JPH0546135B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of the Invention> The present invention relates to a data communication device, and more particularly to a data communication device capable of transmitting image data and character code data to a partner communication device.

<Prior art> Conventionally, a facsimile device having an image data processing function communicates image data with another facsimile device having the same image data processing function, and also a facsimile device having a character code data processing function. A character processing device having this function communicates character code data with a character processing device having the same character code data processing function.

However, in this case, only either character code data or image data can be communicated, so the device is equipped with a communication function for character code data and image data to enable communication of character code data and image data. Devices have been proposed to improve efficiency.

However, in this case, communication cannot be performed unless there is a communication function for character code data and image data between the sending and receiving devices, and even if the sending device is capable of communicating character code data and image data, However, there was a drawback that communication could not be performed if the receiving side was a facsimile machine.

<Purpose> The present invention is intended to eliminate the drawbacks of the prior art described above, and is to provide a data communication device capable of transmitting image data and character code data, in which the other device has a processing function for character code data and image data. In this case, character code data and image data can be efficiently communicated, and character code data and image data can also be transmitted as image data even when the other party's communication device is a facsimile device. .

<Embodiment> FIG. 1 is a block diagram of an embodiment according to the present invention. 1 is a microprocessor, and 2 is an address bus, which specifies the address of each I/O memory. A data bus 3 is a bidirectional bus used to transfer various data. Reference numeral 4 denotes a control bus, which is used for reading/writing the memory, etc., accepting interrupts, transmitting data set timing, etc. Reference numeral 5 denotes a keyboard having alphabet keys, hiragana keys, katakana keys, cursor keys, monitor line cursor keys, and the like.

6 is a keyboard controller. The keyboard controller 6 encodes data input from the keyboard 5 and sends an interrupt signal to the control bus 4. A CRT controller 7 controls a CRT device 8, a character generator 9, a refresh memory 10, and a refresh memory controller 11. 8 is
It is a CRT device that can display a display similar to that of a normal television.
Reference numeral 9 denotes a character generator which sequentially outputs the line pattern of the character pattern by inputting a code such as a line address of the character code character pattern. 10 is a refresh memory;
Stores the character code to be displayed on the CRT device 8,
The character code is repeatedly output according to display instructions from the CRT controller 7. 11 is a refresh memory controller, which is a CRT
It controls the refresh cycle for CRT display and the writing and reading from the microprocessor 1 according to instructions from the controller 7.

12 is a read-only memory (hereinafter referred to as ROM) which stores the control procedures shown in Figures 2-A, 2-B, 3-A, and 3-B, and also stores various processing means. 13 is a controller for the ROM 12; 14 is a random access memory (hereinafter referred to as RAM), which is used for temporary storage of various data. For example, it has a sentence buffer 14-A for storing input sentences, a transmitting data code buffer 14-B, a receiving code buffer 14-C, and the like. 15 is a RAM controller. 16 is a floppy drive device, and 17 is a controller for the floppy drive device 16. 18 is a dot printer;
9 is a printer controller. 20 is a start-stop type data communication controller (hereinafter referred to as
ADC), which transmits and receives coded data. 21 is a unit that performs frequency switching modulation of the serial data created by the ADC 20 (hereinafter referred to as
(written as MODEM). 22 is a conversion unit (hereinafter referred to as FXMD) that converts to a facsimile signal and converts the facsimile signal to a pattern signal.
It is. 23 is a network control unit (hereinafter referred to as NCU)
It controls dial signal generation, line connection, etc. 24 is the NCU 23 and MODEM 21 or
It is a switch that connects between FXMD22 and
MODEM21 according to instructions from microprocessor 1
or FXMD22 is selectively connected.
25 is a dial controller which sends dial data to the NCU 23 when calling a partner station.

This character processing device is operated by input from the keyboard 5, and when an input is made from the keyboard 5, an interrupt signal is transmitted to the microprocessor 1. As a result, various controls are performed according to the control procedures stored in the ROM 12.

The operation will be explained below with reference to the drawings.

As mentioned above, when data transmission is instructed from the keyboard 5, the microprocessor 1 reads the ROM 12.
Start the operation by following the steps in. In step 1 of FIG. 2-A, the dial controller 25 sends the number of the partner station to the NCU 23 and performs automatic dialing to call the partner station. Note that the switch 24 is connected to the MODEM 21 side in the initial state. In step 2, via ADC20 and MODEM21
Communication start processing is performed according to the procedure stored in the ROM 12.

In step 3, it is determined whether the other party connected in steps 1 and 2 is a facsimile machine or a word processor. If neither of these is the case, error handling is performed in step 4. If the other station is a word processor, the data in the transmission code buffer 14-B is checked in step 5 to determine whether the data to be transmitted is a character code or pattern information. In the case of a character code, the character code is sent to the partner station in step 6, and the process moves to step 7. On the other hand, in the case of pattern information, the data in the transmission code buffer 14-B points to the corresponding pattern in the character pattern buffer 14-F, and in step 8, the transmission identification code of the pattern signal is transmitted. Notify the other station that the message will be transmitted. Next, in step 9, the character pattern in the character pattern buffer is transmitted. It goes without saying that this pattern may be a figure. Next, as shown in step 10, a pattern end signal is output to notify the end of pattern transmission. In step 7, it is determined whether the transmitted data is the last data, and if it is not yet transmitted, the process returns to step 5 and the same processing as described above is performed. If it is the last, the procedure for ending the transmission is performed in step 11.

