JP2002314823A - Image communication device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image communication device which is capable of surely sending mixed image information of color image information and monochrome image information without lengthening a communication time. SOLUTION: A receiver notifies a transmitter by post message signals that it has a function of receiving the mixture of color image information and monochrome image information even if color image information or monochrome image information is changed by the page, and then the transmitter notifies the receiver whether it is color image information or monochrome image information after it is ascertained that the receiver has a function of receiving the mixture of color image information and monochrome information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a facsimile apparatus, and more particularly, to an image communication apparatus such as a facsimile apparatus capable of performing color facsimile communication and an image communication method.

[0002]

2. Description of the Related Art A conventional facsimile apparatus is an ITU-T.
Designed based on recommendations.

In this recommendation, JP from receiver to transmitter is
The presence / absence of the EG reception function and the presence / absence of the full-color reception function are notified, while the transmitter notifies the receiver of the presence / absence of JPEG transmission and the presence / absence of full-color transmission.
Here, when full-color transmission is designated by JPEG encoding, color transmission is performed.

[0004]

In a facsimile apparatus capable of color communication, when color information and monochrome information are mixedly transmitted in one communication, the mode is changed in the middle of a page, and color transmission is changed to monochrome transmission. It is conceivable to make a specification to change to monochrome transmission or to specify to change from monochrome transmission to color transmission.

However, once the receiver starts receiving the color information, the receiver considers that the receiver will continue to receive the color information until this one communication is completed. When the facsimile apparatus transmits color / monochrome mixed information, a communication error occurs.

[0006] Further, when transmitting monochrome information, it is very rare to change the resolution or change the size of the transmission original during the communication, and these changes can be made even if the protocol is executed based on phase B. There is no problem such as an increase in communication time. However, mixed transmission of color information and monochrome information certainly occurs, and if the protocol in phase B is executed every time the switching is performed, there is a problem that the communication time becomes longer.

The above problem is a problem that occurs in other image communication devices such as a personal computer having an image communication function.

The present invention provides an image communication apparatus capable of reliably transmitting mixed information of color and monochrome, and transmitting mixed information of color and monochrome without increasing the communication time. An object is to provide an image communication method and a storage medium.

[0009]

According to the present invention, color or monochrome, which is notified from a receiver to a transmitter of color information or monochrome information by a post message signal, is changed in page units. However, after confirming that there is a function to receive the color / monochrome mixed information, the color / monochrome mixed original information for notifying whether the information is color information or monochrome information is transmitted by a post message signal.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 shows a facsimile apparatus F according to a first embodiment of the present invention.
It is a block diagram which shows S1.

An NCU (network control unit) 2 connects to a terminal of the line in order to use the telephone network for data communication and the like.
It controls connection of the telephone exchange network, switches to a data communication path, and holds a loop. The NCU 2 connects the telephone line 2a to the telephone (CML off) or connects the telephone line 2a to the facsimile apparatus (CML on) under the control of the bus 26. In a normal state, the telephone line 2a is connected to the telephone 4 side.

The hybrid circuit 6 separates the transmission system signal and the reception system signal, sends the transmission signal from the addition circuit 12 to the telephone line 2a via the NCU 2, and receives the signal from the other party via the NCU 2. , To the modem 8 via the signal line 6a.

The modulator / demodulator 8 is based on ITU-T Recommendation V. 8,
V. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I.
This is a modulator / demodulator that performs modulation and demodulation based on the signal 34, and each transmission mode is designated by control of the bus 26. Further, 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.

The calling circuit 10 inputs telephone number information in response to a signal from the bus 26, and sends DTMF to the signal line 10a.
Is output.

The adder circuit 12 receives the information of the signal line 8a and the information of the signal line 10a, and adds the result of the addition to the signal line 12a.
output to a.

A reading circuit 14 capable of reading color information
Outputs read data to the bus 26.

The recording circuit 16 capable of recording color information includes:
Information output to the bus 26 is sequentially recorded line by line.

The memory circuit 18 has a work memory (R
AM), and further stores raw information or encoded information of the read data, and receives received information or
The decrypted information and the like are used for storage via the bus 26.

The operation unit 20 includes one-touch dial, speed dial, numeric keypad, * key, # key, start key,
Stop key, set key, registration key to memory 18,
It has other function keys, and the pressed key information is output to the bus 26. The operation unit 20 is provided with a display unit for inputting and outputting information output to the bus 26.

