JPS6110363A - Facsimile picture converting device - Google Patents

Abstract

PURPOSE:To reduce the coding time by coding a character code into facsimile data though parallel processing of plural lines' share of the codes while the code is converted into facsimile original picture information to eliminate the need for a memory storing the original picture information. CONSTITUTION:The character code from a host processing unit 201 is received by a host interface section 202 of a facsimile picture converter 200, the host interface section 202 gives the character code to a character code reception section 204 of a coding section 203 and the character code reception section 204 outputs the character code to a facsimile original picture information generating circuit 205 at each character. The facsimile original picture information generating circuit 205 reads the facsimile original picture information corresponding to the character code and outputs sequentially the data corresponding to one digit's share to a change picture element detection circuit 206.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a 7-axis image conversion device, and more specifically, it converts a character code into facsimile original image information and converts the facsimile original image information into a 7-axis image conversion device specified in T4 of the CICITT recommendation. The present invention relates to a facsimile image conversion device that encodes facsimile data using a coding method that uses

7. Explanation of Prior Art Conventionally, this type of facsimile image conversion device converts the character code for one line into a number of bits equal to (number of dots in the main scanning direction) x (number of main scanning lines in the sub-scanning direction). Convert to facsimile original image information and convert here to nine facsimile IJ
The original image information is stored in the -H memory, and the facsimile original image information is retrieved from this memory for each main scanning line and encoded, and this is stored for the number of main scanning lines in the sub-scanning line direction. It is converted into facsimile data by sequentially repeating the process. Therefore, in order to store the facsimile original image information corresponding to one line of character code as its bit pattern, a memory of several tens of kilobits is usually required. For each line, the edges are turned back by the number of lines in the sub-scanning line direction, and then taken out from the memory and encoded, which has the disadvantage that the encoding process takes a long time.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional circumstances.
Therefore, it is an object of the present invention to provide K,
Simultaneously converts the number of lines of multiple main scanning lines, converts the facsimile original image information of multiple lines from the character code and passes it to the encoding circuit each time, and encodes the facsimile original image information of multiple lines at the same time. Then, Totoyo p1 is a new technology that solves the above drawbacks, eliminates the need for memory to store facsimile original image information corresponding to one line of character code, and shortens the encoding processing time. An object of the present invention is to provide a facsimile image information conversion device.

SUMMARY OF THE INVENTION In order to achieve the above object, a facsimile image conversion device according to the present invention converts facsimile data to be sent from a G1 facsimile terminal according to the JTT recommendation into a facsimile image of a character corresponding to the character code from a character code. When converting to original image information and encoding this 7-axis original image information using the encoding method specified in T4 of the C0ITT recommendation, 2-axis +
) In order to simultaneously process the original image information for multiple main scanning lines in parallel, convert multiple lines from character codes to facsimile original image information at the same time, and convert the facsimile original image information for those lines each time. It is characterized in that it is simultaneously encoded into facsimile data.

DETAILED DESCRIPTION OF THE INVENTION Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of the size of facsimile original image information when a character code is converted into facsimile original image information by the facsimile image conversion apparatus according to the present invention. In this example, the number of dots in the main scanning line direction is 2048 dots, which corresponds to the JIS 94 size, and the number of main scanning lines in the sub-scanning direction is set as Saeline. In the following explanation, this first
This will be explained using facsimile original image information as an example in the figure.

FIG. 2 is a block diagram showing an embodiment of a facsimile image conversion apparatus according to the present invention. Referring to the same figure,
The character code from the upper processing bag * 201 is converted into a facsimile image conversion device @ 200's upper interface part 202
Then, the upper processing unit 202 passes this character code to the character code receiving unit 204 of the encoding unit 203, and the character code receiving unit 204 converts this character code into an original image by a factor ξ for each character. It is output to the information generation circuit 205. The facsimile original image information generation circuit 205 reads out the facsimile original image information corresponding to this character code, and generates data 301, 302, . . . 324 corresponding to one digit of the facsimile original image information shown in FIG.
The changing pixel detection circuit 206K outputs one after another in this order. In the example described here, the facsimile original image information corresponding to one line of character code is divided into three main scanning lines in the sub-scanning line direction and processed every eight lines. The facsimile original image information 301 , 302 , . . . , 324 output from the original image information generation circuit 205 to the changed pixel detection circuit 206 is data in units of 8 bits. Next, the changed pixel detection circuit 206 sequentially compares the pixels of each line of the facsimile original image information 301, 302, . , give its changing pixel position.