On the other hand, when it is detected in step 3 that the other station is a facsimile device, the switch 24 is switched to the FXMD 22 side in step 12, and the character pattern specified by the transmission code buffer 14-B is transferred to the character in the ROM 12A in step 13. Extract the pattern or character pattern buffer 14-F and convert it into a signal for facsimile transmission and send it to FXMD.
22, the data is transmitted in step 14. Next step
At step 15, unless it is the end of the data, the process returns to step 13 and the same processing as described above is performed. If it is the end of the data, switch 24 to MODEM 21 in step 16.
Return it to the side and perform the procedure to end the transmission in step 17. Transmission to a facsimile device or other character processing device is performed by the procedure described above.

On the other hand, when a communication is received from another facsimile device or character processing device, the process goes to step 20 in Figure 3-A, where it is determined whether the other party is a facsimile device or a character processing device, and other communication is performed. If so, error processing is performed in step 21. In the case of a character processing device, a check is made in step 22 to see if the signal from the other party is a transmission end signal, and if it is, a reception end process is performed in step 23. In other cases, check in step 24 whether the received data is a character code or pattern transmission identification code, and if it is a character code, proceed to step 25.
and receive code buffer 14-C as is.
Put it in. If it is a pattern transmission identification code, the pattern is numbered in step 26, and the number designates a vacant area in the character pattern buffer 14-F, and the number code is placed in the receiving code buffer 14-E. Next step
At step 27, the received pattern information is put into the empty area of the character pattern buffer 14-F designated by the above number, and the process returns to step 22 to perform the same processing as described above.

On the other hand, if it is detected in step 20 that the other party is a facsimile device, the switch 24 is switched to the FXMD 22 side in step 28.It is checked in step 29 whether the process is finished or not, and if it is finished, the switch 24 is returned to the MODEM 21 side in step 30. step
31 performs reception end processing. If the process is not completed, the received facsimile signal is converted into pattern data in step 32 and placed in a reception pattern buffer, and in step 33 it is decomposed into patterns corresponding to character positions. That is, to illustrate, when an image as shown in FIG. 4 is restored from a facsimile signal, it is decomposed into parts shown by dotted lines, each section is numbered at step 34, and this number is assigned at step 35.
Enter the code into the receiving code buffer. As described above, the facsimile signal is restored to an image, further decomposed, coded, and placed in a receiving code buffer. When this information is printed by the printer 18, an image can be printed in dots using a routine similar to that used when printing characters. That is, when printing data in the received code buffer, if it is a character code, the pattern corresponding to the character code is extracted from the character pattern 12A and output to the dot printer, and if it is a pattern number code, the corresponding pattern is selected from 14-E or 14-F. Take it out and print it out on a dot printer.

<Effects> As explained above, according to the present invention, in a communication device capable of transmitting character code data and image data, if the other party device has a processing function for character code data and image data, The structure allows transmission of character code data and image data according to the data, and communication efficiency can be greatly improved.

Furthermore, if the destination device is a facsimile device, the configuration is such that it can be transmitted as image data regardless of whether the data to be transmitted is character code data or image data, thereby ensuring reliable data communication to the facsimile device. In addition, by making it possible to communicate with facsimile devices, the communication range can be greatly expanded.

Furthermore, while conventional devices capable of transmitting character code data and image data required identification data to indicate the type of data when transmitting each data, the present invention allows the other device to be identified as a facsimile device. In this case, unnecessary data transmission can be prevented by eliminating the need for identification data that is used when transmitting different data, and the other device can be identified as a device capable of processing character code data and image data. By transmitting the identification data, it becomes possible to easily and accurately process the data of the other device.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2-
FIGS. A and 2-B are flowcharts of the transmitting operation, FIGS. 3-A and 3-B are flowcharts of the receiving operation, and FIG. 4 is a pattern decomposition explanatory diagram. 20...ADC, 21...MODEM, 22...
FXMD, 23...NCU.

Claims (1)

[Scope of Claims] 1. A data communication device capable of transmitting image data and character code data to a partner communication device via a communication line, comprising: an image data processing means for processing the image data; and an image data processing means for processing the character code data. character code data processing means for identifying the data processing function of the other party's communication device; second identification means for identifying the type of data to be transmitted; and the first identification means. When the other communication device is identified as a facsimile device having an image data processing function, the character code data and image data are transmitted as image data, regardless of whether the data to be transmitted is character code data or image data. a first transmitting means for transmitting data to be transmitted; and when the first identifying means identifies the other communication device as a device having processing functions for both character code data and image data, the second identifying means identifies the data to be transmitted; An identification indicating that if the type of data is identified as character code data, character code data is transmitted, and if the second identification means identifies the type of data to be transmitted as image data, image data is transmitted. A data communication device comprising a second transmitting means for transmitting data and image data.