A CPU (central processing unit) 22 controls the entire facsimile and executes a facsimile transmission control procedure. The control program is stored in a ROM 24.

The control program stored in the ROM 24 includes, in a facsimile apparatus capable of communicating color information, means for notifying the transmitter of the presence or absence of the JPEG receiving function from the receiver to the transmitter, and determining whether or not the receiver has the full color receiving function. If the color or monochrome information is notified by the post message signal to the transmitter and whether the information is color information or monochrome information, the color / monochrome mixed information is received even if the page unit is changed. Means for notifying the transmitter of the presence / absence of the function to perform transmission, means for designating JPEG transmission from the transmitter to the receiver, means for designating full-color transmission from the transmitter to the receiver, and a post message signal. Transmits color / monochrome mixed original information, which indicates whether the information is color information or monochrome information. It is an example of a means for realizing a means for specifying the al receiver.

The control program stored in the ROM 24 includes a color message indicating whether the information is color information or monochrome information by a post message signal.
When transmission of monochrome mixed document information is designated, the post message signal includes information indicating whether the transmission information of the next document is color information or monochrome information.

Here, in a facsimile apparatus capable of communicating color information, color or monochrome, which is notified of color information or monochrome information by a post message signal from a receiver to a transmitter, is changed in page units. If there is a function to receive the color / monochrome mixed information, the phase B from the transmitter to the receiver
It is possible to receive even if a change is made in color or monochrome pages by specifying whether the information is color information or monochrome information.

FIG. 2 is a diagram showing a specific example of a protocol at the time of color transmission in the above embodiment.

Here, F of the DIS, DTC and DCS signals
The 68 and 69 bits of the IF are information determined by the current ITU-T recommendation, and here, an X bit is newly provided.

The 68 bits of the FIF of the DIS and DTC signals are bits indicating the presence or absence of the reception function of JPEG encoding, and the 68 bits of the FIF of the DCS signal are bits indicating designation of transmission of JPEG encoding.

The 69 bits of the FIF of the DIS and DTC signals are bits indicating the presence or absence of a full color mode reception function, and the 69 bits of the FIF of the DCS signal are bits indicating designation of transmission in the full color mode.

The X bit of the FIF of the DIS and DTC signals indicates whether the color or monochrome in which the post message signal indicates color information or monochrome information is changed even if the color or monochrome is changed in page units. This bit indicates the presence or absence of the mixed information reception function.
The X bit of the S signal FIF is a bit for designating transmission of mixed color / monochrome original information in which the post message signal indicates whether the information is color information or monochrome information.

The X + 1 bit of the FIF of the DIS and DTC signals is a don't care and the FIS of the DCS signal is
The X + 1 bit of F is a bit for specifying color information for the first page (valid when the X bit of the FIF of the DCS signal is 1).

FIGS. 4 to 11 are flowcharts showing the operation of the above embodiment.

In S2, the memory 18 is connected via the bus 26.
In step S4, the display unit of the operation unit is cleared via the bus 26. In step S6, the CML of the NCU 2 is turned off via the bus 26.

In S8, it is determined whether or not facsimile reception has been selected. If facsimile reception has been selected, the process proceeds to step S14, and if facsimile reception has not been selected, the process proceeds to step S10.

In S10, information of the operation unit is input via the bus 26, and it is determined whether or not transmission is selected. If transmission is selected, the process proceeds to step S44. If transmission is not selected, Proceed to step S12 to execute other processing.

In S14, the NCU 2
Is turned on, and in S16, the pre-procedure is executed. Here, 68 bits, 69 bits, X
All bits are set to 1.

In S18, it is determined whether both the 68 bits and the 69 bits of the FIF of the DCS signal are 1; if all are 1, the process proceeds to step S22; if at least one is 0, the process proceeds to step S20. move on.

At S20, monochrome image information is received and recorded.

In S22, it is determined whether or not the X bit of the FIF of the DCS signal is 1, and the X of the FIF of the DCS signal is determined.
If the bit is 1, the process proceeds to step S24. If the X bit of the FIF of the DCS signal is not 1, the process proceeds to step S42.
To receive and record the color image signal.

