JP2003244351A - Facsimile machine, and method and program for controlling facsimile machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a facsimile communication system by which original images in which single-sided and double-sided are mixed are efficiently and surely transmitted/ received, and transmission/reception is performed easily and at low costs. <P>SOLUTION: Whether image information on the surface or the backside of the original read by a reading circuit 14 is all white image information which is almost white or effective information except it is detected by control of a CPU 22. When the effective image information is detected on the backside of the original, the image information on the backside of the original is transmitted, and on the other hand, when all white image information is detected on the backside of the original, transmission of the image information on the backside of the original is omitted and a receiver is informed of presence/no presence of the image information on the backside of the original following the front surface of the original by a post message signal to be transmitted in relation to the image on the front surface of the original. When all the white image information is detected on the front surface of the original, all the white image information on the front surface of the original is transmitted without omitting it. Whether or not communication in which single-sided and double-sided are mixed is performed is informed by a facsimile process signal. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus for performing double-sided communication for transmitting double-sided image information, a control method for a facsimile apparatus, and a control program for a facsimile apparatus.

[0002]

2. Description of the Related Art A conventional facsimile machine is based on the operation of transmitting an original having one-sided information and recording it on one side. Only the one-sided communication is described in the old ITU-T recommendation T4 or T30.

On the other hand, recently, there is a growing awareness of resource saving, and printers, copying machines and the like are increasingly having a so-called double-sided recording system for recording on the front surface and the back surface of one sheet of paper. Along with this, a standard for double-sided facsimile communication was established in ITU- in February 2000.
It was recommended by T.

The new ITU-T Recommendation T. In 30 (or a tentative plan thereof), as the transmission method of the double-sided image information, the image on the front side of the document, the image on the back side is alternately transmitted for each page, both sides are alternately transmitted (alternate mode), or the entire image on the front side of the document is transmitted. For example, double-sided continuous transmission (continuous mode) for transmitting the entire image on the back side is defined.

[0005]

[Problems to be Solved by the Invention] In the two-sided communication defined in No. 30, especially the two-sided communication in the alternating mode, the transmission document information is transmitted in the order of pages from the front side to the back side. If the both-sided information and the one-sided information (the back side is all-white information) are mixed, the all-white image information on the back side of the one-sided information must also be transmitted.

For this reason, the recommendation T. When transmitting in the alternate mode based on 30, if the ratio of the one-sided information included in the document information is high, the communication time becomes long and the communication cost is wasted.

Although various attempts have been made to skip the transmission of all-white information from the era of single-sided communication, transmission / reception of double-sided information and mixed information of single-sided information has not yet been made into an ITU-T recommendation. If a part of the communication is modified and each manufacturer implements its own double-sided / single-sided mixed communication, and the specifications are disturbed, the compatibility of the communication may be impaired.

In addition, when reading book information,
Of the mixed information of single-sided information and double-sided information, the surface may be entirely white. Here, of course, the transmission control when the surface is all-white information has not been clarified by the current ITU-T recommendation, so the transmission / reception processing may be confused.

Under the circumstances as described above, there is a demand for a technique that can be carried out easily and inexpensively without significantly impairing the compatibility of communication and can efficiently transmit / receive double-sided information and mixed information of single-sided information.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile communication system which can efficiently and surely transmit / receive a mixed image of one side / both sides of a document and can be easily and inexpensively implemented.

[0011]

In order to solve the above-mentioned problems, according to the present invention, a facsimile apparatus for performing double-sided communication for transmitting double-sided image information, a method for controlling the facsimile apparatus, and a control program for the facsimile apparatus are provided. When the image information on the front side or the back side of the original to be sent / received is detected as almost white all-white image information or other effective image information, and the effective image information is detected on the back side of the original. , While transmitting the image information on the back of the original,
When the all-white image information is detected on the back side of the document, the transmission of the image information on the back side of the document is omitted, and the image on the back side of the document following the front side of the document is transmitted by the post message signal transmitted in association with the image on the front side of the document. We adopted a configuration that allows two-sided and one-sided mixed communication to notify the receiver of the presence or absence of information.

Alternatively, when the all-white image information on the front surface of the original is detected, the all-white image information on the front surface of the original is transmitted without being omitted.

Alternatively, the page number transmitted by the post message signal regarding the image information on the front side and the back side of the document is ITU-T recommendation T.264. A configuration that increments in 30 ways is adopted.

Alternatively, a configuration is adopted in which the sender information including the page number obtained by counting only the valid image information to be transmitted / received is transmitted as a part of the valid image information.

Further, a configuration is adopted in which whether or not the above-mentioned double-sided / single-sided mixed communication is performed is notified by a facsimile procedure signal.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the hardware structure of a facsimile apparatus adopting the present invention. In FIG. 1, reference numeral 2 is an NCU (network control unit), which connects the telephone network to the terminal of the line for use in data communication and controls the connection of the telephone switching network and switches to the data communication path. And holding a loop. The NCU 2 connects the telephone line 2a to the telephone 4 side (CML off) or the telephone line 2a to the facsimile machine side (CML on) according to the control from the bus 26. In the normal state, the telephone line 2a is connected to the telephone 4 side.

Reference numeral 6 denotes a hybrid circuit, which separates a transmission system signal and a reception system signal, sends the transmission signal from the addition circuit 12 to the telephone line 2a via NCU2, and sends the signal from the other side via NCU2. And is sent to the modem 8 via the signal line 6a.

Reference numeral 8 represents a modulator / demodulator, which is recommended by ITU-T Recommendation V.34. 8, V.I. 21, V.I. 27 ter, V.I. 29, V.I. 1
7, V.I. Modulation and demodulation based on 34. The modulator / demodulator 8 inputs the transmission signal from the bus 26, outputs the modulation data to the signal line 8a, inputs the reception signal output to the signal line 6a, and outputs the demodulation data to the bus 26. Each of the above-mentioned transmission modes used at that time is designated via the bus 26.

Reference numeral 10 is a calling circuit, which inputs telephone number information according to the control from the bus 26, and the signal line 10
The DTMF format selection signal is output to a.

Reference numeral 12 is an addition circuit, which is a signal line 8a.
And the information of the signal line 10a are input and the addition result is output to the signal line 12a.

Reference numeral 14 is a reading circuit capable of reading image information from both sides of the document, which is composed of an optical reading element and a document conveying system, and outputs the read data to the bus 26. In the control to be described later, the document feeding system of the reading circuit 14 reverses the front and back of the document while reversing the front and back of the first sheet.
It is assumed that the front and back of the second sheet are read in order from both sides of the original.

