JPH0946499A - Facsimile equipment having ecm function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the effective use of an ECM buffer and to improve the facilitation of a facsimile equipment by applying the memory function of the ECM buffer that is used at the time when an ECM is selected in accordance with the situation. SOLUTION: A facsimile equipment is provided with an image memory 25 which stores the image data and an ECM buffer 26 which temporarily stores the image data that are sent in ECM and also has an ECM function which corrects the error of the image data if they are not sent in a normal way. A system control part 11 sends the image data in ECM and in a short or normal frame based on the detection result of the remaining capacity of the memory 25 and also the size recognition result of the image data stored in the memory 25. The part 11 also secures an area 26b having the capacity necessary for the ECM transmission of the image data in the buffer 26 with other areas used as an extended area 26a of the memory 25 respectively when the image data are sent in a short frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine having an ECM function, and more particularly to a facsimile machine having an ECM function capable of effectively utilizing an ECM buffer used when ECM is selected as a transmission mode.

[0002]

2. Description of the Related Art Conventionally, there has been known a facsimile apparatus which reads image data from an original and transmits the image data via a communication line. The facsimile apparatus retransmits image data that has not been normally transmitted. There is one that has a so-called ECM (Error Correction Mode) function of correcting an error by means of an error correction.

When the ECM is selected as the transmission mode, this type of facsimile apparatus temporarily stores the image data to be transmitted in a dedicated ECM buffer and retransmits the image data transmitted from the receiving side first. When the requested information is sent, the image data requested to be retransmitted is read from the ECM buffer and retransmitted to the receiving side, and at the receiving side, the erroneous image data is returned by the retransmitted image data. It is designed to be rewritten and corrected. Such a facsimile machine is disclosed in, for example, Japanese Patent Laid-Open No.
JP-A-63942 discloses that a facsimile machine having this ECM function counts the number of retransmissions and changes the transmission mode to non-ECM to avoid an abnormally long communication time. are doing.

[0004]

However, in such a conventional facsimile apparatus having the ECM function, the ECM buffer is prepared for exclusive use when selecting the ECM, and therefore, for example, transmission Even when the image memory is full during the memory transmission for transmitting image data without setting the mode to ECM, the ECM buffer cannot be used even though it has a memory function.

Therefore, according to the present invention, the function of the ECM buffer as a memory is diverted depending on the situation, so that E
The purpose is to realize effective utilization of the CM buffer and improve convenience.

[0006]

In order to achieve the above object, the invention according to claim 1 is an ECM function for transmitting and receiving information requesting retransmission of image data that has not been normally transmitted and transmitting the image data again. A facsimile device having an image memory for accumulating image data, and an ECM buffer for temporarily storing image data transmitted in an ECM transmission mode, the remaining amount detecting device detecting a remaining amount of memory in the image memory. Means for recognizing the size of the image data stored in the image memory for ECM transmission, and E
ECM transmission control means for controlling the image data to be ECM-transmitted by a short frame or a normal frame based on the detection result and the recognition result at the time of CM transmission, and at least the capacity required for the ECM transmission by the short frame or more. And a memory area control means for ensuring the area other than the area as an extension area of the image memory.

According to the first aspect of the present invention, the memory remaining amount of the image memory detected by the remaining amount detecting means, and
Based on the size of the image data to be transmitted by the ECM recognized by the size recognition means, for example, when the memory remaining amount of the image memory becomes smaller than a preset remaining amount, the image data (of one page) is ECM based on the short frame.
When transmission is possible, the image data is ECM-transmitted by a short frame by the ECM transmission control means, and is otherwise ECM-transmitted by a normal frame. When performing ECM transmission by this short frame, the memory area control unit secures an area having at least the capacity necessary for the transmission in the ECM buffer, and the area other than the area is an extended area of the image memory.
Therefore, even if the remaining amount of the image memory becomes small due to other data accumulation or memory reception during ECM transmission, the size of each page to be transmitted is E due to the short frame.
When CM transmission is possible, the area of the ECM buffer other than the required capacity is set as an extension area of the image memory, so that the apparent capacity of the image memory can be increased.

According to a second aspect of the present invention, there is provided an image memory that has an ECM function of transmitting and receiving information requesting retransmission of image data that has not been normally transmitted and transmitting the image data again, and storing the image data. , An ECM buffer for temporarily storing image data transmitted in the ECM transmission mode,
A facsimile apparatus comprising: a remaining amount detecting means for detecting a remaining memory amount of an image memory; a mode changing means for changing a transmission mode of image data from ECM to non-ECM based on the detection result; And a memory area control unit that uses the ECM buffer as an extension area of the image memory when changed to a non-ECM.

According to the second aspect of the present invention, based on the memory remaining amount of the image memory detected by the remaining amount detecting means,
For example, when the remaining memory capacity of the image memory becomes less than the preset remaining capacity, the transmission mode of the image data is changed from ECM to non-ECM by the mode changing means, and the image data is non-ECM transmitted. Then, ECM transmission is performed. When performing this non-ECM transmission,
The ECM buffer is set as an extension area of the image memory by the memory area control means. Therefore, even when the remaining amount of the image memory becomes small due to other data accumulation or memory reception during ECM transmission, the ECM transmission is changed to non-ECM transmission and the ECM buffer becomes an extension area of the image memory. The apparent capacity of can be increased.

According to a third aspect of the present invention, there is provided an image memory for storing image data, which has an ECM function of transmitting / receiving information requesting retransmission of image data that has not been normally transmitted and transmitting the image data again. , An ECM buffer for temporarily storing image data transmitted in the ECM transmission mode,
A facsimile apparatus including: a remaining amount detecting means for detecting a remaining memory amount of an image memory; a mode specifying means for notifying a destination of no ECM function when receiving image data based on the detection result; and the ECM function. And a memory area control unit that uses the ECM buffer as an extension area of the image memory when the absence is notified.

According to the third aspect of the invention, based on the memory remaining amount of the image memory detected by the remaining amount detecting means,
For example, when the remaining memory capacity of the image memory becomes less than the preset remaining capacity, the other party at the time of receiving the image data is notified by the mode designating unit that there is no ECM function, and the image data is in the non-ECM receiving mode. Is received, and in other cases, ECM is received. When this non-ECM reception is performed, the ECM buffer is set as an extension area of the image memory by the memory area control means. Therefore, even when the remaining amount of the image memory becomes small due to other data accumulation or memory reception at the time of receiving the image data, the ECM buffer is set as an extended area of the image memory because the ECM function is not provided. The apparent capacity can be increased.

