JPS6084067A - Character/graphic information adaptor - Google Patents

Abstract

PURPOSE:To simplify the constitution and to improve the operability by controlling the operation of a terminal device with a signal from an operation input means by a processing circuit and using an operation input means in common for the operating by the processing circuit. CONSTITUTION:An adaptor 17 consists of a processing circuit 18 and a keyboard (KB) 19. The circuit 18 generates a strobe signal from a line 25 at a time t6 as shown in Fig. 4 in response to an input data from the KB19 at a time t1. This is the same for the data from the KB19 at a time t3. The strobe signal 25 is received by a terminal device 5 via a buffer 26. A processing circuit 6 is activated by calling a video tex center 4 with a telephone set 5 during the operation. Then the terminal device 5 is connected to the processing circuit 6 through the operation of the KB19. An input/output port 22 leads a display switching signal to the line 29 in this case and a display means 8 displays a video signal from the processing circuit 6. Moreover, the data signal and the strobe signal are generated with the operation of the KB19, the terminal device fetches the data and applies it to the processing circuit 6 via telephone lines 3, 2 so as to retrieve data of a memory 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an apparatus for transmitting and receiving character/graphic information signals such as characters or figures via a telephone line and displaying images.

BACKGROUND ART In recent years, personal computers have begun to penetrate homes. Furthermore, it is expected that devices for transmitting and receiving text/graphic information via telephone lines will become widespread in the future. In this case, it would be complicated if a separate keyboard was provided for each terminal such as a personal computer or a character/graphic information device.

Operability is poor.

Purpose An object of the present invention is to provide a novel character/graphic information adapter that has a simplified configuration and improved operability.

Example Figure j81 is a block diagram of an embodiment of the present invention.

A device for text/graphic information called a so-called videotex is connected to a videotex center 4 and a terminal 5 provided for each user via a telephone line 2.3 of a telephone office 1. be done. The videotex center 4 is provided with a first processing circuit 6 consisting of a so-called minicomputer or the like.

A storage circuit 7 such as a floppy disk is connected to the first processing circuit 6. Text/graphic information signals from the videotex center 4 are received by the terminal 5 via the telephone line 2, the telephone office 1 and the telephone line 3, and can be displayed on an image display means 8 such as a cathode ray tube.

In the terminal 5, a coupling circuit 9 coupled to the telephone line 3;
It includes a modulation/demodulation circuit 10 and a control circuit 11. The modulation/demodulation circuit 10 demodulates the character/graphic information signal via the coupling circuit 9 and supplies it to the control circuit 11. Further, the signal from the control circuit 11 is modulated by the modulation/demodulation circuit 1o.

The signal is routed from the coupling circuit 9 to the telephone line 3 and transmitted to the videotex center 4. Transmission and reception are controlled by 9 coupling circuits and 1 coupling control circuit 12. The video signal from the control circuit 11 is synthesized by the video synthesis processing circuit 13, and is provided to the image display means 8 from the video signal output circuit 14. A telephone set 15 is connected to the coupling circuit 9 .

The first processing circuit 6 provided in the videotex center 4 is equipped with a keyboard 6a. this keyboard 6
The coded output signals used with the terminal device 5 according to the operation of each key in a are as shown in Table 1.

Table jg1 The contents of symbols PFI to PF8 used in Table 1 are the same as in Table 2. By operating each key of the keyboard 6a shown in Table 1, various operations shown in Table 2 can be suggested.

The signal from the video signal deriving means 16, such as the second surface image display means 81-t, a television receiver or a video tape recorder, can also be displayed as an image.

In order to control the operation of the terminal 5 in this way [.

The character/graphic information adapter 17 according to the present invention is basically a second
It includes a processing circuit 18 and a keyboard 19 as an operation input means realized in a manner according to the 1-day wood industry standard. Second
The processing circuit 18 connects the input/output port via the system bus 2 (l).
)21.22. Terminal 8 from input/output boat 21! The signal for the activation of 5 is via line 23 and the parallel 8-bit data signal is via line 24.

Additionally, a strobe signal representing a read command is provided via line 25 to buffer 726.

The buffer 26#-t is connected to the control circuit 11 of the terminal 5 via the line 27.

Video signal II'i from second processing circuit 18, line 28
The image is provided to the image display means 8 via. Image display means 8
In order to control the operation of the VC, signals from the second processing circuit 18 via the system bus 20 are applied from the input/output port 22 to the image display means 8 via a line 29. This line 29? : The image display means 8 receives the video signal from the videotex center 4 through the telephone line 2.3, the video signal from the second processing circuit 28, and the video signal from the second processing circuit 28.
The image is displayed by switching between the video signal from the video signal deriving means 16 and the video signal from the video signal deriving means 16.

