JPS6364465A - Drawn picture communication equipment - Google Patents

Abstract

PURPOSE:To accurately attain in a erasure in a designated way by storing a picture drawn data in a memory dividedly, which is inputted after a picture drawing pen lands on a picture drawing pad till it is lifted up as one unit. CONSTITUTION:A picture drawn data inputted onto an input plane of the picture drawing pad 1 by a picture drawing pen or the like and a voice signal inputted from a telephone set 9 are outputted to a telephone line L in multiplex. A control circuit 4 stores a coded picture signal in a data memory 6 and displays it on a CRT 14. The picture drawing data inputted after the picture drawing pen lands on the pad 1 till it is lifted up is stored in the memory 6 as one unit and a command identification data and a section data (ISP) are constituted as a pair as each picture drawing data. If it is required to correct an ammended drawn picture, the picture drawn data is read from the memory 6 as a unit, the drawn data is erased from the CRT 14 based on the read data and also erased from the memory 6 to attain the erasure as designated surely.

Description

[Detailed description of the invention] g) Industrial application field The present invention relates to a graphical image communication device.

(b) Conventional technology Ordinary telephone line? A drawing image communication device has been developed that utilizes this method to transmit and receive handwritten images and all sounds together (see Research Practical Application Report Vol. 52, No. 1E5 [983)].

In this drawing image communication device, when erasing an image that has been completed by one hand, select the partial erase mode and specify the area to be erased by enclosing the entire area with the drawing pen, and the closed area includes 'f, t'.
How to delete drawing data.

Two types of erasing methods are available: specifying the starting point of the rectangular area to be erased with the drawing pen by selecting the eraser mode, and erasing the drawn data by moving the drawing pen as if erasing it with an eraser. .

However, in all conventional erasing methods, the erasing area is specified with the drawing pen, so if the drawing pen is moved to a wrong position from the specified position, the necessary figure may also be erased, resulting in inaccurate erasing. There were 9 problems.

C) Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned problems, and provides an image communication device that can accurately erase all lines.

2) Means for deciding the problem The present invention stores the drawing data inputted from the time the drawing pen is down on the drawing pad to the time it comes up again in the memory as fc1 stroke data, and then erases it. In this case, it is conceivable that the stroke data be erased from the drawing screen of one display device by erasing it from the memo y in units of stroke data.

(e) Operation Since the present invention has been solved as described above, (14) when the operation is performed, the handwritten drawings are erased stroke by stroke exactly as they were handwritten, so there is no possibility of erasing the necessary drawings. The accurate / accurate / 14N -left can be performed.

(1) is an aIJfJ pad composed of a pressure-sensitive tab knot or the like, and an image is input by hand with a drawing pen or the like onto the input surface of this drawing pad (1). Also, this drawing pad (1
) is equipped with various mode selection switches (2). (3) is a predictive coding (DPCM) mode in which the image data of the drawing pad (1) is input as X and Y coordinate signals.
) circuit encodes it using a predetermined method and outputs it as a digital signal. (4) is a control circuit into which the output of the DPCM encoding circuit (3) and the output of the drawing pad (υ) are input, and it is composed of a microprocessor and is pre-stored in the program memory (5). The IIi [1111 of the entire device is controlled according to the processing program.(6) is the II
JI! It is a data memory in which encoded image signals are stored under the control of the i1 circuit (4) if, and a! Image signals are stored in the format shown in FIG.

In other words, all drawing data input from the time the drawing pen is placed down on the drawing pad to the time it is brought up is stored as one unit, and a large amount of drawing data includes commands indicating color attributes, etc. Identification data and 1 category data (ISP
) are configured as a pair. (7) is the first FSKS demo where the image signal encoded by the DPCM encoding circuit (3) is supplied, and the encoded painter signal is sent via the general telephone line (L). Therefore, FSK (Fre
quencyShift Keying) Wei'iJM
Row k 71j5° Note that: F SK modem circuit (7) conversely demodulates the modulated image signal received from the communication partner via LJ.

