JPH0440157A - Transmission control method for facsimile equipment - Google Patents

Abstract

PURPOSE:To shorten time for a transmission procedure by setting code information corresponding to a transmission function, which is exchanged by a converting means, into the information field of a non-standard function setting signal or a non-standard function instructing signal when it is responded that a call terminating side is equipped with the converting means. CONSTITUTION:A system memory 2 stores a conversion table to convert a function information data, which is set to a facsimile control field FIF, to a function code data expressing the type, and by using the function code data as the function information data to be set in the facsimile information field FIF of a non-standard function identifying signal NSF, non-standard function setting signal NSF and non-standard function instructing signal NCS, the information amount of the function information data can be reduced. Then, the time for the transmission procedure is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission control method for a facsimile machine that can reduce the time required for transmission procedures.

[Prior Art] Normally, Group 3 facsimile devices negotiate the transmission function to be used in transmitting the image information before actually transmitting the image information. Furthermore, data transmission in the pre-transmission procedure uses a 300 bps V, 21 modem function to minimize the effects of data errors during data transmission.

In recent years, many attempts have been made to shorten the image information transmission time in Group 3 facsimile devices, but these methods can be broadly divided into two methods: shortening the image information transmission time, or shortening the time required for the transmission procedure. There are two types of things to do.

In order to shorten the transmission time of image information, it is possible to reduce the amount of information to be transmitted or increase the transmission speed, but the former method requires the provision of a new encoding/decoding unit, and In the latter method, for example, 12.0kb
It is necessary to provide a high-speed digital modem such as ps or 14.4 kbps, which increases the cost of the device.

On the other hand, a method to reduce the time required for the transmission procedure is to memorize the transmission function of the other party's terminal with which you have communicated so far, and then suddenly declare to the other party's terminal that you will use that transmission function when making a call. In this case, there is no need to add any device elements, so the increase in device cost can be minimized.

[Problem to be solved by the invention] However, in the method for shortening the transmission procedure time described above,
If the capabilities of the called party change, the transmission capability originally declared by the calling party cannot be used, so it is necessary to negotiate a transmission capability using the modified transmission capability of the called party. In that case, there may be an inconvenience that the transmission procedure time becomes longer.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a transmission control method for a facsimile machine that can shorten the transmission procedure time.

[Means for Solving the Problems] The present invention is provided with a conversion means for converting a transmission function into predetermined code information, and the called side is provided with the conversion means in a procedure signal sent when responding to an incoming call. When the calling side responds that the called side is equipped with a conversion means, the calling side will include information corresponding to the transmission function converted by the conversion means in the information field of the non-standard function setting signal or non-standard function command signal. On the other hand, the called side converts the code information set in the information field of the non-standard function setting signal or non-standard function command signal received from the calling side into the original transmission function using a conversion means. It was designed to do so. Further, when the receiving side receives a non-standard function setting signal in which code information is set in the first phase B, the receiving side converts it into the information field of the non-standard function identification signal to be sent in the next phase B. The code information corresponding to the transmitted transmission function is set.

[Operation] Therefore, the lengths of the information fields of the non-standard function setting signal, the non-standard function command signal, and the non-standard function identification signal can be significantly shortened, so that the time required for the transmission procedure can be shortened.

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

FIG. 1 shows a Group 3 facsimile machine according to one embodiment of the present invention.

In the figure, a control unit 1 performs control processing of each part of the facsimile machine and facsimile transmission control procedure processing, and a system memory 2 stores control processing programs and processing programs executed by the control unit 1. The parameter memory 3 is used to store various types of data required when executing the fax machine, and constitutes the work area of the control unit 1. The parameter memory 3 is used to store various types of information specific to this group 3 facsimile machine. It is.

The scanner 4 is for reading original images at a predetermined resolution, the plotter 5 is for recording and outputting images at a predetermined resolution, and the operation display section 6 is for operating this facsimile device. It consists of various operation keys and various displays.