Reference numeral 16 is a recording circuit capable of recording double-sided information, and sequentially records the information output to the bus 26 line by line. The recording circuit 16 has a recording mechanism such as a laser beam printer, and is configured to record an image on both sides of the recording paper using a recording paper reversing mechanism (not shown).

Reference numeral 18 is a memory circuit, which is a RAM.
(Or a readable / writable memory such as a hard disk drive) and is used as a work area of the CPU 22 described later. In addition to storing the read or received image data in the form of raw data or encoded data, other control data is also stored. Memory circuit 1
Access to 8 is made via bus 26.

Reference numeral 20 denotes an operation unit, which includes a one-touch dial, speed dial, ten keys, * key, # key, start key, stop key, set key, double-sided transmission selection key, and other function keys. The operation information of is output to the bus 26. The operation unit 20 is provided with a display unit including a display element such as an LCD, and is used as a user interface for monitoring the operating state of the device and making various settings. Operation part 2
The access of 0 is performed via the bus 26.

Reference numeral 22 is a CPU (Central Processing Unit), which controls the operation of the entire facsimile and executes the facsimile transmission control procedure, and the control program thereof is stored in the ROM 24. Reference numeral 26 is the CPU 22
This bus consists of an address bus and a data bus.

Here, with reference to FIGS. 2 to 11, an outline of a communication procedure for double-sided communication and double-sided / single-sided mixed communication in the present embodiment will be described.

ITU-T Recommendation T. There are two communication modes of double-sided transmission defined by 30: an alternate mode (double-sided alternate transmission mode) and a continuous mode (double-sided continuous transmission mode). The former is a mode in which the front side, the back side of the first page, the front side of the second page, the back side, ... And the front side and the back side of each original are alternately transmitted. In the latter case, only the front side of the first page, the front side of the second page, etc. and the front side of the original are first transmitted in the page order, and then the back side of the first page, the back side of the second page ... and the back side of the original are all transmitted in the page order. This is the transmission mode.

In the double-sided / single-sided mixed transmission of the present embodiment, the transmission of the back side corresponding to the front side is skipped by the facsimile procedure signal (specifically, the Q signal or the PPS-Q signal) after transmitting the front side. Allows you to specify whether to (do not send). In addition, whether or not to perform the double-sided / single-sided mixed transmission in this embodiment is determined by negotiation between the transmitter and the receiver based on a procedure signal used in the pre-facsimile procedure.

FIG. 2 shows the D used in the facsimile pre-procedure.
The structure of an IS / DTC / DCS signal is shown. Figure 2 shows DI
S (digital identification: transmitted from the image receiving station), DT
C (digital transmission command: transmitted from the image transmission station),
And the FIF (facsimile information field) structure of each procedure signal of DCS (digital command: transmitted from image transmitting station) is shown in a table format.

As shown in FIG. 2, in the DIS / DTC signal, double-sided recording in the alternating mode is performed by the X-th bit of the FIF (the number of bits is indicated by "X" in the figure, but actually 113). The presence or absence of the function is indicated, and the presence or absence of the double-sided recording function in the continuous mode is indicated by the X + 1 (114th) bit of the FIF. In the DCS signal, double-sided transmission in the alternating mode is designated by the X (113th) bit of FIF, and double-sided transmission in the continuous mode is designated by X + 1 (114th) bit of the FIF. According to the regulations, when setting the X + 1 bit to 1, it is necessary to set the X bit to 1.

The above X and X + 1 bits are ITU-T
Recommendation T. Bits already defined in 30 are well known, but in the present embodiment, Z and Z + 1 bits are further provided (bit positions are arbitrary).

The Z and Z + 1 bits are used for declaring the double-sided / single-sided mixed mode of the present embodiment, and DIS.
In / DTC / DCS, the Z bit declares the presence / absence of the double-sided / single-sided mixed mode in the alternate mode, and the Z + 1 bit declares the presence / absence of the double-sided / single-sided mixed mode in the continuous mode. DIS / DTC signal from the receiving side,
The CS signal is a procedure signal sent from the transmitting side. In addition,
Similar to the X and X + 1 bits, when the Z + 1 bit is set to 1, the Z bit is also set to 1.

As will be described later, in double-sided communication, a post message signal, that is, a Q signal in normal G3 transmission (specifically, EOP, MPS, or
EOM) and a PPS-Q signal in ECM transmission (specifically, PPS-EOP or PPS-MPS,
Alternatively, PPS-EOM or PPS-NUL
L) exchanges information relating to double-sided communication control.

FIG. 3 shows a Q signal (E) in normal G3 transmission.
OP (end of page), MPS (multi-page), EOM (end of message) signal, etc.),
In addition, PPS-Q in ECM (error correction mode) transmission
The frame structure of the signal (post-message signal such as PPS-EOP, PPS-MPS, PPS-EOM, or PPS-NULL) is shown.

As shown in FIG. 3, in these post message signals, facsimile information is transmitted following Flag (flag), Address (address), Control (control data), and FCF (facsimile control field). At the beginning of the facsimile information, three fields of PC (page counter), BC (block counter), and FC (frame counter) are transmitted only in the case of ECM, followed by facsimile information relating to double-sided transmission. Facsimile information related to duplex transmission is Length
h (following Page number (2 octets) and P
age information (currently 1 octet total octets), Page number
(Page number: 2 octets), Page inf
Ormation (page information) continues, and then FC
S (frame check sequence) and Flag (flag) follow. Note that the Q signal used in normal G3 communication does not include PC, BC, and FC, and is used only in the PPS-Q signal used in ECM communication.

Among the above, Page number (also referred to as page number: PN) is added by one page from P1 for each of the front and back sides when a two-sided original is transmitted in the order of pages, front side and back side, according to the convention. It is supposed to be done.

In addition, the Page information
The (page information) has a data width of 1 octet and indicates whether the image information of the surface is the front side or the back side, and the front side (0) or the back side (1) is represented by bit0 (SIDE information).

The current ITU-T Recommendation T.264. At 30, Pa
Bits 1 to 6 of the ge information (page information) are reserved bits and their functions are not defined, and bit 7 is always set to 0 as an extension bit. Use 1. This bit 1 is valid only when bit 0 designates the front surface (0), and "0" indicates that the back surface corresponding to this front surface exists, and "1" indicates that this front surface exists. Declare that there is no corresponding backside.

That is, although the overall frame structure of the post message signal shown in FIG. 3 is the same as the conventional one, in the present embodiment, the bit 1 of the page information (page information) of the post message signal transmitted with respect to the image on the front surface of the document is transmitted. Is used to control the transmission of information on the back side of the original corresponding to the front side of the original.