In S24, the X + 1 of the FIF of the DCS signal is
Judge whether the bit is 1 or not, and
If the X + 1 bit of is 1, the process proceeds to step S26.
Receives and records color image signals and performs DCS signal IF
If the X + 1 bit is not 1, the process proceeds to step S38, where the monochrome image signal is received and recorded.

In S28, it is determined whether the reception and recording of one page have been completed. If the reception and recording of one page have been completed, the flow advances to step S30 to execute the intermediate procedure, and
If the page has not been received or recorded, step S
Proceed to 26.

In S32, it is determined whether or not there is a next document. If there is a next document, the process proceeds to step S36. If there is no next document, the process proceeds to step S34 to execute a post-procedure.

In S36, the Q signal or PPS-Q
It is determined whether or not the Y bit of the FIF of the signal is 1;
If so, the process proceeds to step S26. If not 1, the process proceeds to step S38.

In step S40, it is determined whether the reception and recording of one page have been completed. If the reception and recording of one page have been completed, the process proceeds to step S30, where the reception and recording of one page have been completed. If not, the process proceeds to step S38.

In step S44, 1 is set in the page counter, and in step S46, the image signal is read, encoded, and stored in the memory corresponding to the page counter. here,
In accordance with the number of pages of the page counter, whether it is color or monochrome is stored.

In S48, it is determined whether or not there is a next page. If there is a next page, the process proceeds to step S50, and the value of the page counter is incremented by 1. If there is no next page, the process proceeds to step S52.

In S52, the NCU 2
Is turned on, and in S54, a call is made to a designated destination using a calling circuit via the bus 26.

In step S56, the transmission original stored in the memory is determined. If all the information is monochrome information, the process proceeds to step S58. If all the information is color information, the process proceeds to step S64. Proceed to.

In S58, a pre-procedure is executed.
It is assumed that the 68, 69, X, and X + 1 bits of the FIF of the CS signal are all 0.

In S60, the monochrome transmission of the image signal is executed. In S62, the post-procedure is executed. In S64, the pre-procedure is executed. Here, the 68 and 69 bits of the FIF of the DCS signal are set to 1 and X , X + 1 bits are set to 0. In S66, the image signal is transmitted in color. In S68, the post-procedure is executed. In S70, 1 is set to the page counter.

In S72, it is determined whether the information of the page counter is color. If the information of the page counter is color, the process proceeds to step S74. If the information of the page counter is not color, the process proceeds to step S92. .

In S74, a pre-procedure is executed, where D
All the 68, 69, X, and X + 1 bits of the FIF of the CS signal are set to 1, and in S76, the image signal indicated by the page information of the page counter is color-transmitted.

In S78, it is determined whether there is a next page. If there is a next page, the process proceeds to step S82, and the value of the page counter is incremented by 1. If there is no next page, the process proceeds to step S80. Perform the steps.

In S84, it is determined whether or not the information of the page counter is color. If the information of the page counter indicates color, the process proceeds to step S86, and if the information of the page counter does not indicate color, Step S8
Proceed to 8.

At S86, an intermediate procedure is executed.
The Y bit of the IF of the Q signal or the PPS-Q signal is set to 1, and in S88, an intermediate procedure is executed. Here, the Y bit of the FIF of the Q signal or the PPS-Q signal is set to 0. The image signal indicated by the page information of the page counter is transmitted in monochrome.

In S92, a pre-procedure is executed.
The 68, 69 and X bits of the CS signal FIF are set to 1
Set the +1 bit to 0.

In step S94, it is determined whether or not the reception and recording of one page have been completed. If the reception and recording of one page have been completed, the flow advances to step S96 to execute an intermediate procedure, and the process proceeds to step S96.
If the page has not been received or recorded, step S
Go to 20.

In S98, it is determined whether or not there is a mode change. If there is a mode change, the process proceeds to step S18, and if not, the process proceeds to step S100.

In S100, it is determined whether or not there is a next page. If there is a next page, the process proceeds to step S20. If there is no next page, the process proceeds to step S102 to execute a post procedure.

In step S104, it is determined whether the reception and recording of one page have been completed. If the reception and recording of one page have been completed, the flow advances to step S106 to execute an intermediate procedure and execute the reception of one page. If the recording has not been completed, the process proceeds to step S42.