The encoding/decoding unit 7 encodes and compresses the image signal, and also decodes the encoded and compressed image information into the original image signal. This is for storing a large amount of image information in a different state.

The group 3 facsimile modem 9 is for realizing the group 3 facsimile modem function, and has a low-speed modem function (V, 2) for exchanging transmission procedure signals.
1 modem), and high-speed modem function (V, 29 modem, V, 27ter) mainly for exchanging image information.
modem).

The network control device 10 is for connecting this facsimile device to the public telephone line network, and has an automatic call originating and receiving function.

These control unit 1, system memory 2, parameter memory 3, scanner 4, plotter 5, operation display unit 6, encoding/decoding unit 7, image storage device 8. Group 3 facsimile modem 9 and network control device flito are connected to system path 11, and data exchange between these elements is mainly performed via system bus 11.

Further, data is exchanged directly between the network control device 10 and the group 3 facsimile modem 9.

Here, in the transmission procedure, the signal format of the transmission procedure signal exchanged by the group 3 facsimile devices will be explained.

This transmission procedure signal includes: - For boat fishing, as shown in FIG. 2(a), a (head) flag sequence F consisting of a predetermined bit pattern, an address field A consisting of a predetermined bit pattern (global address), a control field C consisting of a bit pattern specific to the facsimile machine;
A facsimile control field FCF in which a facsimile transmission procedure signal is placed, a facsimile information field PIF in which various information added to the facsimile transmission procedure signal is placed, a frame check sequence FCS for error detection, and (rear) It is formed by arranging flags F in sequence.

For example, in the digital identification signal DIS used by the receiving device to notify the transmitting device of the standard transmission function installed in its own terminal, code data indicating the digital identification signal DIS is set in the facsimile control field FCF. , function information data indicating a standard transmission function is set in the facsimile information field PIF.

Furthermore, for transmission procedure signals that do not require the facsimile information field PIF, such as the procedure end signal EOP that is sent from the transmitting device to the receiving device as a post-message signal when all pages of image information have been transmitted, The facsimile information field PIF is omitted.

Here, the function information data set in the facsimile information field PIF is data in units of bytes (octets) in which the type of device function is assigned to each bit. Therefore, a non-standard function identification signal NSF, a non-standard function setting signal NSF, and a non-standard function command signal NC for notifying a non-standard device function are provided.
As for the function information data set in the facsimile information field PIF of No. 5, the more device functions are equipped, the larger the data amount becomes, and the longer the transmission time becomes.

On the other hand, the function information data includes expansion bits for expanding the data amount of the function information data for each fixed number of bytes, and device functions included in other device functions also contain bits independently. It has been assigned.

Therefore, in this embodiment, as shown in FIG. 2(b), a conversion table for converting the type of function information data set in the facsimile control field PIF into hail function code data is stored in the system memory 2. In addition, the non-standard function identification signal NSF, the non-standard function setting signal NS
By using the function code data as the function information data set in the facsimile information field PIF of F and the non-standard function command signal NC5, the amount of information of the function information data can be reduced and the time required for the transmission procedure can be shortened. I have to. Furthermore, an identification code indicating that one function code is set is added immediately before the function code, as shown in FIG. 2(c).

However, regarding the non-standard function identification signal NSF that is first sent from the receiving apparatus to the transmitting apparatus, since the function of the transmitting apparatus cannot be determined, normal function information data is set in the facsimile information field PIF.

FIGS. 3(a) and 3(b) show an example of processing at the time of transmission.

First, a call is made to a specified destination (process 101), and a digital identification signal DIS and a non-standard function identification signal NSF are received in response from the destination (process 102).

At this time, it is checked whether the call is in polling request mode (determination 103), and the result of determination 103 is NO.
When this happens, the transmission function to be used at that time is set based on the received digital identification signal DIS and non-standard function identification signal NSF (processing 104).

