KR19990075695A - How to shorten fax transmission / reception time - Google Patents

Abstract

Scan the original from the sending fax machine, encode the data line, which is the line with the data in the document, and check the number of white lines included in the scanning data and store it in the memory of the sending fax machine. When data is detected, the number protocol command of the white line is transmitted to the receiving fax. When receiving the number protocol command of the white line from the receiving fax, the reception of the data is paused and the number of white lines corresponding to the number of white lines received from the sending fax is paused. When the setting of the received data and the setting of the white line are completed, the white line count reception completed protocol command is transmitted to the transmission fax.

Therefore, by reducing the amount of data transmitted / received by transmitting / receiving the number of white lines of scanning data, it is possible to drastically reduce data transmission / reception time in a facsimile.

Description

How to shorten fax transmission / reception time

The present invention relates to a method for shortening the transmission / reception time of a facsimile system connected to each other in order to exchange data in a transmission / reception facsimile. More specifically, when transmitting / receiving scanning data, the data of the scanning data does not exist. The present invention relates to a method for shortening a transmission / reception time of a facsimile that can reduce the amount of data to be transmitted / received by transmitting / receiving a number of white lines, which are lines.

In general, the facsimile system includes a scanner unit which reads an image of an original and converts the image into digital data, a printer unit which can output the converted data in text form, and transmits and receives data to and from a remote party. Refers to a device integrated with a communication means such as a telephone line to exchange documents with each other.

In the facsimile system, most of the originals used by the user use about 4 to 8% of the originals based on the front of the A4, and most of the originals consist of white lines without image data. .

In addition, terminal devices that transmit and receive a predetermined message using a data transmission network, such as a facsimile, typically exchange various control information with each other. As such, a protocol defining a procedure of exchanging control information between terminal devices is called a protocol. Examples include call selection, call release procedures, and message flow control.

Figure 1 shows a protocol implementation procedure of a typical facsimile.

In general, the facsimile must meet the protocol requirements recommended in Regulation T.30 of CCITT, the International Telegraph Advisory Board.

However, in the conventional facsimile system, when the original is read and encoded, the image data is encoded by coding the image data regardless of the white line, that is, the white line. Because of the large amount of data transmission, it took a lot of time to send / receive.

Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to detect the number of white lines without encoding a white line, which is a line where no original data exists when transmitting data from a transmission fax to a reception fax. The present invention provides a method for shortening a transmission / reception time of a fax that can reduce the time required for transmission / reception in a facsimile system.

1 is a diagram showing a protocol execution procedure of a general facsimile,

2 is a block diagram schematically showing a configuration of a facsimile to which the present invention may be applied.

3A and 3B are flowcharts for executing the facsimile transmission / reception time reduction method of the present invention;

4 is a flowchart illustrating a protocol applying the facsimile transmission / reception time reduction method of the present invention.

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

100: central processing unit 101: memory unit

102: scanner unit 103: operation panel

104: modem 105: communication control unit

106: printer unit 10: data

20: Count protocol command of white line

30: Number of white lines received protocol command

A feature of the present invention for achieving the above object is to scan an original in a transmission fax, to encode a data line that is a line in which there is data in the original, and to check the number of white lines that are lines in which there is no data in the original. If the number of white lines is detected during transmission from the sending fax to the receiving fax, the data stored in the memory section of the sending fax is set as the number of white lines in the sending data. The number of white lines to send the protocol command to the receiving facsimile, and to set the number of white lines present in the transmission data transmitted from the sending facsimile to the received data during the reception of the data from the receiving facsimile. Count protocol command When receiving, the data is paused and the white line corresponding to the number of white lines received from the sending fax is set to the data being received, and the white line corresponding to the number of white lines received by the receiving fax is set to the data. The number of white lines informing the transmission fax is that the received protocol command is transmitted to the transmission fax.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram schematically illustrating a configuration of a facsimile to which the present invention may be applied.

3A and 3B are flowcharts for implementing a method of shortening a transmission / reception time of a facsimile of the present invention.

4 is a flowchart illustrating a protocol in which the facsimile system transmits / receives a time shortening method of the present invention.

Referring to FIG. 2, the central processing unit 100 controls the overall performance of copying, transmitting, and receiving an original according to a predetermined program, and in particular, detects a white line of image data when encoding the scanned data, thereby counting the number of white lines. And the encoded image data are stored in the memory unit 101, and the predetermined white line number related protocol is called and transmitted to the memory unit.

