JP2004235991A - Facsimile machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that, when colored original information is JPEG coded by a color spaces YCC and transmitted and a RST (restart) marker is transmitted on the way of its JPEG coding, there is possibility that a communication error occurs without recognizing the marker at a receiver side. <P>SOLUTION: In a facsimile machine which can communicate color image information, when the transmission of the JPEG coding information of the color spaces YCC is designated (S56), the RST marker is not transmitted at the coding information transmitting time (S57). <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technology for transmitting and receiving color image information.
[0002]
[Prior art]
A conventional facsimile apparatus capable of communicating color information is described in ITU-T Recommendation T.40. 30, T.I. 4, T. 81, T.R. The color communication was performed in the color space Lab defined in 42. 2. Description of the Related Art Recently, digital cameras have become widespread, and there has been an increasing need to transmit color image information captured by the digital cameras as they are using a facsimile protocol. However, the color space of the color image information used in the digital camera is a color space sYCC different from Lab in the above recommendation. For this reason, there is a need for transmitting JPEG encoded information in the color space sYCC of a color image handled by the digital camera as it is under the above-mentioned recommendation.
[0003]
[Problems to be solved by the invention]
However, transmission of a full-color image JPEG-encoded in the color space sYCC is basically not transmission of color image information obtained by reading a color original, but transmission of file information captured by a digital camera and stored in a memory card. It seems that there are many cases. When transmitting the image information stored in the memory card, the color image is transmitted after the color image information for at least one page (sheet) is stored in the memory card. Therefore, unlike the case of transmitting color document information in the conventional color space Lab, the number of cases in which recovery is performed after data error in the middle in consideration of facsimile communication is reduced, and as a result, RST (restart) is performed. It is expected that there will be many communications that do not use. Under these circumstances, the color original image is read, the color original information is JPEG-encoded in the color space sYCC and transmitted, and an RST (restart) marker is transmitted in the middle of the JPEG code. It is feared that a communication error occurs because the marker cannot be recognized.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional example, and when color original information is transmitted by JPEG encoding of the color space sYCC, transmission of an error without transmitting an RST (restart) marker is performed. It is an object of the present invention to provide a facsimile apparatus with reduced size.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a facsimile apparatus of the present invention has the following configuration. That is,
A facsimile machine capable of communicating color image information,
Means for notifying the receiver of transmission of JPEG encoded information in the color space Lab;
Means for notifying the receiver of transmission of full-color image information in the color space Lab;
Means for notifying the receiver of the transmission of the JPEG encoded information of the color space sYCC,
Control means for controlling transmission of the RST marker to be prohibited when transmission of JPEG encoded information of the color space sYCC is designated;
It is characterized by having.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0007]
FIG. 1 is a block diagram showing a configuration of a facsimile apparatus according to an embodiment of the present invention.
[0008]
In the figure, reference numeral 2 denotes an NCU (network control device) which connects the telephone line 2a to another terminal via the telephone line 2a or controls connection of a telephone switching network in order to use the telephone line 2a for data communication or the like. The NCU 2 switches to a data communication path or holds a loop. Further, the NCU 2 is controlled by the CPU 22 via the bus 26 to connect the telephone line 2a to the telephone 4 (CML off) or connect the telephone line 2a to the facsimile apparatus (hybrid circuit 6) (CML on). ). In a normal state, the telephone line 2a is connected to the telephone 4 (2b). Reference numeral 6 denotes a hybrid circuit that separates a transmission system signal and a reception system signal, and sends a transmission signal 12a from the addition circuit 12 to the telephone line 2a via the NCU 2. Also, a signal from the other party is received via the NCU 2 and sent to the modem 8 via the signal line 6a. Reference numeral 8 denotes a modem (modem), which is an ITU-T Recommendation V.8. 8, V. 21, V.I. 27ter, V.A. 29, V.S. 17, V. 34, and perform modulation and demodulation. The transmission mode in the modem 8 is instructed under the control of the CPU 22 via the bus 26. The modulator / demodulator 8 receives a transmission signal via the bus 26, outputs the modulated data to the signal line 8a, and transmits the modulated data. On the other hand, it demodulates the received signal input via the signal line 6 a and outputs it to the bus 26. A calling circuit 10 inputs telephone number information via a bus 26 and outputs a DTMF selection signal to a signal line 10a. Reference numeral 12 denotes an adder circuit, which inputs information on the signal line 8a and information on the signal line 10a, and outputs a result obtained by adding them to the signal line 12a.