FIGS. 4 to 11 show the states of double-sided communication and double-sided / single-sided mixed communication in the form of signal sequences. 4 to 7 show known double-sided communication, and FIGS. 8 to 11 show double-sided and single-sided mixed communication according to the present invention.

First, known double-sided communication will be described with reference to FIGS.

FIG. 4 shows the state of double-sided transmission in the alternating mode in the normal G3 mode, FIG. 5 shows the state of double-sided transmission in the alternating mode in the ECM communication mode, and FIG. 6 shows the double-sided transmission in continuous mode in the normal G3 mode. FIG. 7 shows the state of double-sided transmission in the continuous mode in the ECM communication mode.

As shown in FIGS. 4 to 7, the double-sided transmission function (both alternating and continuous) of the receiver is shown by the x and x + 1 bits of the DIS signal, and the transmitter is shown by the x and x + 1 bits of the DCS signal. The two-sided transmission mode that will be executed by will be declared. In the continuous mode of FIGS. 6 and 7, it is declared that the x + 1 bit of the DCS signal is set to 1 to perform transmission in the continuous mode.
Whether to use the ECM is controlled by the bit 27 of the FIF of these procedure signals.

As shown in FIGS. 4 and 6, the MPS signal is used as the post message signal in the normal mode, and as shown in FIGS. 5 and 7, the PPS-signal is used as the post message signal in the ECM. The MPS signal is used.

Here, three double-sided originals are transmitted, and "PN" in each figure is the above-mentioned Page Number.
Is shown.

For example, the first M in FIG. 4 (alternate mode)
The PS signal is “MPS (PN = 1,0 (front s
)) ”, which is page number 1 (PN = 1), front (0 (front side)).
Image information has been transmitted (see MP in FIG. 4 and subsequent figures).
The notation of S or PPS-MPS signal has the same meaning as above).

That is, in the alternate mode of FIGS. 4 and 5, the first sheet (PN = 1) of the table (0) and the first sheet (PN =).
2) back (1), 2nd (PN = 3) front (0), 2nd (PN = 4) back (1), 3rd (PN = 5) front (0), The image information of the original is transmitted in the order of the back (1) of the third sheet (PN = 6).

In the continuous mode shown in FIGS. 6 and 7,
First sheet (PN = 1) table (0), second sheet (PN = 3) table (0), third sheet (PN = 5) table (0), first sheet (P
N = 2) back (1), second (PN = 4) back (1),
The image information of the original is transmitted in the order of the back (1) of the third sheet (PN = 6).

In the two-sided communication of FIGS. 4 to 7, it is assumed that both the bit Z and the bit Z + 1 are 0. 4 to 7, the page information of (PPS-) MPS of each post message signal is shown.
Although the bit 1 of n is not described, the state of this bit 1 may be appropriately determined because it is not referred to in the well-known two-sided communication of FIGS. 4 to 7. For example, 0 indicating that there is a back surface may be set.

Next, double-sided / single-sided mixed communication according to the present embodiment will be described with reference to FIGS. Figure 8 (alternate mode: non-EC
M), FIG. 9 (alternate mode: ECM), FIG. 10 (continuous mode: non-ECM) and FIG. 11 (continuous mode: ECM).
Correspond to FIGS. 4, 5, 6 and 7, respectively.

In FIGS. 8 and 9, the receiver uses the F signal of the DIS signal.
Bit Z and bit Z + 1 of IF are set to 1, and transmitter is DC
The bit Z of the FIF of the S signal is set to 1 and the bit Z + 1 is set to 0, and it has been decided to perform the double-sided / single-sided mixed communication in the alternate mode. In FIGS. 10 and 11, the receiver sets the bit Z and the bit Z + 1 of the FIF of the DIS signal to 1
Then, the transmitter determines that both the bit Z and the bit Z + 1 of the FIF of the DCS signal are set to 1 to perform the double-sided / single-sided mixed communication of the present embodiment in the continuous mode. EC
Whether or not to use M is controlled by bit 27 of the FIF of these procedure signals.

Further, in FIGS. 8 to 11, the page info of the (PPS-) MPS of each post message signal is shown.
Bit 1 of rmation has meaning.

That is, FIGS. 8 to 11 show transmission / reception of three originals. The first and third sheets are double-sided information, the second sheet is single-sided information, and the second sheet is second-side information. Of the post message signal (PPS-) transmitted following the image of the surface of the
Bit 1 of MPS Page information
Is set to "1", indicating that the transmission of the image on the back side of the second sheet is skipped. In addition, the post message signal (P
In PS-) MPS, Page information
Bit 1 of n is set to “0”, which indicates that there are backside images corresponding to these front sides, and that image is transmitted.

Next, the communication control to be executed by the CPU 22 for carrying out the facsimile communication of this embodiment will be described with reference to FIGS.
This will be described with reference to FIG.

The outline of the communication control of this embodiment is as follows.

(1) It is detected whether the image information on the front side or the back side of the document to be transmitted / received is almost white all-white image information or other effective image information, and the all-white image is printed on the back side of the document. When the information is detected, the both-sided and one-sided mixed communication is performed in which the transmission of the image information on the back side of the document is omitted.

(2) In the transmission of a mixed original of both sides and one side, the presence of the corresponding back side is designated by the bit 1 of the page information of the FIF of the post message signal (Q signal) relating to the front side image.

(3) Facsimile procedure signal (DIS / DCS / DTC) indicating whether or not the above-mentioned double-sided / single-sided mixed communication is performed
Declare by bit Z and bit Z + 1 of the FIF of

The control of FIGS. 12 to 27 is for performing the above-mentioned communication control.

The control procedure of FIGS. 12 to 27 is stored in the ROM 24 as a program of the CPU 22. 12-
FIG. 27 is a flow chart showing the flow of processing for realizing the above communication control.
The parts with the same number in are consecutive at each position.

FIGS. 26 and 27 schematically show the overall flow of the control procedure shown in detail in FIGS. 12 to 25. First, the overall flow of the control procedure will be described with reference to FIGS. 26 and 27. The step numbers in parentheses in the following description of FIGS. 26 and 27 are the step numbers of FIGS. 12 to 25 described later.

In FIG. 26, step S300 shows the beginning of the process started by a predetermined reset operation or the like.

After the processing is started, in step S302, the memory circuit 18 and each part of the apparatus are initialized (steps S2 to S6 in FIG. 12).

In step S304, it is determined whether or not the double-sided transmission is selected based on the operation information of the operation unit 20, and if the step is affirmative, step S308.
And if the step is denied, step S3
Proceed to 06 to perform other processing (copying original images, etc.)
Is executed (step S10 in FIG. 12).

