KR19980039837A - How to Send Multiple Pages from the Fax - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to a method for transmitting a multipage document of at least two pages in a fax.

I. The technical problem to be solved by the invention

Provided is a transmission method that can reduce communication time by preventing waste of time due to unnecessary procedures when a change of control information is required between pages while transmitting a multipage document.

All. Summary of Solution of the Invention

When performing the pre-message procedure to check and set up the capability of the receiving side facsimile, after storing the capability information of the receiving side facsimile, it is not possible to check and support the capability information when a change of control information is required between pages during the original transmission. In this case, skip the re-execution of the premessage procedure and continue to send the original on the next page.

la. Important uses of the invention

It is used to shorten the communication time when sending multiple-page originals in the fax.

Description

How to Send Multiple Pages from the Fax

The present invention relates to a facsimile, and more particularly to a method for transmitting a multipage original of at least two pages.

Normally, communication for manuscript transmission between facsimile is performed by performing a protocol according to a transmission control procedure promised in advance. For the facsimile, the transmission control procedure follows the transmission control procedure recommended in the International Telegraph and Telephone Consultative Committee (CCITT) Recommendation, which consists of the phases A through E. Phase A is the step of setting up a call. Phase B is a pre-message procedure that confirms and sets up the opponent's capabilities. The capability includes control information such as transmission speed, resolution, coding scheme, paper size, and the like. Phase C is a step of transmitting image data which is an actual facsimile message. Phase D is a post-message procedure in which signaling such as message termination, confirmation, multiple pages, and procedure termination is performed. Phase E is the phase of releasing a call. First, when a line is formed between the transmitting and receiving facsimile in phase A, phase C is performed to transmit actual image data according to the original through phase B for transmitting and receiving mutual capability information of the transmitting and receiving facsimile. At this time, whenever the image data transmission for the original of each page is completed, the presence or absence of the next page is checked in phase D. If there is a next page, perform phase C again. If there is no next page, proceed to phase E to terminate the line and end.

According to such a transmission control procedure, there may be a case in which control information such as resolution or paper size needs to be changed between pages during transmission of an original of multiple pages. This change of control information is usually made when the status of the original to be transmitted varies between pages. This will be described with reference to FIG. 1, which shows a typical facsimile transmission control procedure in more detail. First, the transmitting and receiving side fax sets up a call by transmitting and receiving Calling Tone (CNG) and Called Station Identification (CED) in phase A. Then, in phase B, the transmitting and receiving side facsimile sequentially transmits and receives digital identification signal (DIS), digital command signal (DCS), training check (TCF), and confirmation to receive (CFR) to check and set up mutual capabilities. . The DIS indicates the capability of the receiving side facsimile and includes control information such as a transmission speed, a resolution, an encoding method, a paper size, and the like of the receiving side facsimile. DCS represents the capability of the sending side facsimile set up for DIS from the receiving side facsimile. The TCF represents data to be experimentally transmitted before transmitting image data according to the capability set up between the sending and receiving side facsimile, and transmits zero data for 1.5 seconds at the same speed as the image data sending rate. The CFR is a command indicating that the actual message, i.e., image data, may be transmitted because the receiving side facsimile received the premessage including the TCF correctly. After these steps, the sending / receiving facsimile sends and receives the actual image data in phases C and D. The sending facsimile machine completes the transmission of the image data for each page and, if there is a next page, multi-page signal and in response the receiving facsimile sends a message confirmation (MCF).

In this way, if a change of resolution or paper size is required between pages during the transmission of an original of a multi-page original, the sending side facsimile returns from phases C and D to phase B and checks the capability of the receiving side facsimile again. That is, when the sending side facsimile transmits an end of message (EOM) and the receiving side facsimile transmits a message confirmation (MCF), the sending and receiving side facsimile performs the phase B again. The EOM is a command to be transmitted when the next page is to be transmitted because the control information of the resolution or paper size is changed in the sending side facsimile during the message transmission. In this case, when the receiving side facsimile can support the capability required by the transmitting side facsimile, phase C and D are performed after changing necessary parameter values in the control information. On the other hand, if the receiving side facsimile cannot support the capability required by the sending side facsimile, phases C and D are performed without changing the control information and the original is transmitted with the capability of the previous page.

