KR100273753B1 - Color data transmitting/receiving method in a gpoup3 facsimile - Google Patents

Abstract

PURPOSE: A color transmitting and receiving method is provided to transmit and receive a color at a G3 facsimile in the case where a facsimile of a transmitting side is interconnected with a personal computer and a facsimile of a receiving side is interconnected with a color printer. CONSTITUTION: A central processing unit checks whether a color document drawn by a personal computer is transmitted when a user selects a transmission function(201). If so, the central processing unit dials a facsimile number of a receiving side when the user pushes the facsimile number(203). The central processing unit sends a calling tone(CNG) signal to the receiving side(204), and checks whether a CED signal is received from the receiving side(205). If so, the central processing unit checks a non-standard facsimile(NSF) signal received from the receiving side and checks whether the receiving side is appropriate for receiving a color(206). If so, the central processing unit sends data after separating each color by a line unit and coding an image(208). If not, a normal mode transmission is performed(207).

Description

How to send and receive colors of G-Facsimile {COLOR DATA TRANSMITTING / RECEIVING METHOD IN A GPOUP3 FACSIMILE}

The present invention relates to a facsimile that works with a PC, and more particularly, to a method for performing color transmission and reception using a G3 (GROUP3) facsimile.

In general, a facsimile machine capable of color printing (commonly referred to as a facsimile machine) can send and receive facsimile images only in binary black and white, but when used as a printer for a PC (for example, an inkjet printer). There is even a color print. However, in the case of the conventional G3 (GROUP3, hereinafter referred to as G3) facsimile color transmission and reception is impossible, and for the color transmission and reception must use the G4 (GROUP4) facsimile using the ISDN network. However, it is expected that it will take a long time before the G4 facsimile becomes common, and the price will be higher than that of the G3 facsimile. The reason why color transmission and reception using the G3 facsimile is not possible is that even if a color document is written using a PC, '1 (Black)' or '0 (White)' is determined through the handshaking of the protocol specified in CCITT. Sends the image coded by Run-Length method of binary data of ', decodes it in the same way and prints it, and finally changes it to the document of mono (called only black and white). Therefore, color transmission and reception could not be performed. This will be described in detail through the corresponding drawings.

First, a configuration of a general G3 facsimile that works with a PC will be described with reference to FIG.

The CPU 10 controls the overall operation of the facsimile according to the set program. The memory unit 12 is composed of a RAM and a ROM, and stores telephone numbers or image data and temporarily stores data generated when a program is executed. OPE (OPERATING PANEL) 14 is provided with a plurality of function keys and numeric keys, the display unit for applying the key data according to the pressing of the key to the central processing unit 10, and displays the operation state by the control of the central processing unit 10 It is provided. The scanner 16 reads the original and supplies the image data to the CPU 10 when the original is supplied. The modem 18 performs analog modulation on the transmission data under the control of the CPU 10, and demodulates the analog reception data. The LIU (LINE INTERFACE UNIT) 20 is operated under the control of the CPU 10 to form a call loop of a telephone line, and interfaces the signal of the modem 18 with the signal of the telephone line. The printer 22 prints image data on a recording sheet under the control of the central processing unit 10. The printer 22 may be a color printer (for example, an inkjet printer) in the case of a facsimile machine. PC connection section 24 is a connection section connected to a PC for use in conjunction with a PC. The transmission and reception mutual facsimile configuration for the transmission and reception of a G3 facsimile equipped with a color printer and having a color printer is shown in FIG. 2, and FIG. 2 is a general transmission / reception configuration diagram of a facsimile that transmits and receives a document created by a PC. to be. A method of processing a color document in a conventional G3 facsimile will be described with reference to FIG. 3. FIG. 3 is a view showing a processing method when transmitting a color document of a conventional G3 facsimile.

Even if a color document is created by the PC, the conventional run-length method in the process of transmitting it is only encoded by black / white binary data, and thus the original state printed according to the received data becomes a black and white document. . This is because data in the case of performing image data transmission / reception using a conventional protocol is configured as shown in FIG. 4.

As a result, even if a conventional G3 facsimile is interworking with a PC and is equipped with a color printer, color transmission and reception were impossible since there is no conventional method of expressing a color in a coding process for transmission.