In step S308, information on both sides of the document information is read and stored while checking whether it is all-white information in the memory (step S12-FIG. 12).
Step S30).

In step S310, call connection and the like are executed (steps S32 to S36 in FIG. 13).

In step S312, it is determined whether or not the back side information of all the read originals is all white. If the step is affirmative, the process proceeds to step S314, and if the step is negative, the step is step S314. Proceed to S318 (Fig. 1
3 step S38).

In step S314, single-sided information is transmitted (steps S40 to S70 in FIGS. 13 to 15). Here, the information to be transmitted is a one-sided original as shown in FIG. P1 to P3 in FIG. 28 indicate the number of documents as the physical number of pages. Further, below each document surface, the value of a later-described transmission page counter at the time of processing each document surface is shown. In FIG. 28, since the transmission is compatible with the conventional one-sided procedure, the back side is not processed. Here, the page number (PN) by the post message signal and other information related to the double-sided procedure are not transmitted.

In step S316, the communication number is incremented (step S72 in FIG. 14).

In step S318, it is determined whether or not there is all-white information in the back surface information of the read document. If the step is affirmative, the process proceeds to step S320, and if the step is negative, the step is step S320. The process proceeds to S328 (step S74 in FIG. 15).

In step S320, it is determined whether or not the Z bit of the FIF of the received DIS signal is 1, and if the step is affirmative, the process proceeds to step S322.
If the step is denied, the process proceeds to step S324 (step S78 in FIG. 15).

In step S322, transmission is performed using the double-sided / single-sided mixed protocol of this embodiment (FIGS. 15 to 19).
Steps S80 to S148). Here, the information to be transmitted is a double-sided / single-sided mixed original as shown in FIG. In FIG. 29, the front side of the first sheet and the back side of the second sheet are all white, the front side of the first sheet transmits image information of all white without adding the sender information, and the back side of the second sheet is Skip without sending. The "page number" in FIG. 29 is the page number (PN) of the above post message signal, and the increment method is recommended by T. 30 compatible. On the other hand, the transmission page counter displays the document surface to which the image information has been transmitted (the surface to which the all-white information has been transmitted, including the first sheet, for example).
Is counting the number of.

In step S324, it is determined whether the X bit of the FIF of the DIS signal received from the receiver is 1, and if the step is affirmative, step S32 is performed.
Go to step 6, and if the step is denied, step S
The process proceeds to 330 (step S150 in FIG. 19).

In step S326, the double-sided / single-sided mixed information is transmitted. Here, the transmission is performed by the double-sided protocol compatible with the known double-sided procedure (steps S152 to S216 in FIGS. 19 to 22). Here, the image to be transmitted is a double-sided / single-sided mixed original as shown in FIG. In FIG. 30, the front and back of the first sheet are all white, but since the double-sided protocol compatible with the known double-sided procedure is used here, the front and back of the first sheet are not shown. All of them transmit all white information without adding sender information. The "page number" in Fig. 30 is the page number (PN) of the above post message signal, and the increment method is recommended by T. 30 compatible. In addition, the transmission page counter counts the number of document surfaces that have transmitted image information (including the surface that has transmitted all-white information, the front side of the first sheet, and the back side of the second sheet).

In step S328, it is determined whether or not the X bit of the FIF of the received DIS signal is 1, and if the step is positive, the process proceeds to step S326.
If the step is denied, the process proceeds to step S330 (step S76 in FIG. 15).

In step S330, the double-sided / single-sided mixed information is transmitted, but since the receiver does not support the double-sided protocol at all, the single-sided protocol is used.
(Steps S218 to S26 of FIGS. 23 to 25)
2). In the image transmitted here, the front side of the first sheet and the back side of the second sheet are all white as shown in FIG. Here, the faces (not all white) having an effective image are sequentially transmitted by the one-sided protocol. The front and back of the completely white first sheet are not transmitted. Here, the page number (PN) by the post message signal and other information related to the double-sided procedure are not transmitted. The transmission page counter counts the number of document surfaces that have transmitted the image information.

Details of the above communication control will be described below with reference to FIGS. 12 to 25.

In FIG. 12, step S0 indicates the beginning of the process started by a predetermined reset operation or the like.

In step S2, the areas required for controlling the memory 18 are initialized via the bus 26.
Here, in particular, the communication number is cleared to 0001.

In step S4, the display section of the operation section 20 is cleared via the bus 26. In step S6, the CML of the NCU 2 is turned off via the bus 26, and the line 2a
Is connected to the telephone 4 side.

In step S8, the information of the operation unit 20 is input through the bus 26, and it is determined whether or not the transmission of the double-sided original is selected. If the step is affirmative, the process proceeds to step S12. If the step is denied, the process proceeds to step S10, and other processes (copying the original image, etc.) are executed.

In step S12, the read number counter K
Is reset to 1. The read number counter K is a counter for counting the number of physical pages, that is, the number of originals (one side or both sides).

In step S14, the surface flag is set to the table. The surface flag is a value such as 0 or 1 and indicates whether the document surface currently being processed is the front surface or the back surface.

In step S16, the reading circuit 14 reads the information indicated by (the number-of-reading counter K, surface), encodes it, and stores it in the image memory area of the memory circuit 18.

In step S18, it is determined whether the document image read in step S16 is (almost) all white. This is performed by, for example, determining whether or not the percentage occupied by the number of black dots is 0.1% or less (this reference value may be arbitrarily determined by those skilled in the art). Here, if the image is almost completely white, the process proceeds to step S20, and if the image does not include all white and includes an effective image, the process proceeds to step S22 in FIG.

In step S20, the fact that the corresponding image is all white is stored in a predetermined area of the memory circuit 18 in association with the (reading number counter K, surface flag).

In step S22 of FIG. 13, it is determined whether or not the current face flag is the back side. If the step is affirmative, the process proceeds to step S26, and if the step is negative, the step S24. Proceed to.

In step S24, the back side is set in the face flag in order to proceed to the back side reading process.

In step S26, the outputs of the sensors of the reading circuit 14 are checked to determine whether there is a next page to be read. If there is a next page, step S28
Go to step S32 if there is no next page.

In step S28, the table is set in the surface flag in order to proceed to the processing of the table of the next original.

In step S30, the value of K is incremented by 1, the process loops to step S16, and reading is continued.

If the reading is completed in step S26, the transmission process starts from step S32. Step S3
In 2, the CML of the NCU 2 is turned on via the bus 26, and the line 2a is connected to the facsimile device (hybrid circuit 6) side.

In step S34, the calling circuit 10 is controlled via the bus 26 to call the designated destination. The destination is designated by the ten-key pad or one-touch key of the operation unit 20.

