JPH04230159A - Facsimile data processing unit - Google Patents

Abstract

PURPOSE:To realize the facsimile data processing unit which discriminates whether a data sent from a host computer is a character code or an MH code word data, revises a storage area based on the discrimination result and uses the result effectively for a storage section. CONSTITUTION:When a transmission data from a host computer is a character data, the character data is converted into an image data and stored sequentially from an address 2000 of a RAM and the image data is converted into an MH code word and stored from an address 5000 of the RAM. When the transmission data is the MH code word and a receiver side facsimile equipment is not provided with a fine function, the MH code word is stored sequentially from the address 2000 of the RAM. When the transmission data is the MH code word and the receiver side facsimile equipment is provided with the fine function, the MH code word is sequentially stored from the head address of the RAM.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention inputs a character code and an MH code word, converts the character code into a modified Huffman (MH) code word and outputs the input MH code word and the converted MH code word. facsimile data that modulates and outputs
The present invention relates to a data processing device.

0002

2. Description of the Related Art A facsimile data processing device is connected to a host computer inside or outside the host computer, and converts character codes output from the host computer into corresponding MH codes. Conversion M converted into words
Outputs the H codeword or the received MH codeword to the telephone line. This type of facsimile data processing device converts character codes output from a host computer into corresponding character image data, and converts the converted image data into MH code words. There are two types of MH codewords, which receive the MH code word outputted from a host computer, modulate it, and output it to the telephone line.

The former of the conventional facsimile data processing devices described above includes a character font pattern storage section, and uses the font pattern stored in the storage section to store characters corresponding to input character codes. Convert the column into image data, store the converted image data in the first storage section, convert the image data stored in the first storage section into an MH code word, and perform the conversion. The stored MH code word is stored in the second storage section, and the stored MH code word is read out, modulated, and sent out. In addition, in the latter of the above conventional facsimile data processing devices, the input M
The H code word is modulated and sent.

0004

[Problem to be Solved by the Invention] However, according to the former of the above-mentioned conventional facsimile data processing devices,
The first part stores the image data converted from the character code.
The storage area of the storage unit and the second storage unit that stores converted MH code words are fixed within the buffer area. However, when receiving the MH code word output from the host computer, modulating it, and outputting it to the telephone line, there is no need to convert it to image data, and there is no need to store the converted image data. do not have. Therefore, if a facsimile data processing device is used for both the former and latter conventional examples, the first storage section becomes an unused area for the latter conventional example, and becomes an unused memory area. The problem arises that there are regions.

[0005] The present invention is conceived in view of the above, and
It is determined whether the character data sent from the host computer is a character code or an MH code word from the received type instruction code, and it is determined whether the character data is a character code or an MH code word. It is an object of the present invention to provide a facsimile data processing device that effectively utilizes a storage section by making the storage area variable in length by selectively changing the storage area.

[0006]

[Means for Solving the Problems] The facsimile data processing device of the present invention, as shown in FIG.
character data output from the host computer and a type instruction code for instructing the type of character data.
The receiving means 2 receives control data including the code, and the received character data is determined from the received type instruction code to character code or MH.
A determining means 3 determines whether the received character code is a code word, and when the determining means 3 determines that the received character code is a character code, it cooperates with the character font pattern storage unit 1 to convert the received character code into an image of the corresponding character.
converting means 4 for converting the converted image data into MH code words; and a storage unit 5 for storing received character data, converted image data, and converted MH code words. and,
a storage area setting means 6 for selectively setting each storage area for storing received data, image data and converted MH codewords in the storage unit 5 in accordance with the determination result of the determination means 3; It is characterized in that the MH code word stored in the storage unit 5 is modulated and then output to the telephone line.

[0007]

[Operation] In the facsimile data processing apparatus of the present invention, the control code and character data output from the host computer are received by the receiving means 2, and the received character is determined from the received type instruction code. The data is character code or MH
The determining means 3 determines whether the code word is a code word or not. Discrimination means 3
When the received data is determined to be a character code, the storage area setting means 6 sets the storage area of the storage unit 5 to an area corresponding to the character code, and stores the received data and character font pattern. The image data converted from the received character code by the conversion means 4 in cooperation with the storage unit 1 and the MH code word converted from the converted image data are respectively It is stored in a storage area set corresponding to the character code. MH by the discrimination means 3
When it is determined that it is a code word, the storage area setting means 6 sets the storage area of the storage unit 5 to an area corresponding to the case of the MH code word, and the received MH code word is set to the area corresponding to the case of the MH code word. is stored in the specified area. Therefore, the storage area of the storage unit 5 is a variable area set depending on the storage target, and the converted MH codeword and the received MH codeword stored in the storage unit 5 are modulated and output to the telephone line. Therefore, even if it is sent in character code, MH
It is also possible to deal with cases where code words are transmitted, and in each case it is possible to eliminate unused storage areas.