As described above, there is a problem that color transmission and reception are not possible with the conventional G3 facsimile, but the G4 facsimile should be used for color printing, but there is a problem that a considerable period of time is still required for the G4 facsimile to be generalized.

Accordingly, an object of the present invention is to provide a method for performing color transmission / reception in a G3 fax machine when a sending side facsimile is interworking with a PC and a receiving side facsimile is used in conjunction with a color printer.

In order to achieve the above object, the present invention provides a method for transmitting and receiving a color document in color in a G3 fax machine interworking with a PC, a process of creating a color document using the PC, and a fax transmission mode after creating the color document. A process of setting a color, a process of separating color documents created by using the PC after setting the fax transmission mode, color coding the separated image for each color into binary data, and each coded color. Assigning a unique ID to the header of the data, organizing the coded color data together with the black data into a group of the same line, transmitting the data configured as described above to the receiver, and at the receiver Receiving the data, searching for a header ID of the received data, setting a line of data, and receiving the received data And decoding the decoded line on the set line, and printing the decoded data using a color ink.

1 is a block diagram of a typical G3 fax machine that works with a PC

2 is a general transmission / reception configuration diagram of a facsimile that transmits and receives a document created by a PC.

3 is a view showing a processing method for transmitting a color document of a conventional G3 fax machine;

4 is a data configuration diagram in a normal mode according to a conventional transmission

5 is a diagram of a newly defined G3 protocol format for performing color transmission and reception according to the present invention.

Fig. 6 is a diagram of a communication protocol between send and receive faxes in CCITT T.30.

7 is an information data format diagram carried on an NSF.

8 is a color document transmission and reception diagram according to the present invention.

FIG. 9 is a diagram illustrating processing of separating images of color documents created by a PC from a G3 facsimile according to an embodiment of the present invention by color for transmission.

10 is an example of a data configuration capable of color transmission and reception according to the present invention.

11 is a control flowchart for performing color transmission using a PC-linked G3 fax machine according to an embodiment of the present invention.

12 is a control flow diagram for confirming whether a receiving side G3 facsimile machine according to an embodiment of the present invention is a color document receivable fax.

13 is a flowchart illustrating processing of color data received by a receiving side fax according to an embodiment of the present invention.

14 is a flowchart illustrating operations of a transmit / receive facsimile according to color transmit / receive according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention, such as specific processing flows. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Detailed description of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted, and the facsimile configuration and reference numerals according to the present invention are the same as in FIG. It is to be noted that the same reference numerals as in 2 apply.

In order for the G3 facsimile according to the present invention to perform color transmission and reception, a new protocol definition as shown in FIG. FIG. 5 is a diagram of a newly defined G3 protocol format for color transmission and reception according to the present invention, and a header definition is added as compared with the conventional G3 protocol format shown in FIG. The header is a code table indicating a specific color. As illustrated in FIG. 5, black is code '00', blue is code '01', and red is code '10'. Yellow means that each color can be recognized by giving a unique identification of code '11'. The image data table is an image coded with binarized data of '1' or '0' as in the related art. End of line (EOL) is a signal indicating the end of a line. Data coding for transmission is coded using MR / MH, which is a G3 transmission method.

FIG. 6 is a diagram of a communication protocol between T.30 transmit / receive faxes currently defined in CCITT-41530, and FIG. 7 is information data carried on a non-standard facility (NSF) of a receiver during the communication protocol of FIG. 6. Format drawing. According to the present invention, the information data format carried in the NSF is composed of a total of 8 bytes, and color option information is carried at a 7-byte position. For example, when there is a color option function according to the present invention, '01' is loaded with information of '00', which is a normal mode without color options. The sending side facsimile searches the color option data of the NSF signal to determine whether color transmission is possible.