According to a fourth aspect of the present invention, there is provided an image memory that has an ECM function of transmitting and receiving information requesting retransmission of image data that has not been normally transmitted and transmitting the image data again, and storing the image data. , An ECM buffer for temporarily storing image data transmitted in the ECM transmission mode,
And a size recognizing means for recognizing a ratio of image data for each page stored in an image memory for ECM transmission to a whole of a preset size or less, and short-circuiting the image data based on the recognition information. ECM transmission control means for controlling ECM transmission by a frame or a normal frame, an area having at least a capacity necessary for the transmission in the ECM buffer when performing ECM transmission by a short frame, and an image memory other than the area. And a memory area control unit that is an extension area of.

According to the fourth aspect of the present invention, for example, based on the ratio of the image data for each page to be ECM-transmitted to the entire size equal to or smaller than a preset size (for example, a size capable of ECM transmission by a short frame), When the ratio is equal to or higher than a preset ratio (for example, a ratio in which the frame size can be changed to a short frame without any problem and ECM transmission is possible), the image data is ECM-transmitted by the short frame by the ECM transmission control means. Is transmitted by ECM. When performing ECM transmission by this short frame, the memory area control unit secures an area having at least the capacity necessary for the transmission in the ECM buffer, and the other areas are used as other memory areas. Therefore, when the ratio of the small size of the image data to be transmitted by ECM is large, the EC other than the capacity required for ECM transmission by the short frame is used.
Since the area of the M buffer is an extension area of the image memory used for other than ECM transmission, the apparent capacity of the image memory can be increased.

According to a fifth aspect of the present invention, an image memory for storing image data, which has an ECM function of transmitting and receiving information requesting retransmission of image data that has not been normally transmitted and transmitting the image data again, is provided. , An ECM buffer for temporarily storing image data transmitted in the ECM transmission mode,
A facsimile apparatus including: an inability detection unit that detects that the image data cannot be output; a time counting unit that measures an elapsed time after the disabled state; and an elapsed time set in advance. Transmission control means for setting the image data transmission mode to non-ECM after the specified time has elapsed, and E when the image data transmission mode is set to non-ECM.
And a memory area control unit that uses the CM buffer as an extension area of the image memory.

According to the fifth aspect of the present invention, the output of the image data from the image memory is detected by the disabling detection means to be in a disabled state due to, for example, a mechanical trouble (jam, door open, etc.). The elapsed time from is counted by the time measuring means, and the image data after this elapsed time exceeds the preset time is transmitted (transmitted / received) by the transmission control means in the non-ECM transmission mode. When this non-ECM transmission is performed, the ECM buffer is set as an extension area of the image memory by the memory area control means. Therefore, even if the image data cannot be output and the remaining amount of the image memory becomes small due to other data accumulation or memory reception, the image data is transmitted in the non-ECM transmission mode, and the ECM buffer is the extension area of the image memory. Therefore, the apparent capacity of the image memory can be increased.

According to a sixth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the state of use of the area where the ECM buffer is not used by the ECM is recognized during ECM reception. When the area is used, the situation recognizing means and the other party requesting the ECM reception when using the area E
While notifying that there is no CM function, when not in use, the other party is notified that there is an ECM function, and a memory use control unit that prohibits the use of the area other than the ECM buffer is provided. is there.

According to the sixth aspect of the present invention, the ECM recognized by the situation recognizing means when performing the ECM reception.
Based on the usage status of the area that is not used in the ECM of the buffer, the memory usage control means notifies the other party requesting the ECM reception that the ECM function is not used when the area is used, while it is not used when the area is not used. The other party is notified that the ECM function is available and the EC of the area
Use as anything other than the M buffer is prohibited. Therefore, even if the ECM transmission is supposed to be performed by a short frame and the capacity of the ECM buffer is apparently reduced, or if the ECM transmission is changed to the non-ECM transmission and the capacity of the ECM buffer is apparently disappeared, the usage status is changed. Accordingly, the image data can be received in the ECM or non-ECM reception mode.

According to a seventh aspect of the present invention, in addition to the configuration of the first aspect, the ECM buffer E
Data management means for managing the data accumulated in the area not used in the CM, and data processing means for preferentially processing the data accumulated in the area when processing the data based on the management information are provided. It is characterized by.

According to the invention of claim 7, the data stored in the area of the ECM buffer which is not used by the ECM is managed by the data management means, and when the data in the image memory is processed, it is based on the management information. Data accumulated in the area is preferentially processed by the data processing means. Therefore, E that is not used in ECM
Since the data accumulated from a part or the whole of the CM buffer is preferentially output, for example, when the image memory is restored from being unable to output, it is released immediately and its EC
ECM transmission can be performed with a frame size corresponding to the size of image data using the M buffer.

According to an eighth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, an EC for temporarily storing image data transmitted in an ECM transmission mode.
Equipped with two M buffers, and has ECM reception control means for using the ECM buffer as a single buffer or a double buffer at the time of ECM reception, and there is no area where the ECM reception control means is not used by the ECM at the time of ECM reception. The ECM buffer is used as a single buffer.

According to the present invention, the two ECM buffers for temporarily storing the image data to be transmitted by the ECM are provided when a part or all of one ECM buffer is an area not used by the ECM. When receiving ECM, the side without the area, that is, the other ECM buffer is used as a single buffer by the ECM reception control means, and when there is no area, both ECM buffers are used as double buffers. Therefore, the image data transmission mode is set to ECM by short frame.
Even if some or all of the ECM buffer is set to an area that is not used by the ECM due to a change in ECM transmission to non-ECM transmission, there is no limitation on the frame size, for example, image data in a normal frame. ECM reception can be performed.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a facsimile apparatus having an ECM function according to the invention described in any one of claims 1 to 8 and is a block diagram showing a basic overall configuration.