[0008]

[Examples] The present invention will be explained below with reference to Examples. FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. A control code including a character code and a type instruction code indicating the type of data to be sent from the host computer is input to the central processing unit 12 via the serial interface connector 11. The facsimile data processing device of this embodiment includes a central processing unit 12 and a ROM 13 in which programs are stored.
, a character font pattern ROM 14 and a RAM 15, the central processing unit 12, ROM 13, character font pattern ROM 14 and RAM 15 work together according to the program stored in the ROM 13 to perform facsimile data processing.
It constitutes a microcomputer that controls the data processing device.

The RAM 15 has an area for storing received data, an area for storing image data, and an area for storing MH code words, depending on whether the received data is a character code or an MH code word. Regions are selectively modified. The RS reception data buffer area is an area for storing character codes and control codes received via the serial interface connector 11, and the image data buffer area is an area for storing character font pattern ROM 14. The transmit data buffer area is an area for storing data obtained by converting the received character code into image data of the corresponding character.
The image data stored in the data buffer area
Areas for storing H-encoded MH codewords or received MH codewords are shown.

The MH code word stored in the transmission data buffer area is read out and modulated by the modem 16, and the modulated output by the modem 16 is sent to the network control unit 1.
7 to the telephone line, and is transmitted to the receiving facsimile machine.

The operation of this embodiment constructed as described above will be explained with reference to the flowcharts of FIGS. 3 and 4. First, variables used in the flowchart will be explained. RSRP indicates the receive buffer read pointer, RSWP indicates the receive buffer write pointer, and R
STOP indicates the receive buffer top address, RSE
ND indicates the receiving buffer end address. TX
RP indicates a transmission buffer read pointer, TXWP indicates a transmission write address, TXTOP indicates a transmission buffer top address, TXEND indicates a transmission end address, and TXPA indicates a transmission buffer pointer address. TXRP is located at the address of the contents of TXPA, TXWP is located at the address of the contents of TXPA + 2, and T
XTOP is located at the address of TXPA content + 4, and TX
END is stored at the address of TXPA contents +6.

When entering the image information transmission routine to the receiving facsimile machine, RSRP=RSWP=RSTOP=
1000, RSEND is initialized to 1999 (step S1), reception interrupts are enabled to input received data (step S2), and the character code and control code sent from the host computer are - codes, that is, received data, are sequentially stored in the RS reception data buffer area from address 1000 to address 1999 of the RAM 15 at the address indicated by RSWP. The first data of the received data is a type indication code, which in this example is a fine file command or a standard file command, and this command determines whether the received data is a character code or an MH code word. Determine. Following step S2, it is checked whether or not there is data in the RS reception data buffer area (step S3). If it is determined that there is data, the telephone number of the receiving facsimile machine is dialed. (Step S4).

[0013] Following step S4, the received data is read from the address indicated in the RSRP (step S5).
). The first received data to be read is the type instruction code. Following step S5, it is checked whether the type instruction code is a fine file command (step S6).
), when it is determined that it is not a fine file command, it is checked whether it is a standard file command following step S6 (step S7). When it is determined in step S7 that the command is not a standard file command, that is, when the type instruction code is neither a fine file code nor a standard file code, the received character data is a character code. It is determined that

If it is determined in step S6 that it is a fine file command, it is checked from the function information transmitted from the receiving facsimile device whether or not the receiving facsimile device has a fine function (
Step S8) If it is determined in step S8 that the receiving facsimile device does not have the fine function, the received data is an MH code word but the receiving facsimile device does not have the fine function. In this case, it is determined that it is necessary to filter and transmit. Filtering is performed when the resolution of the MH codeword that can actually be sent to the receiving facsimile machine is lower than the resolution of the MH codeword sent from the host computer.
Only the code word is modulated and transmitted, and the skipped raster is not transmitted.

[0015] When it is determined in step S7 that the command is a standard file command, and when it is determined in step S8 that the receiving facsimile device has a fine function, the received data is an MH code word. , it is determined that the received MH codeword can be modulated and transmitted without requiring filtering.

[0016] When it is determined that the received character data is a character code, TXRP = 5000 following step S7.
, TXWP=5000, TXTOP=5000, TXE
ND=9999, TXPA=8 (step S
9) Next, the received data is converted into image data, and the converted image data is stored in the RAM 15 from address 2000 to address 4999 in order, and the stored converted image data is read out. The MH encoded MH code word is stored from address 5000 of RAM 15 to address 9999 of RAM 15, and the converted MH code word is read out, modulated, and transmitted to the receiving facsimile machine. (Step S10).