After all pages of the document have been transmitted, the end of procedure (EOP) and MCF are transmitted and received between the sending and receiving side facsimile, and the sending side facsimile sends a DCN (Disconnect) and terminates the call at phase E.

As described above, if a change of control information is required between pages during the transmission of a multi-page document, the procedure is again performed from phase B so that the sending side fax reconfirms the capability of the receiving side fax. This requires more time, typically 7.5 seconds, to re-run Phase B. For example, if you want to change the image to superfine while transmitting image data with the fine resolution in phases C and D, the fax on the sending and receiving side is different from the resolution of the page just sent. Will start again. In this case, the sender's facsimile may be a super fine, whereas the receiver's facsimile may not be changed to a super fine, if only a fine is supported. Accordingly, after performing phase B again, transmission of the next page in phases C and D can be made in the same manner as in the previous page without changing control information. In this case, phase B is a result of performing unnecessary procedures, that is, about 7.5 seconds of time required to perform phase B.

As described above, when a control information is required to be changed between pages during the transmission of a multi-page document, even if the receiving side facsimile capability is not supported, it is always performed again from phase B. There was a wasteful issue.

Accordingly, an object of the present invention is to provide a transmission method that can reduce communication time by preventing waste of time due to unnecessary procedures when a change of control information is required between pages during transmission of a multipage document.

1 is a conventional facsimile transmission control procedure diagram,

2 is a block diagram of a conventional facsimile to which the present invention is applied;

3 is a process flow diagram of a transmitting side fax according to an embodiment of the present invention;

4 is a facsimile transmission control procedure according to an embodiment of the present invention.

In order to achieve the above object, the present invention stores the capability information of the receiving side facsimile when performing the pre-message procedure for confirming and setting up the capability of the receiving side facsimile, and then changes the control information between pages during the original transmission. When the capability information cannot be confirmed and supported, the retransmission of the premessage procedure is skipped and the manuscript transmission on the next page is continued. The capability information of the receiving side facsimile becomes DIS information received from the receiving side facsimile.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the annexed drawings, numerous specific details are set forth in order to provide a more thorough understanding of the present invention, such as specific processing flows, protocols, and the like. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

First, a block diagram of a conventional facsimile to which the present invention is applied is shown as FIG. The central processing unit 200 controls the operation of the facsimile according to the program stored in the memory unit 202. The memory unit 202 stores an operation program, a protocol control program, and various reference data of the central processing unit 200, and temporarily stores data according to program execution of the central processing unit 200. OPE (Operating Pannel Equipment) 204 has a plurality of numeric keys, function keys and a display device, and applies key data according to key input to the central processing unit 200 and is controlled by the central processing unit 200. Displays various statuses of. The scanner 206 scans an original and outputs image data corresponding to the original image to the central processing unit 200. The image data output from the scanner 206 is processed by the central processing unit 200 and stored in the memory unit 202 and transmitted by a modem (modulator-demodulator) 208 or by the printing unit 212. Printed. The modem 208 modulates the output data and the image data of the central processing unit 200 into analog signals, transmits them through a transmission path through the network control unit (NCU) 210, and demodulates the received analog signals. The NCU 210 forms a line between the transmission path and the modem 208 under the control of the central processing unit 200. The printing unit 212 prints an image under the control of the central processing unit 200.

In the above-described facsimile, when a change of control information is required between pages while a multi-page document is being transmitted, as described above, regardless of the capability of the receiving side facsimile, it has always been repeated from phase B. That is, when a change of control information that does not support the capability of the receiving side facsimile is required, the time has been wasted because phase B is always performed again although the control information cannot be changed even if phase B is performed again. Therefore, in this case, the communication time can be shortened by omitting the procedure for performing phase B.

With this in mind, the present invention shortens the communication time by omitting the procedure of phase B when a change of control information that does not support the capability of the receiving side facsimile is required while transmitting a multi-page document. 3 is a flowchart according to an embodiment of the present invention for this purpose. The operation according to the flowchart of FIG. 3 is programmed in the memory unit 202 to be performed by the CPU 200 of FIG. 2.