At Sl08, it is determined whether or not there is a mode change.
If there is no mode change, step S110
Proceed to.

In S110, it is determined whether or not there is a next page. If there is a next page, the process proceeds to step S42. If there is no next page, the process proceeds to step S112 to execute a post procedure.

[Second Embodiment] The second embodiment of the present invention relates to a facsimile apparatus capable of communicating color information in the first embodiment, wherein color information is transmitted by a post message signal from a receiver to a transmitter. Even if the color or monochrome that is notified of whether the information is monochrome or information is changed in page units, the means for notifying whether or not there is a function to receive the color and monochrome mixed information is in color and monochrome in page units. Even if it is changed, the presence / absence of the function of receiving the color / monochrome mixed information and the function of receiving and receiving the color information or monochrome information by the post message signal is notified as independent information. It is an example.

The second embodiment of the present invention is the same as the first embodiment, except that a post message signal from the transmitter to the receiver informs whether the information is color information or monochrome information. The means to specify the transmission of mixed original information is specified as transmission of color and monochrome mixed original information, and whether the information is color information or monochrome information as independent information by a post message signal from the transmitter to the receiver. This is an embodiment of the present invention.

FIG. 3 is a diagram showing a specific example of a protocol for color transmission in the second embodiment of the present invention.

Here, F of the DIS, DTC and DCS signals
The 68 and 69 bits of the IF are information determined by the current ITU-T recommendation, and here, an X bit is newly provided.

The 68 bits of the FIF of the DIS and DTC signals are bits indicating the presence or absence of the reception function of the JPEG encoding, and the 68 bits of the FIF of the DCS signal are bits indicating the transmission designation of the JPEG encoding.

The 69 bits of the FIF of the DIS and DTC signals are bits indicating the presence or absence of a full color mode reception function, and the 69 bits of the FIF of the DCS signal are bits indicating designation of transmission in the full color mode.

The X bit of the FIF of the DIS and DTC signals indicates whether or not the color / monochrome information has a function of receiving mixed color / monochrome information even if the color / monochrome information is changed in page units. Are bits for designating the transmission of color information and monochrome information mixed document information.

The X + 1 bit of the FIF of the DIS and DTC signals is a bit indicating whether or not there is a function of receiving and notifying whether color information or monochrome information is received by the post message signal, and the X + 1 bit of the FIF of the DCS signal. Is a bit for designating notification of color information or monochrome information by a post message signal.

The X + 2 bits of the FIF of the DIS and DTC signals are don't cares,
The X + 2 bit of F is a bit designating that the first page is color information (X + 2 of FIF of DCS signal).
Valid when one bit is one).

FIGS. 12 to 14 are flowcharts showing the operation of the second embodiment.

FIGS. 12 to 14 show only parts different from the operations shown in FIGS. 4 to 11.

In S122, a pre-procedure is executed.
The 68 bits, 69 bits, X bits, and X + 1 bits of the FIF of the DIS signal are all set to 1, S124 indicates step S18, and S126 indicates YES in step S18.

In S128, it is determined whether both the X bit and the X + 1 bit of the FIF of the DCS signal are 1 or not.
If both are 1, the process proceeds to step S132, and if at least one is 0, the process proceeds to step S130 (S42).

At S132, X + of the DCS signal FIF
It is determined whether or not two bits are 1, and the FIS of the DCS signal is determined.
If the X + 2 bit of F is 1, the step S136 (S
26), the X + 2 bit of the FIF of the DCS signal is 1
If not, the process proceeds to step S134 (S38).

In step S138, it is indicated that all images are monochrome in step S56. In step S140, the pre-procedure is executed. Here, the FIFs 68, 69,
X, X + 1 and X + 2 bits are all set to 0, and step S60 indicates step S60. In S144, step S
In step S146, the pre-procedure is executed. Here, the DCS signal FIF 6
Bits 8 and 69 are set to 1 and bits X, X + 1 and X + 2 are set to 0.

In step S148, step S66 is shown.
At 150, YES is determined at Step S72, and S152
Then, the pre-procedure is executed. Here, the 68, 69, X, X + 1, and X + 2 bits of the FIF of the DCS signal are all set to 1,
In S154, Step S76 is shown, and in S156,
NO in S72 is indicated, and in S158, the pre-procedure is executed,
Here, DCS signal FIF 68, 69, X, X + 1
The bit is set to 1 and the X + 2 bit is set to 0, and step S160 indicates step S90.

