JPH0630216A - Facsimile communication procedure - Google Patents

Abstract

PURPOSE:To simplify communication procedure by sending out a prescribed RTC after a picture signal is sent out in transmission, sending out the picture signal of the next page immediately, or detecting the RTC in reception, and starting the reception of the next page immediately. CONSTITUTION:A transmission side T, when completing pre-procedure by the CCITT recommendation T.30 procedure, sends out the RTC 2 after sending a message 1 on a first page, and starts the reading of the message 3 on the next page without interrupting read control and encode processing when an original exists. Hereinafter, when the page continues further, similar processing is repeated. When the final original arrives, a procedure completion signal EOP5 is transmitted after the RTC4 is sent out, and the CCITT recommendation T.30 procedure is executed. A reception side R, after recceiving the RTC, performs the reception monitoring of a procedure signal. When a message signal is received, recording control and decode processing are continued, and the message of the next page is received. When the procedure signal is received, the CCITT recommendation T.30 procedure is executed hereinafter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile communication procedure favorably used in a facsimile machine having a memory function.

[0002]

2. Description of the Related Art A communication procedure in a facsimile machine is
CCITT Recommendation T. 30. FIG. 3 shows a conventional communication procedure.

FIG. 3 shows a communication procedure for transmitting / receiving encoded data (hereinafter referred to as a message) by standard procedure processing. The transmitting side T sends the message 30 to the receiving side R after the completion of the pre-procedure, and after the completion of the message, the control return code RT
C (Return to control) 31 is sent, and then MPS (Multi-page Signal) 32 which is a signal for plural sheets is sent. On the receiving side R, after the message is printed and recorded, when the message is completely received, the message confirmation signal MCF (M
essege confirmation) 33 is returned. When the MCF 33 is returned, the sending side T sends the message 34 and the RTC 35 on the next page, and the receiving side R prints and records. Although FIG. 3 shows the case of two-sheet transmission, if there are more transmission originals, MPS is sent and the above operation is repeated. If there is no manuscript, the message is sent and the sender T sends the procedure end signal
OP (End of procedure) 36 is transmitted, and the receiver R receives M
By sending back CF37, the transmission side T sends a line disconnection command signal DCN (Disconnect) 38 to disconnect the line.

Facsimile procedure signals such as MPS and MCF are composed of HDLC (High-level Data Link Control) frames. An example of the HDLC frame is shown in FIG.
The HDLC frame is composed of a preamble 40 (one consecutive second of the flag sequence "01111110"), two flag sequences 41, an address field 42, a control field 43,
It is composed of a facsimile control field 44, an FCS (frame check sequence) 45 and a flag sequence 46. Since transmission is performed at 300 bps, the transmission time T1 of one frame is about 1.2 seconds, and as shown in FIG. 3, the time T from the end of the first page to the start of transmission of the next page.
The minimum min is 2.4 seconds.

[0005]

SUMMARY OF THE INVENTION In the above conventional example,
The procedure control between pages is at least 2.4 seconds or longer. Therefore, as an encoding method for message transmission, for example, CCITT Recommendation T.264. Even if the two-dimensional coding specified in 4 is used to increase the speed, the time spent for the procedure signal increases as the number of pages increases, so that there is a problem that the overall transmission time is not shortened so much. there were.

An object of the present invention is to provide a facsimile communication procedure capable of realizing high-speed transmission without increasing the transmission time due to a procedure signal when transmitting a plurality of pages.

[0007]

In order to achieve the above object, a facsimile apparatus according to the present invention is provided with a CC when transmitting.
ITT Recommendation T. 4, the means for transmitting the encoded data and the RTC, the means for transmitting the encoded data of the next page immediately after the RTC is transmitted, the means for the receiver to receive the encoded data, the means for detecting the RTC, and CCI
TT Recommendation T. 30 is provided with a means for receiving a control signal defined in 30, and a mode for immediately starting reception of the next page when encoded data is received after RTC detection,
And when the control signal is received after RTC detection, CCI
TT Recommendation T. The solution is to have a mode that initiates 30 procedures.

[0008]

In the above structure, the transmitter starts the reading of the next page without interrupting the reading control and the encoding process when the next original exists after sending the RTC after sending the image signal of the first page. To do. When more pages continue, the same processing is repeated. In the case of the final manuscript, a procedure end signal EOP is sent after RTC transmission, and thereafter, CCITT recommendation T.
Perform 30 steps. After receiving the RTC, the receiver monitors for message and procedure signal reception. When the message signal is received, the recording control and the decoding process are continued, and the message on the next page is received. If the procedure signal is received, then CC
ITT Recommendation T. Perform 30 steps. All of the above controls are controlled by software, and there is no increase in hardware.

[0009]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a time chart when two originals are continuously fed. FIG. 2 is an example of a microcomputer flow chart for realizing this embodiment. The transmitting side T is CCITT recommendation T.264. When the pre-procedure of 30 procedures is completed, the message 1 of the first page is transmitted (S1), and then the first RTC2 is transmitted (S).
2). The transmitting side T checks the presence of the next original (S3).
If there is a manuscript, the message 3 (S1) on the second page is sent without changing the mode, and after the second RTC 4 is sent (S
2) Then, the procedure shifts to the post-procedure and the procedure end signal EOP is transmitted (S4).

