JP2002290689A - Facsimile machine, method of controlling the same, and control program for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one-side/double side mixed mode through which the images of the mixed manuscripts of one side and double side can be sent and received. SOLUTION: Under the control of CPU 22, information is notified to indicate whether rear image information corresponding to sending image information is present or not together with page numbers and information on images of rear or front by post message signals sent from a transmitter to a receiver. When the transmitter omits the transmission of rear image information corresponding to certain image information for the reason that the image information read from the rear of a manuscript is nearly all white, the transmitter notifies the receiver of information that rear image information corresponding to the front image information of a certain manuscript is not present, so that one-side/ double-side mixed image information can be sent and received.

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 duplex communication for transmitting duplex image information between a transmitter and a receiver, a control method therefor, and a control program therefor.

[0002]

2. Description of the Related Art A conventional facsimile apparatus is basically based on an operation of transmitting a single-sided information document and recording it on one side. The old ITU-T Recommendation T. 4, or T. 30 and the like, only this one-sided communication is described.

On the other hand, recently, awareness of resource saving has been increasing, and printers and copiers having a so-called double-sided recording system for recording on the front and back sides of one sheet of paper are increasing. Along with this, a standard for two-sided facsimile communication was established in February 2000 by ITU-
Recommended by T.

The new ITU-T Recommendation T. 30, or a proposal thereof, as a transmission method of the two-sided image information, two-sided alternate transmission (alternate mode) in which the image on the front side and the image on the back side are alternately transmitted for each page, or the entire image on the front side of the original is transmitted. Subsequently, double-sided continuous transmission (continuous mode) for transmitting the entire backside image is defined.

[0005]

SUMMARY OF THE INVENTION A new ITU-T Recommendation T.T. 30 or the two-sided communication in the tentative plan presupposes that the original is a two-sided original, that is, that both sides of the original always contain a significant image. ) Must always be transmitted on the back side of a one-sided document.

For this reason, when transmitting a document image in which a single-sided document and a double-sided document are mixed, if the ratio of the one-sided information included in the document information is high, the communication time becomes longer and the communication cost is wasted. There was a problem.

At present, transmission of mixed information of single-sided information and double-sided information is not recommended by the ITU-T, but can be realized by a simple protocol and can efficiently transmit a single-sided / double-sided original image. A duplex mixed mode is desired.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to efficiently transmit and receive a single-sided / double-sided original image.
It is to provide a duplex mixed mode.

[0009]

According to the present invention, there is provided a facsimile apparatus for performing duplex communication for transmitting duplex image information between a transmitter and a receiver, a control method for the facsimile apparatus, and a method for controlling the facsimile apparatus. In the control program of the facsimile apparatus, information indicating presence / absence of back side image information corresponding to the transmission image information is notified by a procedure signal transmitted from the transmitter to the receiver, and the back side image corresponding to the certain image information is transmitted by the transmitter. When information transmission is omitted, a configuration in which the transmitter transmits and receives mixed image information on one side and both sides by notifying the receiver of information indicating no back side image information corresponding to the image information by the procedure signal. It was adopted.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a hardware configuration of a facsimile apparatus employing the present invention. In FIG. 1, reference numeral 2 denotes an NCU (Network Control Unit) which connects a telephone network to a terminal of the line in order to use the telephone network for data communication and the like, controls connection of a telephone switching network, and switches to a data communication path. Or hold the loop. NCU
2 connects the telephone line 2a to the telephone 4 side (CML off) or connects the telephone line 2a to the facsimile machine side (CML on) according to control from the bus 26. In a 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 a transmission signal from the addition circuit 12 to the telephone line 2a via the NCU 2, and transmits a signal from the other party via the NCU 2 And sends it to the modem 8 via the signal line 6a.

Reference numeral 8 denotes a modulator / demodulator. 8, V.I. 21, V.I. 27ter, V.I. 29, V.I. 1
7, V.I. The modulation and the demodulation are performed on the basis of a control signal 34, and each transmission mode is designated by the control of the bus 26. The modem 8 receives the transmission signal from the bus 26,
The modulated data is output to the signal line 8a, the received signal output to the signal line 6a is input, and the demodulated data is output to the bus 26.

Reference numeral 10 denotes a calling circuit for inputting telephone number information under the control of the bus 26,
A selection signal in DTMF format is output to a.

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

Reference numeral 14 denotes a reading circuit capable of reading both-side information of a document, which comprises an optical reading element and a document conveying system, and outputs read data to a bus 26. The structure of the document transport system for reading double-sided information is arbitrary. One that reads from both sides of the document while reversing the front or back of the document, or after reading the front side, the user reverses the bundle of documents and reads the back side Such a semi-manual type may be used.

Reference numeral 16 denotes a recording circuit capable of recording double-sided information, and sequentially records information output to the bus 26 line by line. In the present embodiment, the recording circuit 16
Is composed of a recording mechanism such as a laser beam printer having a recording paper reversing mechanism (not shown).