8 shows a method for processing a color document in color transmission according to the present invention. 8 is a color document transmission / reception diagram. When an original text (color document written in a PC) of an original to be transmitted is created in a plurality of colors, three colors (red / blue / yellow) of an image of the created color document are first transmitted to transmit the same. Separate with). The reason for separating the color into three colors is because different colors can be represented by the combination of the three colors (Red / Blue / Yellow). Then, the separated image for each color is coded as data, and then each data is transmitted to the receiving side by a predetermined sequence. At this time, the data for each color to be transmitted are only binarized data of '1' or '0', and in order to distinguish each color, each color information is loaded together with the header shown in FIG. Then, the receiving side fax decodes the received data again and combines each color and prints it on the recording paper using color ink in the color printer. The printed color document is the same as the color document at the time of transmission. . A method of separating and coding each color image into data in the above-described color document will be described in detail with reference to FIG. 9. FIG. 9 is a diagram in which the image of a color document created by a PC is processed by color for transmission in the G3 facsimile according to an embodiment of the present invention, and the color document created by the PC is a combination of three colors of red / blue / yellow. In the case of the constructed image, the image created on the nth line is transmitted as color data, and the receiving side recognizes the data and reproduces the image for each color on the nth line. The n-th line shows an image in which blue, red, and yellow colors are respectively or superimposed. In order to recognize this as color data at the receiver and to reproduce each color image on the n-th line, the combination of the three colors of blue / red / yellow is separated for each color. This results in a separation form such as the original data division configuration diagram at the time of transmission in FIG. After that, the image of each color of the nth line is coded as data. If only blue is separated and coded as data, the coded data is coded as '1' where the blue image is located and other areas are coded as '0'. At this time, a blue unique ID, '01' in the above example, is assigned to the header to recognize the blue color. Similarly, red and yellow data coding is performed. Since the data separated by each color exists in one line—sometimes overlapped in the same area—in some cases, the receiving side facsimile recognizes the data that is separated into the three colors and coded in each data area. There is a need for a method that can be used in the present invention. In the G3 protocol format shown in the lower part of the figure shown in FIG. 9, line discrimination uses the EOL signal and the header's color data (unique ID assigned by color). In this method, an EOL signal is accompanied at the end of a line regardless of whether the same line is used. When the EOL signal is detected, the line is recognized first. Also, it is possible to know whether the end of the line is the initialization of the same line or the transition to the next line by searching the header's color data. After the black data and the black color code '00' described above are detected in the header, It is regarded as the same line until the next black data '00' is detected. If the '00' code is detected in the header as shown in FIG. 9, the header code detected after the line termination of the data for the '00' code is '01', '10', and '11' consecutively. In this case, color is combined by decoding data for each header code on the same line (nth line in FIG. 9) without instructing the transition to the next line yet. When a code of '00' is detected in the next header, it is determined as the start of the next line (n + 1 line) and data decoding of the next line is performed. The decoding process of the next line is also performed in the same manner as described above. 10 is an example of a data configuration capable of color transmission and reception according to the present invention. As shown in FIG. 10, the line number is determined by '00', which is the black code of the header, and each line is a maximum of 4 lines (blue / red / yellow) at least 1 line (a line composed only of black codes). Up to the same line). In addition, if an RTC (Return To Control) indicating the end of the document is detected, the end of the document is determined. The RTC consists of the six consecutive EOL signals defined in CCITT. Based on the above description, a method of performing color transmission using a PC-linked G3 fax machine according to an embodiment of the present invention will be described with reference to FIG. 11.

11 is a control flowchart for performing color transmission using a PC-linked G3 fax machine according to an embodiment of the present invention.

In step 201, when the transmission function is selected by the user, the central processing unit 10 checks whether or not to transmit the color document created by the PC. As a result of the check, if the transmission function selected by the user is a color document transmission made by the PC, the flow proceeds to step 203, and if the transmission function is other than that, the control function is performed. Since it is judged unnecessary in the description of the present invention, descriptions of transmission functions other than the color document transmission function created by the PC will be omitted. When the CPU 10 proceeds to step 203, when the user presses the fax number of the receiving side 120 using the numeric key of the OPE 14, the CPU 10 dials it. Thereafter, the specified protocol for communicating with the receiving side 120 is performed. The communication protocol is shown in FIG. In step 204, the first step of performing the protocol communication, the CPU 10 transmits a CNG signal to the receiving side 120. Thereafter, in step 205, the CPU 10 checks whether a CED signal, which is a response signal from the receiver 120, is received. When the CED signal is received as a result of the test, the process proceeds to step 206. In step 206, the central processing unit 10 examines the NSF signal received from the receiving side 120 to determine whether the receiving side 120 is a model suitable for color reception. The reception of the color reception eligibility of the receiving side 120 examines the color option information carried in 7 bytes from the 8-byte information of the NSF shown in FIG. 7, and the color option information is the color code '01' shown in FIG. If the CPU 10 proceeds to step 208, otherwise proceeds to step 207 to perform normal mode transmission. This process is shown in FIG. This will be described later in detail. In step 208, the central processing unit 10 separates each color in line units, codes an image, and transmits data. The process of step 208 is performed by the method shown in FIGS. 9 and 10. Thereafter, in step 209, the CPU 10 checks whether data transmission is completed, and if the data transmission is completed, proceeds to step 210; otherwise, returns to step 208 to sequentially perform the subsequent steps. Thereafter, in step 210, when the MCF (Message Confirmation Confirmation) message is received, the CPU 10 ends the transmission operation.

