KR100245024B1 - Memory transmission/ receiving method in facsimile - Google Patents

Abstract

If both the destination and the destination are facsimile with memory transmission / reception functions, the minimum scanning time per line for transmitting image data is set to the minimum value, so that only pure real image data can be transmitted without adding additional image data. It was made.

Therefore, the communication time by the additional image data added can be shortened.

Description

Fax Memory Transmit / Receive Method

The present invention relates to a method of transmitting / receiving a memory of a facsimile, and more particularly, in a process of transmitting / receiving image data between a facsimile of a destination having a memory transmission / reception function and a facsimile of a destination, the size of the image data being small. In this case, the present invention relates to a facsimile memory transmission / reception method for shortening a communication time by setting a minimum transmission time to a minimum value.

In recent years, as fax communication becomes general, much information is exchanged through facsimile. Especially for documents that need to be processed quickly, the exchange of information through facsimile is very effective, thereby greatly improving work efficiency.

As information exchange through facsimile is performed very frequently, memory is installed in the facsimile to improve the reception rate of the information or to exchange a large amount of information. This enables memory transmission / reception of specific documents.

As mentioned above, information exchange through facsimile is roughly divided into a document transmission / reception method and a memory transmission / reception method. At this time, in order to adjust the scanning time of the image data, the coding and decoding time of the image data, the printing time of the image data, etc., between the destination and the fax of the destination, 'Will be set.

The minimum transmission time is a condition for adjusting the capability difference (scanning time, coding / decoding time, printing time, etc.) between the destination fax and the destination fax. At the destination, the original is scanned and sent to the destination, and the destination is sent from the destination. When printing an original immediately (when sending / receiving by original), this is the minimum time to match the processing speed of the destination and the processing speed of the destination.

Therefore, in the case of the conventional facsimile in which the original transmission / reception method is applied, even if the size of the image data is smaller than the minimum transmission time, additional image data (Dummy Image Data) is added to the actual image data so as to meet the minimum transmission time. Including sending and receiving work.

On the other hand, in the case of the conventional facsimile using the memory transmission / reception method, since scanning, coding / decoding, and printing are not performed in real time, there is no need to match scanning time, coding / decoding time, and printing time. Nevertheless, when the size of the image data is small, it is designed to carry out the transmission / reception operation by adding additional image data to the actual image data, similarly to the transmission / reception method by the original.

By the way, the conventional facsimile having a transmission / reception function using a memory causes the following problems.

(1) The fax of the transmission / reception method using the memory does not need to match the scanning time, coding / decoding time, printing time, etc., since scanning, coding / decoding, and printing are not performed in real time. When the size of the image data is small, the transmission time is increased by the size of the additional image data because the image is designed to perform additional transmission / reception work by including additional image data in the actual image data, similar to the original transmission / reception method. do. For example, assuming that the minimum transmission time is 5 [ms] and the modem's transmission speed is 14400 [bps], even if the size of the image data for one line is small, at least 9 [ bytes] should send more image data.

(2) As the transmission time increases by the size of the additional image data, unnecessary communication cost occurs.

Accordingly, an object of the present invention is to solve such problems, and an object of the present invention is to transmit and receive only pure real image data to which additional image data is not added by minimizing a minimum transmission time in a fax of a transmission / reception method using a memory. It also provides a facsimile memory transmission / reception method to reduce transmission time and communication cost.

1 is a schematic block diagram of a facsimile applied to the present invention;

2 is a diagram illustrating elements constituting a minimum transmission time based on Recommendation T.4 of the ITU-T;

3 is a diagram showing the bit contents of a protocol for setting a transmission scanning time based on Recommendation T.30 of the ITU-T;

4 is a diagram showing a communication state between a destination fax and a destination fax;

5 is a flowchart illustrating a method of performing a memory transmission / reception method of a facsimile according to the present invention.