[0017] When it is determined that the received data is an MH code word and needs to be filtered and transmitted, RSRP is incremented following step S8 (step S11), and then TXRP is incremented (step S11). =200
0, TXWP=2000, TXTOP=2000, TX
END=9999 and TXPA=8 are set (step S12). When step S11 is executed, the received data is an MH code word, and the address 100 of RAM 15 is
1 to address 1999, and then read out every other raster to store addresses 2000 to 9 in RAM 15.
The filtered MH code word is then read out, modulated, and transmitted to the receiving facsimile machine (step S13). The reason why the address 1001 of the RAM 15 is selected here is that the fine file command is stored at address 1000. In this case, the received data is an MH code word and does not need to be converted to image data, but requires filtering, so the image data buffer area is eliminated and the address 2000 of the ROM 15 is 9999 is set in the transmission data buffer area.

When it is determined that the received data is an MH code word and does not require filtering, RSRP is incremented following step S8 (step S14), and then RSEND=9999 and TXPA=
It is set to 0 (step S15). When step S14 is executed, the received data is an MH code word and does not require filtering, and the received data is from address 1001 to address 9999 of RAM 15.
The data is then read out, modulated, and transmitted to the receiving facsimile machine (step S16). In this case, the received data is an MH code word and there is no need to convert it to image data, so an image data buffer area is not set, and filtering is not required, so the received data is The RS reception data buffer area and the transmission data buffer area may be the same, and the RS reception data buffer area and the transmission data buffer area may be the same, and the RS reception data buffer area and the transmission data buffer area may be the same, and the address 1001 to 999 of the ROM 15 should be modulated and then transmitted.
Up to 9 are set in the transmission data buffer area. Here, the transmission data buffer area starts from address 1001 of the RAM 15 because the fine file command is stored at address 1000.

Therefore, in this embodiment, (1) character code reception, (2a) MH code word reception and the receiving facsimile apparatus does not have a fine function, (2b) MH code word reception In each case, the address of the RAM 15 is specified as shown in FIG. 5, and the RS reception data where the reception data is stored is determined. Each area is set: a buffer area, an image data buffer area where image data is stored, and a transmission data buffer area where MH code words are stored. This set state is schematically shown in FIG. 6, and when the reception code is an MH code word, the transmission data buffer area becomes large, and the above (2a) and (2b)
Even in this case, there will be no unused area.

[0020]

As explained above, according to the present invention, control data including character data output from a host computer and a type instruction code indicating the type of character data can be received. Then, it is determined from the received type instruction code whether the received character data is a character code or an MH code word, and when it is determined that the received character data is a character code, the storage area of the storage unit is set to the character code. Converted image data and converted image that are set in the area corresponding to the received character code and character font pattern to convert the received character code to the corresponding character image data. - Store the MH codewords converted from the data in the storage areas set corresponding to the case of character codes,
When it is determined that it is an H codeword, the storage area of the storage unit is set to the area corresponding to the MH codeword, and the received MH codeword is M.
Since the converted MH code word stored in the storage unit and the received MH code word are stored in an area set corresponding to the case of the H code word and output to the telephone line after being modulated, the received character data It is set in the storage area for character code and MH code word, and it is set in the storage area for both character code and MH code word. Unused storage area can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of an embodiment of the present invention.
It is a chart.

FIG. 4 is a flowchart for explaining the operation of an embodiment of the present invention.
It is a chart.

FIG. 5: RAM used to explain the operation of one embodiment of the present invention.
FIG. 2 is an address setting diagram.

FIG. 6: RAM used to explain the operation of one embodiment of the present invention.
FIG.

[Explanation of symbols]

1 Character font pattern storage section 2 Receiving means 3 Discrimination means 4 Conversion means 5 Storage section 6 Storage area setting means 11 Serial interface connector 12 Central processing unit 13 ROM 14 Character font pattern ROM 15 RAM 16 Modem 17 Network Controller unit

Claims (1)

[Claims] [Claim 1] Receives control data including a character font pattern storage unit, character data output from a host computer, and a type instruction code for instructing the type of character data. a receiving means, a discriminating means for discriminating whether the received character data is a character code or an MH code word from the received type instruction code, and a character font pattern when the discriminating means determines that the received character data is a character code. The received character code is
a conversion means for converting the code into image data of a corresponding character and converting the converted image data into an MH code word; a storage unit for storing received data, and a storage unit for storing received data,
storage area setting means for selectively setting storage areas for storing image data and converted MH code words respectively according to the determination result of the determination means; A facsimile data processing device characterized by outputting to a telephone line.