According to the second embodiment, the color or monochrome in which the receiver notifies the transmitter of the color information or the monochrome information by the post message signal is
After confirming that there is a function to receive the color / monochrome mixed information even if it is changed in page units, color / monochrome mixed original information that notifies whether it is color information or monochrome information by a post message signal Can be transmitted, and color and monochrome mixed information can be transmitted reliably and without increasing the communication time.

The third embodiment is different from the first and second embodiments in that in a facsimile apparatus capable of communicating color information, whether the color information or the monochrome information is determined by a post message signal from a receiver to a transmitter. Even if the color / monochrome that has been notified is changed in page units, the means for notifying whether or not there is a function to receive the color / monochrome mixed information is available even if the color / monochrome is changed in page units. The function of receiving monochrome mixed information and the function of receiving and notifying whether color information or monochrome information is received by a post message signal are notified as independent information, while the transmitter transmits the information to the receiver. The transmission of color / monochrome mixed original information in which color information or monochrome information is notified by the post message signal of Means for constant is color, a designation of transmission of monochrome mixed document information, whether the monochrome information or a color information by the post message signal from the transmitter to the receiver, an embodiment for notifying as independent information.

According to the third embodiment, by the mixed communication of the color information and the monochrome information, the presence or absence of the function of receiving the mixed information of the color information and the monochrome information, and the designation of the mixed transmission of the color information and the monochrome information , And the presence or absence of a function for receiving a change notification between color information and monochrome information by designating the same with a post message signal, and enabling a change notification between color information and monochrome information to be designated with a post message signal, The present invention can be realized by a method different from those of the first and second embodiments, and it is possible to transmit mixed information of color and monochrome without fail and without increasing the communication time.

In the fourth embodiment, in a facsimile apparatus capable of communicating color information, a color message or a monochrome image in which whether the information is color information or monochrome information is notified by a post message signal from a receiver to a transmitter is transmitted. Even if the unit is changed, if there is a function to receive the color / monochrome mixed information, it is specified whether the color information or the monochrome information from the transmitter to the receiver by the phase B color information or the monochrome information. Even if the change is specified in page units, it can be received.

In this way, even if the color / monochrome in which the color information or the monochrome information is notified by the post message signal from the receiver to the transmitter is changed in units of pages, the color / monochrome mixed information is changed. If there is a function for receiving color information, it is clear that it is possible to receive even color and monochrome page unit change designation by specifying whether the information is color information or monochrome information in phase B from the transmitter to the receiver. In addition, it is possible to reliably execute mixed communication of color information and monochrome information for designating switching between color information and monochrome information in the phase B from the transmitter.

The above embodiments can be applied to other image communication devices such as a personal computer having an image communication function.

The above embodiment can be understood as an invention of a storage medium. In other words, the above embodiment is a JPE
A procedure for notifying the transmitter of the presence or absence of the G reception function from the receiver, a procedure of notifying the transmitter of the presence or absence of the full-color reception function to the transmitter, and whether the information is color information or monochrome information by a post message signal. Even if the color or monochrome for which the notification has been made is changed on a page basis, the receiver notifies the transmitter whether or not there is a function to receive the color / monochrome mixed information. From the transmitter to the receiver, from the transmitter to the receiver, and from the color and monochrome mixed original information, which is notified by the post message signal whether the information is color information or monochrome information. Send,
7 is an example of a computer-readable storage medium storing a program for causing a computer to execute a procedure designated by a transmitter to a receiver.

As the storage medium, FD, CD,
DVD, HD, semiconductor memory and the like are conceivable.

[0085]

According to the present invention, it is possible to transmit color and monochrome mixed information reliably and without increasing the communication time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a facsimile apparatus FS1 according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a specific example of a protocol at the time of color transmission in the first embodiment.

FIG. 3 is a diagram showing a specific example of a protocol at the time of color transmission in a second embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the first embodiment.

FIG. 5 is a flowchart showing the operation of the first embodiment.

FIG. 6 is a flowchart showing the operation of the first embodiment.

FIG. 7 is a flowchart showing the operation of the first embodiment.