Reference numeral 18 denotes a memory circuit, which is a RAM circuit.
(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 via bus 26.

Reference numeral 20 denotes an operation unit, which includes one-touch dial, speed dial, numeric keypad, * key, # key, start key, stop key, set key, double-sided transmission selection key, and other function keys. 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 for a user interface for monitoring an operation state of the apparatus and performing various settings. Operation unit 2
The access of 0 is performed via the bus 26.

Reference numeral 22 denotes a CPU (central processing unit) which controls the operation of the entire facsimile and executes a facsimile transmission control procedure. The control program is stored in the ROM 24. Reference numeral 26 denotes the CPU 22
And an address bus and a data bus.

In the present embodiment, information indicating the presence / absence of back image information corresponding to transmission image information can be notified by a procedure signal transmitted from the transmitter to the receiver, and the back image corresponding to certain image information can be notified. When information transmission is omitted, the procedure signal notifies the receiver of information indicating that there is no backside image information corresponding to the image information, so that single-sided and double-sided mixed image information can be transmitted and received. To

Here, an outline of a communication procedure for duplex transmission in the present embodiment will be described with reference to FIGS.

The two-sided transmission communication mode includes an alternate mode (two-sided alternate transmission mode) and a continuous mode (two-sided continuous transmission mode). The former is the surface of the first page,
In this mode, the front side and the back side of the document are alternately transmitted one by one, such as the back side, the front side of the second page, the back side. In the latter case, only the front side of the first page, the front side of the second page, and so on are transmitted in the order of pages only from the front side of the original, and then the back side of the first page, the rear side of the second page, and so on are all transmitted in the page order. This is the transmission mode. The facsimile machine can use any mode depending on its implementation.

The above alternate mode and continuous mode are based on ITU
-T Recommendation T. In the present embodiment, a double-sided / single-sided mixed mode is further defined. The duplex / simplex mixed mode is desirably used in both the alternate mode and the continuous mode. Therefore, in this embodiment, the alternate duplex / simplex mixed mode and the continuous duplex / simplex mixed mode are defined.

In this embodiment, an alternate double-sided / single-sided mixed mode,
In the continuous double-sided / single-sided mixed mode, the back side information of this page is transmitted by a post message signal (specifically, a Q signal or a PPS-Q signal) immediately after transmitting the image data of the front side of a document. It is possible to specify whether to skip (do not transmit).

And a known alternate mode, continuous mode,
Whether the alternate duplex / single-side mixed mode or the continuous duplex / single-side mixed mode of the present embodiment is used depends on the DIS (digital identification: transmitted from the image receiving station), the DTC, and the like.
Negotiation can be performed between the transmitter and the receiver using a (digital transmission command: transmitted from the image transmission station) signal and a DCS (digital command: transmitted from the image transmission station) signal.

FIG. 2 shows the D used in the present embodiment.
The format of the IS / DTC / DCS signal is shown.

As shown in FIG. 2, in the DIS / DTC signal, double-sided recording in the alternate mode is performed according to the x-th bit of the FIF (the bit number is indicated by "x" in the figure, but is actually 113). The presence or absence of the function is indicated, and the x + 1 (114th) bit of the FIF indicates the presence or absence of the double-sided recording function in the continuous mode. In the DCS signal, double-sided transmission in the alternate mode is specified by the x (113th) bit of the FIF, and double-sided transmission in the continuous mode is specified by the x + 1 (114th) bit of the FIF.

Further, the Z of the FIF of the DIS / DTC signal
The bit number (which may be an FIF configuration or an arbitrary bit that can be recommended) indicates an alternate double-sided / single-sided mixed reception mode, that is, the presence or absence of a function of receiving mixed information of double-sided information and single-sided information in the alternate mode. Further, in the DCS signal, both sides /
A single-sided mixed transmission mode, that is, whether or not there is a function of transmitting mixed information of double-sided information and single-sided information in the alternate mode.

Similarly, the Z of the FIF of the DIS / DTC signal
By the + 1st bit, continuous duplex / simplex mixed reception mode,
That is, the presence or absence of the function of receiving mixed information of both-side information and single-sided information in the continuous mode is indicated. Specify transmission of mixed information.

Since the above-mentioned x and x + 1 bits are known, after all, in order to realize transmission / reception of mixed information of both sides and one side of this embodiment, the FIFO of the DIS / DCS / DTC signal is realized.
, Only the Z and Z + 1 bits need to be added.

Next, FIG. 3 shows the structure of a post message signal (Q signal) transmitted after the image message.

FIG. 3 shows a Q signal (specifically, EOP (end of page), MPS (multipage), or EOM (end of message) signal) in normal G3 transmission, and ECM (error correction mode). PP in transmission
SQ signal (specifically, PPS-EOP or
PPS-MPS or PPS-EOM or P
3 shows a frame configuration of a post message signal such as PS-NULL.