The memory unit 101 stores an operation program, a protocol related to the number of white lines, and a general control program, and accesses or stores the image data of the original, the number of white lines, and the received data by the control of the CPU 100. do.

The scanner unit 102 scans an image of an original, converts it into digital data, which is binary information, and provides the same to the central processing unit 100.

The operating panel 103 has a plurality of keys capable of generating key data for setting an operation mode of the system. When the key data is generated, the operation panel 103 is input to the central processing unit 100 and the central processing unit 100 Has an internal display device capable of displaying display data.

The modem 104 is controlled by the central processing unit 100 and performs analog modulation on the output data of the central processing unit 100 and demodulates and outputs the analog receiving input.

The communication control unit 105 is operated under the control of the central processing unit 100 to form a call loop of the telephone line (Tip, Ring), and the modulation and demodulation signal of the modem 104 and the signal of the telephone line (Tip, Ring). Interface.

The facsimile configured as described above is described by applying a method of shortening the transmission / reception time of the facsimile.

The following description will be made under the assumption that the data transmission / reception facsimile is connected to enable mutual data exchange in a non-standard mode.

First, referring to Figure 3a will be described the operation of the transmission facsimile to which the present invention is applied in the facsimile system connected to enable the mutual data exchange in the transmission / reception fax.

If the user enters the fax number of the receiving side using the operation panel 103 of the transmission fax and the communication path is connected by performing a protocol for connecting the communication path of the transmission / reception end (S1), the scanner unit of the transmission fax In 102, the transmission original is scanned under the control of the central processing unit 100 (S2).

Thereafter, the central processing unit 100 of the transmission fax encodes the scanning data in the scanner unit 102 and checks the number of white lines of the scanning data (S3).

When the white line is detected in the scanning data, the CPU 100 of the transmission fax counts the number of the white lines and stores the encoded scanning data and the number data of the white lines in the memory unit 101 (S4). The modem 104 is controlled to convert the stored data into an analog signal and transmit the received data to the receiving fax (S5).

However, if the number processing data of the white line is detected while transmitting the transmission data stored in the memory unit 101 to the receiving facsimile (S6), the central processing unit 100 of the transmission facsimile is the memory unit. In step 101, the protocol associated with the white line is called, and the number fax command W_NO of the white line to set some white lines in the data being received by the reception fax is transmitted to the reception fax (S7).

Next, referring to FIG. 3B, the operation of the receiving fax machine to which the present invention is applied in the connected fax system for mutual data exchange in the transmitting / receiving fax machine is as follows.

When the communication path is connected by performing a protocol for connecting the communication path of the transmitting / receiving end (S10), the central processing unit 100 of the receiving fax machine starts receiving data from the sending fax machine (S20) and the number protocol of the white line. When the command W_NO is received from the transmission facsimile (S30), the reception state is suspended (S40), and as many white lines as the number of white lines are set in the received data (S50).

Subsequently, the central processing unit 100 of the receiving fax calls the number of received white protocol protocols (W_ACK) indicating that the number of white lines is set for the data being received by the memory unit 101 to transmit the fax. (S60).

In addition, in FIG. 3A, the central processing unit 100 of the transmission fax receives the received number of received protocol commands W_ACK from the reception fax (S8), and if all data transmission is not completed (S9), the stored data is stored. If the number data of the white line is detected while transmitting the stored data (S5) (S6), the number protocol command (W_NO) of the white line is transmitted again to the receiving fax (S7).

Here, in FIG. 3B, since the central processing unit 100 of the reception fax has not received all data from the transmission fax (S70), data reception is started again (S20), and the white line count protocol command (W_NO) is received from the transmission fax. If it is not received, the data is received (S80). If all data is not received from the transmission fax (S90), data reception is started again (S20).

In addition, when receiving the number protocol command W_NO of the white line from the transmission facsimile (S30), the central processing unit 100 of the receiving facsimile stops the reception state (S40) and sets the white line in the received data (S50).

Subsequently, the central processing unit 100 of the reception fax transmits the number of received white protocol commands (W_ACK) to the transmission fax (S60) to inform the transmission fax that the white line has been received.