FIG. 8 is a flowchart showing the operation of the first embodiment.

FIG. 9 is a flowchart showing the operation of the first embodiment.

FIG. 10 is a flowchart showing the operation of the first embodiment.

FIG. 11 is a flowchart showing the operation of the first embodiment.

FIG. 12 is a flowchart showing the operation of the second embodiment.

FIG. 13 is a flowchart showing the operation of the second embodiment.

FIG. 14 is a flowchart showing the operation of the second embodiment.

[Explanation of symbols]

 FS1: facsimile machine, 14: reading circuit, 16: recording circuit, 18: memory circuit, 20: operation unit, 22: CPU, 24: ROM.

Claims (7)

[Claims] 1. An image communication apparatus capable of communicating color information, a means for notifying a transmitter of a JPEG receiving function from a receiver to a transmitter; a means of notifying a transmitter of a full-color receiving function to a transmitter. And whether the function of receiving the color / monochrome mixed information is received even if the color / monochrome which has been notified by the post message signal whether the information is color information or monochrome information is changed in page units. Means for notifying the transmitter from the transmitter; means for designating JPEG transmission from the transmitter to the receiver; means for designating full-color transmission from the transmitter to the receiver; Means for designating, from the transmitter to the receiver, transmission of color / monochrome mixed original information notified of whether the information is monochrome information. Image communication apparatus. 2. The method according to claim 1, wherein the transmission of color / monochrome mixed original information in which color information or monochrome information is notified by the post message signal is specified by the post message signal. An image communication apparatus including information indicating whether the transmission information of the next original is color information or monochrome information. 3. The image communication apparatus according to claim 1, wherein, in the image communication apparatus capable of communicating color information, whether the information is color information or monochrome information is notified by a post message signal from the receiver to the transmitter. Color,
The means for notifying whether or not there is a function of receiving color / monochrome mixed information even when monochrome is changed in page units receives the color / monochrome mixed information even when color / monochrome is changed in page units. The function and the function of notifying whether the information is color information or monochrome information by the post message signal and having the function of receiving the information are notified as independent information.The color information is transmitted by the post message signal from the transmitter to the receiver. The means for specifying the transmission of mixed color / monochrome original information that indicates whether the original is monochrome or monochrome information is specified by specifying the transmission of mixed color / monochrome original information and the post message signal from the transmitter to the receiver. Or a notification indicating whether the information is monochrome information, as means for notifying the information as independent information. That the image communication apparatus. 4. The image communication apparatus according to claim 1, wherein the image communication apparatus capable of communicating color information is notified of whether the information is color information or monochrome information by a post message signal from a receiver to a transmitter. Color,
Even if monochrome changes to page unit, its color,
If there is a function to receive monochrome mixed information, it can be received even if it is specified to change color or monochrome page units by specifying whether it is color information or monochrome information in phase B from the transmitter to the receiver. An image communication device, characterized in that: 5. The image communication device according to claim 1, wherein the image communication device is a facsimile device. 6. An image communication method capable of communicating color information, comprising: a step of notifying a transmitter of the presence or absence of a JPEG receiving function from a receiver to a step of notifying a transmitter of the presence or absence of a full-color receiving function. And whether the function of receiving the color / monochrome mixed information is received even if the color / monochrome which has been notified by the post message signal whether the information is color information or monochrome information is changed in page units. Notifying the transmitter from the transmitter; specifying JPEG transmission from the transmitter to the receiver; specifying full color transmission from the transmitter to the receiver; Specifying, from the transmitter to the receiver, transmission of color / monochrome mixed original information notified of whether the information is monochrome information. Image communication method for. 7. A procedure for notifying the transmitter of the presence or absence of the JPEG receiving function from the receiver; a procedure of notifying the transmitter of the presence or absence of the full-color receiving function to the transmitter; and color information by a post message signal. A procedure in which the receiver notifies the transmitter whether or not there is a function for receiving color / monochrome mixed information even if the color / monochrome notified of whether the information is monochrome information is changed in page units; A procedure for designating transmission from the transmitter to the receiver; a procedure for designating full-color transmission from the transmitter to the receiver; a color in which color information or monochrome information is notified by a post message signal; A procedure for designating the transmission of monochrome mixed document information from the transmitter to the receiver; Storage media.