@2 The operation of the single character/graphic information adapter 17 will be explained with reference to FIG. During the period from time t1 to time t2 in FIG. 2 fl), data is input by pressing the key At- on the keyboard. Moreover, as shown in FIG. 2 (2), from time t3 to
At t41C, another key B is pressed to input data. The second processing circuit 18 is.

At time t5, after a time w1 of at most 20 m5ec has elapsed from time t1, data corresponding to key AK is derived as shown in FIG. 2 (3), and this data 1 (i-
It is obtained from the j3-line 24. This data signal is 1
After the lapse of time W2, which is, for example, 50 μsec, from time t5, it becomes stable, and at time t6, a strobe signal is generated from line 25 as shown in FIG. 2 (4).

The pulse width w 3 ilt of this strobe signal is, for example, 140 μsec. When key B is operated at time t3, data signal P is similarly generated from line 24 at time t8, and at time 1 [9, the data signal becomes stable. A strobe signal is generated from line 25 during the period from time t9 to time tlO. Thus, when the strobe signal 25 is received by the control circuit 11 of the terminal 5 via the buffer 26.

The data signal via buffer 26 is read.

During operation, the entire telephone 5 is used to call the videotex center 4 and activate the first processing circuit 6. Then 1 character/
Signals are generated from all lines 23 for operating the function keys provided on the keyboard 19 of the graphic information adapter 17 and activating the terminal 5. As a result, the terminal device 5 is connected to the first processing circuit 6 online. At this time, a display switching signal is derived from input/output capo) 22Iri and line 29, and one image display means 8 is connected to first processing circuit 6.
It is now possible to display the video signal from.

Then, following the keyboard 19 operations, line 24.2
5 generates a data signal and a strobe signal as described in connection with FIG. 2, and the control circuit 11 of the terminal 5 receives data in synchronization with the strobe signal. The control circuit 11 modulates the signal taken in via the line 27 by the demodulation circuit 10, and sends the signal from the coupling circuit 9 to the telephone port m3.2'.
ft to the first processing circuit 6 so that the data stored in the memory 7 can be retrieved.

The information in the memory 7 found by searching in this way is as follows.

It is sent from the telephone lines 2 and 3 by the first processing circuit 6Vc, is demodulated by the demodulation circuit 10 via the coupling circuit 9,
The image is displayed by the image display means 8 after passing from the control circuit 11 to the video synthesis processing circuit 13 and the video signal output circuit 14. The contents stored in such memory 7 may be information such as a weather map for each predetermined region.

After the videotex center 4 and the terminal 5 are connected by operating the telephone 15, even if the receiver of the telephone 15 is hung up and a normal call is cut off, the function of the '@2 processing circuit 18 allows the terminal The device 5Fi remains connected to the videotex center 4, and the communication is terminated by operating the keyboard 19.

The video signal derived from the second processing circuit 18 on line 28 is also displayed by the one-image display means 8 as described above. In this second processing circuit 18.

Other devices are connected via system path 20 and data from those devices as well. The signal can be derived from the line 28 as a video signal and displayed by the one-image display means 8. The second processing circuit 18 is connected to other devices via a system node 20, and these devices can be centrally controlled using a keyboard 19.

Effects As described above, according to the present invention, since the operation of the terminal is controlled based on the signal from the second processing circuit and the operation input means, it is possible to The operation input means can also be used, simplifying the configuration and improving operability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a waveform diagram for explaining the operation of the embodiment. 1... Telephone office, 2, 3... Telephone line % 4... Videotex center, 5... Terminal iso, 6... First processing circuit. 7...Memory, 8...Image display means, 9...Coupling circuit. 10... Modulation/demodulation circuit, 11... Control circuit, 15...
- Telephone device, 16... Video signal deriving means, 17... Character/graphic information adapter, 18... Second processing circuit, 19
... Keyboard, 21.22 ... Input/output board, 2
6... Banghwa agent Patent attorney Kei Nishi

Claims (1)

[Claims] Includes a terminal device that transmits and receives text/figure information signals to and from a first processing circuit via a telephone line, and an image display means that displays text/figures based on signals from the terminal device. letter/
Provided in the graphic information processing device. and a second processing circuit connected to the terminal. and operation input means for inputting a signal to the second processing circuit. A character/graphic information adapter characterized in that the second processing circuit ilt controls the operation of the terminal in response to the output from the operation input means and performs other arithmetic processing.