The encoding mode is determined from the changed pixel data using the encoding method specified in T4 of the AC Engineering TT Recommendation, and facsimile code data is extracted line by line from the encoding mode and the changed pixel data. , this is repeated nine times until the last character of one line's character code is encoded. Subsequently, a 1cEOL code is added after the final facsimile code data of each line to complete the operation of creating facsimile data for 8 lines. The above operation is similarly performed for every 8 lines for the remaining 916 lines, thereby completing the operation of creating facsimile data for all lines.

In this way, the facsimile data created by the changed pixel detection circuit 206 is transferred to the factored data output unit 207, where the facsimile data is edited into byte data of every 8 bits and sent to the upper level. The data is transferred to the upper processing device 11201 via the interface unit 202.

These are a series of conversion operations from character codes to facsimile data in the facsimile image information conversion device.

Next, the facsimile which constitutes an essential part of the present invention)
Original image information generation circuit 205 and changed pixel detection circuit 206
The operation will be explained.

FIG. 4 is a circuit configuration diagram showing the configuration of a facsimile original image information generation circuit. Character code receiving section 204 in Fig. 2
The character code from is input to a character code-character address conversion circuit 401 in FIG.

The character code to be input at this time uses the J Engineering S code (first byte, second byte) specified in J Engineering SO6266. The character code-character address conversion circuit 401 converts facsimile original image information into a standard kanji character generator (μPD 24256-Y10 to Y18).
:24 dots x 24 dots), the conversion operation from character code to character address as shown in FIG. 5 is performed. The character generator circuit 402 is a character code-character address conversion circuit 40
The facsimile original image information corresponding to character addresses starting from 1 is read out and output every 8 bits in a bit format as shown in FIG.

FIG. 6 is a circuit configuration diagram showing the configuration of the changed pixel detection circuit 206 in FIG. 2. The facsimile original image information output from the facsimile original image information generation circuit 205 in 8-bit units as described above is 301, 3 in FIG.
02, . . . 324 is input to the first pixel data back 7601 in FIG. Similarly, when the facsimile original image information generating circuit 205 shown in FIG. 2 outputs the 7-axis original image *great information, the strobe signal thereof is output. This strobe signal is the 6th strobe signal.
A dot number counting circuit is used as a sample signal for data latching of the first pixel data buffer 601 and second pixel data buffer 602 in the figure, and simultaneously counts the number of dots in the main scanning line direction using the strobe signal. 60
Used for 30 count pulses. Here, when the pixel data 301 shown in FIG. 3 is input to the changed pixel detection circuit as the first data, the first pixel data buffer 7 shown in FIG.
601K is set with the pixel data 301, and the dot number count value of the dot number counting circuit 603 becomes 11''.Subsequently, when the pixel data 302 shown in FIG. 3 is input, the first pixel data of FIG. Back 7601 K The data of 301 that had been set up to that point is moved to the second pixel data buffer 602, and the data of 301 is moved to the first pixel data buffer 601.
Data of 02 is set. At the same time, the dot number count value of the dot number counting circuit 603 becomes 12''.Then, since the bit corresponding to the pixel data 302007 has the pixel color 1'', the first pixel data buffer 601
The 8th bit is data 1 for pixel color 1 "Kit@m"
1" is set, and the data "0'" corresponding to the 8th bit pixel color 1 white "K" of #I2 pixel data back arrow 02
When compared with K, there is a mismatch and the pixel color has changed.

This is outputted from the comparison circuit 604 to the encoding register group circuit 605 as a changed pixel detection signal of the line corresponding to the 8th bit (eighth line). At this time, the encoding register group circuit 605 inputs the dot number count value "2" of the second pixel data buffer 603 at that time into the register corresponding to the eighth line using the changed pixel detection signal from the comparison circuit 604 as a sample signal. set.