The receiving side R receives the message 1 on the first page (S5), checks the RTC detection (S6), and returns to RT.
If C2 is detected, perforations for page breaks are printed (S7). The receiving side R monitors the message carrier and the procedure signal carrier at the same time while receiving the message, and checks the presence or absence of the message carrier (S
8) If the message carrier is detected, the message reception is continued and the next page message 3 is received (S5). Next, the second RTC 4 is detected (S6), and RT
If C is detected, perforations are printed (S7). The presence / absence of a message carrier is checked (S8). If the message carrier disappears, the presence / absence of a procedure signal carrier is checked (S9). If the procedure signal carrier is received, the procedure signal is analyzed (S10), and a valid signal is detected. If not detected, disconnect the line. C if valid signal
CITT T.A. Move to 30 procedures. Procedure signal EOP5
When the message is detected, the message confirmation signal MCF6 is returned when the messages for two sheets are completely received. MCF
When 6 is returned, the transmitting side T transmits DCN7 and disconnects the line.

Next, as another embodiment of the present invention, an application example to a model having a memory will be shown. FIG. 6 shows a second embodiment. The receiving side R uses the remaining memory capacity of its own device as a non-standard device signal NSF (Non-standard facilities).
It is transmitted to the transmission side as internal information of. An example of the NSF signal is shown in FIG. The facsimile information 50 in the NSF includes a country code 51, a manufacturer code 52, a model code 53, an encoding system 54, a sub-scanning line density 55, a transmission speed 56, a receivable memory capacity 57, and the like.

The NSF 60 is transmitted together with a digital identification signal (DIS) 61 indicating a standard function. The transmitting side T knows the contents of the manufacturer code 52, the model code 53, the receivable memory capacity 57 of the receiving side R, etc. from the received NSF 60. First, when the maker code 52 and the model code 53 match the own device, the transmitting side T calculates the transmittable data amount from the received receivable memory capacity 57. For example, n% of the receivable memory capacity (n is 80, for example) is held as the threshold value of the receivable data (S60).

Next, the transmitting side T receives the non-standard device setting signal NSS.
62 is transmitted. After that, TCF (Training check) signal 6
3 is sent out. When the receiving side R receives the training signal correctly, the receiving side confirmation signal CFR (Confirmation to
receive) 64 is returned. The transmitting side T starts transmitting the message 65 when the CFR 64 is returned. The RTC 66 is transmitted after the message of one page is completed. At this time, mode transition determination (S61) is performed, and if the number of data of the transmitted message is less than the threshold value held in advance in S60, the message 67 of the next page is transmitted. After sending the message of the second page, the RTC 68 is sent and the mode shift determination (S62) is performed again. If it is above the threshold,
CCITT T. The operation shifts to the 30 communication procedure, and the multi-page signal MPS69 which is one of the procedure signals is transmitted. The receiving side R replies with the MCF 70 when the continuously transmitted message can be correctly received. When the MCF 70 is returned, the transmitting side T sends the message 71 of the third page. Subsequent processing shall follow CCITT procedure.

As described above, when the memory capacity of the receiving side R is known in advance, the data within the allowable memory capacity is transmitted at high speed. By shifting to the CCITT standard procedure even when the reception allowable memory is exceeded, page-by-page processing becomes possible, and the page with memory exhaustion or paper out can be notified to the transmission side.

[0015]

According to the present invention, it is possible to omit the procedure signal between pages when transmitting a plurality of pages, which shortens the facsimile transmission time and the billing time.

[Brief description of drawings]

FIG. 1 is a diagram showing a communication procedure showing an embodiment of the present invention.

FIG. 2 is a microcomputer flowchart showing an embodiment of the present invention.

FIG. 3 is a diagram showing a conventional communication procedure.

FIG. 4 is a diagram showing an example of an HDLC frame structure.

FIG. 5 is a diagram showing an example of an NSF signal.

FIG. 6 is a diagram showing a communication procedure showing an embodiment of the present invention.

[Explanation of symbols]

 1 ... First message signal 2 ... First RTC signal 3 ... Second message signal 4 ... Second RTC signal 51 ... Country code 52 ... Maker code 53 ... Model code 57 ... Remaining memory capacity Tmin ... Conventional Time required between pages

Claims (2)

[Claims] 1. In a communication procedure of a facsimile apparatus, CCITT Recommendation T.264 is used at the time of transmission. Means for sending the encoded data and RTC specified in No. 4, and after the RTC signal, CCITT recommendation T.264. Means for transmitting the encoded data of the next page without transmitting the control signal specified in No. 30, and CCITT recommendation T.30 when receiving. Means for detecting encoded data and RTC defined in No. 4, and CCITT
Recommendation T. 30 has a means for receiving the control signal specified in No. 30, and has a mode for receiving the next page when the encoded data signal is received after the RTC is detected.
If a procedure signal is received after detection, CCITT recommendation T.264. A facsimile communication procedure having a mode of shifting to 30 procedures. 2. The facsimile communication procedure according to claim 1, wherein the transmitting side determines a threshold of the transmission data amount from the receivable data amount when the reception side instructs the receivable data amount, and the transmission data is transmitted. If the amount reaches or exceeds the threshold value, CCITT Recommendation T.264. Facsimile communication procedure characterized by shifting to 30 procedures.