As shown in FIG. 3, these post message signals include Flag (flag), Address (address), Control (control data), FCF (facsimile information field), PC (page counter),
BC (block counter), FC (frame counter)
Followed by Length (Pagenumer (2 octets) and Page information (currently 1
Octets), total octets), Pageumb
er (added one page at a time from P1 in the case of transmitting the two-sided document in the page order of the front side and the back side).

The following Page Information
On (page information) is for transmitting information about the transmitted page, but this configuration is slightly different from the conventional post message signal. That is, in the page information of the present embodiment, whether the front side (set to 0) or the back side (set to 1) is designated by bit 0 (same as before),
The user can specify whether the back side information is not transmitted (set to 1) or the back side information is transmitted (set to 0) (see FIG. 3).
Lower table).

Further, Page Information
n, FCS (frame check sequence), F
lag (flag) is transmitted.

The above-mentioned Page Information
Since bit1 of ion expresses the presence / absence of transmission of the corresponding back side, it is naturally assumed that the signal is effectively interpreted on the signal receiving side only when the front side is designated by bit0.

After all, in the post message signal,
In order to realize transmission / reception of mixed information of both sides and one side of the present embodiment, it is necessary to use a Page in the FIF of the Q and PPS-Q signals.
It is only necessary to add bit1 as a new bit to Information.

In addition, Length, Pageumbe
r and Page information do not exist in the conventional one-sided protocol, but are octets newly added for two-sided transmission. Here, the post message signal used in the normal G3 communication includes P
C, BC, FC are not included and P used for ECM communication
Used only for PS-Q signals.

Next, FIGS. 4 to 7 show a known alternate mode (non-ECM) and alternate mode (E) in the normal G3 mode.
CM), continuous mode (non-ECM), continuous mode (EC
M) shows the state of communication.

As shown in FIGS. 4 to 7, the x and x + 1 bits of the DIS signal indicate the duplex transmission function (alternate or continuous) of the receiver, and the x and x + 1 bits of the DCS signal indicate the transmitter. Declares a double-sided transmission mode to be executed. In the continuous mode of FIGS. 6 and 7, it is declared that the transmission in the continuous mode is performed by setting the x + 1 bit of the DCS signal to 1.

As shown in FIGS. 4 and 6, the MPS signal is used as a post message signal in the normal mode, and the PPS-signal is used as the post message signal in the ECM as shown in FIGS. 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, FIG.
The MPS signal indicated by the symbol “MPS (PN = 1, 0 (fr
ont side))).
Page number 1 (PN = 1), surface (0 (front s)
ide)) is transmitted (FIG. 4).
The following description of the MPS or PPS-MPS signal is the same as above.)

That is, in the alternate mode shown in FIGS. 4 and 5, the table (0) of the first sheet (PN = 1) and the first sheet (PN =
2) Back (1), 2nd (PN = 3) table (0), 2nd (PN = 4) back (1), 3rd (PN = 5) table (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 communications shown in FIGS. 4 to 7, both the transmitter and the receiver use only a known double-sided communication protocol, and the Z / Z + 1 bits of the DIS / DCS / DTC signal are not used. , Post message signal P
Also, bit1 of age information is not used.

Next, FIGS. 8 to 11 show alternate double / single-side mixed mode (non-ECM), alternate double / single-side mixed mode (ECM), continuous double / single-side mixed mode (non-ECM) of this embodiment.
M), and the state of communication in the continuous duplex / simplex mixed mode (ECM).

The communication shown in FIGS. 8 to 11 is substantially similar to that shown in FIGS. 4 to 7, and the description of the same parts is omitted here. The difference from FIGS.
The method of assigning the page number of “rmation” and the format of the procedure signal exchanged.

That is, in each of the communications shown in FIGS. 8 to 11, three pages of document information are transmitted.
Page: double-sided information, page 2: single-sided information, page 3: double-sided information.

The called side (receiver in this embodiment) shown in FIGS. 8 to 11 declares that all of these functions can be used by setting all the X, X + 1, Z, and Z + 1 bits of the DIS signal to 1. ing. The declaration of the ECM of the DIS signal is the same as that shown in FIGS.
It is set to 0 in FIG. 10) and set to 1 in the ECM (FIGS. 9 and 11).

The response of the calling side DCS signal is as follows: bit Z = 1, bit 27 (ECM) = 0 (FIG. 8), bit Z = 1, bit 27 (ECM) = 1 (FIG. 9), bit 27 Z + 1 = 1, bit 27 (ECM) = 0
(FIG. 10), bit Z + 1 = 1, bit 27 (ECM)
= 1 (FIG. 11).

