JPS6016757A - Document transmission system - Google Patents

Abstract

PURPOSE:To transmit a document formed by a word processor to a remote location by converting a picture signal of a document outputted from the word processor into a picture signal having a line density suited to the facsimile device, and inputting the result to a facsimile device. CONSTITUTION:After the picture signal of the document outputted from the word processor 21 is subject to the line density converting processing in the main scanning direction and in the sub-scanning direction by a line density converter 22, the result is transmitted to the facsimile device at a remote location through a communication line 24 by the facsimile device 23. The line density converter 22 applies the line density converting processing where a bit is added at each prescribed number of bits and a picture signal of one line is added at each prescribed number of lines.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a conventional example of the 111 transmission power type for transmitting text created with a word processor by facsimile communication and its problems. FIG. 2 is a schematic block diagram. In this figure, 1 is the main body, which is composed of a microprocessor, memory, etc. 2 is a key that must be operated by the operator, 15 is an input device, and 3 is a program or created statement 1! ), etc., is a frontage storage device. 4 is a nice play device, and 6 is a printer installed.

When transmitting text created with such a word processor to a remote location, conventionally the document is printed once using a printer device 6, the printed text is input into a facsimile device, and then transmitted to the remote location via facsimile communication. The method is generally adopted. However, with this method, a high-quality document created with a word processor is read again by the reading unit of the facsimile machine, so due to the resolution limit of the reading unit and the skew of the document, the quality of the transmitted document (image quality, etc.) deteriorates to.

As an example, a document = 1 - straight line printed by a word processor printer (dot spacing 1/160 inch) is printed by a fan/millimeter reading unit (WC resolution 8 dots/square).
The case of reading will be explained with reference to FIG.

In FIG. 2(a), 1o is a dot printed by a printer, 11 is a scanning line of the printer, and 12 is a scanning line of a reading unit. When a document is read tilted by an angle φ in this manner, in each scan line 12, the image is sampled at the position indicated by the black circle. Therefore, the straight line (row of dots 1o) shown in FIG. 2(&) is reproduced as an image as shown in FIG. 2(b) in the receiving facsimile machine.

In other words, the thickness of the straight lines becomes uneven and the image quality deteriorates.

In order to reduce the deterioration in image quality as described above, a method has been proposed in which a word processor and a facsimile device are directly connected via a cable, and the image signal of a document to be sent to a printer device is directly sent to the facsimile device for transmission. However, this method has a problem in that the transmitted text p1° is reduced in size from the original document. The reason for this is that the dot spacing of word processor printers is 1/160.
An example will be explained in which the resolution of the facsimile machine is 8 dots/home. In this case, the A4 size (210mm x 297mm) output from the word processor
) The amount of information in the image signal of the document is 1323 bits per line, but the amount of information per line in the facsimile machine is 1680 bits. Therefore, the transmitted image signal for each line of the cup has a 357 bit white bit string added to the effective 1323 bits. Although this applies to the main scanning direction, the same applies to the sub-scanning direction, and as a result, the above-mentioned reduction problem occurs. For example, there are 24 kanji in a document created with a word processor.
If the body size is 24 x 24 dots, if printed on a printer, the font size will be 3.81 x 3.81 mm, but on a transmission document it will be 3 x 3.
The font size is 1 mm, and the surface precision ratio is 62%, making it extremely difficult to read.

In order to avoid such problems, a method has been developed in which a word processor sends a character code instead of a document's image signal to a facsimile machine, the character code is converted to a document within the facsimile machine, and the document's image signal is generated and transmitted. can also be considered. However, the phono size of a facsimile device must generally be about 32 x 32 bits, and in the case of special characters or graphic fonts that are not yet available in text files, it is necessary to transfer the font pattern from the word processor to the facsimile device in advance. New problems arise, such as increasing equipment costs and complicating procedures.

Purpose of the Invention The present invention solves the above-mentioned problems, and is capable of transmitting a document created with a word processor to a remote location using an existing facsimile machine without deteriorating the image quality or changing the font size. The purpose of this document is to provide a document transmission method that allows for

Structure of the Invention The present invention connects a word processor and a facsimile device via a density conversion device, and adds bits every predetermined number of bits to an image signal of a document outputted from the word processor by the density conversion device, The above purpose is achieved by applying density conversion processing to add one line of image signal for every predetermined number of lines, and inputting the image signal after this density conversion processing to a facsimile machine. be.