In the figure, 11 is a system control unit, and the system control unit 11 is an internal memory (ROM: Read Onl
The system controller 11 controls the respective parts of the apparatus based on a preset control program in the y memory), and the system control part 11 is a facsimile including transmission by ECM (Error Correction Mode) according to the G3 facsimile transmission control procedure. Image data is transmitted / received to / from the other party through communication. The system control unit 11 stores data necessary for executing the control program in a work area, a system memory 12 for storing system-required parameters and user registration data, and a document. A scanner 13 that reads image data to be transmitted at a predetermined resolution, a plotter 14 that records / outputs received / read image data and reports at a predetermined resolution on paper, and a FIFO (First-In First-Out) for G3 facsimile communication. ) And E
An image processing memory 15 that constitutes an ECM buffer used when selecting a CM and a line buffer that handles raw data on a line-by-line basis, and stores and processes image data; a network control unit 16 that is connected to a public telephone line network to automatically make and receive calls; Image data is modulated and demodulated to V17, V21, V29, V27ter, V3
3 or G3 FAX that performs G3 facsimile communication at a transmission speed of FSK (Frequency Shift Keying) mode
A modem 17, an image storage device 18 that stores image data when performing memory transmission (time designation transmission, etc.) and memory reception (proxy reception, confidential reception, etc.), and compresses and encodes raw image data, and Encoding / decoding unit 19 that decompresses encoded image data and decodes it into raw image data, and various keys for inputting the destination number of facsimile communication and inputting user registration, and a display for displaying various information The operation display unit 20 composed of a container is connected by a line bus 21.

Next, FIGS. 2 to 4 are views showing a first embodiment of a facsimile apparatus having an ECM function according to the invention described in claim 1. This embodiment is based on the structure shown in FIG. There is. In FIG. 1, the image processing memory 15 is
As shown in FIG. 2, an image memory 25 that stores image data encoded (compressed) as necessary, an ECM buffer 26 that temporarily stores image data to be ECM-transmitted, and the first input data first. FIF used when processing
Areas of an O buffer 27 and an LB (line buffer) 28 used when encoding raw image data in line units are secured, and the ECM buffer 26 transmits the image data by ECM transmission in normal frames. It is possible to secure a capacity of 64 kbytes.

Further, as shown in FIG. 3, the system memory 12 has a file management table 32 for storing management information in document units of image data to be transmitted in order to manage the image data stored in the image processing memory 15. , A page management table 33 storing management information for each page of the one document, and a management area 34 shown in FIG. 3C for storing memory remaining amount information of an unused area 25c of the image memory 25 are prepared. There is.
The file management table 32, as shown in FIG.
The current ready (waiting) / execution / end status 32a of the document to be managed, the document type 32b, the number of pages 32c in the document 32c, and the page management table 33 of the nth page of the document The pointer 32d indicates another parameter 32m for the document, the processing result 32n for the document, and the like. As shown in FIG. 3B, the page management table 33 includes page parameters 33a such as the linear density of the image data of the page, the paper width of the read document, the type of encoding, and the size of the image data of the page. The page size 33b, other parameters 33k related to the page, a pointer 33m indicating the position of the page in the image memory 25, a table pointer 33n indicating the page management table 33 of the next page, and the like. In the pointer 33m of the page management table 33, for example, the image data 25a for the first page (P.1) of the image data (PIX) for each page in the image memory 25 is indicated by A in FIG. The image data 25b of (P.2) is designed to store the head information (address) indicated by B, and the end of the page can be known from the page size 33b. The image memory 25 may be used so as to be sequentially cut out in units of 2 kbytes and called. In addition, as the type of the encoding method of the image data stored in the image memory 25, the MH (Modified Huffman) method, MR
(Modified READ) method or M ² R (Modified Mod)
ified READ) method.

Then, the system control unit 11 stores various information in the file management table 32 and the page management table 33 of the system memory 12 when executing facsimile communication including transmission of image data by ECM.
The remaining amount of memory in the unused area 25c of the image memory 25 is detected, and the information in the management area 34 is rewritten each time. The system control unit 11 executes normal facsimile communication, and the remaining amount detecting means. , Size recognition means,
The ECM transmission control means and the memory area control means are configured to perform ECM transmission of image data by a short frame or a normal frame based on various information of the file management table 32, the page management table 33 and the unused area 25c, and also a short frame. When carrying out ECM transmission by, the partial area of the ECM buffer 26 is made an extension area of the image memory 25.

The ECM transmission by the system control unit 11 confirms the ECM transmission designation (automatic selection at startup or selection input from the operation display unit 20) as shown in the flowchart of FIG. 4 (step P11). And the management area
When the remaining memory capacity of the unused area 25c stored in 34 is less than a preset specific value (a fixed value stored in the ROM or a set value arbitrarily rewritten in the system memory 12) (step P12) Check (recognize) the size of the image data within the page size 33b (step P1).
3) When the page size is 16 kbytes or less (step P14), the frame size for ECM transmission is set to 64 bytes of the short frame, and the area 26a other than the 16 kbyte area 26b required for the ECM transmission is set in the image memory 25. Management area to be used as an extension of
The remaining memory in 34 is set to + 48K bytes (Step P
15) After that, the normal ECM transmission procedure is performed.

On the other hand, in steps P12 and P14, when the remaining memory capacity of the image memory 25 is not less than the specified value, or when the image data to be transmitted by ECM within the page size 33b is 16 bytes.
If it exceeds k bytes, the frame size for ECM transmission is set to 256 bytes of the normal frame (step P16), and the normal ECM transmission procedure is performed. here,
The above steps P11 to P16 are performed at the start of transmission, and thereafter, a normal ECM transmission procedure may be performed, and image data may be transmitted by non-ECM if the other party does not have an ECM receiving function. Also, the page size is checked in step P14 because the number of transmitted documents is not limited to one, so the next page table pointer 33
It suffices to perform a sequential search based on n and check up to the last page of the document, and judge that ECM transmission by a short frame is possible when all pages are 16 kbytes or less. The frame size of 64 bytes or 256 bytes for ECM transmission may be set in the parameters 32m, 33k, or the like.

As described above, in this embodiment, when the ECM transmission is selected, the remaining memory capacity is set in advance based on the remaining memory capacity of the image memory 25 and the page size of the image data to be ECM transmitted and stored in the image memory 25. When the ECM transmission by the short frame or the normal frame is performed according to whether the size of the image data for each page is smaller than 16 k bytes or not, and the ECM transmission by the short frame is performed, 1 required
An area 26b of only 6 kbytes is secured in the ECM buffer 26, and the other area 26a is an extension area of the image memory 25. Therefore, even when the memory remaining in the image memory 25 becomes small due to other data accumulation or memory reception during ECM transmission, the area 26a of the ECM buffer 26 can be diverted and used effectively. By increasing the above capacity, it is possible to continue other accumulation and reception while preventing the occurrence of memory overflow while maintaining ECM transmission. As a result, convenience can be improved.

Next, FIGS. 5 and 6 are diagrams showing a second embodiment of a facsimile apparatus having an ECM function according to the invention described in claim 8. This embodiment is based on the configuration shown in FIG. 1 as a basic configuration. There is. Since the present embodiment has substantially the same configuration as that of the above-described first embodiment, the same reference numerals are given to the same configurations, the description thereof will be omitted, and the characteristic portions will be mainly described.