8 to 11, in the configuration of the document information as described above (without the third and second back surfaces), the page number (PN) assigned to each surface and the Pag
Bit 0 and bit 1 of e information are (the values of these three data are separated by “,”). First page table 1,0,0 First page back 2,1,0 Second page table 3 , 0, 1 (indicating no corresponding back side) (Back of second page: not transmitted) Third page table 5,0,0 Third page back 6,1,0

The alternate duplex / single-side mixed mode (non-ECM, ECM) shown in FIGS.
The difference between single-sided mixed mode (non-ECM, ECM)
As in the case of FIG. 7, in FIGS. 8 and 9, the image information on the front and back sides is transmitted alternately (except for the back surface that does not exist). In FIGS. 10 and 11, all the image information on the front side is transmitted first. Subsequently, all the image information on the back surface (except for the non-existing back surface) is transmitted.

As shown in FIG. 8 to FIG. 11, the page number (PN) and the page format
By transmitting bit 0 and bit 1 of “on”, the receiving side can determine whether there is back side information or not by checking P of front side information.
Monitor bit 1 of age information,
If this is 0, the corresponding back side information exists and 1
Indicates that the corresponding back side information does not exist.

Next, FIGS. 12 to 18 show communication controls to be executed by the CPU 22 in order to perform the two-sided communication and the two-sided / one-sided mixed communication processing as described above. 12 to 18 are stored in the ROM 24 as a program of the CPU 22. FIGS. 12 to 18 are flow charts showing the flow of processing for realizing the above-described communication control. It is assumed that the parts having the same numbers in FIGS. 12 to 18 are continuous at respective positions.

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

In step S2, the memory circuit 18 is initialized via the bus 26, and in step S4, the display unit of the operation unit 20 is initialized (cleared) via the bus 26.

In step S6, the NC
The CML of U2 is turned off, and the line 2a is connected to the telephone 4 side.

In step S8, the information of the operation unit 20 is input via the bus 26, and it is determined whether or not the transmission of the two-sided document is selected. Proceeding to S10, if transmission of the two-sided document is not selected, the process proceeds to step S80 (FIG. 17).

In step S10, a physical page counter k and a plane flag are initialized. Here, the physical page counter counts physical pages (corresponding to the number of documents). The surface flag identifies the front and back of the document, and stores values such as 0 and 1 corresponding to the front and back. These counters and flags are assigned to predetermined areas of the memory circuit 18.

In step S12, 1 is set to a physical page counter k. Subsequently, in step S14, the information of the physical page counter k and the surface flag is read,
The data is encoded and stored in the memory circuit 18.

In step S16, it is determined whether or not the surface flag is back, and if the surface flag is back, step S20 is performed.
If not, the process proceeds to step S18. In step S18, the back is set on the surface.

In step S20 of FIG. 13 subsequent to step S18, the reading circuit 14 reads one image of the document, and determines whether the read surface is (almost) completely white. This can be performed, for example, by 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). When step S20 is affirmed, the process proceeds to step S22, and when denied, the process proceeds to step S24.

In step S22, information indicating that the surface is all white information is stored in a predetermined storage area for storing the state of the surface (whether all white or not) corresponding to the physical page counter k and the surface flag. Let it.

In step S24, it is determined whether there is a next page to be read by the reading circuit 14. If there is a next page, the process proceeds to step S26. If there is no next page, the process proceeds to step S30.

If there is a next page in step S24, information indicating a table (for example, 0) is set in the plane flag in step S26, and in step S28, the value of the physical page counter k is incremented by one and step S1 is executed.
Return to 4.

When all originals have been read, step S30
, The CML of the NCU 2 is turned on via the bus 26, and the line 2a is connected to the facsimile apparatus (hybrid circuit 6).

In step S32, the calling circuit 10 is controlled via the bus 26 to call a designated destination. It is assumed that the destination is specified by a ten-key or one-touch key of the operation unit 20.

In step S34, a pre-facsimile procedure is executed. In step S36, it is determined whether or not there is all-white information on the back surface. This determination may be made by examining the flags set in step S22 for each surface in relation to the physical page counter k and the surface flag corresponding to each document surface. If there is all white information on the back side (even one side), the process proceeds to step S62,
If there is no all-white information on the back side, the process proceeds to step S38.

In step S38, it is determined whether or not transmission in the continuous mode has been selected by a predetermined operation on the operation unit 20, and if transmission in the continuous mode has been selected, the process proceeds to step S40 (FIG. 14). If the transmission in the continuous mode is not selected, the process proceeds to step S48 (same).

In the case of the transmission in the continuous mode, X + of the FIF of the DIS signal of the receiver is set in step S40 of FIG.
It is determined whether or not one bit is one. Receiver DIS
When the X + 1 bit of the FIF of the signal is 1, that is,
If the receiver supports the continuous mode, the process proceeds to step S42. If the receiver does not support the continuous mode, the process proceeds to step S48.

In step S42, the remaining pre-facsimile procedure is executed. Here, since the receiver supports the continuous mode, the DC is required to support the continuous mode.
The X + 1 bit of the SIF signal FIF is set to 1.