In step S36, a facsimile pre-procedure is executed.

In step S38, it is determined whether or not the read back surface is full page full white information. If the back side is all-page all-white information, that is, if the originals are all single-sided originals, the process proceeds to step S40, and if there is valid information even on one side, the process proceeds to step S74 in FIG.

In step S40, the remaining pre-facsimile procedure is executed. Here, since the one-sided procedure is used,
The X, X + 1, Z, and Z + 1 bits of the FIF of the DCS signal are all 0.

In step S42 of FIG. 14, 1 is set in the transmission page counter. The transmission page counter counts the number of pages (the number of document surfaces) that actually transmitted some image information (including all white information).

In step S44, 1 is set in the source page counter. The source page counter counts the number of pages to be transmitted as source information at the beginning of image information (P1, P2 ... In FIG. 28). The information on the page number of the transmission source information is generated as an image using a character generator or the like based on the value of the transmission source page counter.

In step S46, the transmission number counter L
Is reset to 1.

In step S50, a table is set in the surface flag.

In step S52, source information including information on the number of pages is added to a predetermined portion (for example, the head portion) of the original image based on the value of the source page counter, and the (transmission number counter L, face flag) is set. Send information.

In step S54, it is determined whether or not the transmission of one page (one side) is completed. If the step is affirmed, the process proceeds to step S56, and if not, the process proceeds to step S52.

In step S56, it is determined whether there is a next page to be transmitted. If the step is affirmative, the step S58 is performed. If the step is negative, the step S58 is performed.
Proceed to 66.

In step S58, the value of the transmission page counter is incremented by 1.

In step S60, the value of the source page counter is incremented by 1.

In step S62, the transmission number counter L
The value of is incremented by one.

In step S64, an intermediate procedure is executed.

In step S66, the post-facsimile procedure is executed.

In step S68, via the bus 26,
The CML of NCU2 is turned off and the line 2a is connected to the telephone 4 side.

In step S70, the value of the one-sided transmission / transmission page counter is set to the memory circuit 1 corresponding to the communication number.
8 is stored in a predetermined area. This information is stored as so-called communication management information. Based on this information, the one-sided transmission protocol was used when the communication management report was output (printed, etc.), and how many pages (number of pages) were transmitted. It can be output.

In step S72, the value of the communication number is incremented by 1, and the process returns to step S6.

If there is even one piece of valid information on the back surface in step S38, it is determined in step S74 of FIG. 15 whether there is any white information on the back surface. If there is all-white information on the back side, that is, if both-sided document and one-sided document are mixed, the process proceeds to step S78.

If the valid information is present on all the back sides, in step S76, the F of the DIS signal sent by the receiver is sent.
It is determined whether the X bit of IF is 1. If the step is affirmative, that is, if the receiver supports double-sided transmission, the process proceeds to step S152 in FIG. 19, and if the step is negative, that is, if the receiver does not support double-sided transmission, then FIG. 23, and proceeds to step S218.

On the other hand, if it is confirmed in step S74 that both sides and one side are mixed, in step S78 the DI of the receiver is received.
It is determined whether or not the Z bit of the FIF of the S signal is 1. That is, it is determined whether or not the receiver supports the double-sided / single-sided mixed protocol of the present embodiment. If the receiver supports the double-sided / single-sided mixed protocol of the present embodiment, the reception is performed in step S80. If the machine does not support the double-sided / single-sided mixed protocol of this embodiment, the process proceeds to step S150.

If the receiver supports the double-sided / single-sided mixed protocol of this embodiment, the remaining facsimile pre-procedure is executed in step S80. Where D
The Z bit of the FIF of the CS signal is set to 1, and the receiver is instructed to use the double-sided / single-sided mixed protocol of this embodiment.

At step S82, the communication number
Set the number of pages whose back side is all white (excluding the last page) to the all white information skip page counter.

At step S84, the communication number corresponding to
The page counter including all-white information is set to 2K if the last back page is not all white, and set to 2K-1 if the last back page is all white (K is the final value of the read number counter). .

The page counters set in steps S82 and S84 are stored as communication management information, and based on these page count information, when outputting a communication management report (printout, etc.), both sides of the present invention are printed. Information such as the number of pages read (the number of pages), the number of pages transmitted (the number of pages), and the number of the skipped pages (the number of pages) can be output by using the mixed protocol.

In step S86, the transmission page counter is set to 1.

At step S88, the transmission number counter L
Set 1 to.

A step S92 sets 1 to the page number. This "page number" is a page number (PN) transmitted by a post message signal, that is, a (PPS-) Q signal.

In step S94, a table is set in the surface flag.

In step S96 of FIG. 16, 0 is set in the source page counter. This is because the source page number is not used for all white pages, and the source page counter is incremented in step S104 described later before image transmission.

In step S98, it is determined whether the surface flag is a table, and if the surface flag is a table, step S10.
0, and if the surface flag is not a table, step S in FIG.
Proceed to 140.

In step S100, whether the information of (transmission number counter L, face flag) is all white, that is,
It is determined whether or not the surface to be transmitted is all white. If the step is affirmed, the process proceeds to step S102, and if not, step S104.
Proceed to.

In step S102, all-white information is transmitted without adding source information (in the double-sided / single-sided mixed mode of this embodiment, the all-white surface is transmitted: FIG. 29).

On the other hand, if the surface is not completely white, the value of the transmission source page counter is incremented by 1 in step S104, and the transmission source information is added in step S106 (transmission number counter L, surface flag). Image information is transmitted.

In step S108, it is determined whether or not the information of (transmission number counter L, back side) is all white, that is, whether the back side following the front side that has just been transmitted is all white. When the step is affirmed, step S110
If the answer is NO, the process proceeds to step S130 in FIG.

If the back surface following the front surface that has just been transmitted is wholly white, transmission of the PPS-Q signal is executed in step S110. Here, the page number (PN) and the surface information (SIDE) are notified regarding the front surface that has just been transmitted, and bit 1 of Page information is set to 1 to notify that the back surface is skipped.

In step S112, it is determined whether there is a next page to be transmitted. If there is a next page, the process proceeds to step S120, and if not, the process proceeds to step S114.

In step S114, the facsimile post-procedure is executed.

In step S116 of FIG. 17, the bus 26
Then, the CML of NCU2 is turned off, and the line 2a is connected to the telephone 4 side.

In step S118, the double-sided / single-sided mixed transmission, the transmission page counter, and the transmission source page counter are stored in correspondence with the communication number. After step S118, the process proceeds to step S72, increments the communication number, and then returns to step S6.

On the other hand, if there is a next page to be transmitted in step S112, that is, if the next page follows the skipped back surface, the value of the page number is incremented by 2 in step S120.