The image processing memory 15 shown in FIG.
As shown in FIG. 5, the areas of the image memory 25, the FIFO buffer 27, and the LB 28 are secured, and the ECM transmission (Tx) and the ECM are performed as in the first embodiment.
In addition to the ECM buffer 26 that is also used for reception (Rx), F
Like the IFO buffer 27 and the LB 28, the ECM buffer 36 having a fixed capacity (size) of 64 kbytes and used exclusively for ECM reception (Rx) is secured.

The system control unit 11 constitutes ECM reception control means in addition to the configuration of the first embodiment, and E
E using CM buffers 26 and 36 as double buffers
The CM transmission is executed, and when the area 26a of the ECM buffer 26 is an extension area of the image memory 25 during ECM reception, the ECM buffer 36 is used as a single buffer.

As shown in the flowchart of FIG. 6, the ECM reception by the system control unit 11 is such that when the ECM reception is started, the frame size of 64 bytes at the time of ECM transmission by the short frame is stored in the system memory 12. It is confirmed (step P21) that the frame size at the time of ECM transmission is set to a short frame so that when the area 26a of the ECM buffer 26 is an extension of the image memory 25, processing is performed as a single buffer (step P22). When the area 26a of the ECM buffer 26 is available for ECM transmission, it is set as a double buffer (step P23). After that, a normal receiving procedure is executed according to the setting of the single or double buffer to perform ECM reception.

As described above, in this embodiment, in addition to the effects of the first embodiment, even when the area 26a of the ECM buffer 26 is an extension of the image memory 25 as a short frame in ECM transmission, By using the ECM buffer 36 as a single buffer, there is no limitation on the frame size of image data, and for example, E
CM reception can be performed. Therefore, the ECM buffer 26 can be effectively used as appropriate without making the ECM reception impossible, and the convenience can be improved. The present embodiment can be similarly applied to the third to eighth embodiments described later, but the description thereof will be omitted.

Next, FIGS. 7 to 9 are views showing a third embodiment of a facsimile apparatus having an ECM function according to the invention described in claim 2. This embodiment is based on the structure shown in FIG. 1 as a basic structure. There is. Since the present embodiment has substantially the same configuration as that of the above-described first embodiment, the same reference numerals are given to the same configurations, the description thereof will be omitted, and the characteristic portions will be mainly described.

The image processing memory 15 shown in FIG.
Image memory 25, ECM buffer 26, FI
Each area of the FO buffer 27 and the LB 28 is secured, and the entire ECM buffer 26 can be used as an extension area 26a of the image memory 25. The system control unit 11 constitutes a remaining amount detecting unit, a mode changing unit and a memory area controlling unit, and when the remaining memory amount of the image memory 25 becomes smaller than the specific value, the ECM is designated as the transmission mode. 8 is used, the T.M.
The transmission mode is changed to non-ECM without instructing ECM transmission by the DCS signal (digital command signal) corresponding to the response signal sent from the other party during the 30 steps, and the ECM
The area 26a of the buffer 26 is adapted to be an extension area of the image memory. In FIG. 8, the CED signal is a called terminal identification signal, the DIS signal is a digital identification signal, the TCF signal is a training check, and the CFR signal is a reception preparation confirmation signal. 30
It is a transmission procedure signal of a part of the procedure.

In the ECM transmission by the system control unit 11, as shown in the flowchart of FIG. 9, even when the designation of the ECM transmission is confirmed (step P31), the remaining memory capacity of the unused area 25c in the management area 34 remains. If the value is less than the specified value in the ROM and is low (step P32),
In order to use the entire ECM buffer 26 as the area 26a and use it as an extension of the image memory 25, the remaining memory capacity in the management area 34 is extended to + 64K bytes (step P33),
Set the transmission mode to non-ECM (step P34)
Perform the normal procedure for M transmission. In step P31, E
If it is confirmed that the CM transmission is not designated, the process proceeds to step P34 to perform the non-ECM transmission normal procedure, and if the memory remaining amount is not less than the specific value at step P32, the normal process is performed. Perform ECM transmission procedure.

As described above, in this embodiment, when ECM transmission is selected, based on the remaining memory of the image memory 25,
The image data is transmitted by changing the transmission mode to ECM or non-ECM according to whether or not the remaining memory capacity is smaller than a preset specific value, and when the transmission mode is set to non-ECM, the ECM buffer 26 displays the image. Extended area of memory 25
26a. Therefore, when ECM transmission is selected, the image memory is
Even if the remaining memory capacity of 25 becomes low, the area 26a of the ECM buffer 26 can be diverted and used effectively, and the apparent capacity of the image memory 25 can be increased to, for example, transmit image data. Even when the memory reception is being carried out at the time of performing, the memory reception can be continued while preventing the occurrence of the memory overflow. As a result, convenience can be improved. In the present embodiment, the image memory 25
When the remaining memory capacity of the image memory becomes low, the image data cannot be transmitted by ECM transmission, but the extension area 26a of the image memory 25 can be made larger than that of the first embodiment, and simple transmission is possible. The effect that it can be controlled is also obtained.

Further, in the present embodiment, the transmission mode is changed to non-ECM at the start of the procedure as shown in the transmission procedure of FIG. 8. However, the present invention is not limited to this, and as shown in FIG. When the remaining memory capacity of the image memory 25 becomes smaller than the specific value at the start of the above step, the PPS-EOM signal is transmitted to the other party, and after the MCF signal is responded, the same procedure is performed to set the transmission mode to the non-operational state. It may be changed to ECM transmission. With this configuration, it is possible to more reliably prevent the image memory 25 from running out of memory and continue memory transmission. The PPS-EOM signal is a (procedure interruption signal) and the MCF signal is a message confirmation signal. This may be applied to the first embodiment described above and processed in the same manner.

Next, FIG. 11 shows E according to the invention of claim 3.
It is a figure which shows 4th Embodiment of the facsimile apparatus which has a CM function, and this embodiment makes the structure shown in FIG. 1 a basic structure. Since the present embodiment has substantially the same configuration as the above-described first embodiment, the description will be omitted by diverting FIGS. 2 and 3, and the description will focus on the characteristic part. In FIG. 1, the system control unit 11 constitutes a remaining amount detection means, a mode designation means, and a memory area control means, and includes an image memory.
When the remaining memory capacity of 25 becomes smaller than the specific value, even if the other party specifies ECM as the reception mode, the other party is notified that the ECM function is not available and the area 26a of the ECM buffer 26 is displayed. It is an extension area of the image memory.

