from the transmission side. CONSTITUTION:A memory capacity management part 12 notifying the transmission side of the vacant storage capacity of a receiving memory part 13 is provided on the receiving side. A calculation circuit part 3 determining the amount of transmission data which is smaller than the vacant storage capacity of the receiving memory part 13 for each page of a transmission original corresponding to the contents of the notification, and a control part 2 and a modem part 1 which transmit the determined amount of data, are provided on the transmission side. Accordingly, the receiving memory capacity can be prevented from overflowing. Thus, the line disconnection in the course of the original page can be prevented and the time for transmitting the original to be disposed in the end even when it is transmitted can be eliminated.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a facsimile transmission / reception system, and more particularly to a transmission / reception system of a facsimile apparatus having a memory storage function.

[0002]

2. Description of the Related Art Generally, in a facsimile apparatus having a memory storage function, a transmission document is stored in a reception memory and then the stored content is printed. A transmission / reception system of the facsimile machine will be described with reference to FIG.

FIG. 2 is a block diagram showing the structure of a conventional facsimile transmission / reception system. In the figure, the conventional system includes a facsimile device 100 on the transmitting side and this device.
The receiving side facsimile apparatus 200 receives data from 100 via the exchange 300.

The facsimile apparatus 100 on the transmission side reads a document to be transmitted, a reading unit 9, an image processing unit 8 that processes the read image signal, and encodes / decodes the image signal. It includes a CODEC unit 7, a memory unit 6 for storing transmission image signal data, a control unit 2 for controlling the entire transmission side device, and a modem unit 1 for modulating / demodulating signals. There is.

On the other hand, the facsimile machine 200 on the receiving side is
It includes a modem unit 10 for modulating / demodulating signals, a control unit 11 for controlling the entire receiving side device, and a memory unit 13 for storing received image data.

In this structure, the reading section 9 on the transmission side
The original read by is converted into a predetermined signal and sent to the receiving side. On the receiving side, after the data is stored in the memory unit 13, printing is performed by a printing unit (not shown).

However, in this conventional system, when the receiver of the other party receives the memory during the facsimile transmission, and the transmitting side performs the memory transmission, the memory section 13 of the receiving side is
If some of the image signal data sent from the sending side cannot be received because some of the image signal data has already been used because the receiving side memory capacity is exceeded, the receiving side will disconnect the line even during the page of the sent document. The image signal data received in the memory in the middle of the page is discarded. Therefore,
At this time, the communication time for transmitting the discarded page is wasted. Further, since the line is disconnected due to a communication error, the receiving side has received up to some pages in the middle of the page, and it is not possible to know how many original documents should be received.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a facsimile transmission / reception system capable of eliminating wasteful transmission time.

[0009]

A facsimile transmission / reception system according to the present invention is a facsimile transmission / reception system which is provided on the receiving side and includes a receiving memory for accumulating data from the transmitting side, and the free storage capacity of the receiving memory provided on the receiving side. A means for notifying the sending side, a means provided for the sending side, for deciding a transmission data amount smaller than the free storage capacity of the receiving memory according to the contents of the notification, in units of transmission original pages, and a data for the decided amount And means for transmitting.

[0010]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a facsimile transmission / reception system according to the present invention, and the same portions as those in FIG. 2 are designated by the same reference numerals. In the figure, the facsimile transmission / reception system of the present embodiment is different from the conventional system (FIG. 2) in that the memory capacity management unit 12 that manages the memory storage capacity of the memory unit 13 on the reception side and the memory storage capacity of the reception side. An arithmetic circuit unit 3 for comparing and calculating (the free storage capacity of the memory unit 13) and the image signal data capacity in page units on the transmission side, and a data capacity management unit for managing the image signal data capacity in page units of the transmission original. 4 and a memory unit 5 for storing a fixed format for a notification message to the receiving side are added.

That is, the system of FIG. 1 is provided with a memory section 13 for storing the received image signal data and a memory section 6 for storing the image signal data of the original to be transmitted. Before the transmission operation, the memory capacity management unit 12 notifies the transmitting side of the free space of the memory, and the transmission data amount smaller than the free space is determined for each document page according to the contents of the notification. As a result, the capacity of the receiving side memory will not be exceeded. Therefore, the disconnection of the line does not occur in the middle of the page of the transmission document, the image signal is not discarded, and the wasteful communication time generated in the conventional system can be deleted.