At step S122, the value of the transmission page counter is incremented by one.

At step S124, the value of the transmission number counter L is incremented by one.

In step S126, the surface flag is set to the table.

In step S128, an intermediate procedure is executed.

After step S128, the process loops to step S98 described above.

On the other hand, if it is determined in step S108 that the information of (transmission number counter L, back surface) is not all white, that is, the back surface following the front surface that has just been transmitted is not all white, then in step S130 of FIG. , PPS-Q
Send a signal. Here, the page number (PN) and the surface information (SIDE) are notified about the front side that has just been transmitted, and bit 1 of Page information is set to 0 to notify that the back side is not skipped.

In step S132, an intermediate procedure is executed.

In step S134, the value of the page number is incremented by 1.

In step S136, the value of the transmission page counter is incremented by 1.

In step S138, the back side is set in the face flag.

After step S138, the process loops to step S98 described above.

On the other hand, if the face flag is the back side in step S98 (it passes through here in the case of the back side processing not skipped), the value of the source page counter is incremented by 1 in step S140.

In step S142, the sender information is added and the image information corresponding to (transmission number counter L, face flag) is transmitted.

A step S144 executes the transmission of the PPS-Q signal. Here, the page number (PN) and the surface information (SIDE) are notified regarding the back surface that has just been transmitted, and bit 1 of Page information is set to 0 to notify that the back surface is not skipped. Although the back side is transmitted now, this bit 1 is not referred to by the receiving side (the back side of the back side does not exist).

Subsequently, in step S146 of FIG. 19, it is determined whether or not there is a next page to be transmitted. If there is a next page, the process proceeds to step S148, and if there is no next page, the process proceeds to the facsimile post-procedure in step S114.

In step S148, the page number value is incremented by 1, and step S122 in FIG.
And proceeds to step S128 to loop to step S98 in FIG.

On the other hand, when the receiver does not support the double-sided / single-sided mixed protocol of this embodiment in step S78, the DIS of the receiver is detected in step S150.
It is determined whether the X bit of the FIF of the signal is 1.
If the X bit of the FIF of the DIS signal of the receiver is 1, that is, if the receiver supports the standard double-sided procedure, the process proceeds to step S152, and if not, the process of FIG.
3 to step S218.

In step S152, the remaining pre-facsimile procedure is executed. Here, the X of the FIF of the DCS signal
Declare bit 1 and use normal double-sided procedure.

In step S154, 0 is set in the all-white information skip page counter corresponding to the communication number.

In step S156, 2K is set to the page counter corresponding to the communication number and including all white information (K is the final value of the read number counter).

In step S158, the transmission page counter is set to 1.

At step S160, 1 is set in the transmission number counter L.

In step S164, 1 is set to the page number used in the post message signal.

Then, in step S166 of FIG. 20, a table is set in the surface flag.

In step S168, 0 is set in the sender page counter used in the sender information.

In step S170, it is determined whether the surface flag is a table, and if the surface flag is a table, step S1.
Proceed to 72, and if the face flag is back, step S in FIG.
Proceed to 190.

In step S172, it is determined whether or not the information indicated by (the number-of-reading-counter L, surface flag) is all white. If the step is affirmed, step S17
Go to 4. If the step is denied, step S
Proceed to 186.

If the all-white surface is detected (on the front surface) in step S172, the all-white information is transmitted without adding the sender information in step S174.

Subsequently, in step S176, (PPS-
Q) Send a signal. Here, the page number (PN) and the surface information (SIDE) of the surface just transmitted are notified. Since the standard double-sided procedure is used here, bit 1 of Page information is recommended by T. Set it to 0 as 30.

In step S178, the page number value is incremented by one.

In step S180, the value of the transmission page counter is incremented by 1.

In step S182, the back side is set in the face flag.

In step S184, the intermediate procedure is executed, and the process loops to step S170.

On the other hand, if no white surface is detected (on the front side) in step S172, the value of the transmission source page counter is incremented by 1 in step S186.

In step S188, the transmission source information is added and the image information indicated by (the number-of-reading counter L, the surface flag) is transmitted.

On the other hand, if it is determined in step S170 that the processing is for the back surface, in step S190 in FIG.
It is determined whether or not the information indicated by (the number-of-reading counter L, the surface flag) is all white, and if the step is affirmative, the process proceeds to step S192, and if No, the process proceeds to step S21.
Go to 4.

In step S192, all-white information is transmitted without adding the sender information.

A step S194 executes transmission of the PPS-Q signal. Here, the page number (PN) and the surface information (SIDE) of the back surface just transmitted are notified. In addition, since the standard double-sided procedure is used here,
Bit 1 of Page information is recommended by T.M. Set it to 0 as 30.

In step S196, it is determined whether there is a next page to be transmitted, and if there is a next page, step S196 is executed.
If there is no next page, the process proceeds to step S204.

In step S198, the page number value is incremented by 1.

In step S200, the value of the transmission page counter is incremented by 1.

In step S202, a table is set in the face flag.

In step S210, the value of the number-of-reads counter L is incremented by one, and in step S212, the intermediate procedure is executed and then the process loops to step S170.

On the other hand, if all white information is not detected on the back surface in step S190, then in step S214,
The value of the transmission source page counter is incremented by one, and in step S216, the transmission source information is added and the image information indicated by (the number-of-reading-counter L, the surface flag) is transmitted,
It proceeds to step S194.

If there is no next page in step S196, the post-facsimile procedure is executed in step S204 of FIG. 22. In step S206, the bus 26 is used to execute the post-facsimile procedure.
Turn off the CML of NCU2.

Further, in step S208, either the double-sided information (the processing from step S152 is executed even if all rear surfaces exist) or the both-sided / single-sided mixed information is transmitted in correspondence with the current communication number. The values of the current transmission page counter and the transmission source page counter are stored. These pieces of information can be used when a communication management report is output (printed out, etc.), so that the user can know what kind of communication processing has been performed.

On the other hand, step S76 or step S1
If the receiver does not support double-sided transmission at 50, the remaining pre-facsimile procedure is executed at step S218 of FIG. Here, the FIF of the DCS signal
The X, X + 1, Z, and Z + 1 bits of are all 0. That is, it is declared thereafter that the one-sided protocol is used.

Subsequently, in step S220, 0 is set in the transmission page counter.

In step S222, 1 is set in the transmission number counter L.

In step S226, a table is set in the surface flag.

In step S228, 0 is set in the source page counter.

In step S230, it is determined whether or not the information indicated by (transmission number counter L, face flag) is all white. If all white surfaces are detected, step S23
2, the process proceeds to step S248 of FIG. 24 if the entire white surface is not detected.