[0009]
A reading circuit 14 is capable of reading a color image, and outputs the read color image data to a bus 26. Reference numeral 16 denotes a recording circuit capable of recording a color image, which inputs recording information via a bus 26, and sequentially records each line in accordance with the recording information. Reference numeral 18 denotes a memory (RAM) for storing a work memory (RAM), raw information of image data read by the reading circuit 14, or information obtained by encoding the image information, and a telephone line 2a. , And information obtained by decoding the information and the like are input via the bus 26 and stored. Reference numeral 20 denotes an operation unit. One-touch dial, speed dial, numeric keypad, * key, # key, start key, stop key, set key, selection key for selecting reading of color information, key for selecting transmission of file information, received A selection key for transferring file information to the card, a key for setting various modes, and other function keys are provided. Key information operated by the operation unit 20 is output via the bus 26. The operation unit 20 is provided with a display unit, on which information input via the bus 26 is displayed. A CPU (Central Processing Unit) 22 controls the operation of the entire facsimile apparatus according to the present embodiment and executes a facsimile transmission control procedure. The control program of the CPU 22 is stored in the ROM 24. Reference numeral 28 denotes a card interface unit in which a memory card 30 (for example, a card memory storing information captured by a digital camera) is set.
[0010]
FIG. 2 shows bit information related to transmission / reception of a color image according to the embodiment of the present invention and a new ITU-T Recommendation T.40. FIG. 3 is a diagram illustrating information added to 30.
(1) The presence / absence of the function of receiving the JPEG code in the color space Lab is notified by the FIF bit 68 of the DIS / DTC signal. Further, transmission of the JPEG code in the color space Lab is designated by the bit 68 of the FIF of the DCS signal.
(2) The presence / absence of a function for receiving full-color image information whose color space is Lab is notified by the bit 69 of the FIF of the DIS / DTC signal. Also, transmission of full-color image information in the color space Lab is designated by the bit 69 of the FIF of the DCS signal.
(3) The presence or absence of the function of receiving the JPEG code in the color space sYCC is notified by the bit X of the FIF of the DIS / DTC signal. Further, the transmission by the JPEG code in the color space sYCC is designated by the bit X of the FIF of the DCS signal.
[0011]
In the facsimile apparatus capable of communicating color image information according to the present embodiment having the above configuration, whether or not the receiver has a function of receiving JPEG encoded information in the color space Lab from the receiver in the pre-procedure. , The presence or absence of the function of receiving full-color image information in the color space Lab and the presence or absence of the function of receiving JPEG encoded information in the color space sYCC.
[0012]
On the other hand, from the transmitter to the receiver, transmission designation of JPEG encoded information in the color space Lab, transmission designation of full color image information in the color space Lab, or transmission designation of JPEG encoded information in the color space sYCC is performed. . If the transmitter specifies transmission of JPEG encoded data in the color space sYCC, the transmitter prohibits transmission of an RST (restart) marker. On the other hand, when transmission of JPEG encoded data in the color space Lab is specified, the transmitter permits transmission of an RST (restart) marker.
[0013]
3 to 10 are flowcharts showing processing in the facsimile apparatus according to the embodiment of the present invention. A program for executing this processing is stored in the ROM 24 and executed under the control of the CPU 22.
[0014]
First, in step S1, the contents of the memory 18 are initialized via the bus 26. Next, the process proceeds to step S2, where the display unit of the operation unit 20 is cleared via the bus 26. Then, the process proceeds to step S3, where the CML of the NCU 2 is turned off via the bus 26. Next, the process proceeds to step S4, where it is determined whether or not facsimile reception is selected in the facsimile apparatus. If facsimile reception is selected, the process proceeds to step S5, and if not, the process proceeds to step S8.
[0015]
When the reception is selected, the process proceeds to step S5, and the CML of the NCU 2 is turned on via the bus 26. Next, the process proceeds to step S6, where the pre-procedure is executed. Here, all bits 68, 69 and X bits of the FIF of the DIS signal are set to "1". Then, the process proceeds to step S7, where it is determined whether the bit X of the FIF of the DCS signal is “1” (whether JPEG transmission in the color space sYCC is designated) or not, and if so, step S10 (FIG. 4). If not, the process proceeds to step S24 (FIG. 5C) to check whether JPEG transmission in the color space Lab is specified.