In step S44, transmission is performed in the duplex mode in the continuous mode shown in FIGS. In step S44, whether or not to perform the ECM communication is determined by the F of the DIS signal.
The selection is made by judging bit 27 of the IF. In step S46, a post-facsimile procedure is executed, and the process returns to step S8 in FIG.

On the other hand, if the receiver does not support the continuous mode, the DIS of the receiver is determined in step S48.
It is determined whether or not 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 alternating mode, the process proceeds to step S50, and if the receiver does not support the alternating mode, step S56 ( Proceed to FIG.

If the receiver supports the alternate mode, the remaining pre-facsimile procedure is executed in step S50. Here, the X bit of the FIF of the DCS signal is transmitted as 1.

In step S52, transmission in the duplex communication mode in the alternate mode shown in FIG. 4 or 5 is executed.
In step S52, whether or not to perform the ECM communication is selected by determining the bit 27 of the FIF of the DIS signal. Thereafter, the post-procedure is executed in step S54 in FIG. 15, and the process returns to step S8 in FIG.

On the other hand, if the receiver does not support the alternate mode, the remaining pre-facsimile procedure is executed in step S56 in FIG. Here, the X, X + 1, Z, and Z + 1 bits of the FIF of the DCS signal are all transmitted as 0.

Then, in step S58, information with valid information is transmitted as one-sided transmission, a post-procedure is executed in step S60, and the process returns to step S8 in FIG.

On the other hand, if there is all-white information on the back side (even on one side) in step S36, it is determined in step S62 whether or not transmission in the continuous mode is selected on the operation unit 20. When the continuous mode transmission is selected, the process proceeds to step S64 (FIG. 16), and when the continuous mode transmission is not selected, the process proceeds to step S66 (FIG. 1).
Proceed to 6).

In step S64 in FIG. 16, it is determined whether or not the Z + 1 bit of the FIF of the DIS signal received from the receiver is 1. F of the DIS signal received from the receiver
If the Z + 1 bit of the IF is 1, that is, if the receiver supports the continuous duplex / single-sided mixed mode, the process proceeds to step S68; otherwise, the process proceeds to step S66.

If the receiver does not support the continuous duplex / simplex mixed mode, the Z bit of the FIF of the DIS signal received from the receiver in step S66 is set to 1
Is determined. If the Z bit of the FIF of the DIS signal is 1, that is, if the receiver supports the alternate duplex / simplex mode, the process proceeds to step S74. If the receiver does not support the same mode, the process proceeds to step S40 (FIG. 1).
Proceeding to 4), two-sided transmission is performed in the above-described alternate or continuous mode according to the bits X and X + 1 of the DIS signal.

If the receiver supports the continuous duplex / simplex duplex mode, the remaining pre-facsimile procedure is executed in step S68. Here, the Z + 1 bit of the FIF of the DCS signal is set to 1, and the use of the continuous duplex / simplex mixed mode is declared. Then, step S70
Performs transmission in the duplex / single-sided mixed communication mode in the continuous mode shown in FIGS. ECM in step S70
Whether communication is performed or not is determined by bit 27 of the FIF of the DIS signal.
Is selected by determining. Then, step S7
In step 2, the post-procedure is executed, and the process returns to step S8 in FIG.

On the other hand, in step S66, the Z bit of the FIF of the DIS signal is 1, that is, the receiver
Step S if single-sided mixed mode is supported
At 74, the remaining pre-facsimile procedure is performed. Here, the Z bit of the FIF of the DCS signal is set to 1, and the use of the alternate duplex / simplex mixed mode is declared.

Then, in step S76, FIGS.
The transmission in the duplex / single-side mixed communication mode in the alternate mode shown in FIG. In step S76, whether or not to perform the ECM communication is selected by determining the bit 27 of the FIF of the DIS signal. Thereafter, in step S78, a post-procedure is executed, and the process returns to step S8 in FIG.

On the other hand, if transmission of a two-sided document is not selected in step S8, the process proceeds to step S8 in FIG.
At 0, it is determined whether facsimile reception has been selected. Arrival of a call signal from the line or operation unit 20
If the conditions such as the manual reception operation and the arrival of the specified time of the specified time polling are satisfied and the reception is selected, the process proceeds to step S84. Step S when not receiving
Proceeding to step 82, other processing (such as original copy processing) is executed.

When performing the receiving process, step S84
, The CML of the NCU 2 is turned on via the bus 26, and the line 2a is connected to the facsimile machine side.

In step S86, a pre-facsimile procedure is executed. Here, X, X + of the FIF of the DIS signal
The bits 1, 1, and Z + 1 are set to 1. That is, the known alternate mode, continuous mode, and alternate double-sided /
Declares support for both single-sided mixed mode and continuous double-sided / single-sided mixed mode.

In step S88, it is determined whether or not the X bit of the FIF of the DCS signal received from the transmitting side is 1. The X bit of the FIF of the DCS signal is 1, ie,
If the transmitter has declared double-sided transmission in the alternate mode, the process proceeds to step S90. If the X bit of the FIF of the DCS signal is not 1, the process proceeds to step S94.