(8) is a demultiplexing circuit which multiplexes the ssa9#gR signal and the voice signal input from the telephone (9) according to FSXS demo 1 (7) and outputs it to the telephone line LL). death.

The multiplexed signal received from the other party via the telephone line (L)'e is separated into an audio signal and an image signal modulated on the sending side, and the audio signal is sent to the telephone (9).

The image signal is output to the aforementioned FSKS demo 1 path (7).

Qf) συ is a switching circuit that is switched under the control of the control circuit (4), and the switching circuit <1 (l is a switching circuit that connects the telephone (9) to the switching circuit συ and the demultiplexing circuit (8), and The switching circuit serves to switch and connect the telephone line m1 (L) to the switching circuit (1 (11) and the demultiplexing circuit (8).

(FSKS demo 1 sent from la/li partner 10,000
A DPC that decodes the image signal demodulated according to path (7)
M decoding circuit (2), and the image signal decoded by this DPCM decoding circuit (2) is given to the image memory a4.
Ru. Image memory (L) uses the drawing pad (1) when sending
7''
L is displayed on the CRT display u4)K, and DP is displayed when receiving.
The decoded image signal is stored in the CM decoding circuit 4 and displayed on the CRT display f (L41).
This lamp indicates the mode selected in step 2], such as simultaneous communication mode, single drawing mode, drawing accumulation mode, and erasing mode.

The switching circuit (IQI (IU) is normally switched as shown by the solid line, and the telephone (9) is configured so that it can be directly connected to the telephone line (L) and used as a normal telephone.

Next, the operation of the present invention, which is the configuration, will be explained based on the flowchart shown in FIG.

First of all, let's draw and communicate 74! Dial the other party using the handset (9) and call the other party. The communication partner is also equipped with the picture communication device shown in Figure 1, and since the 'iK telephone terminal rings when the communication is received, if the telephone receiver is completely disconnected and the telephone is answered, the communication can be carried out as a normal telephone. Because I can,
Tell them that you would like to perform drawing communication, and both parties operate the mode selection switch (2) of the drawing pad (IJ).For example, if the simultaneous communication mode is selected, the control cycle that detected the 1 selection signal lol!! (43 At the same time, the switch circuit α (111) is switched to the dotted line side, and the demultiplexing circuit (8) for the aiIE telephone (the filler and the telephone opening W&(L)) is turned on. The control circuit (4) lights up the input acceptance rung (l!o) to indicate the input acceptance state.

Therefore, when an image is drawn by hand using the drawing band (υ), one image signal is converted into X and Y coordinate signals by the DPCM encoding circuit (3
) is temporarily stored in the transmission buffer area of the data memory (6).The encoded image signal is then modulated in the FSK modem circuit (7) and then sent to the demultiplexer circuit (8). ) is sent to the telephone port fi (L) and transmitted to the other party of the communication.At this time, if there is an audio signal from the telephone alt97 area, the image signal and audio signal subjected to f-tone processing are sent to the demultiplexing circuit. (8), and are simultaneously output to the talk line (L).The control circuit (4) also controls the FSXSX Moro line (
According to the modulation processing in 7).

The encoded image signal 'f' is sequentially supplied from the transmission buffer area of the data memory (6) to the FSK modem circuit (7) for modulation processing. Furthermore, the control circuit (4) loads the image data into the image memory a~ based on the X and Y position 4 signals of the drawing pad (1) area, so that the image is handwritten on the drawing pad (1) on the CF4T display device. It will be displayed at the same time.