Here, it is checked whether the non-standard function identification signal NSF is set to indicate that function code data can be used as the contents of the facsimile information field PIF (determination 105), and if the result of determination 105 is YES, then , extracts the function code data representing the set device function from the above-mentioned conversion table, forms a non-standard function setting signal NSS in which the function code data is set in the facsimile information field PIF, and outputs the non-standard function setting signal NSS. is sent to the receiving device (process 106
).

Next, after executing a modem training procedure at the modem speed set at that time (process 107), image information for one page is transmitted (process 108).

When the transmission of image information for one page is completed, it is checked whether there is a next page (decision 109).If the result of judgment 109 is YES, it is checked whether the mode of the image information of the next page is the same. (Judgment 110), Judgment 11
When the result of 0 becomes YES, the multi-page signal M
The PS is sent (process 111), a response signal from the receiving side is received (process 112), and the process returns to process 108 to transmit the image information of the next page.

Further, when the result of the judgment 110 is NO, a message end signal EOM is sent (process 113), a response signal from the receiving side is received (process 114), and the process returns to phase B. This time, the facsimile information field PIF Non-standard function identification signal NS with function code data set to
F is received (process 115), the content of the function code data set in the facsimile information field PIF is analyzed (process 116), and the process returns to process 104 to set the transmission function to be used on the next page.

When image information transmission for all pages is completed and the result of judgment 109 is No, a procedure end signal EOP is sent (process 117), a response signal from the receiving side is received (process 118), and a disconnection command is issued. Send the signal DCN (processing 11
9), the line is restored (process 120).

On the other hand, the receiving side cannot use the function code data as the contents of the facsimile information field PIF, and judgment 1
When the result of step 05 is No, a non-standard function setting signal NSS with function information data set in the facsimile information field PIF is sent (process 121), and after executing the modem training procedure at the modem speed set at that time (process 122), and transmits image information for one page (processing 123).

When the transmission of image information for one page is completed, it is checked whether there is a next page (judgment 124), and if the result of judgment 124 is YES, it is determined whether the mode of the image information of the next page is the same. (Judgment 125), Judgment 125
When the result is YES, the multi-page signal MP
S (process 126), a response signal from the receiving side is received (process 127), and the process returns to process 123 to transmit the image information of the next page.

Further, when the result of the judgment 125 is NO, a message end signal ROM is sent (process 128), a response signal from the receiving side is received (process 129), and the process moves to process 102 to return to phase B.

Also, after finishing the image information transmission for all pages,
When the result of step 4 is NO, the process moves to step 117, executes the procedure for ending the transmission, and ends the one-stroke information transmission operation.

On the other hand, if the call at that time is a call in polling request mode and the result of judgment 103 is YES, check whether the receiving side can use function code data as the contents of the facsimile information field PIF ( Judgment 130), when the result of judgment 130 is YES, a process 131) to send a non-standard function command signal NSC with function code data corresponding to the device function of the own terminal set in the facsimile information field PIF; When the result is NO, a non-standard function command signal NSC with function information data corresponding to the device function of the own terminal set in the facsimile information field PIF is sent out (process 132), and the process moves to reception processing.

FIGS. 4(a) and 4(b) show an example of processing at the time of reception.

When an incoming call is detected, a called station identification signal CHD is sent (process 201), and then a digital identification signal DIS is sent.

A non-standard function identification signal NSF in which function information data corresponding to the device function of the own terminal is set in the facsimile information field FIF is transmitted (process 202).

Next, a signal from the calling side is received as a command, and it is checked whether the signal is a digital command signal DC5 or a non-standard command signal NSC for requesting polling transmission (determination 203), and the result of determination 203 is YES. When it becomes
Shift to sending processing.

When the non-standard function setting signal NSS is received as a command signal and the result of judgment 203 is NO, it is checked whether function code data is set in the facsimile information field PIF of the non-standard function setting signal NSS ( Judgment 204), when the result of judgment 204 is YES, the conversion table is used to convert the function code data into the corresponding function information data (process 205), and the device function corresponding to the function information data is set ( Step 206), and execute a modem training procedure at the modem speed set at that time (Step 207).