The transmission operation of the system of this embodiment having the above configuration will be described in detail.

First, as a premise, the receiving side memory unit 13
It is assumed that the data storage capacity of is 3 [Mbit] and that data of 2 [Mbit] has already been stored.
As a result, the memory capacity management unit 12 recognizes that another 1 [Mbit] worth of data can be stored in the memory unit 13.

On the other hand, assuming that there are three originals to be transmitted from the transmitting side, the image signal data of the first original is 0.5.
[Mbit] If the image signal data of the second document is 0.3 [Mbi
t] It is assumed that the image signal data of the third image is 0.4 [Mbit]. Further, the fixed format data stored in the memory unit 5 for notifying the number of transmissions to the receiving side is 0.
It is assumed to be 1 [Mbit]. As a result, the data capacity management unit 4 informs the first document of 0.5 [Mbit], the second document of 0.3 [Mbit], the third document of 0.4 [Mbit], and the transmission number notification. It will be recognized that the data is 0.1 [Mbit].

When communication is started in the above state, the receiving side notifies the transmitting side of the free space of the memory section 13. In this case, the receiving side informs the transmitting side of the recognition contents of the memory capacity management unit 12 by using, for example, a procedure signal of a non-standard function identification signal (NSF) defined by CCITT T30.

On the transmission side, the contents recognized by the memory capacity management unit 12 from the reception side, that is, the empty capacity and the data capacity management unit 4
The contents of recognition, that is, the amount of data to be transmitted, is compared by the arithmetic circuit 3 and arithmetic operations are performed to determine the number of sheets that can be transmitted. That is, the free capacity of the memory unit 13 by the memory 12 is 1 [Mb
it], and the amount of data to be transmitted by the data capacity management unit 4 is 0.1 [Mbit] for the fixed format for notification, 0.5 [Mbit] for the first original, and 0.3 [for the second original. Mbit],
Since the third sheet has 0.4 [Mbit], the transmission data amount is determined so that the arithmetic expression “1 [Mbit] ≧ contents of data capacity management unit” is satisfied. In order for this formula to hold,
1 [Mbit] ≧ 0.1 [Mbit] +0.5 [Mbit] +0.3
[Mbit]. Therefore, in addition to the fixed format for notification, the first and second sheets of the document are determined as the data to be transmitted. In addition, as a message to the receiving side, the notification fixed format is used to notify that up to the second of the three transmission originals has been transmitted. Sender is sending original 2
CCITT at the time of sending the number and the fixed format for notification
Procedure end signal (EOP: End Of Proceed) defined by T30
send dure) to end the operation normally.

In other words, according to the system of this embodiment, when the receiver of the other party receives the memory in the facsimile transmission and the transmitter side performs the memory transmission, the memory portion of the receiver side is already used to some extent. Therefore, as it is, part of the image signal data of multiple sheets transmitted from the transmitter side,
When the receiver side cannot receive due to the memory capacity overrun, the receiver side calculates the fixed format for notification on the sender side that can be stored in the memory and the original storage capacity from the first page, and sends to the last page that the receiver side can receive. By doing so, it is possible to delete the communication time of this page which is discarded due to the receiving side memory capacity overflow in the middle of the page. Also, by sending a fixed format for notification at the same time, it is possible to notify how many more originals should be received.

[0019]

As described above, according to the present invention, the transmission data amount that does not exceed the capacity is determined in page units according to the free space of the receiving side memory unit, and by transmitting this, the page of the transmission original document is transmitted. There is an effect that the line disconnection does not occur on the way, the image signal is not discarded, and thus the wasteful communication time that has conventionally occurred can be deleted.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a facsimile transmission / reception system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional facsimile transmission / reception system.

[Explanation of symbols]

 1, 10 modem section 2, 11 control section 3 arithmetic circuit section 4 data capacity management section 5, 6, 13 memory section 12 memory capacity management section

Claims (1)

[Claims] 1. A facsimile transmission / reception system including a reception memory provided on the reception side for accumulating data from the transmission side, said means being provided on the reception side and notifying the transmission side of the free storage capacity of the reception memory. And a means for determining the amount of transmission data, which is smaller than the free storage capacity of the receiving memory, for each page of the transmission original document and provided for the transmission side, and means for transmitting the determined amount of data. Facsimile transmission / reception system characterized by.