Explanation of the bundle fist example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a system diagram of a document transmission system according to an embodiment of the present invention. In this figure, 21 is a word processor. This word processor 21 has a general configuration as shown in FIG. 1, and converts the information of the created A4 size document into an image signal (1323 bits per line) suitable for a dot printer with a dot spacing of 17160 inches. It has a function to output as . 22 is a cotton density converter, and 23 is a facsimile machine. word processor 2
The image signal of the document output from 1 is sent to the cotton density converter 22.
After performing the cotton density conversion process in the main scanning direction and sub-scanning direction as described later, the facsimile machine 23
is transmitted to a facsimile machine at a remote location via the communication line 24. The facsimile machine 23 is similar to the conventional one that transmits an A4 size image with a resolution of 8 dots.

FIG. 4 is a diagram showing an example of the cotton density converting device 22. As shown in FIG. In this figure, 31 is an input terminal for both signals, and 32 is an input terminal for both signals.
33 is the input terminal of the synchronized clock for both signals, and 33 is the output terminal A of confidence > 3 after the density conversion process.

34 is a 1323-bit shift register, 36 is a bit counter, 35 is a bit counter, 36 is a judgment circuit, 3
7 is an additional bit generation circuit, 38 is a +JJ conversion switch, and these are detailed 1, i'j conversion processing JJj in the main scanning direction.
'fCII is formed t1η. 39 and 40 are 1.1680-bit shift registers, 4 1 (r
i) Monthly 1 line Ushinari circuit, 4 2 1 43/-19
A conversion switch 44, a line counter 46, and a determination circuit 46 constitute a fabric density conversion processing section in the sub-scanning direction.

Next, the operation will be explained.

An A4 size image signal (1323 bits per line) is transferred from the i-node processor 21 (Fig. 3) to the input terminal 31 in real time, and is sequentially fetched into the shift register 34 at the timing of the image signal synchronization clock. Well, 77 tones are gone. It is now assumed that both signals of one line are stored in the shift L-+nodisk 34, and these two signals are sequentially output from the shift L/register 34 starting from the first bit by means of a synchronized clock. The bit counter 35 counts both signal synchronization clocks, and its value d indicates the bit number of the image signal output from the shift register 34. Since the changeover switches 3B, 42, and 43 are normally set to the side shown in the figure, the output image signal of the shift register 34 is transferred to the shift register 39 via the changeover switches 38, 42, or is transferred to a predetermined position. The changeover switch 38 is temporarily switched to the additional bit/node generation circuit 37 side for each number of bits, and the additional bits output from the additional bit generation circuit 3γ are transferred to the shift register 39.

The determination circuit 36 performs such switching control of the Q switch 38. In this embodiment, the power is 13 per line from 21 to 13
The bits are converted into a 23-bit image signal in a powerful 11 bits, and the image quality of 168 bits is meticulously converted into a bow.

The ratio of additional bits to 1323 bits is 3:1
0, it is necessary to add 1 bit to every 3 bits or 4 bits 4+J.The decision circuit 36 checks the value of the bit counter 36 and outputs 3 pins l- from the shift) register 34. 4-bit picture 1-. Each time +3 is output, the - selector switch 38 is turned to -++. It outputs a signal for switching the additional bit generation circuit 37 to 1til+.

FIG. 5 shows an image signal that has been subjected to the gutter addition operation as described above, that is, the density conversion process in the main scanning direction. In this figure, white circles indicate bits of the image signal output from the fd herring register 34, and hatched circles indicate additional bits.The image signal after such density conversion processing is output from the shift register 39. is accumulated in

FIG. 6 is an explanatory diagram of an algorithm for generating additional bits. As shown in (al) of this figure, bit 1 and bit (i+
As the bits to be added during 1), the additional bit generation circuit 37 generates an additional bit of the value shown in fb) in the same figure. In other words, it is the logical sum value of the value of the additional value 1 and the bits before and after it.

Referring again to FIG. 4, the operation of the cotton density conversion processing section in the sub-scanning direction will be explained. Normally, the changeover switches 12 and 43 are set to the side shown in the figure. Therefore, shift register 3
9 (image signal after density conversion processing in the main scanning direction, the number of bits per line is 1680)
bit) is transferred to the shift register 4 via the changeover switch 43.
Completed transfer to 0, output 4 child 3 from this shift register 4Q
I can output to 3.