In the image communication devices of the 10,000 communication partners, the received signal is separated into an audio signal and an image signal by the demultiplexing circuit (8), and the audio signal is sent to the packing machine (9). The number is F'S
The signal is supplied to the K modem circuit (7) for demodulation. And demodulated signal = 60 After decoding by PCM decoding circuit α2, 1
The image is written to the image memory and displayed on the CRT display device IiC. Even if drawing is in progress, there are multiple separation times in the above-mentioned L.
(Since the voice signal is separated from the telephone 8J and is supplied to the telephone set 9, both parties can make a telephone conversation.)

Next, the operation when the drawing accumulation mode is selected with the mode selection switch 7-(2J) will be explained.
is stored in the format shown in Figure 2.

A display is made on the CRT display device I. There are no special corrections to be made to the TI image that is displayed after drawing is finished (if you do so).

When the batch sending mode is selected with the mode selection switch (2), the #control I!! circuit (4) that has detected the mode signal sequentially reads out the drawing data stored in the data memory (61) and performs the same process as described above. Because the method is f!l-line.

A drawing is displayed on the CRT display device I on the receiving side.

If it becomes necessary to correct a single handwritten drawing in the middle of one drawing or at the end of AVM, operate the o-erase switch and the control circuit that has detected all the switch signals in step 4 (8t) t47 is #i- input after j &
Data t Step (
Data rOJ in the predetermined area of image memo 9 with Sa)
', the point is erased from the CRT display device (141). Similarly, based on the data read from the data memory (6), the data 'Oj' is written to the image memory αJ. As a result, the stroke is erased from the CRT display device I. When the processing of the drawing data from the data memory (6) is finished, the control circuit (4) erases the read data from the data memory (6) and Move the pointer indicating the last storage position of the data memory (6) to the previous section data (ISPI position) ◎ From now on, every time the stroke erase switch is operated, the last storage position of the data memory (6) is moved. As the drawing data is erased, the corresponding strokes are also erased from the CRT display device σ4.

At this time, at the intersection of the line to be erased and the line not to be erased, the data rOJ is written to the image memo 9, so the intersection is not erased.
However, in this case, by operating the redisplay switch, the control circuit (4) that detected the switch signal in step (S8) starts drawing data in the data memory (6) from the beginning and sequentially stores it in the image memory. By writing in the text, the intersection points will also be displayed in the redisplayed drawing.

When all the necessary strokes have been erased, once again input one stroke to the drawing pen, the drawing data is newly stored in the data memory (6), and the CRT display device 114)K Then, the correction is finished, and in step (SIO) (5ll), the batch sending mode is selected, and the data is drawn on the display device f1tua on the receiving side in the same way as described above.

(G) Effects of the Invention As described above, the drawing image communication device of the present invention stores in the memory the drawing data inputted from the time the drawing pen is placed down on the drawing pad until the time the drawing pen is brought up as one unit. , each time the erase switch is operated, the drawing data input last is read out from the memory in order, and erasing is performed for each drawing unit based on the read drawing data. '), and two lines of positive erasing can be performed, which is extremely effective in practical use.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the image communication device of the present invention, FIG. 2 is a schematic diagram showing the configuration of the data memory shown in FIG. 1, and FIG. 3 is a flowchart showing the operating state of FIG. 81. (1)...Drawing band, (3)...DPCM encoding circuit, (4)...Control circuit, (7)...FSK modem circuit, (8)...Demultiplexing circuit, ( 9J...' core filling machine, Soba...DPCM decoding +!ul path. Gamble...image memory, En...CRT display device.

Claims (1)

[Claims] (1) In a drawing image communication device that multiplexes drawing data inputted by an input device consisting of a drawing pen and a drawing pad with an audio signal inputted from a telephone and outputs the same to a telephone line, the drawing pen is connected to the drawing pad. a memory for storing input drawing data as one unit from when it is downloaded until it is uploaded; a display device for displaying the input drawing data; an erase instruction means; What is claimed is: 1. A drawing image communication device characterized by comprising a control means for reading out drawing data unit by unit from a memory, and controlling the drawing to be erased from a display device and also from the memory based on the read data.