In step S232, it is determined whether the surface flag is a table, and if the surface flag is a table, step S2.
34, and if the face flag is back, the process proceeds to step S236.

In step S234, the back side is set in the face flag in order to shift to the back side processing.

In step S236, it is determined whether there is a next page to be transmitted. If there is a next page, the process proceeds to step S240, and if there is no next page, step S238.
Proceed to.

In step S240 (when there is a next page), a table is set in the face flag, and further step S24.
At 2, the value of the transmission number counter L is incremented by 1, and then the process loops to step S230. In this way
In the one-sided protocol, transmission of image information is skipped for all white sides (see FIG. 31).

In step S238, a post-facsimile procedure is executed, and the flow advances to step S244 in FIG.

In step S244 of FIG. 24, the bus 26
Then, the CML of NCU2 is turned off, and the line 2a is connected to the telephone 4 side.

In step S246, whether the both-sided information or the one-sided transmission of the both-sided / single-sided mixed information is performed corresponding to the communication number, the current transmission page counter, the transmission source page counter, etc. are stored. This information is
This can be used when outputting a communication management report (printout, etc.), which allows the user to know what kind of communication processing has been performed. Step S246
After that, the process proceeds to step S72, increments the communication number, and then returns to step S6.

On the other hand, if the entire white surface is not detected in step S230, the value of the transmission source page counter is incremented by 1 in step S248.

Subsequently, in step S250, the value of the transmission page counter is incremented by one.

In step S252, the sender information is added and the image information of (transmission number counter L, face flag) is transmitted.

In step S254, it is determined whether the surface flag is a table. If the face flag is front, the process proceeds to step S256, and if the face flag is back, the process proceeds to step S260.

In step S256, the back side is set in the face flag.

A step S258 executes an intermediate procedure,
It loops to step S230.

In step S260, it is determined whether there is a next page to be transmitted. If there is a next page to be transmitted here, the process loops to step S240, and if there is no next page, the process proceeds to step S262 in FIG. 25 to execute the post-facsimile procedure. After step S262, the process proceeds to step S244 described above.

As described above, in the present embodiment, in the case of the both-sided and one-sided mixed communication, the image information on the front side or the back side of the document to be transmitted / received is all-white image information of almost all white, or other information. If it detects valid image information, and if valid image information is detected on the back side of the document, the image information on the back side of the document is transmitted, while if all-white image information is detected on the back side of the document, Since the transmission of the image information on the back side of the document is omitted and the post message signal transmitted in relation to the image on the front side of the document is notified to the receiver whether or not there is image information on the back side of the document following the front side of the document, efficiency is improved. You can send and receive original / mixed images on one side / both sides well and surely.
UT Recommendation T.T. Since the configuration of 30 is not largely changed, there is an excellent effect that it can be implemented easily and inexpensively and that communication compatibility is not impaired.

Further, in this embodiment, when the all-white image information is detected on the front side of the document, the all-white image information on the front side of the document is transmitted without omission, and the presence or absence of the back side is designated. A post message signal for performing the communication can be transmitted to the receiving station, and double-sided / single-sided mixed communication can be reliably executed.

Further, in the present embodiment, the page number transmitted by the post message signal regarding the image information on the front surface and the back surface of the document is ITU-T recommendation T.264. Since the number of increments is 30, the ITU-T recommendation T. The configuration of 30 can be implemented easily and inexpensively without largely changing the configuration, and the compatibility of communication is not impaired.

Further, in this embodiment, the sender information including the page number counting only the valid image information to be transmitted / received is transmitted as a part of the valid image information. The source information is not printed (or as a footer or the like), and the user is not given a strange impression.

Further, whether or not the double-sided / single-sided mixed communication of this embodiment is performed is notified by a facsimile procedure signal, and after confirming that the receiving side supports the double-sided / single-sided mixed communication of the present embodiment, both-sided / single-sided communication Since communication is performed, communication compatibility is not impaired.

Further, since whether or not the double-sided / single-sided mixed communication is performed and the values of counters used in the double-sided / single-sided mixed communication are stored as the communication management information, such information is stored in the communication management report or the like. Output as (display,
By printing, etc., the user or maintenance company can grasp the details of the executed communication in detail. In particular, since the user and maintenance company can know the number of document sides that have skipped transmission and the number of document sides that actually transmitted image data, use this information for daily communication management and maintenance work. You can

Although the configuration of the facsimile dedicated machine has been described above, it goes without saying that the present invention can be implemented not only in the facsimile dedicated machine but also in other types of facsimile machines. For example, in the present invention, a general-purpose terminal such as a personal computer is externally / internally equipped with a FAX modem or the like,
It can also be implemented in a configuration in which facsimile communication is performed by software control. In that case, the control program of the present invention can be stored and supplied not only in the ROM 24 described above but also in any computer-readable storage medium such as a hard disk, a flexible disk, an optical disk, a magneto-optical disk or a memory card. Further, it goes without saying that the present invention can be implemented in a so-called digital multi-function peripheral in which a FAX communication interface or a network interface is attached to the image forming apparatus.

[0209]

As is apparent from the above description, according to the present invention, the image information on the front surface or the back surface of the document to be transmitted / received is all white image information of almost all white, or other effective image information. Information is detected, and if valid image information is detected on the back side of the document, the image information on the back side of the document is transmitted, while if all-white image information is detected on the back side of the document, the back side of the document is detected. The transmission of image information is omitted, and a configuration is used in which double-sided / single-sided mixed communication is used to notify the receiver of the presence or absence of image information on the back side of the original following the front side of the original by a post message signal transmitted in relation to the image on the front side Therefore, it is possible to omit the transmission of the back side of the all-white original, and efficiently
Further, it is possible to provide an excellent effect that it is possible to provide a facsimile communication system which can surely transmit / receive a single-sided / double-sided mixed original image and which can be implemented at low cost.

[Brief description of drawings]

FIG. 1 is a block diagram showing a hardware configuration of a facsimile apparatus adopting the present invention.

FIG. 2 DIS / DTC used in double-sided transmission according to the present invention
FIG. 6 is a table showing the FIF of a DCS signal.

FIG. 3 is an explanatory diagram showing a format of a post message signal used in double-sided transmission of the present invention.

FIG. 4 is an explanatory diagram showing a state of double-sided communication in an alternating mode in a known non-ECM communication mode.

FIG. 5 is an explanatory diagram showing a state of double-sided communication in an alternating mode in a known ECM communication mode.

FIG. 6 is an explanatory diagram showing a state of double-sided communication in a continuous mode in a known non-ECM communication mode.