[0016]
On the other hand, if facsimile reception has not been selected in step S4, the flow advances to step S8 to check whether facsimile transmission has been selected. Otherwise, the process proceeds to step S9, executes the other specified processing, and proceeds to step S43 (FIG. 7B). If transmission is selected, the process proceeds to step S51 (FIG. 8).
[0017]
In step S7, when bit X is [1] and JPEG transmission in the color space sYCC is specified, the process proceeds to step S10 (FIG. 4) to determine whether the memory card 30 is set and can be received. It is determined whether or not it is, and if so, the process proceeds to step S11, and the JPEG encoded data of the color space sYCC is received and stored in the memory card 30. Then, the process proceeds to step S12, executes the post-procedure, and returns to step S3 (FIG. 3).
[0018]
On the other hand, if the memory card 30 is not set in step S10, the process proceeds to step S13, where it is determined whether or not a recording sheet is set in the recording circuit 16. If there is a recording sheet, the process proceeds to step S14, where the color space sYCC The JPEG encoded data is received, decoded, and printed by the recording circuit 16. Then, the process proceeds to step S15, executes the post-procedure, and returns to step S3 (FIG. 3).
[0019]
On the other hand, if the recording paper is not set in the recording circuit 16 in step S13, the process proceeds to step S16, and it is determined whether the data received by facsimile can be stored in the memory 18. This is determined based on whether or not the memory 18 has an empty area larger than a predetermined amount. If it can be stored in the memory 18, the process proceeds to step S21 (FIG. 5A), and the JPEG encoded data of the color space sYCC is received and stored in the memory 18. Then, the process proceeds to step S22, executes the post-procedure, and returns to step S3 (FIG. 3). If the data cannot be stored in the memory 18 in step S16 (FIG. 4), the process proceeds to step S23 (FIG. 5B), and "Please print the information received in the memory" is displayed on the display unit of the operation unit 20. . As a result, the received data received in the memory and stored in the memory 18 is printed by the recording circuit 16 by the operation of the operator, and thereafter deleted. As a result, a vacant area equal to or more than a predetermined amount is generated in the memory 18, so that the memory can be received from the next time. This display is deleted by any key operation of the operation unit 20.
[0020]
If the JPEG transmission in the color space sYCC is not specified in step S7 (FIG. 3), the process proceeds to step S24 (FIG. 5C), and the FIF bit 68 of the DCS signal is “1”. Is determined (JPEG transmission data in the color space Lab), and if so, the process proceeds to step S25, where it is determined whether or not a recording sheet is set in the recording circuit 16, and if so, step S26 is performed. The JPEG encoded data in the color space Lab is received, decoded, and printed by the recording circuit 16. Then, the process proceeds to step S31 (FIG. 6A), executes a post-procedure, and returns to step S3 (FIG. 3).
[0021]
On the other hand, if there is no recording paper in step S25 (FIG. 5C), the process proceeds to step S32 (FIG. 6B) to determine whether the received data can be stored in the memory 18 as in step S16 described above. Is determined, and if it can be stored, the process proceeds to step S33, and the received JPEG encoded data of the color space Lab is stored in the memory 18. Then, the process proceeds to step S34 to execute a post-procedure, and returns to step S3 (FIG. 3).
[0022]
If it is determined in step S24 that the JPEG code data is not transmitted in the color space Lab, the process proceeds to step S35 (FIG. 6C), where it is determined whether or not the recording paper is set in the recording circuit 16, and the setting is performed. If so, the process proceeds to step S36, where the monochrome facsimile image information is received, decoded, and printed by the recording circuit 16. Then, the process proceeds to step S37 to execute a post-procedure, and returns to step S3 (FIG. 3).
[0023]
If no recording paper is set in the recording circuit 16 in step S35, the flow advances to step S38 to determine whether or not the received data can be stored in the memory 18 as in steps S16 and S32 described above. If possible, the process proceeds to step S41 (FIG. 7A), and the received monochrome image information is stored in the memory 18 of the main body. Then, the process proceeds to step S42, performs a post-procedure, and returns to step S3 (FIG. 3).
[0024]
After executing the above-described step S9 (FIG. 3), the process proceeds to step S43 (FIG. 7B), where the key operation information on the operation unit 20 is input, and the image information stored in the memory 18 is received by proxy. It is determined whether or not the print is designated. If not, the process returns to step S3. If the recording of the substitute reception data is designated, the process proceeds to step S44, and the color or monochrome is used by using the recording circuit 16 in accordance with the reception information of the selected substitute reception information. Print the image. When the memory proxy reception data is printed in this way, the printed data is deleted from the memory 18. Then, the process returns to step S3 (FIG. 3).