As shown in the flow chart of FIG. 11, the ECM reception by the system control unit 11 is such that the remaining memory capacity of the unused area 25c in the management area 34 when the call is made from the other party is specified in the ROM. If it is less than the value (step P42), the entire ECM buffer 26 is used as the area 26a (extension of the image memory 25). After expansion (step P33), the other party is notified by setting no ECM function in the response signal (DIS signal shown in FIG. 5) (step P34), and the normal procedure for non-ECM reception is performed. If it is determined in step P42 that the remaining amount of memory is equal to or greater than the specific value, the normal EC
The presence of the M function is set in the response signal to notify the other party (step P45), and the normal ECM receiving procedure is performed. here,
In the present embodiment, the capacity of the ECM buffer is configured to be 64 kbytes, but the capacity of the ECM buffer shown in FIG.
When the double buffer (ECM buffers 26, 36) shown in (1) is used, the image memory 25 can be expanded by setting the remaining memory capacity in the management area 34 to +128 Kbytes.

As described above, in this embodiment, when the image data is received, the destination is determined based on the remaining memory capacity of the image memory 25, depending on whether the remaining memory capacity is less than a preset specific value. Is notified of whether the ECM function is available or not, and the image data is ECM-received or non-ECM-received.
When receiving, the ECM buffer 26 is an extension area of the image memory 25.
26a. Therefore, even when the image memory 25 has a small remaining memory when receiving the image data, the ECM
The area 26 of the ECM buffer 26 is set by eliminating the function.
a can be diverted and used effectively, the apparent capacity of the image memory 25 can be increased, and the memory reception can be continued while preventing the occurrence of memory over. As a result, convenience can be improved. Next, FIGS. 12 and 13 are diagrams showing a fifth embodiment of a facsimile apparatus having an ECM function according to the invention described in claim 4, and this embodiment is based on the configuration shown in FIG. Since the present embodiment has substantially the same configuration as the above-described first embodiment, the description will be omitted by diverting FIGS. 2 and 3, and the description will focus on the characteristic part.

The system memory 12 shown in FIG.
As shown in FIG. 5, in addition to the file management table 32, the page management table 33, and the management area 34, a size management table 45 for managing the image data size to be transmitted by ECM managed in document units in the file management table 32 is prepared. This size management table 45 is the size E table according to the present invention.
As a threshold value for determining whether or not to execute CM transmission, the ratio of a page having an image data size of 16 kbytes or less in a document is rewritable in advance to a ratio of 45a, and the entire document A flag 45b indicating whether or not the number of pages is equal to or more than a specified number, the number of pages of 16 kbytes or less in the document 45
c, 45d pages with more than 16k bytes, ECM of the document
Frame size to be transmitted 45e, and EC according to the present invention
It is composed of a prescribed number of rewritable sheets 45f or the like which is set to be rewritable in advance in order to determine whether or not to execute M transmission. The size management table 45 may be provided in the parameter 32m of the file management table 32, or may be provided separately from the file management table 32. The number of pages 45d may be the total number of pages in the document.

The system control section 11 constitutes a size recognition means, an ECM transmission control means, and a memory area control means, and according to the ratio of pages of image data of 16 kbytes or less among all pages in the image memory 25. Image data by ECM transmission in a short frame or normal frame, and when ECM transmission in a short frame is performed, the area other than the ECM buffer area 26b required for the ECM transmission, that is, the area 26a is a memory area that can be used for other purposes, such as an image. It is an extension area for accumulating data.

As shown in the flowchart of FIG. 13, the ECM transmission by the system control unit 11 detects the data size of each page when accumulating the image data in the image memory 25 for ECM transmission and detects 16 kbytes. In the following cases, the page number 45c is incremented (counted), and when it exceeds 16 kbytes, the page number 45d is incremented (counted).
The total number of d is stored in the management number 32c of the file management table 32, and it is confirmed whether the number of pages to be transmitted by ECM is 45f or more of the specified number in the size management table 45 (step P51). After setting "1" to the flag 45b, the number of pages 45c and the specified number of sheets 45f to 16k
The ratio (ratio) of pages of less than or equal to bytes to all pages is calculated, and it is checked (recognized) whether or not the ratio exceeds the set value stored in the ratio 45a (step P52). Then, the condition that the prescribed number flag 45b is set to "1" and the rate of the number of pages whose image data size is 16 kbytes or less exceeds the set value stored in the ratio 45a is satisfied (step P53). ) Sometimes E by short frame
64 bytes for frame size 45e for CM transmission
16 kbyte area required for ECM transmission that is stored in
In order to use the area 26a other than b as an extension of the image memory 25, the remaining amount of memory in the management area 34 is set to + 48K bytes (step P54), and then the normal ECM transmission procedure is performed. It should be noted that when ECM-transmitting a page of image data exceeding 16 kbytes, ECM transmission by a short frame may be repeated so that the image data received by the ECM at the other end can be connected.

On the other hand, in steps P51 and 53, the ECM
If the number of pages to be transmitted is small or the ratio of pages of 16 kbytes or less is small, 256 bytes is used as the frame size 45.
e (step P55), and the normal ECM transmission procedure is performed. As described above, in this embodiment, when ECM transmission is selected, the ratio is preset in the ratio 45a of the size management table 45 based on the ratio of the number of pages of image data of 16 kbytes or less to the entire page. When the ECM transmission by the short frame or the normal frame is executed depending on whether the value is equal to or more than the value and the ECM transmission by the short frame is performed, the necessary area 26b of only 16 kbytes is secured in the ECM buffer 26 and the other area is secured. 26a
Is an extension area of the image memory 25. Therefore, EC
In the case of a document in which the image data has a large proportion of small page numbers of 16 kbytes or less at the time of M transmission, the area 26a of the ECM buffer 26 can be diverted and effectively distributed and used. Increase the apparent capacity to E
It is possible to continue the storage and reception of other data while preventing the occurrence of memory overflow while maintaining the CM transmission. Further, in the present embodiment, when the number of pages to be ECM-transmitted is small or when the ratio of the pages of 16 kbytes or less is small, the ECM transmission only by the short frame is not executed, so that the communication time does not become long. . As a result, convenience can be improved.