When the transmission of data is completed in the transmission fax of FIG. 3A (S9) and the reception of data in the reception fax of FIG. 3B is completed (S70), all data transmissions are performed by performing a protocol for cutting the communication path between the transmission / reception faxes. / The receiving process is terminated.

Referring to FIG. 4, a protocol execution procedure applying a transmission / reception time reduction method of a facsimile performing such a process is described as follows.

As shown in FIG. 4, when a Calling Tone (CNG) command is transmitted from a sending fax machine, and a Called Station Identification (CED) command is returned from the receiving fax machine to the sending fax machine in response thereto, the calling fax machine receives a Calling Tone (CNG) command between the sending fax machine and the receiving fax machine. Protocol commands corresponding to pre-messages begin to be exchanged.

Therefore, after the CED signal is returned from the receiving fax to the transmitting fax, and a non-standard function identification (NSF) command, an optional signal, a receiving terminal identification (CSI) command, a receiving capability (DIS) command, etc., which are optional signals are continuously transmitted, The transmission fax transmits a transmission terminal identification signal (TSI) command and a digital command signal (DCS) command, which are standard signals, and a training check signal (TCF) command.

Here, the receiving facsimile identification (CSI) command and the transmitting facsimile identification signal (TSI) command refer to a telephone number related command having the telephone number of the receiving fax and the telephone number information of the transmitting fax, respectively. In addition, the option signal is a signal used to add a special function according to the facsimile product.

Then, the reception fax transmits a confirmation to receive (CFR) command to the transmission fax indicating that it has received a transmission facsimile identification signal (TSI) command and a training check signal (TCF) command among these signals.

Subsequently, when data 10 is transmitted from the transmission fax, and the count data of the white line of the transmission original is detected, the central processing unit 100 of the transmission fax transmits the number protocol command W_NO (of white lines preset in the memory unit 101). 20) and send it to the receiving fax machine.

Accordingly, upon receiving the W_NO 20, the central processing unit 100 of the reception fax sets the number of white lines in the received data and receives the number of white lines received in advance in the memory unit 101. Call 30) to send by sending fax.

In addition, the transmission fax receives the number of white line reception completion commands W_ACK 30 and transmits the remaining data 10 to the reception fax, and repeats the above protocol command when the white line is detected again.

Then, when the sender's sending job is finished, the sending fax machine sends an End Of Message (EOM) command to the receiving fax machine, and the receiving fax machine sends a Message Confirmation (MCF) command. do.

Thereafter, when the receiving fax receives the DCN (Disconnect) command from the sending fax, it is determined that the communication is terminated, and the connection is terminated. In the receiving fax, the receiving fax is stored in the memory unit 101 using the printer unit 106 and the white line is terminated. Print the set received data.

Therefore, the transmission fax can detect the number of white lines of transmission data and transmit the number of white lines to the reception fax to reduce the amount of transmission / reception data, thereby greatly reducing the transmission / reception time of the data.

As described above, according to the facsimile transmission / reception time reduction method according to the present invention, by detecting and transmitting the number of white lines of transmission data, the amount of data is reduced to reduce the transmission / reception time requirements. In addition, the user has the effect of reducing the burden of the telephone bill.

Claims (1)

In a facsimile system connected to allow data exchange between transmit and receive faxes in non-standard mode: The transmission fax machine scans an original, encodes a data line that is a line in which data exists, and checks a white line that is a line in which no data exists in the original. A storage step; When the data stored in the memory of the transmission facsimile is transmitted from the transmission facsimile to the reception facsimile in the storing step of the transmission facsimile, the number of white lines present in the transmission data is set to the received data when the number of white lines is detected. A transmission facsimile transmitting a number protocol command of a white line to the reception facsimile; When the reception fax receives the number protocol command of the white lines to receive as much data as the number of white lines present in the transmission data from the transmission fax transmission step during the reception of the data from the transmission fax, A receiving facsimile setting step of suspending reception and setting the white lines corresponding to the number of white lines received from the transmission facsimile to the data being received; When the setting step of the receiving fax is completed, the number of white lines received completion protocol command informing the transmitting fax that the number of the white lines as the number of the white lines received by the receiving fax is set to the transmission fax. Transmitting / receiving time reduction method comprising the step of transmitting the receiving fax to transmit.