In step S90, reception in the duplex communication mode in the alternate mode shown in FIGS. 4 and 5 is executed. In step S90, whether or not to perform the ECM communication is selected by determining the bit 27 of the FIF of the DIS signal. Then, a post-facsimile procedure is executed in step S92,
It returns to step S8 of FIG.

On the other hand, in step S94, the DCS
It is determined whether or not the X + 1 bit of the FIF of the signal is 1. If the X + 1 bit of the DCS signal FIF is 1, that is, if the transmitter has declared double-sided transmission in the continuous mode, the process proceeds to step S96. If the X + 1 bit of the DCS signal FIF is not 1, the process proceeds to step S100 (FIG. Proceed to 18).

In step S96, reception is performed in the duplex mode in the continuous mode shown in FIGS. In step S96, whether or not to perform the ECM communication is selected by determining the bit 27 of the FIF of the DIS signal. Then, the post-facsimile procedure is executed in step S98,
It returns to step S8 of FIG.

In step S100 in FIG. 18, it is determined whether or not the Z bit of the FIF of the DCS signal received from the transmitter is 1. If the Z bit of the DCS signal FIF is 1,
That is, if the transmitter has declared the alternate duplex / simplex mixed mode, the process proceeds to step S102, and if the Z bit of the FIF of the DCS signal is not 1, the process proceeds to step S106.
Proceed to.

In step S102, reception in the duplex / single-side mixed communication mode in the alternate mode shown in FIGS. 8 and 9 is executed. In step S102, whether or not to perform the ECM communication is selected by determining the bit 27 of the FIF of the DIS signal. Then, a post-facsimile procedure is executed in step S104, and the process returns to step S8 in FIG.

In step S106, it is further determined whether or not the Z + 1 bit of the FIF of the DCS signal is 1.
If the Z + 1 bit of the DCS signal FIF is 1, that is, if the transmitter declares the continuous duplex / simplex mixed mode, the process proceeds to step S108, where the DCS signal FIF Z +
If one bit is not 1, the process proceeds to step S112.

In step S108, reception in the duplex / single-side mixed communication mode in the continuous mode shown in FIGS. 10 and 11 is executed. In step S108, whether to perform the ECM communication is selected by determining the bit 27 of the FIF of the DIS signal. Then, a post-facsimile procedure is executed in step S110, and the process returns to step S8 in FIG.

On the other hand, if step S106 is denied, since the transmitter has designated the old one-sided mode,
In step S112, one-sided information is received. In step S112, whether or not to perform the ECM communication is selected by determining the bit 27 of the FIF of the DIS signal. Then, in step S114, a post-facsimile procedure is executed, and the process returns to step S8 in FIG.

As described above, according to the present embodiment,
Both sides transmission and reception (non-EC
M, and ECM), and
Single-sided mixed communication mode (non-ECM and ECM), and continuous double-sided / single-sided mixed communication mode (non-ECM and ECM)
CM) can be used to transmit and receive double-sided originals.

According to the alternate and continuous duplex / single-side mixed communication mode of this embodiment, a phase for transmitting image information of a back side (for example, an all-white back side) that does not need to be transmitted (inter-page procedure and image message transmission phase). , So that even when transmitting a document image in which a single-sided document is included in a two-sided document, a single-sided / double-sided document image can be transmitted at high speed and at low cost without reducing communication efficiency. can do.

Further, according to the present embodiment, if the partner machine does not support the alternate and continuous duplex / single-side mixed communication mode, the known duplex machine mode in the alternate and continuous mode, or if the partner machine does not support these modes. When not supported, since one-sided communication is performed, there is no possibility that communication compatibility is lost.

Also, in this embodiment, since the all-white back side is automatically determined and duplex communication is performed using the alternate or continuous duplex / simplex duplex communication mode,
Even in the case of a document having a configuration in which a single-sided document is included in a double-sided document, the user does not need to perform any troublesome operation, and simply loads the bundle of documents into the reading circuit 14 and performs the transmission operation.

Although the configuration of the facsimile machine has been described above, it goes without saying that the present invention can be applied not only to the facsimile machine but also to other types of facsimile machines. For example, according to the present invention, a general-purpose terminal such as a personal computer is externally / internally provided with a fax modem or the like,
The present invention can also be implemented in a configuration in which facsimile communication is performed by software control. In this case, the control program of the present invention is stored and supplied not only in the above-described ROM 24 but also in any computer-readable storage medium such as a hard disk, a floppy (registered trademark) disk, an optical disk, a magneto-optical disk, and a memory card. Can be. Further, the present invention can of course be implemented in a so-called digital multifunction peripheral in which a facsimile communication interface or a network interface is mounted on the image forming apparatus.