Next, FIG. 14 shows E according to the invention of claim 5.
It is a figure which shows 6th Embodiment of the facsimile apparatus which has a CM function, and this embodiment makes the structure shown in FIG. 1 a basic structure. Since the present embodiment has substantially the same configuration as the above-described first embodiment, the description will be omitted by diverting FIGS. 2 and 3, and the description will focus on the characteristic part. In FIG. 1, the system control unit 11 constitutes an inability detection means, a time measurement means, a transmission control means, and a memory area control means, and, for example, when a paper jam occurs in the plotter 13 or a paper out occurs, or the apparatus main body. When it becomes impossible to output image data from the image memory 25 for recording image data due to mechanical trouble such as when the door is opened, etc., the elapsed time from when the image data cannot be output. Is measured by an internal timer, and after the elapsed time exceeds a preset time, image data is not received from the other party by non-ECM reception, and the ECM buffer is set as an extension area 26a of the image memory 25. To do.

In the ECM reception by the system control unit 11, as shown in the flowchart of FIG. 14, the ECM reception prohibition flag and the monitoring flag are not set when a call is made from the other party (steps P61 and P62). In this case, it is confirmed whether or not the mechanical trouble has occurred (step P63). When the mechanical trouble has not occurred, normal ECM reception is performed, while when the mechanical trouble occurs, the timer is set (driven). After setting the monitoring flag (step P64), normal ECM reception is performed.

Thereafter, when a call is made, the ECM reception prohibition flag is not set and the ECM reception is not prohibited (step P61), but the monitoring flag is set and the elapsed time is being monitored. In the case of (step P62), if the timer has not timed out and the elapsed time has not been exceeded (step P65), it is confirmed whether the previous mechanical trouble has been cleared (step P66). If not, normal ECM reception is performed. On the other hand, when the mechanical trouble is canceled, the monitoring flag is reset (step P67) and then the normal ECM reception is performed.

When the timer has timed out and the elapsed time has been exceeded in step P65, the remaining memory capacity in the management area 34 is set to +64 Kbytes in order to use the entire ECM buffer 26 as the extension area 26a of the image memory 25. After expanding the image memory 25 (step P68), E
The CM reception function is turned off, the ECM reception prohibition flag due to mechanical trouble is set (step P69), the other party is notified that there is no ECM function, and the normal procedure for non-ECM reception is performed.

After this, when a call is made, the EC
Since the M reception prohibition flag is set and ECM reception is prohibited (step P61), check whether the previous mechanical trouble has been canceled (step P70). If not, notify the other party that there is no ECM function. Then non-EC
Perform the normal procedure for M reception. Further, even if the mechanical trouble is cleared in step P70 but the image data is accumulated in the ECM buffer 26 and is being used as an extension of the image memory 25 (step P71), the other party is also notified that there is no ECM function. Perform the normal procedure for non-ECM reception. on the other hand,
If it is not being used as the image memory 25 at step P71, the ECM buffer 26 is returned to usable for ECM reception by setting the memory remaining amount in the management area 34 to -64 Kbytes (step P72), and then the ECM reception function is turned ON. At the same time, the ECM reception prohibition flag due to mechanical trouble is reset (step P69), the other party is notified that the ECM function is available, and the normal procedure for ECM reception is performed.

As described above, in the present embodiment, after the time elapsed after the image data cannot be output from the image memory 25 and recorded due to mechanical trouble exceeds the preset time, the image is not displayed. Data is received in non-ECM, at which time the ECM buffer 26
An extension area 26a of 25 is formed. Therefore, even if the image data cannot be output and the remaining amount of the image memory 25 becomes small, the apparent capacity of the image memory 25 is increased,
The image data can be stored in the extension area 26a of the ECM buffer 26, and for example, even if a jam occurs at night, the proxy reception can be performed while the memory capacity of the ECM buffer 26 is prevented from being excessive. Therefore, the ECM buffer 26 can be effectively used and convenience can be improved.

In the present embodiment, the case of ECM reception is described as an example, but it is possible to prevent ECM transmission during ECM transmission as well, and prevent memory overflow due to other accumulation or memory reception. Needless to say. Next, FIG. 15 is a diagram showing a seventh embodiment of a facsimile apparatus having an ECM function according to the invention described in claim 6, and this embodiment is based on the configuration shown in FIG. Since the present embodiment has substantially the same configuration as the above-described first embodiment, the description will be omitted by diverting FIGS. 2 and 3, and the description will focus on the characteristic part.

In FIG. 1, the system control unit 11 constitutes a situation recognition means and a memory use control means in addition to the configuration of the above-mentioned first or fifth embodiment, and is set to perform ECM transmission in a short frame. ECM while you are
When the image data is received, the image data is ECM-received or non-ECM-received according to the usage status of the ECM buffer 26. As shown in the flowchart of FIG. 15, the ECM reception by the system control unit 11 is performed when an E call is received from the other party.
Check if the frame size for CM transmission is set to 64 bytes (step P81), and set the frame size to 64 bytes.
When the area 26a of the ECM buffer 26 is set to the byte and is used as an extension area of the image memory 25, normal non-ECM reception is performed after notifying the other party of no ECM function (step P82), while setting in step P81. When the specified frame size is 256 bytes instead of 64 bytes, normal non-ECM reception is performed after notifying the other party that there is an ECM function (step P83). Since 256 bytes are set as the frame size in step P83, part or all of the ECM buffer 26 is not used as the extension area 26a of the image memory 25 (obviously prohibited).

As described above, in this embodiment, when performing ECM reception, part of the ECM buffer 26 is the image memory 25.
The other party is notified that the ECM function is not used when it is used as the extension area 26a of the device and that the ECM function is used when it is not used.
It is received in the reception mode by ECM or non-ECM according to the usage status of 26. Therefore, it is possible to prevent the area 26a used as an extension of the image memory 25 from being used as the ECM buffer 26 at the time of ECM reception, thereby improving convenience.

In the present embodiment, an example applied to the above-described first or fifth embodiment in which ECM transmission is performed by a short frame is described, but the entire ECM buffer 26 is used as the extension area 26a of the image memory 25. Needless to say, it is applicable to the embodiment. Next, Fig. 16
FIG. 9 is a diagram showing an eighth embodiment of a facsimile apparatus having an ECM function according to the invention of claim 7, and the present embodiment is based on the configuration shown in FIG. Since the present embodiment has substantially the same configuration as the above-described first embodiment, the description will be omitted by diverting FIGS. 2 and 3, and the description will focus on the characteristic part.

In FIG. 1, the system control unit 11 constitutes data processing means in addition to the configurations of the above-described first to seventh embodiments, and is an extension area 26a of the image memory 25 of the ECM buffer 26.
Whether or not the data is stored in the area 26a is managed by storing it in, for example, the parameter 32m of the file management table 32 or the parameter 33k of the page management table 33 which constitutes the data management means. Processing, for example, when transmitting the stored document to the memory or recording and outputting the received document, the data is preferentially output and processed.

