JPS5892055A - Picture information transmitter - Google Patents

Abstract

PURPOSE:To attain high density transmission with a conventional CRT, by providing an interval character generating device and further providing an addition circuit for both picture signals and displaying a plurality of picture elements with one picture element/so that the scanning pattern and characters of an internal character generator can be displayed on the CRT. CONSTITUTION:A picture pattern is converted at a detection circuit 5 and stored in a memory 14, read out at a display address counter 7 and displayed on a CRT17 via a signal summing circuit 16. The user edits character inputs on the CRT while observing this picture. In this case, the characters are stored in a memory 15. The character pattern generator 4 and displayed on the CRT17 via the circuit 16. When the edition is finished, the picture signal in the memory 14 is compressed with a transmission start signal from a KB13 by using a variable length code file 3 and the result is transmitted to a called station.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an image information transmission system in which image information handled in facsimiles, etc. is transmitted using variable length codes, and image information such as sentences obtained by editing with a word processor etc. is transmitted using character codes. The present invention relates to a display device that enables the editing operation by superimposing and displaying both image information on the same screen.

2. Description of the Related Art Facsimile is a conventional image information transmission device that transmits information such as handwritten characters and patterns or printed manuscripts. This facsimile machine obtains an image signal by scanning an input document, but since the input document generally has many blank areas, an image signal with a high degree of redundancy is obtained. Therefore, in order to reduce this redundancy, for example, the document ``7 Axit IJ Basics and Applications'' published by Dentsu Tsushin Ukin,
Compressed transmission is performed by using a variable length code (for example, a run-length code) as described in P.159.

However, information compression of input dual-image information using variable-length codes can be sufficiently effective for images in which white and black parts are relatively continuous, such as in Sme. For biographical images such as Japanese sentences in which kanji or kana are consecutive, a sufficient information compression effect cannot be obtained because white parts and black parts frequently appear alternately.

Therefore, by transmitting Japanese sentences as character codes, it is possible to realize higher-density data transmission than the conventional WJ image information transmission device. This cannot be obtained by scanning the input document as in the case of . Characters, symbols, etc. as image-containing cover patterns are displayed on a CRT (cathode ray tube display).
By editing the characters on the CRT using means such as a word processor while viewing the display, a sentence is constructed, and image information representing the sentence is obtained. However, as will be described later, when a CRT is installed in a conventional image information transmission device (such as 7Axis) that performs image scanning, and an input image pattern obtained by scanning is to be displayed on the CRT, the scanning of the image The line density is 800 x 1200 squares for A4 size, while for standard television CRT it is 79 squares, so if interlace is not considered, the effective scanning line density is about 200 squares.
Because it is a 200 g element, in order to display the image scanning pattern on the CRT, a CRT with high definition different from the CRT used conventionally is required.
It had the disadvantage of being expensive.

The present invention has been made in order to eliminate the drawbacks of the prior art as described above, and therefore, an object of the present invention is to simultaneously display an image scanning pattern and characters/symbols, etc. on a standard television type CRT. The image information transmission device is equipped with a display means that enables the display, and while viewing the display, the user operates a word processor or the like to edit the characters on the CRT to create a sentence.Then, the image scanning information is converted into a variable length code, and the sentence is created. The object of the present invention is to provide an image information transmission device that transmits each character code.

In order to achieve the above object, the present invention incorporates an internal character generator and a CRT into a conventional image information transmission device that performs iin scanning.
In order to display the image scanning pattern on the CRT screen and edit while viewing the characters generated by the internal character generator on the CRT screen, both the image scanning pattern and the character wn signal are used. An adder circuit is added which adds the signals and outputs them to the CRT.
m and n are arbitrary integers) are converted into 111 prime numbers and C
By providing a means for displaying the image on the RT, it became possible to use an inexpensive CRT that does not have particularly high definition.

Hereinafter, the present invention will be explained in detail using examples.

FIG. 1 is a block diagram showing an image information transmission device as an embodiment of the present invention.