By repeating the above operations, each time a changed pixel is detected, the dot count count value at that time is sequentially set in the corresponding register of the encoding register group circuit 605 as changed pixel data.

Next, the configuration of the encoding register group circuit 605 will be explained. Note that the facsimile data encoding method used here is 2 specified in T4 of the OCI'l'T Recommendation.
This will be explained by taking the dimensional coding method as an example, and further taking as an example the case where the resolution is at least -4. therefore,
Here, the encoded facsimile data is structured such that a synchronization line (X line) is one-dimensionally encoded, followed by three lines of two-dimensionally encoded data. In addition, 1
In the case of the dimensional coding method, all lines are one-dimensionally coded, so assuming that only the above-mentioned X lines are continuous, and the resolution is standard resolution, that is, p K =-
In the case of 2, assuming that one line of two-dimensional code follows the X line, both of them are equivalent to the high resolution example of the two-dimensional encoding method described above, so here,
The explanation will be omitted.

There are five pieces of changed pixel data as shown in FIG. 7 that are necessary for encoding using the two-dimensional encoding method. In the figure, al) is the reference or origin change pixel on the encoding line, al is the first change pixel to the right of pixel a0 on the encoding twin, and 512 is the first change pixel to the right of pixel a on the encoding line. The changed pixel, bl is the first pixel on the right of the changed pixels on the reference line that has the opposite color to the pixel ao, and b2 is the first changed pixel to the right of the changed pixels on the reference line. . Therefore, the encoding register group circuit 605 is composed of registers that set the above-mentioned five data corresponding to each encoding line, and the registers corresponding to the lines are two registers necessary for one-dimensional codes. The configuration is as shown in FIG.

Next, when the changed pixel data of each line is set in the encoding register group circuit 605 in FIG. It is determined whether the condition is satisfied, and if the condition is satisfied, an encoding mode corresponding to the encoding mode setting condition is set. This setting method will be explained with reference to FIG. Note that the encoding mode at this time is 1 of the line.
Dimensional encoding mode and encoding line bus mode, horizontal mode, and vertical mode are different, each setting condition is 0O
It follows the provisions of rTT recommendation τ4. FIG. 9 is a circuit diagram showing a specific example of the encoding mode setting circuit 606 of FIG. 6. However, since the X-line one-dimensional code mode setting circuit simply outputs a change pixel detection signal on the line, it is omitted from illustration in FIG. 9 and from the following explanation. In addition, here the acid n2-th (n-2,3,
The setting of the encoding mode of the encoding twin of 4, 6, 7° 8) will be explained. First, input data to the encoding mode setting circuit will be shown. First, change pixel data of each register of the n-th line from the encoding register group circuit is converted into "nao + Lnal 1."na2 + Ln.
k+1 + "nb2. The second one is to check whether changed pixel data is set in each of the registers from the encoding register group circuit 605, LnaOF, LHa18F.

LOa28F, bnbjslF, LHb2SF
Enter as . Among these inputs, first, the 9th
The values of comparison circuit bna1 and Lnbl of 901 in the figure are compared. As a result, if L11a1 is greater than Lnt)2, the bus mode setting condition has been met (7!).
LnaQ8F with AND circuit of kD and 902.

bnalsy, LHbl"' + TJrlb2nd F, and Lnao+Lla1+Lnbl
It is confirmed that changed pixel data is set in each register of +Lnb2, and the C0DP signal is output as a bus mode output in synchronization with the internal clock OLK. Before, the comparison result of the comparison circuit 901 is Lnal ”L
nt) 2 or Lnt11 < Lnb2 ``t'' If there is 1, it means that it is either horizontal mode or vertical mode. Therefore, determine whether it is horizontal mode or vertical mode by the value of Ln5Lj l Ln') 1. Determination is made as follows.The value of Lnt)1 is subtracted from the value of beat 1 in the subtraction circuit 903, and the result of the subtraction is
The determination is made using the AND circuit 905 and the OR circuit 906.