The density conversion in the sub-scanning direction is performed by inserting one line of image signal (1680 pinots) every predetermined number of lines. In this example, the word processor 2
Since the ratio of the number of lines of the image signal output from 2 and the number of lines added thereto is 37:10, it is necessary to generate and insert one line of both signals every four lines across three lines. The changeover switch 42.43 51i
A line counter 44 and a judgment circuit 46 are used for the purpose of 1J control.
is provided. The line counter 44 counts the carry output of the pin 1 counter 36, and its value indicates the line number of both signals transferred to the shift register 39. The determination circuit 46 checks the value of the line counter 44, and every time the image signal of 3 or 4 lines is transferred to the shift register 39, the Q switching switch 42.4 is activated.
3 to the opposite side from the side shown in the figure.

When the changeover switches 42 and 43 are switched, the image signal of the (k+1)th line outputted from the shift register 39 is returned to the shift register 39 via the changeover switch 42. At the same time, from the shift register 40 (1), the image signal of the k1th line is output to the output terminal 33, and at this time, both signals of the additional 21 lines generated by the impressive 1 line generation circuit 41 are sent to the shift register 4o through the changeover switch 43. In this way, the image signal of the additional line is accumulated in the shift register 40 to finish the output of the kth line, and the image signal of the additional line is stored in the shift register 39 (k+1
), the changeover switch 4g;, 43 is returned to the side shown in the figure before starting processing of the next line. Therefore, the image signal of the additional line in the shift register 40 is output, and the shift register 39
The image signal of the (k-1-1)th line] is transferred to the shift register 4o.

Here, the additional line image signal generated by the additional line generation circuit 41 is an image signal output from the shift register 39.40, that is, a logical sum signal of the image signals of two lines before and after the additional line.

As described above, the image signal output from the word processing sensor 21 is converted by the density conversion device 22 into an image signal having a density suitable for the facsimile machine 23, and is input to the facsimile machine 23. Therefore, it is possible to transmit a document to a remote location without deterioration in image quality or change in character size without performing special processing on the facsimile device 23, that is, by using a conventional device as the facsimile device 23.

In this embodiment, the dot spacing of the printer device of the word processor 21 is 1/160 inch, but there are also word processors using printer devices with dot spacing of 1/12o inch or 1/180 inch. When transmitting a document created by such a word processor, it is necessary to change the number of additional bits and lines, but this can be easily handled by changing the determination circuits 36 and 46.

Effects of the Invention The present invention interposes a density conversion device between a word processor and a facsimile machine, and converts the image density of the document output from the word processor into the image density of the image size suitable for facsimile 7mm 4k format. Since the data is converted and input into a facsimile machine, it is possible to transmit a document created by a word processor using a general facsimile machine to a remote location without deteriorating the image quality or changing the character size.

[Brief explanation of the drawing]

Figure 1 is a schematic block diagram showing the general configuration of a word processor. Figure 2 is an illustration of image quality deterioration when a document created with a word processor is printed and input to a facsimile machine for transmission. Figure 3 is Akira Mokusakura. A system diagram of a document transmission system according to an embodiment, FIG. 4 is a block diagram showing an example of a density conversion device, FIG. 5 is an explanatory diagram of an image signal after processing density conversion in the main scanning direction, and FIG. 6 is an explanatory diagram of a method of generating additional pinot h. 21...--word processor, 22...--
Cotton density conversion device, 23...Facsimile device, 34
, 39° 40...Shift register, 36...-
...Binoto count, 36.45...Judgment circuit, 37...Additional bit generation circuit, 3B, 4Q
, 43... Changeover switch, 41... Additional line generation circuit, 44... Line counter. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 9 r2+ Figure 3

Claims (1)

[Claims] Connect a word processor and a facsimile device via a detailed conversion device, and create a ``two-minute conversion device'':
Line density conversion processing is applied to the image signal of text iI4 outputted from the word processor, which adds bits to a predetermined number of bits and adds one line of image signal for every predetermined number of lines. A document transmission method characterized in that an image signal subjected to density conversion processing is input to the facsimile device.