[0103]

As is apparent from the above description, according to the present invention, a facsimile apparatus for performing duplex communication for communicating duplex image information between a transmitter and a receiver, a method for controlling a facsimile apparatus, and a facsimile apparatus. In the control program, information indicating presence / absence of backside image information corresponding to transmission image information is notified by a procedure signal transmitted from the transmitter to the receiver, and the transmitter transmits backside image information corresponding to certain image information. In the case of omitting, a configuration is adopted in which the transmitter sends and receives mixed image information on one side and both sides by notifying the receiver of information indicating that there is no backside image information corresponding to the image information from the transmitter to the receiver using the procedure signal. Therefore, the transmission of image information on the back side that does not need to be transmitted including the procedure between pages (for example, almost all white) can be omitted, and the communication efficiency is reduced. Ku, it is possible to transmit a document image of the simplex / duplex mixed at high speed and low cost, there is excellent effect that.

[Brief description of the drawings]

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

FIG. 2 DIS / DTC used in double-sided transmission of the present invention
FIG. 3 is a table showing FIFs of DCS signals.

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

FIG. 4 is an explanatory diagram showing a state of two-sided communication in an alternate mode in a non-ECM communication mode.

FIG. 5 is an explanatory diagram showing a state of two-sided communication in an alternate mode in the ECM communication mode.

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

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

FIG. 8 shows the alternate duplex / single-side mixed reception mode (non-E
FIG. 3 is an explanatory diagram showing a state of two-sided communication in (CM).

FIG. 9 shows an alternate duplex / single-side mixed reception mode (EC
FIG. 4 is an explanatory diagram showing a state of two-sided communication in M).

FIG. 10 is an explanatory diagram showing a state of two-sided communication in the continuous two-sided / one-sided mixed reception mode (non-ECM) of the present invention.

FIG. 11 shows a continuous duplex / single-side mixed reception mode (E
FIG. 3 is an explanatory diagram showing a state of two-sided communication in (CM).

FIG. 12 is a flowchart illustrating communication control of a CPU 22 of FIG. 1;

FIG. 13 is a flowchart showing communication control by a CPU 22 of FIG. 1;

FIG. 14 is a flowchart illustrating communication control by a CPU 22 of FIG. 1;

FIG. 15 is a flowchart illustrating communication control of a CPU 22 of FIG. 1;

FIG. 16 is a flowchart illustrating communication control by a CPU 22 of FIG. 1;

FIG. 17 is a flowchart illustrating communication control by a CPU 22 of FIG. 1;

FIG. 18 is a flowchart illustrating communication control of a CPU 22 of FIG. 1;

[Explanation of symbols]

 2 NCU 4 Telephone 6 Hybrid circuit 8 Modulator / demodulator 10 Calling circuit 12 Addition circuit 14 Reading circuit 16 Recording circuit 18 Memory circuit 20 Operation unit 22 CPU 24 ROM 26 Bus

Claims (18)