Next, image information for one page is received (process 208).
, the command signal after the message is received and processed 2o9), and it is checked whether it is a multi-page signal MPS (determination 210).

When the result of judgment 210 is YES, after sending a response signal to acknowledge the reception result at that time (processing 21
1) Return to step 208 to receive image information for the next page.

When the result of judgment 210 is No, it is checked whether the received command signal is the message end signal EOM (judgment 212), and when the result of judgment 212 is YES, a response signal is sent to acknowledge the reception result. Later (process 213), a non-standard function identification signal NSF with function code data set in the facsimile information field FIF is sent (process 214), and the process returns to judgment 203 to receive the image information of the next page.

Further, when the result of the judgment 212 is No, the received command signal is the procedure end signal EOP, so after sending a response signal to acknowledge the reception result (process 215), the disconnection command signal DCN is received (process 216). Restore (
Processing 217).

On the other hand, the function information data is set in the facsimile information field PIF of the received setting signal, and judgment 20
When the result of step 4 is NO, the device function corresponding to the function information data is set (process 218), and the modem training procedure is executed at the modem speed set at that time (process 219).

Next, image information for one page is received (processing 220).
, process the command signal after the message properly (221), and check whether it is a multi-page signal MPS (
Judgment 222).

When the result of judgment 222 is YES, after sending a response signal to acknowledge the reception result at that time (processing 22
3) Return to step 220 to receive image information for the next page.

When the result of judgment 222 is NO, it is checked whether the received command signal is the message end signal ROM (judgment 224), and when the result of judgment 224 is YES, a response signal is sent to acknowledge the reception result. Later (process 225), the process returns to process 202 and judgment 203 to receive image information for the next page.

Further, when the result of judgment 224 is No, the received command signal is the procedure end signal EOP, so the process moves to process 215 and ends the image information receiving operation.

In this way, in this embodiment, the non-standard function identification signal N
By setting function code data in the information field PIF of SF, non-standard function setting signal NSS, and non-standard function command signal NSC, the amount of information is reduced, so the transmission time of these signals is shortened. can,
As a result, the time required for the transmission procedure can be significantly reduced.

[Effects of the Invention] As explained above, according to the present invention, the length of the information field of the non-standard function setting signal, the non-standard function command signal, and the non-standard function identification signal can be significantly shortened. The effect is that the time required for the procedure can be shortened.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a Group 3 facsimile device according to an embodiment of the present invention, FIG. 2(a) is a schematic diagram showing the signal format of a transmission procedure signal, and FIG. 2(b) is an example of a conversion table. FIG. 3(c) is a schematic diagram showing an example of a facsimile information field using function code data. FIGS. 3(a) and (b) are a flowchart showing an example of processing at the time of transmission. Figures a) and (b) are flowcharts illustrating an example of processing at the time of reception. 1... Control unit, 2... System memory, 3... Parameter memory.

Claims (2)

[Claims] (1) The called side is equipped with a conversion means for converting the transmission function into predetermined code information, and the called side includes information indicating that it is equipped with the conversion means in the procedure signal sent when responding to an incoming call, and the calling side: When the called side responds that it is equipped with the conversion means, code information corresponding to the transmission function converted by the conversion means is set in the information field of the non-standard function setting signal or the non-standard function command signal; A facsimile machine characterized in that the called side converts the code information set in the information field of the non-standard function setting signal or the non-standard function command signal received from the calling side into the original transmission function using the conversion means. Device transmission control method. (2) When the receiving side receives a non-standard function setting signal in which code information is set in the first phase B,
2. The transmission control method for a facsimile apparatus according to claim 1, further comprising setting code information corresponding to the transmission function converted by said conversion means in an information field of a non-standard function identification signal transmitted in the next phase B.