An embodiment of the present invention will now be described in detail with reference to FIGS. 2 and 3. In the following description, it is assumed that the facsimile of FIG. 2 is a sending side facsimile. In order to transmit the original, the central processing unit 200 of FIG. 2 sets up the receiving side facsimile and the call through the modem 208 and the NCU 210 according to phase A as in the normal case in step 300 of FIG. do. Next, the central processing unit 200 performs a premessage procedure for checking and setting up the capability of phase B, that is, the receiving side facsimile, as described above in step 302. At this time, the central processing unit 200 stores the capability information of the receiving side facsimile, that is, the DIS information, identified in accordance with the pre-message procedure in the memory unit 202 in step 304. Thereafter, the central processing unit 200 performs phases C and D to transmit the original. That is, the central processing unit 200 scans the document by the scanner 206 in step 306 and transmits the image data to the receiving side facsimile via the modem 208 and the NCU 210. At this time, after transmitting the original of one page, the central processing unit 200 checks whether there is a next page to be transmitted in step 308. In this case, when there is a next page, the CPU 200 checks whether there is a change request of the control information in step 310. If there is no request to change the control information, the flow advances to step 306 to transmit image data of the next page to the receiving side facsimile.

If a change of the resolution or paper size control information is required while transmitting the multi-page document as described above, the CPU 200 performs step 312 in response to this in step 310. In operation 312, the CPU 200 checks capability information of the receiving side facsimile stored in the memory unit 202. In this case, if the receiving side facsimile cannot support the change request as a result of checking the capability information, proceeding to step 306, the document transmission of the next page is continued without changing the control information unlike in the prior art. On the other hand, if the receiving side facsimile can support the change request, the process is performed again from the premessage procedure in step 302 as in the prior art. If there is no next page after all the originals have been transmitted, the central processing unit 200 performs phase E in step 314 in response to this in step 308 to release and terminate the call.

Therefore, if a change of control information that does not support the capability of the receiving side facsimile is required while transmitting a multi-page document, communication time can be shortened by skipping unnecessary phase B procedures.

4 shows a facsimile transmission control procedure according to an embodiment of the present invention as described above. 4 shows an example in which the procedure of phase B is omitted when a change of control information that does not support the capability of the receiving side facsimile is required while transmitting a multi-page document. Therefore, even if the control information is required to change, if the capability of the receiving side facsimile is not supported, the communication time is shortened by omitting the procedure of phase B, as shown in FIG.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. In particular, although the embodiment of the present invention illustrates the case where the control information of the resolution or the paper size is changed, the same applies to the case where the control information such as the transmission speed is changed. Therefore, the scope of the invention should not be defined by the described embodiments, but should be defined by the equivalents of the claims and the claims.

As described above, the present invention is advantageous in that communication time can be shortened by preventing waste of time due to unnecessary procedures when a change of control information is required between pages while transmitting a multi-page document.

Claims (5)

In the method of sending a document of multiple pages in a fax, When performing the pre-message procedure for checking and setting up the capability of the receiving side facsimile, the capability information of the receiving side facsimile is stored, and the capability information is checked and supported when a change of control information is required between pages during the original transmission. If it is unable to do so, skips the re-execution of the premessage procedure and continues the transmission of the original on the next page. The transmission method according to claim 1, wherein the change of the control information is a change in resolution or paper size. In the method of sending a document of multiple pages in a fax, Setting up the receiving facsimile and call, Performing a premessage procedure for checking and setting up the capability of the receiving side facsimile; Transmitting a document after storing the capability information of the receiving side facsimile confirmed according to the pre-message procedure; Checking the capability information when a change of control information is required between pages while transmitting the original; Continuing the original transmission without changing the control information when the receiving side facsimile cannot support the change request; And if the receiving side facsimile supports the change request, performing the pre-message procedure again. The transmission method according to claim 3, wherein the change of the control information is a change in resolution or paper size. The transmission method according to claim 4, wherein the capability information is DIS information received from the receiving side fax.