The processing by this system control unit 11 is shown in FIG.
As shown in the flowchart of FIG. 5, there is an execution command for some processing, and the processing is memory transmission (step P9
1) Sometimes, the parameters 32m or 33k of the management tables 32, 33 are searched (searched) (step P92), and the presence or absence of the document to be transmitted to the memory accumulated in the area 26a of the ECM buffer 26 is confirmed (step P93). Preferentially cites (calls) the file document from the ECM buffer 26 (step P94), and if there is not, normal rank (sending rank)
Then, the file document is quoted from the image memory 25 (step P95) and the normal memory transmission procedure is performed.

On the other hand, even when the process having the execution instruction in step P91 is not the memory transmission but the substitute document output (step P96), the steps P92 to P95 are performed similarly to the case of the memory transmission, and the management table 32 is executed. , 33 is searched, the file document is intercepted and stored in the area 26a of the ECM buffer 26, the file document is preferentially quoted from the ECM buffer 26, and if there is not, the normal order (output order)
Then, the file document is quoted from the image memory 25 and the normal recording / output procedure of the received document is performed. If the process for which the execution instruction is issued is neither memory transmission nor proxy document output in step P96, the normal procedure of the process is performed. In the present embodiment, the case of memory transmission and proxy document output is described, but the present invention is not limited to this, and the ECM
It goes without saying that the present invention may also be applied to other processing for accumulating data in the area 26a of the buffer 26.

After this, the ECM buffer 26
Will be used depending on the remaining memory of the image memory 25 and the need for ECM transmission. As described above, in this embodiment, the data accumulated in the area 26a of the ECM buffer 26 is managed by the management table 32 or 33, and the image memory 25
When data is called from the inside and processed, it is processed preferentially, so part or all of the ECM buffer 26 area is processed.
26 is released preferentially even if data is accumulated, and the time used as an extension of the image memory 25 can be shortened. Therefore, when performing ECM transmission, the ECM buffer 26 can be used as usual, and the appropriateness can be improved.

[0061]

According to the first aspect of the invention, based on the memory remaining amount of the image memory and the size of the image data to be ECM-transmitted, for example, the memory remaining amount is small and the image data can be ECM-transmitted by a short frame. At this time, since an area having at least the required capacity for ECM transmission by the short frame is secured in the ECM buffer and the area other than the area is used as an extension area of the image memory, the apparent capacity of the image memory can be increased. It is possible to continue the accumulation and reception of other data while preventing the memory overflow while maintaining the transmission. Therefore, E
The CM buffer can be effectively used, and convenience can be improved.

According to the second aspect of the invention, based on the remaining memory capacity of the image memory, for example, when the remaining memory capacity becomes low, the transmission mode of the image data is changed from ECM to non-EC.
Since the ECM buffer is changed to M and the ECM buffer is used as an extension area of the image memory, the apparent capacity of the image memory can be increased. For example, even when the memory reception is performed during the ECM transmission, the image data transmission is performed. It is possible to continue memory reception while preventing occurrence of memory over while maintaining the above. Therefore, the ECM buffer can be effectively used and convenience can be improved.

According to the third aspect of the invention, based on the remaining memory capacity of the image memory, for example, when the remaining memory capacity is small, the other party requesting the reception of the image data is notified of the absence of the ECM function, and the image is displayed. Since the data is received in the non-ECM reception mode and the ECM buffer is used as an extension area of the image memory, the apparent capacity of the image memory can be increased, and the image data is received while preventing the memory over. be able to. Therefore, the ECM buffer can be effectively used and convenience can be improved.

According to the fourth aspect of the invention, the image memory is occupied by a small size of image data at a rate higher than the set rate, for example, ECM by a short frame.
When the image data of a size that can be transmitted is occupied by the ratio that can be transmitted by ECM without problem, an area of at least the required capacity for ECM transmission by the short frame is secured in the ECM buffer, and the area other than the area is stored in the image memory. Of the image memory, the apparent capacity of the image memory can be increased, and while the ECM transmission function is maintained, the image memory is extended to prevent the occurrence of memory overflow and to effectively distribute the memory capacity. be able to.
Therefore, the ECM buffer can be effectively used and convenience can be improved.

According to the fifth aspect of the present invention, when the image data cannot be output from the image memory, the image data is transmitted (transmitted / received) in the non-ECM transmission mode,
Since the ECM buffer is used as an extension area of the image memory, the apparent capacity of the image memory can be increased. For example, even when the image data cannot be recorded and output due to mechanical trouble, the memory is prevented from occurring while the image is being output. Data can be intercepted. Therefore, the ECM buffer can be effectively used and convenience can be improved.

According to the sixth aspect of the present invention, when ECM reception is performed when an area of the ECM buffer that is not used by the ECM is used, the other party requesting the ECM reception is notified of the absence of the ECM function. On the other hand, when it is not used, it notifies the other party that there is an ECM function and prohibits the area from being used as a region other than the ECM buffer. Therefore, ECM transmission is performed by a short frame, or ECM transmission is changed to non-ECM transmission. Even if part or all of the ECM buffer is used as an extension of the image memory, the image data is
Alternatively, it can be received in a non-ECM reception mode. Therefore, while effectively utilizing the ECM buffer, EC
The convenience at the time of receiving M can be improved.

According to the seventh aspect of the present invention, the data stored in the area not used by the ECM of the ECM buffer is managed, and when the data in the image memory is processed, the ECM is preferentially processed. The ECM buffer can be used for ECM transmission with a frame size corresponding to the size of the image data by promptly releasing a part or the whole area of the ECM buffer used as the image memory or other memory function because it is not used. Therefore,
The ECM buffer can be used effectively and the convenience can be improved.

According to the invention described in claim 8, when two ECM buffers are provided, and a part or all of one ECM buffer is an area not used by the ECM, the ECM buffer is used.
When receiving, the other ECM buffer is used as a single buffer, so when image data is ECM-transmitted by a short frame or ECM transmission is non-ECM.
Even when changing to transmission, ECM reception can be performed without limitation. Therefore, the ECM buffer can be used effectively and the convenience can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a facsimile apparatus having an ECM function according to the invention described in any one of claims 1 to 8 and is a block diagram showing a basic overall configuration thereof.

FIG. 2 is an image memory and E of a first embodiment of a facsimile apparatus having an ECM function according to the invention of claim 1;
It is a conceptual diagram explaining a CM buffer.

FIG. 3 is a conceptual diagram illustrating management of the data.