FIG. 7 is an explanatory diagram showing a state of double-sided communication in a continuous mode in a known ECM communication mode.

FIG. 8 is an explanatory diagram showing a state of double-sided / single-sided mixed communication in the alternate mode in the non-ECM communication mode of the present invention.

FIG. 9 is an explanatory diagram showing a state of double-sided and single-sided mixed communication in the alternate mode in the ECM communication mode of the present invention.

FIG. 10 is an explanatory diagram showing a state of double-sided / single-sided mixed communication in the continuous mode in the non-ECM communication mode of the present invention.

FIG. 11 is an explanatory diagram showing a state of double-sided / single-sided mixed communication in the continuous mode in the ECM communication mode of the present invention.

12 is a flowchart showing communication control by a CPU 22 of FIG.

13 is a flowchart showing communication control by a CPU 22 of FIG.

FIG. 14 is a flowchart showing communication control by a CPU 22 of FIG.

15 is a flowchart showing communication control by a CPU 22 of FIG.

16 is a flowchart showing communication control by a CPU 22 of FIG.

17 is a flowchart showing communication control by a CPU 22 of FIG.

18 is a flowchart showing communication control by a CPU 22 of FIG.

19 is a flowchart showing communication control by the CPU 22 of FIG.

20 is a flowchart showing communication control by the CPU 22 of FIG.

21 is a flowchart showing communication control by a CPU 22 of FIG.

22 is a flowchart showing communication control by a CPU 22 of FIG.

23 is a flowchart showing communication control by the CPU 22 of FIG.

24 is a flowchart showing communication control by the CPU 22 of FIG.

25 is a flowchart showing communication control by the CPU 22 of FIG.

26 is a flowchart showing the overall flow of communication control by the CPU 22 of FIG.

27 is a flowchart showing the overall flow of communication control by the CPU 22 of FIG.

FIG. 28 is an explanatory diagram showing the configuration of a document image transmitted according to the present invention.

FIG. 29 is an explanatory diagram showing the configuration of a document image transmitted according to the present invention.

FIG. 30 is an explanatory diagram showing the configuration of a document image transmitted according to the present invention.

FIG. 31 is an explanatory diagram showing a configuration of a document image transmitted according to the present invention.

[Explanation of symbols]

2 NCU 4 telephones 6 hybrid circuit 8 modem 10 Calling circuit 12 adder circuit 14 reading circuit 16 Recording circuit 18 memory circuits 20 Operation part 22 CPU 24 ROM 26 bus

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5C062 AA02 AB17 AC09 AC41 AC61                       AE14 BA04                 5C075 CA03 CD05 CD21 CD25

Claims (15)

[Claims] 1. In a facsimile apparatus that performs double-sided communication for transmitting double-sided image information, the image information on the front surface or the back surface of the original document to be transmitted / received is almost all-white image information, or other effective image information. If the detection means detects valid image information on the back side of the document, the detection means transmits image information on the back side of the document, while the detection means transmits full-white image information on the back side of the document. If detected, the transmission of the image information on the back side of the document is omitted, and the receiver is notified of the presence or absence of image information on the back side of the document following the front side of the document by a post message signal transmitted in relation to the image on the front side of the document. Facsimile apparatus having control means for performing mixed communication on both sides and one side. 2. The method according to claim 1, wherein when the detecting unit detects all-white image information on the front surface of the original, the all-white image information on the front surface of the original is transmitted without omission. Facsimile machine. 3. A page number transmitted by a post message signal relating to image information on the front side and the back side of the document is ITU-T Recommendation T.264. The facsimile apparatus according to claim 1, wherein the number of increments is 30. 4. The facsimile apparatus according to claim 1, wherein sender information including a page number counting only valid image information to be transmitted and received is transmitted as a part of the valid image information. 5. The facsimile apparatus according to claim 1, wherein whether or not the double-sided / single-sided mixed communication is performed is notified by a facsimile procedure signal. 6. A method of controlling a facsimile apparatus for performing double-sided communication for transmitting double-sided image information, wherein the image information on the front surface or the back surface of the original document to be transmitted / received is almost all-white image information, or other information. A detection step of detecting whether the image is valid image information, and when the detection step detects valid image information on the back side of the document, the image information on the back side of the document is transmitted, while the detection step detects all white on the back side of the document. When image information is detected, transmission of the image information on the back side of the document is omitted, and the presence or absence of image information on the back side of the document following the front side of the document is received by a post message signal transmitted in relation to the image on the document front side. A method of controlling a facsimile apparatus, comprising: a control step of performing a two-sided / one-sided mixed communication for notifying a machine. 7. The method according to claim 6, wherein when the detecting step detects all-white image information on the front surface of the document, the all-white image information on the front surface of the document is transmitted without omission. Facsimile machine control method. 8. The page number transmitted by a post message signal relating to image information on the front side and the back side of the document is ITU-T Recommendation T.264. 7. The method of controlling a facsimile apparatus according to claim 6, wherein the number of increments is 30. 9. The method of controlling a facsimile apparatus according to claim 6, wherein sender information including a page number counting only valid image information to be transmitted and received is transmitted as a part of the valid image information. 10. The method of controlling a facsimile apparatus according to claim 6, wherein whether or not the double-sided / single-sided mixed communication is performed is notified by a facsimile procedure signal. 11. In a control program of a facsimile apparatus which performs double-sided communication for transmitting double-sided image information, the image information on the front surface or the back surface of the original document to be transmitted / received is almost all-white image information, or other information. A detection step of detecting whether the image is valid image information, and when the detection step detects valid image information on the back side of the document, the image information on the back side of the document is transmitted, while the detection step detects all white on the back side of the document. When image information is detected, transmission of the image information on the back side of the document is omitted, and the presence or absence of image information on the back side of the document following the front side of the document is received by a post message signal transmitted in relation to the image on the document front side. A control program for a facsimile machine, comprising a control step of performing a two-sided / one-sided mixed communication for notifying a machine. 12. When the detecting step detects all-white image information on the front surface of the document, the control step includes transmitting the all-white image information on the front surface of the document without omission. A control program for a facsimile apparatus according to claim 11. 13. A page number transmitted by a post message signal relating to image information on the front side and the back side of a document is ITU-T Recommendation T.264. The control program for a facsimile apparatus according to claim 11, further comprising a control step for incrementing in 30 ways. 14. The facsimile according to claim 11, further comprising a control step for transmitting, as a part of the valid image information, sender information including a page number that counts only valid image information to be transmitted and received. Device control program. 15. The control program for a facsimile apparatus according to claim 11, further comprising a control step for notifying by a facsimile procedure signal whether or not the both-sided and one-sided mixed communication is performed.