<Description of the code | symbol about the principal part of drawing>

1: CPU 2: Memory

3: operation panel 4: scanner

5: Modem 6: Network Control Unit (NCU)

7: Printer 8: Sensor

The present invention for achieving the above object is, when a communication path is formed between the transmission destination and the destination, and transmits a CED tone to the transmission destination to notify that the communication path is connected in its fax at the destination; If the destination adopts a memory using a reception method using a memory, the destination requests the transfer destination to set a minimum scanning time per line to a minimum value, and sends a DIS frame from the destination to the destination to inform the destination of the reception capability of the destination fax; At the transmission destination, setting the transmission form to be actually transmitted at the transmission destination, setting the minimum scanning time per line to the minimum value, and transmitting the set transmission mode and the minimum scanning time per line to the destination through the DCS frame; Transmitting, at the transmission destination, the TCF data for transmitting the zero data for a predetermined time at the transmission rate set in advance for the line training; Sending a CFR frame, which is a response signal that the TCF data was successfully received at the transmission speed, to the transmission destination; When the CFR frame is received at the transmission destination, the image data is transmitted to satisfy the minimum scanning time per line at the set transmission rate.

In the present invention, the destination requests the transfer destination to set the minimum value of the minimum scanning time per line to '0' [milliseconds], and the transfer destination sets the minimum scanning time per line to '0' [milliseconds] at the request of the destination. Set to match the capability of the destination.

Hereinafter, a preferred embodiment of the facsimile memory transmission / reception method according to the present invention will be described in detail with reference to the accompanying drawings.

1 shows a schematic block diagram of a facsimile applied to the present invention.

The facsimile as shown in FIG. 1 includes a central processing unit 1 which generally controls the facsimile according to a set program, program data, protocol data, text data, work contents related to transmission and reception, and the like. And a memory (2) for accessing or storing data under the control of the central processing unit (1), and a plurality of keys to generate the key data of the facsimile. (OPE) operation panel (OPE) including a display device so that the display data of the central processing unit 1 can be displayed, and the original data is scanned and converted into digital image data. After the control of the scanner 4 and the central processing unit 1 provided to the central processing unit 1, the output data of the central processing unit 1 is modulated and output in analog form, and Modem (5) for demodulating and outputting the input signal of the type, and is operated under the control of the central processing unit (1), the call loop of the Public Switching Telephone Network (PSTN) (consisting of Ring and Tip) A network control unit (NCU) 6 for interfacing signals between the modem 5 and the general telephone network, and a printer for printing fax data received by a control signal from the central processing unit 1 ( 7) and a sensor unit 8 which detects the remaining amount of recording paper or detects a document and provides it to the central processing unit 1.

Each of these components is the same as the configuration of a general facsimile, so a detailed description thereof will be omitted, and only essential components applied to the present invention will be described.

Referring to Figures 2 to 4 with respect to the operation of the present invention having such a configuration as follows.

First, FIG. 2 illustrates elements constituting the minimum transmission time based on Recommendation T.4 of the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T).

As shown in FIG. 2, the minimum transmission time refers to a minimum time required for transmitting / receiving contents including end-of-line (EOL) to distinguish each line of image data and actual image data. That is, the transfer destination refers to the minimum time for scanning one line of the original, and the destination refers to the minimum time for printing one line of the image data.

In addition, FIG. 3 sets a minimum scan line time per line based on Recommendation T.30 of the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T). Bit contents of the protocol to be shown are shown.

As shown in FIG. 3, the minimum transmission time is set to 20 [m], 40 [m], 10 [according to data of the 21st, 22nd and 23rd bits representing the Digital Identification Signal (DIS) and the Digital Command Signal (DCS). ㎳], 5 [㎳], 0 [㎳].

4 is a diagram illustrating a communication state between a destination fax and a destination fax, and FIG. 5 is a flowchart illustrating a method of performing a memory transmission / reception method of a fax according to the present invention.