Referring to the above-described process of FIG. 12, FIG. 12 is a control flowchart for confirming whether a receiving side is a color document receivable fax in a transmitting side G3 facsimile according to an embodiment of the present invention.

In operation 301, the CPU 10 checks whether an NSF is received from the receiver 120. If the NSF is received, the process proceeds to step 302. In step 302, the central processing unit 10 searches for information carried in the NSF and checks whether 7 bytes of the information are '01', which is a color code. If the code information contained in the seven bytes is '01', the process proceeds to step 304 and performs color transmission for color transmission. If the code information contained in the seven bytes is '00', the normal processing is performed.

As described above, the transmitting side 100 transmits a color document, and the receiving side 120 receiving the same should analyze the received data and print it as a color image using a color printer. Referring to the description,

In step 401, the central processing unit 10 (hereinafter, referred to as a central processing unit) of the receiving side facsimile operates in the fax receiving mode according to the CNG detection. The color mode check is performed by analyzing a signal received from the transmitting side 100 through protocol communication. If the color mode is confirmed by the color mode test, the process proceeds to step 404. Otherwise, the process proceeds to step 403 if the normal mode is performed. The operation of the normal mode is not described here. In step 404, the central processing unit 10 checks whether the EOL signal is received on the first line by checking the message data as shown in FIG. 10. If the EOL signal is detected, the process proceeds to step 405. Sends an error signal to the transmitting side 100 and terminates. Since the signal loaded at the beginning of the message data is an EOL signal, it is recognized as an error if the first EOL signal is not checked during the message data search. In step 405, the CPU 10 returns to step 404 when the code value '00' is not received in the header of the first line of the message data. If the code value loaded in the header is '00', the process proceeds to step 406. In step 406, the central processing unit 10 searches for image data corresponding to the header code value '00' and processes black / white data. When the next EOL signal is received, increase the line number (counter value) by one. The CPU 10 then retrieves the code value of the header. In step 407, the CPU 10 checks whether or not the code value of the found header is' 00 '. If' 00 'is correct, the CPU 10 returns to step 406 to sequentially perform a subsequent process, and the code value of the found header is' If not 00 ', go to step 408. In step 408, the central processing unit 10 checks whether the header value of the header is '01', and if '01' is correct, proceeds to step 409 and processes the blue / white data, and returns to step 406. If the value is not '01', go to step 410. In step 410, the central processing unit 10 checks whether the header value of the header is '10', and if '10' is correct, proceeds to step 411, processes the red / white data, and returns to step 406. If the value is not '10', go to step 412. In step 412, the central processing unit 10 checks whether the header value of the header is '11'. If '11' is correct, the CPU 10 proceeds to step 413, processes the yellow / white data, and returns to step 406. If the value is not '11', go to step 414. In step 414, the central processing unit 10 terminates when the RTC signal indicating the end of the message data is received, and returns to step 407 if it is not received.

13, the [EOL] [header] [image data] constituting the message data is retrieved when receiving the message data according to the color data reception from the receiving side fax. When the EOL signal is detected during the message data retrieval, this means that at the same time as the start of the line, the detection of the next EOL signal means the end of the line. In other words, the EOL corresponds to a signal for distinguishing between lines. In addition, by searching the code included in the header, the corresponding color of the image data can be checked, and as described above, the line number is determined using the black ID code '00'. The data recorded in the image data table are binary data of '0' or '1', which are described as black / white, blue / white, red / white, and yellow / white. After all, this is the image data for the color on the header. Using the received message data, the receiving side facsimile should decode it in the modem 18 and print it as a color document using the color printer 22. This message data processing method is the same method as described above in the description of FIG. After receiving the message data, a color line between the black lines and a group of the black lines following the color lines are recognized as the same line, and the actual one line is formed by combining the colors. This data is decoded and color printed using the color ink of the color printer.