FIG. 4 is a flowchart illustrating the ECM transmission.

FIG. 5 is an image memory and E of a second embodiment of a facsimile apparatus having an ECM function according to the invention of claim 8;
It is a conceptual diagram explaining a CM buffer.

FIG. 6 is a flowchart illustrating the ECM reception.

FIG. 7 is an image memory and E of a third embodiment of a facsimile apparatus having an ECM function according to the invention of claim 2;
It is a conceptual diagram explaining a CM buffer.

FIG. 8 is a transmission sequence diagram illustrating the ECM transmission.

FIG. 9 is a flowchart illustrating the ECM transmission.

[Fig. 10] Fig. 10 is a transmission sequence diagram different from Fig. 8 for explaining another aspect.

FIG. 11 is a flowchart illustrating ECM reception of a fourth embodiment of a facsimile apparatus having an ECM function according to the invention described in claim 3.

FIG. 12 is a conceptual diagram illustrating data management of a fifth embodiment of a facsimile apparatus having an ECM function according to the invention described in claim 4.

FIG. 13 is a flowchart illustrating the ECM transmission.

FIG. 14 is a flowchart illustrating ECM reception of a sixth embodiment of a facsimile apparatus having an ECM function according to the invention of claim 5.

FIG. 15 is a flowchart illustrating ECM reception of a seventh embodiment of a facsimile apparatus having an ECM function according to the invention as claimed in claim 6.

FIG. 16 is a flowchart illustrating data processing of an eighth embodiment of the facsimile apparatus having an ECM function according to the invention described in claim 7.

[Explanation of symbols]

11 System control unit (remaining amount detection means, size recognition means, ECM transmission control means, memory area control means, ECM
Reception control means, mode changing means, mode designating means, size recognition means, inability detection means, clocking means, transmission control means,
(Situation recognition means, memory use control means, data processing means) 12 System memory 13 Scanner 14 Plotter 15 Image processing memory 16 Network control unit 17 G3 FAX modem 18 Image storage device 19 Encoding / decoding unit 20 Operation display unit 25 Image memory 26, 36 ECM buffer 26a area 32 file management table (data management means) 33 page management table (data management means) 45 size management table

Claims (8)

[Claims] 1. An ECM function for transmitting and receiving information requesting retransmission of image data that has not been normally transmitted and transmitting the image data again, and an image memory for storing the image data and a transmission mode by the ECM. A facsimile apparatus comprising: an ECM buffer for temporarily storing image data to be transmitted; a remaining amount detecting unit for detecting a remaining amount of image memory;
Size recognition means for recognizing the size of the image data stored in the image memory for CM transmission, and ECM transmission control for controlling the ECM transmission of the image data in short frame or normal frame based on the detection result and the recognition result during ECM transmission. Means and a memory area control means for ensuring an area of at least the capacity necessary for the transmission in the ECM buffer when performing ECM transmission by the short frame and for making the area other than the area an extension area of the image memory. A facsimile machine having an ECM function characterized by: 2. An image memory for storing image data, which has an ECM function of transmitting and receiving information requesting retransmission of image data that has not been normally transmitted and transmitting the image data again, and a transmission mode by ECM. A facsimile apparatus comprising: an ECM buffer for temporarily storing image data to be transmitted; a remaining amount detecting means for detecting a remaining amount of image memory; and a transmission mode of image data from ECM to non-ECM based on the detection result. A facsimile apparatus having an ECM function, comprising: a mode changing means for changing the transmission mode to a non-ECM mode; and a memory area control means for using an ECM buffer as an extension area of an image memory when the transmission mode is changed to a non-ECM. 3. An image memory for storing image data, which has an ECM function of transmitting and receiving information requesting retransmission of image data that has not been normally transmitted, and transmitting the image data again, and a transmission mode using the ECM. A facsimile device comprising an ECM buffer for temporarily storing image data to be transmitted, the remaining amount detecting means for detecting a remaining memory amount of an image memory, and an ECM to a destination when receiving image data based on the detection result.
A facsimile apparatus having an ECM function, comprising: a mode designating means for notifying that there is no function, and a memory area control means for making an ECM buffer an extension area of an image memory when notifying that there is no ECM function. 4. An image memory for storing image data, which has an ECM function of transmitting and receiving information for requesting retransmission of image data that has not been normally transmitted and transmitting the image data again, and a transmission mode by ECM. A facsimile apparatus having an ECM buffer for temporarily storing image data to be transmitted, the size recognition for recognizing a ratio of image data for each page accumulated in an image memory for ECM transmission to a size equal to or less than a preset size. And EC data of the image data by a short frame or a normal frame based on the recognition information.
ECM transmission control means for controlling to perform M transmission, and an area having at least a capacity necessary for the transmission when performing ECM transmission by a short frame is secured in the ECM buffer, and the area other than the area is used as an extension area of the image memory. E is provided with memory area control means
A facsimile machine having a CM function. 5. An image memory for storing image data, which has an ECM function of transmitting and receiving information for requesting retransmission of image data that has not been normally transmitted and transmitting the image data again, and a transmission mode by ECM. A facsimile device comprising an ECM buffer for temporarily storing image data to be transmitted, comprising an inability detection means for detecting that the image data cannot be output, and an elapsed time after the inability. Clocking means for clocking, transmission control means for setting the transmission mode of image data after the elapsed time exceeds a preset time to non-ECM, and transmission mode of image data for non-ECM
And a memory area control unit that uses the ECM buffer as an extension area of the image memory, and a facsimile apparatus having an ECM function. 6. A situation recognition means for recognizing a use situation of an area in which the ECM buffer is not used by the ECM at the time of ECM reception, and a partner requesting ECM reception at the time of use of the area based on the recognition information has no ECM function. While notifying
5. A memory use control means for notifying the other party that there is an ECM function when not in use and for prohibiting the use of the area other than the ECM buffer. A facsimile machine having the ECM function described in 1. 7. A data management means for managing data stored in an area of the ECM buffer which is not used by the ECM, and data for preferentially processing data stored in the area when processing the data based on the management information. A facsimile machine having an ECM function according to any one of claims 1 to 5, further comprising processing means. 8. An ECM buffer is provided for temporarily storing image data transmitted in an ECM transmission mode.
ECM reception control means for using the M buffer as a single buffer or a double buffer at the time of ECM reception, and using the ECM buffer on the side without an area where the ECM reception control means is not used by the ECM at the time of ECM reception as a single buffer 5. The facsimile apparatus having the ECM function according to claim 1, wherein the facsimile apparatus has the above-mentioned configuration.