First, when a call path is formed between a sender and a receiver (S1), the receiver transmits a Called Station Identification (CED) tone to the sender (S2) in order to indicate that the call path is connected in its facsimile. Thereafter, the receiver transmits a Digital Identification Signal (DIS) frame to the transmission destination to inform the transmission destination of the reception capability of the destination fax such as the transmission speed / compression method / resolution / minimum scanning time per line of the modem. At this time, if there is a memory 2 for storing the image data at the destination (S3), since the time for printing the image data is not required during reception, the minimum scanning time per line is set to the minimum value (for example, '0 [㎳]. ] ') To request the transfer destination (S4).

In the destination, check the contents of the DIS frame of the destination, compare the parameters set in the destination with the parameters of the destination, and set parameters such as transmission speed, compression method, resolution, and minimum scanning time per line for actual transmission. It is set and sent to the destination through a DCS frame (S5). At this time, if the destination fax adopts a memory transmission / reception method, there is no need to scan the original, so the minimum scanning time per line is set to a minimum value (for example, '0 [㎳]'), and the print speed of the destination is set. Set the minimum scanning time per line to satisfy the minimum and send it to the destination so that only the pure image data can be synchronized.

Thereafter, the transmission destination receives TCF (Training Check) data that transmits zero data (no data without any data) for a predetermined time (approximately 1.5 seconds) at a transmission speed of a modem set for line training. The receiver transmits a CFR (Confirmation To Receiver) frame, which is a response signal indicating that the TCF data has been successfully received, at the transmission speed of the modem set at the transmission speed (S6).

When receiving a CFR frame at the transmission destination, this indicates that normal fax communication operations can be performed, and thus transmits the image data to satisfy the minimum scanning time per line at the preset transmission speed of the modem (S8).

Thereafter, when the transmission of the image data is completed (S9), the communication path between the transmission destination and the destination is blocked (S10), and then ends.

On the other hand, if it is determined that the memory transmission / reception method is not in step 3 (S3) above, the original data is transmitted at a general minimum transmission time (S11), and the process proceeds to step 9 (S9) to all the steps after step 9 (S9). Perform the process.

Therefore, when the size of the image data is small, the image data can be transmitted / received normally without adding additional image data.

As a result, the facsimile memory transmission / reception method according to the present invention has the following advantages.

In other words, in the facsimile of the transmission / reception method using a memory, even when the size of the image data to be transmitted is small, the minimum transmission time is set to the minimum value so that only pure image data without additional image data is transmitted. Communication costs can be reduced.

Claims (2)

In a fax memory transmission / reception method for transmitting / receiving image data between a transmission destination and a reception destination using a memory: A CED sending step of transmitting a CED tone to the transfer destination to notify that the destination is connected to a communication path at its fax machine when a communication path is formed between the transfer destination and the destination; If the destination is a facsimile employing the reception method using the memory, the destination is requested to set the minimum scanning time per line to a minimum value, and the DIS frame for notifying the destination of the reception capability of the destination facsimile is received. A DIS sending step of sending from a destination to the transfer destination; If the transmission destination sets the transmission form to be actually transmitted at the same time, and the transmission destination employs a facsimile employing the transmission method using the memory, the transmission mode set by setting the minimum scanning time per line to a minimum value and the minimum per line A DCS sending step of sending a scanning time to the destination through a DCS frame; A TCF sending step of transmitting, to the destination, TCF data which transmits zero data for a predetermined time at a transmission rate preset for the line training at the transmission destination; A CFR sending step of transmitting a CFR frame, which is a response signal that the TCF data has been successfully received at the transmission rate, from the destination; And And transmitting the image data so as to satisfy the minimum scanning time per line at the transmission rate when the CFR frame is received at the transmission destination. The method of claim 1, The destination requests the transfer destination to set the minimum value of the minimum scanning time per line to '0' [milliseconds], and the transfer destination sets the minimum scanning time per line to '0' [milliseconds] at the request of the destination. Set to] to match the capabilities of the destination.

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