14 is a diagram collectively showing the present invention described above. 14 is a flowchart illustrating an operation of a transmission / reception facsimile according to color transmission / reception according to an embodiment of the present invention. When the color document is transmitted from the transmitting side to the receiving side and printed in color on the receiving side recording sheet, the steps are briefly summarized, and the steps 501 to 507 are performed by the transmitting side 100, and the steps after 508 are performed by the receiving side 120. Step. In other words,

Step 501: Create a color document on the PC 110 that interworks with the sender's G3 facsimile 100.

Step 502, set the fax transmission mode. At this time, color transmission is selected through protocol communication with the receiving side.

Step 503: Separate the color document created by the PC into three colors of color and black image.

Step 504: Code the separated color or black image into binarized data.

In step 505, a color unique ID is assigned to a header of each coded color.

In step 506, the coded color data is organized into a group of the same lines together with the black data.

Step 507: Send the message data to the receiving side.

Step 508: Receive message data.

Step 509: Retrieve the header ID of the received message data and set the line.

In step 510, the received image data is decoded and transferred to the output unit.

Step 511: Print a color image on recording paper using three color inks.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention enables color transmission / reception using a general G3 facsimile multifunction device interworking with a PC and a color printer, thereby making it possible to realize an inexpensive color transmission / reception facsimile using the advantages of the multifunction device.

Claims (13)

In the method of transmitting and receiving color documents in G3 (G3) facsimile that works with PC (PC), Creating a color document using the PC; Setting a fax transmission mode after creating the color document; Separating the color document created by using the PC after setting the fax transmission mode for each color; Coding the separated image for each color into binary data; Assigning corresponding color information to the header of each coded color data; Organizing the coded color data together with the black data into groups of the same line; Transmitting the data configured as described above to a receiving side; Receiving the data at the receiving side; Searching for a header ID of the received data and setting a line of data; Decoding the received data into a color image on a set line; The color transmission and reception method of the facsimile, characterized in that the color image by printing the color image by combining the decoded color image using a color ink. The method of claim 1, The color separation process of the facsimile color transmission method characterized in that the color document consisting of a plurality of colors created by the PC to separate the three colors. The method of claim 2, The three colors are red (red), blue (blue), yellow (yellow) characterized in that the color transmission and reception method of the fax. The method of claim 1, And the line setting is to recognize a same line group of received data as one line and to give a line number. The method of claim 1, The same line group is a color transmission and reception method of the facsimile characterized in that the black data and color data lines of at least one line up to four lines. The method of claim 1, The method of transmitting and receiving a color of the facsimile is characterized in that the transmitted data configuration is [EOL] [header] [image data]. The method of claim 1, And the color information is a unique ID assigned to each of the black and three colors. In the color transmission and reception method using a G3 fax multifunction machine, Creating a color document composed of multiple colors using a PC; Setting a fax transmission mode to a color transmission mode after creating a color document using the PC; A color separation process of dividing an image of a color document consisting of a plurality of colors into three colors on a line basis; Coding a color image and a black image separated by the color separation process into image data; Assigning a unique ID to each color in a header carried in message data information sent to a receiver when transmitting the data; Organizing the coded image data for each color into groups of the same line; Thereafter transmitting the message data to a receiving side; Receiving the message data at the receiving side; Analyzing the received message data and setting a group of the same line; Color-combining the images by decoding the image data received for each of the set same lines; The color transmission and reception method of the facsimile, characterized in that the process of color printing the color combination image using a color ink. The method of claim 8, And the color transmission mode is set when the receiving side is capable of receiving color by retrieving color option information carried in the NSF signal received through the communication protocol with the receiving side. The method of claim 8, The three colors are red (red), blue (blue), yellow (yellow) characterized in that the color transmission and reception method of the fax. The method of claim 8, The same line group is a color transmission and reception method of the facsimile characterized in that the black data and color data lines of at least one line up to four lines. The method of claim 8, The same line group necessarily includes one black data regardless of whether color data is included, and the black data is always positioned at the end of the same line group to distinguish the same lines. The method of claim 8, The transmission and reception of the data data is a facsimile color transmission method characterized in that the [EOL] [header] [image data].

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