[0025]
Next, processing when facsimile transmission is selected will be described.
[0026]
In this case, the process proceeds from step S8 (FIG. 3) to step S51 (FIG. 8), and turns on the CML of the NCU 2 via the bus 26. Next, the process proceeds to step S52, and a call is made to the designated destination using the calling circuit 10 via the bus 26. Then, the process proceeds to step S53, executes the pre-procedure, and proceeds to step S54. In step S54, information from the operation unit 20 is input, and it is determined whether transmission of file information has been selected. If so, the process proceeds to step S55; otherwise, the process proceeds to step S59. In step S55, it is determined whether the bit X of the FIF of the DIS signal is "1" (whether the receiver has a function of receiving a JPEG code in the color space sYCC), and if so, the process proceeds to step S56. Perform the remaining pre-steps. Here, the bit X of the FIF of the DCS signal is set to “1” to specify the transmission of the JPEG code in the color space sYCC. Then, the process proceeds to a step S57, where the full-color image information of the JPEG code in the color space sYCC stored in the memory card 30 set in the card interface 28 is read and transmitted. Here, the RST (restart) marker is not used. Then, the process proceeds to step S58, performs a post-procedure, and returns to step S3 (FIG. 3).
[0027]
On the other hand, if it is determined in step S54 that the transmission of the file information has not been selected, the process proceeds to step S59, and it is determined based on the information from the operation unit 20 whether the transmission of the color original information has been selected. If so, proceed to step S74; otherwise, proceed to step S71.
[0028]
If it is determined in step S55 that the receiver does not have the function of receiving the JPEG code in the color space sYCC, the process proceeds to step S60, and the display unit of the operation unit 20 displays “Execute specified color communication. The communication is interrupted because it is not possible. "Is displayed to warn the operator that the receiver does not have a function of receiving the image information to be transmitted. This display is deleted by any key operation. Then, the process proceeds to step S3.
[0029]
If it is determined in step S59 that transmission of color document information has not been selected, the flow advances to step S71 (FIG. 9A) to execute the remaining pre-procedures. Here, the bits 68, 69, and X of the FIF of the DCS signal are all set to “0”. Then, the process proceeds to step S72, where the reading circuit 14 reads and encodes the monochrome document information, and transmits it. Then, the process proceeds to step S73, executes the post-procedure, and returns to step S3 (FIG. 3).
[0030]
If transmission of color document information is selected in step S59, the process proceeds to step S74 (FIG. 9B), where information is input from the operation unit 20 and color space sYCC or color space sYCC is transmitted when color document information is transmitted. It is determined whether any of the color spaces Lab has been selected. If the color space Lab has been selected, the flow advances to step S75 to determine whether the FIF bits 68 and 69 of the DIS signal are "1" (whether the JPEG code reception or the full color reception function in the color space Lab is provided). ) Is determined, and if so, the flow advances to step S76 to execute the remaining pre-procedures. Here, FIF bits 68 and 69 of the DCS signal are set to “1”. Next, the process proceeds to step S77, where the color original information is transmitted as JPEG encoded full color information in the color space Lab. Here, an RST (restart) marker is transmitted. Then, the process proceeds to step S81 (FIG. 10A), executes the post-procedure, and returns to step S3. If it is determined in step S75 that there is no JPEG code reception or full-color reception function in the color space Lab, the flow advances to step S71 in FIG. 9A to transmit monochrome original image information.
[0031]
On the other hand, in step S74 (FIG. 9B), if neither the color space sYCC or the color space Lab is selected, the process proceeds to step S82 (FIG. 10B), and the bit X of the FIF of the DIS signal is set. It is determined whether or not it is "1". If it is "1", the process proceeds to step S83, and the remaining pre-procedure is executed. Here, the bit X of the FIF of the DCS signal is set to “1” (transmission specification of the JPEG code in the color space sYCC). Next, the process proceeds to step S84, where the full-color information obtained by JPEG-encoding the color original information in the color space sYCC is transmitted. Here, the RST (restart) marker is not transmitted. Then, the process proceeds to step S85, executes the post-procedure, and returns to step S3 (FIG. 3). If the bit X of the FIF of the DIS signal is not "1" in step S82, the flow advances to step S71 in FIG. 9A to transmit monochrome original image information.