In FIG. 1, 1 is a central processing unit (hereinafter abbreviated as CPU) that processes image information signals, 2 is a ROM memory that stores its control program, etc., and 3 is a variable length code that compresses the band of image data. 7 is a file, 4 is a character turn generator in which character patterns are stored, and 5 is an input image t.
4 an image signal detection circuit which scans the p-n and obtains an image signal; a multiplexer which controls the flow of the image signal;
Display address counter 9, which provides timing for reading out image data stored in display memo 914.15 so as to correctly display it on cathode ray tube (CRT) 17, is connected to modem interface 78 for connecting modem 10 and CPU 1. , 10 is a modem, ll is a control device that controls the transmission line network, 12 is a keymate 13 and a CPU.
13 is a keyboard; 14 is a display memory for scanning input that stores image signals obtained from the image signal detection circuit 5 for displaying on a CRT; 15 & 1 is a JIS character selected by the keyboard 13; Character code display memos 1 and 16 that store standardized character codes add the image signal from the display memo 1/4 for scanning input and the image signal from the character pattern generator 4 to CR.
A signal addition circuit that enables simultaneous display on T17, l7 is a cathode ray tube (CI'LT), and 21 is a telephone line II.

22 is a telephone, 23 is a data bus, and 24 is an address bus.

In such an image information transmission device, the image signal detection circuit 5 converts handwritten characters and patterns to be transmitted, or image patterns of a document, etc. into time-series electrical signals, and these signals are scanned and inputted by the function of the CPUI. The signal is stored in the display memory 14 for the display, and then sequentially read out by the display address counter 7 and sent to the cathode ray tube 17 via the signal addition circuit 16.
Display above.

While viewing the image displayed on the cathode ray tube, the user inputs and edits characters on the cathode ray tube using the key dart 13 at any position on the image.

At this time, the character selected by the keymate 13 is stored in the character code display memory 15 via the interface 12 by the action of the CPU 1 as the JIS code of that character. Then, the character code is read out by the display address counter 7, and the character pattern corresponding to the character code is outputted from the character pattern generator II4 and displayed on the cathode ray tube 17 via the signal addition circuit 16. When the editing is completed in this manner, the user inputs a transmission start signal using the keymate 13. With this transmission start signal, the image signal stored in the display memo 'J14 for scanning input is
The data is compressed by converting it into a variable length code using the variable length code file 3, and the compressed signal (variable length code) is sent to the transmission line (here, Phone call $
I21). Kurata, JIS standard character code 4 stored in the character code display memory 15
0117 is read out as a character code signal as it is through the multiplexer 6, and is subsequently transmitted by the same operation. This type of character encoding is, on average, 1/10 to 1/10th faster than a method that transmits characters in a dot-by-dot pattern.
Since the amount of information is reduced by 1/15, the amount of data can be reduced compared to about 115 times with the data compression mentioned above, and by using both data compression and encoding, it is more effective than an image information transmission device that only uses data compression. Even higher density data transmission becomes possible.

Furthermore, the scanning line density of the image signal obtained by the image signal detection circuit 5 is determined by CCI TT (International Telegraph and Telephone Intermediate Committee 4I).
According to the current standard, when transmitting an A4 size document in 1 minute, it is 3.85 lines/W, which is 800x1 for A4 size.
20011 elements are scanned. Further, the effective number of scans of a standard television CRT is approximately 200×2G0II elements. When displaying an input image, <turn, on a CRT, it is only necessary to determine the character positional relationship for editing, so the resolution of the image pattern on the CRT is not required. Therefore, the image signal of (800 x 1200) dots stored in the display memory 14 for scanning input is converted into (2
00X200) By converting the image signal into a DoraF image signal and displaying it on a CRT, a conventional inexpensive CRT can be used. In this case, of course, when transmitting the image pattern, the data in the scanning input display memory 14 stored at the scanning line density of the image scan is variable-length coded to compress the signal and then transmitted.

An example of a method for converting this prime number will be described below.

FIG. 2 is a block diagram showing the scanning input display memory 14 of the first wJ in more detail in order to explain this specific example. In the explanation of this example, a standard 800 x 1200 pixel document is scanned for a human 4 size document.
To simplify the explanation, it is assumed that 800xsooiii+ prime scanning is performed, and the following explanation will be based on that. Since the effective scanning number of a conventional CRT is approximately 200xzooiii elements, it is sufficient to display 1 pixel F for every 4 pixel Y of the signal obtained by scanning the image vertically and horizontally on the CRT. .

In the 2nd vA, 19 is zooxzoox4 via 1
) Display memory - This is divided into 4 parts, each with 200
X200-bit memory, 0 used as B, C, and D. Also, 18 is a display memory decoder that performs chip selection for display memory 19, and 20 is a display memory decoder that adds resistance to the input digital signal and converts it into an analog quantity. This is a resistance adder circuit that outputs the same result as shown in FIG.