The AND circuit 904 outputs K"l" when the subtraction result of the subtraction circuit 903 is -3, -2°-1, and the AND circuit 905 outputs K"l" when the subtraction result of the subtraction circuit 903 is 0. +1. +2° +3, it outputs @1″. Therefore, the OR circuit 9
If "1" is output from 06, the subtraction result of the subtraction circuit 903 is -3 to +3, i), and the absolute value of LnaOLnbl is 3 or less. This means that the vertical mode setting conditions are met, and the con v signal is output as the vertical mode output in the same manner as in the bus mode described above. Also, at this time, the lower 3 bits of the output of the subtraction circuit 903 are added by +3 in the adder circuit 907, decoded by the decoder circuit 908, and the output is set in the flip-flop circuit 909 by the OOD V signal, so that the output of the subtraction circuit 903 is Identify whether the output is between -3 and +3 and set the vertical
Type of code vL(3) ”L(2) ”L(1) #v
(0) "R(L), VH(I2), vR(3) to 0
Output at the same time as ODV. This type of vertical mode is
If the output from the 001 circuit 906 used when setting the factor-extracted code data in the code extraction circuit 607 in FIG. 6 is @0'', the subtraction result of the subtraction circuit 903 is
If the absolute value of Lnao-Lnb is less than or equal to +4 or more than 3, then the horizontal mode setting condition is met.Then, the output of AND circuit 902 is connected to the output of AND circuit 910, and Lnb28F is set. The following conditions are added, and the OODH signal is output as the horizontal mode output in the same manner as in the pass mode. Also, at this time, 91
In the subtraction circuit of 1 and 912, the value of Lna, -anao,
Calculate the values of Lna, -Lna, and use the results as OO
These values are used when factor-cut code data is set in the code extraction circuit 607 of FIG. 6.

Through the operations described above, the encoding mode setting circuit 606 in FIG. 6 sets the encoding mode. The encoding mode set as described above and other data and the changed pixel data from the encoding register group circuit 605 in FIG. 6 are sent to the code extraction circuit 607 in FIG.
The facsimile code data is extracted for each line and set in a facsimile code data buffer for each line. The code extraction circuit 607 repeats these operations every time it receives the encoding mode signal from the encoding mode setting circuit 606 to create facsimile data, and converts it into facsimile data of 7-axis original picture information corresponding to the final character code. When the encoding is completed, the encoded facsimile data is transferred to the facsimile data output unit 207 in FIG.

Effects of the Invention As described above, the present invention accumulates facsimile original image information by converting character codes into facsimile original image information and simultaneously encoding multiple lines into fax data through parallel processing. Since no memory is required, the time required to encode facsimile data can be significantly shortened, and processing in the facsimile image conversion apparatus can be made more efficient.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the size of facsimile original image information, FIG. 2 is a block diagram showing an embodiment of a 7-axis, 1-width exchange device according to the present invention, and FIG. 3 is a diagram showing bits of facsimile original image information. A bit configuration diagram showing an example of the configuration, FIG. 4 is a circuit configuration diagram showing the configuration of the facsimile original image information generation circuit in FIG. 2, and FIG. 5 shows the characters in the facsimile IJ original image information generation circuit in FIG. A circuit diagram of the code-character address conversion circuit, FIG. 6 is a circuit diagram showing the configuration of the changed pixel detection circuit in FIG. 2, and FIG.
A reference diagram showing the definition of changed pixel data necessary for two-dimensional encoding in the two-dimensional encoding method specified in ITT Recommendation I4. Figure 8 shows the registers of the encoding register group circuit in Figure 6. A configuration diagram showing the configuration, Figure 9 is the 6th
FIG. 2 is a circuit configuration diagram showing the configuration of an encoding mode setting circuit in the figure.

Claims (1)

[Claims] GI according to the recommendations of the International Telegraph and Telephone Consultative Committee (CCITT)
I Convert facsimile data to be sent to a high-speed facsimile terminal from character code data to facsimile original image information of the character image corresponding to the character code, and convert this facsimile original image information into T
In order to simultaneously process multiple main scanning line segments of facsimile original image information in a facsimile image conversion device by encoding it using the encoding method specified in Section 4 in parallel, multiple main scanning line segments are simultaneously processed from character codes to facsimile data. It is characterized by comprising means for converting into original image information, and parallel processing encoding means for simultaneously encoding the main scanning line segments from the facsimile original image information into facsimile data each time it is converted into facsimile original image information. A facsimile image conversion device.