[Claims] 1. A facsimile apparatus for performing duplex communication in which duplex image information is communicated between a transmitter and a receiver, wherein a procedure signal transmitted from the transmitter to the receiver determines whether or not there is reverse image information corresponding to the transmitted image information. Means for notifying the information to be indicated, and when the transmitter omits transmission of backside image information corresponding to certain image information, the procedure signal indicates from the transmitter to the receiver that there is no backside image information corresponding to the image information. A facsimile apparatus having control means for transmitting and receiving mixed image information of one side and both sides by notifying the information to be indicated. 2. A procedure signal transmitted from a transmitter to a receiver together with image information during the two-sided communication is a Q signal or PPS as a post message signal for transmitting page information.
The facsimile apparatus according to claim 1, wherein the facsimile apparatus is a -Q signal. 3. The image processing apparatus according to claim 1, wherein the transmitter has means for reading image information from both sides of the document, and when the image information read from the back of the document is substantially all white, transmitting the image information on the back using the procedure signal. 2. The facsimile apparatus according to claim 1, wherein the facsimile apparatus is omitted. 4. A means for notifying the transmitter of the presence / absence of a function of receiving single-sided and double-sided mixed image information to the transmitter, and transmitting the single-sided and double-sided mixed image information from the transmitter to the receiver. 2. The facsimile apparatus according to claim 1, further comprising: 5. The receiver notifies the transmitter of the presence / absence of a function of receiving single-sided and double-sided mixed image information by a DIS signal, while the transmitter notifies the receiver of single-sided and double-sided mixed image information. 5. The facsimile apparatus according to claim 4, wherein transmission of the facsimile is designated by a DCS signal. 6. A means for notifying a transmitter of a presence or absence of a function of receiving mixed image information of one side and both sides in an alternate mode for alternately receiving an image on the front side and an image on the back side of the document from the receiver to the transmitter. Means for notifying the presence or absence of a single-sided and double-sided mixed image information receiving function in a continuous mode in which the entire image on the front side of the document is transmitted from the apparatus to the transmitter, and subsequently the entire image on the back side is received; From the receiver to the receiver, a means for designating the transmission of mixed image information of one side and both sides in the alternate mode of transmitting the image of the original document and the image of the back side alternately, from the receiver to the transmitter, Means for designating transmission of single-sided and double-sided mixed image information in a continuous mode in which the whole image on the front side of the document is transmitted, and then the whole image on the back side is transmitted. Facsimile machine described . 7. A method of controlling a facsimile apparatus for performing duplex communication in which duplex image information is communicated between a transmitter and a receiver, wherein the reverse image information corresponding to the transmitted image information by a procedure signal transmitted from the transmitter to the receiver. Notifying the information indicating presence / absence of the image, and transmitting the back side image information corresponding to the certain image information when the transmitter omits the back side image corresponding to the image information from the transmitter to the receiver according to the procedure signal. A control step of transmitting and receiving mixed image information of one side and both sides by notifying information indicating no information, and a control method of the facsimile apparatus. 8. A procedure signal transmitted from a transmitter to a receiver together with image information during the two-sided communication is a Q signal or PPS as a post message signal for transmitting page information.
The method of controlling a facsimile apparatus according to claim 7, wherein the signal is a -Q signal. 9. The image processing apparatus according to claim 7, wherein when the image information read from the back side of the document is almost completely white, the transmitter uses the procedure signal to omit the transmission of the image information on the back side. A method for controlling a facsimile apparatus according to the above. 10. A step of notifying a transmitter of the presence or absence of a function of receiving single-sided and double-sided mixed image information from the receiver, and transmitting the single-sided and double-sided mixed image information from the transmitter to the receiver. The method of controlling a facsimile apparatus according to claim 7, further comprising the step of: 11. The receiver notifies the transmitter of the presence / absence of a function of receiving single-sided and double-sided mixed image information by a DIS signal, while the transmitter notifies the receiver of single-sided and double-sided mixed image information. The method of controlling a facsimile apparatus according to claim 10, wherein the transmission of the fax is designated by a DCS signal. 12. A step of notifying a transmitter from a receiver of the presence / absence of a function for receiving mixed image information of single-sided and double-sided images in an alternate mode for alternately receiving an image on the front side and an image on the back side of the original. Transmitting a full image on the front side of the document to the transmitter, and subsequently notifying the presence or absence of a function of receiving mixed image information on one side and both sides in a continuous mode for receiving the entire image on the back side; From the receiver, to the receiver, the image of the front side of the document, the process of designating the transmission of mixed image information of one side and both sides in the alternate mode of transmitting the image of the back side alternately, from the receiver to the transmitter, A step of designating transmission of single-sided and double-sided mixed image information in a continuous mode in which the entire image on the front side of the document is transmitted, and then the entire image on the back side is transmitted. Facsimile machine described Control method. 13. A control program for a facsimile apparatus for performing duplex communication in which duplex image information is communicated between a transmitter and a receiver, the reverse image information corresponding to the transmitted image information by a procedure signal transmitted from the transmitter to the receiver. Notifying the information indicating the presence / absence of the back image, and transmitting the back image information corresponding to the certain image information when the transmitter is omitted. A control step of transmitting and receiving mixed image information on one side and both sides by notifying information indicating no information, and a control program for the facsimile apparatus. 14. A procedure signal transmitted from a transmitter to a receiver together with image information during the two-sided communication is a Q signal or a PP as a post message signal for transmitting page information.
14. The control program for a facsimile apparatus according to claim 13, wherein the control program is an SQ signal. 15. The apparatus according to claim 13, wherein, when the image information read from the back side of the document is substantially all white, the transmitter omits transmission of the image information on the back side using the procedure signal. A control program for the facsimile apparatus described in the above. 16. A process in which a receiver notifies a transmitter of the presence / absence of a function of receiving single-sided and double-sided mixed image information, and a step of transmitting single-sided and double-sided mixed image information from the transmitter to the receiver. 14. The control program for a facsimile apparatus according to claim 13, further comprising the step of: 17. The receiver notifies the transmitter of the presence / absence of a function of receiving single-sided and double-sided mixed image information by a DIS signal, while the transmitter notifies the receiver of single-sided and double-sided mixed image information. 17. The control program for a facsimile apparatus according to claim 16, wherein the transmission of the data is designated by a DCS signal. 18. A process in which a receiver notifies a transmitter of the presence / absence of a function of receiving mixed image information of single-sided and double-sided images in an alternate mode for alternately receiving an image on the front side and an image on the back side of the original. Transmitting a full image on the front side of the document to the transmitter, and subsequently notifying the presence or absence of a function of receiving mixed image information on one side and both sides in a continuous mode for receiving the entire image on the back side; From the receiver, to the receiver, the image of the front side of the document, the process of designating the transmission of mixed image information of one side and both sides in the alternate mode of transmitting the image of the back side alternately, from the receiver to the transmitter, Transmitting a full image of the front side of the document, and subsequently transmitting mixed image information of one side and both sides in a continuous mode in which the entire back side image is transmitted. Facsimile equipment described Control program.