Further, the third WJ includes a resistance addition path 20 and a signal addition circuit 1.
Further, FIG. 4 is an explanatory diagram showing the correspondence of each pixel when changing the number of scanning pixels of 5ooxsoo to the number of scanning pixels of 200×200.

Now, the image scanning pattern 5ooxsoo dots (left in FIG. 4) obtained by the image signal detection circuit 5 in FIG.
The display memory 19 is operated by the display memory decoder 18 in the figure.
A to D are selected in order)C8, and as shown on the left side of Figure 4, the 1st line, 5th line, etc.
・(4n+1)th line (1-Q, l, 2+...
...199)...The image pattern of the 797th line (1, 2, 3, 4) is stored in A of the display memory 19 shown in the 2nd w:i, and the image pattern of the (4n+2)th line [ 5, 6, 7, 8] is the display memo in FIG.
0, 11, 12) are stored in C of the display memory 19, and the (4n+)th
4) Line image pattern (13, 14, 15, 16
) are respectively stored in D of the display memory 19.

When displaying the image pattern stored in this way on a CRT, as shown in FIG. 2, chips A to D of the display memory 19 are simultaneously selected by a display gate signal.
Now, focusing on A of 19 displayed on the display, 4 of (1, 2, 3, 4) shown on the left side of Figure 4 corresponds to the address from CPU 1.
The bits are input in parallel to the resistor summing circuit 20 via multiplex v6. The resistance adder circuit 20 is connected by a resistance ladder as shown in FIG.
．． 4 is input. The digital signals input to the input terminals 1, 2, 3, 4 are added as analog signals via resistors, and in the part A of Fig. 3, the 4 signals (1, 2, 3, 4) shown on the left of Fig. 4 are added.
Bits are output as one analog value. Similarly, the 4-bit outputs of each of B, C, and D of the display memo January 9 in FIG. 2 become one analog value in the first, third, and second portions shown in FIG. 3, respectively. Therefore, the output of the resistance adder circuit 20 is i.

The summation signal of the analog addition of , !, and 2 is obtained.

The hatched part in 2) is 1 of the L pixel in the figure on the right.
It can be converted as a 6-gradation analog/4G signal 1'.

From now on, by repeating the same process, 800 x 800
pixels can be converted to 200×200 pixels.

The image signal thus obtained is displayed on a CRT via a signal addition circuit 16 shown in FIG.

In the signal addition circuit 16, priority is given to character pattern information based on the input from character pattern generation #4, and the information is displayed on the CRT.

As described above, according to the image information transmission device according to the present invention, the scanning line density is 800×120011 in A4 size.
The original input image pattern is converted into a standard television system C
The effective scanning line density of RT can be converted to 200 x 200 pixels for display, which has the advantage of realizing higher density data transmission while using an inexpensive general-purpose CRT.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a body M of the pixel number conversion means used in the present invention, and FIG. 3 is a block diagram showing the resistance adder circuit 20 and signal A circuit diagram showing a specific example of the addition circuit 16, FIG. 4 is an explanatory diagram showing the correspondence of the number of pixels before and after conversion,
It is. Code explanation 1...Microprocessor, 2...R
OM, 3...Variable length code file, 4...
... Character pattern generator, 5 ... Image signal detection circuit, 6 ... Multiplexer, 7 ...
Display address counter, 9...Modem interface, 10...Modem, 11...
Network control device, 12...Keyboard interface, 13...Keymate, 14...
Display memory for scanning input, 15...Character code display memory, 16...Signal addition circuit, 17...
... Braun tube, 18 ... Display memory decoder, 19 ... Display memory, 20 ... Resistance addition circuit agent Patent attorney Akio Namiki

Claims (1)

[Claims] 1) A first storage means for storing an image signal obtained by scanning a handwritten or printed character, and a first storage means for storing an image signal obtained by scanning a handwritten or printed character; and a second storage means for storing a set of symbols etc. as an image signal, the storage contents stored in the first storage means are variable length codes, and the storage contents stored in the second storage means are In an image information transmission device configured to transmit each character code, an image signal stored in the first storage means and an image signal stored in the second storage means are added and displayed on the same double side. An image information transmitting apparatus characterized in that the image information transmitting apparatus is characterized in that the image information transmitting apparatus is provided with a means for making the editing operation possible by viewing the display. 2. In the image information transmission device according to claim 1, the display means converts (mXn) 11 elements of the image signal stored in the first storage means into 111 elements and displays the converted image signal. An image information transmission device (
However, m and i are each arbitrary integers).