[0032]
As described above, according to the present embodiment, in a facsimile apparatus capable of transmitting information captured by a digital camera, an RST (restart) marker is not used when transmitting JPEG encoded document information in a color space sYCC. Even if the receiver only considers receiving information captured by a digital still camera in the color space sYCC, receiving a RST (restart) marker will not cause a communication error, and the An easy-to-use facsimile machine can be provided.
[0033]
Further, when transmitting color document information in the color space Lab, an RST (restart) marker is transmitted. Therefore, even if JPEG encoded data is broken for some reason on the receiver side, it can be restored from the middle of the page.
[0034]
[Other embodiments]
As described above, an object of the present invention is to provide a storage medium storing a program code of software for realizing the functions of the embodiments to a system or an apparatus, and a computer (or CPU or MPU) of the system or the apparatus stores the storage medium. This is also achieved by reading and executing the program code stored in the medium. In this case, the program code itself read from the storage medium realizes the function of the above-described embodiment, and the storage medium storing the program code constitutes the present invention. As a storage medium for supplying such a program code, for example, a floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM Etc. can be used.
[0035]
When the computer executes the readout program code, not only the functions of the above-described embodiments are realized, but also an OS (Operating System) running on the computer based on the instruction of the program code. Performs some or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.
[0036]
Further, after the program code read from the storage medium is written into the memory provided on the function expansion board inserted into the computer or the function expansion unit connected to the computer, the function is executed based on the instruction of the program code. This also includes the case where the CPU provided in the expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.
[0037]
Each embodiment described above can be represented by the following embodiments.
[0038]
Embodiment 1 A facsimile apparatus capable of communicating color image information,
Means for notifying the receiver of transmission of JPEG encoded information in the color space Lab;
Means for notifying the receiver of transmission of full-color image information in the color space Lab;
Means for notifying the receiver of the transmission of the JPEG encoded information of the color space sYCC,
Control means for controlling transmission of the RST marker to be prohibited when transmission of JPEG encoded information of the color space sYCC is designated;
Facsimile machine characterized by having:
[0039]
[Second Embodiment] The facsimile apparatus according to the first embodiment, wherein the control unit permits transmission of the RST marker when transmitting JPEG full-color image information of the color space Lab.
[0040]
[Embodiment 3] A communication control method in a facsimile apparatus capable of communicating color image information,
Notifying the receiver of the transmission of the JPEG encoded information in the color space Lab;
Notifying the receiver of transmission of full-color image information in the color space Lab;
Notifying the receiver of the transmission of the JPEG encoded information of the color space sYCC,
A control step of controlling transmission of the RST marker when transmission of JPEG encoded information of the color space sYCC is designated;
A communication control method comprising:
[0041]
[Embodiment 4] The communication control method according to Embodiment 3, further comprising a step of permitting transmission of the RST marker when transmitting JPEG full-color image information of the color space Lab.
[0042]
【The invention's effect】
As described above, according to the present invention, when color original information is transmitted by JPEG encoding of the color space sYCC, the occurrence of a communication error can be suppressed by transmitting without using an RST (restart) marker. There is an effect that can be.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing a configuration of a facsimile apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram showing a specific example of FIF information of DIS / DTC and DCS signals used in the facsimile apparatus according to the present embodiment.
FIG. 3 is a flowchart illustrating a control flow in the facsimile apparatus according to the present embodiment.
FIG. 4 is a flowchart illustrating a control flow in the facsimile apparatus according to the present embodiment.
FIG. 5 is a flowchart illustrating a control flow in the facsimile apparatus according to the present embodiment.
FIG. 6 is a flowchart illustrating a control flow in the facsimile apparatus according to the present embodiment.
FIG. 7 is a flowchart illustrating a control flow in the facsimile apparatus according to the present embodiment.
FIG. 8 is a flowchart illustrating a control flow in the facsimile apparatus according to the present embodiment.
FIG. 9 is a flowchart illustrating a control flow in the facsimile apparatus according to the present embodiment.
FIG. 10 is a flowchart illustrating a control flow in the facsimile apparatus according to the embodiment of the present invention.

Claims (1)

A facsimile machine capable of communicating color image information,
Means for notifying the receiver of transmission of JPEG encoded information in the color space Lab;
Means for notifying the receiver of transmission of full-color image information in the color space Lab;
Means for notifying the receiver of the transmission of the JPEG encoded information of the color space sYCC,
Control means for controlling transmission of the RST marker to be prohibited when transmission of JPEG encoded information of the color space sYCC is designated;
Facsimile machine characterized by having:

Images