JPS58147286A - Terminal device of picture information - Google Patents

Abstract

PURPOSE:To select efficiently each medium such as character broadcast and CAPTAIN system, by receiving character broadcast normally and switching a switch to a CAPTAIN signal automatically when the CAPTAIN signal is incoming from a telephone line. CONSTITUTION:A character broadcast signal from an antenna 10 is normally processed at a character broadcast signal processing section 2 and inputted to a receiver via a switch 4A. In connecting a picture information terminal device 1 to the center by a telephone set 12, since the CAPTAIN signal is given to the terminal device from the center, this carrier wave is detected at a carrier wave detecting circuit 6, and a high-level detection signal is outputted to a switch controlling circuit 5. Thus, the CAPTAIN signal is inputted to a CAPTAIN signal processing section 3 via a switch 4B and processed into a signal format for a household television receiver and displayed on a receiver 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image information terminal device, and more particularly to an image information terminal device including a teletext signal processing section and a captain signal processing section.

With the diversification of information, various information media (media, means)
Nowadays, as the world of information technology continues to develop, it is hoped that information media will emerge that will allow users to obtain desired information from a vast amount of information. Recently, studies and experiments on media that meet this demand have been conducted in various places. These media are hand-driven in that the receiver can select the desired image of the hand from among a large amount of image information and display it on, for example, a color monitor. The basis of this so-called new image information media is to visualize information and convey it to the user's hands. As a means of visualization, a color television receiver, which is common in every household, is used.

In Japan, a typical example is teletext broadcasting (hereinafter referred to as teletext broadcasting), in which programs consisting of characters and graphics are multiplexed during the vertical blanking period of television waves and displayed on a regular television receiver. The Text and Graphic Information Network (hereinafter referred to as "Captain") displays information stored in the center and on television receivers in accordance with user requests. )
can be mentioned. These information media are currently
Broadcasting stations or telephone center stations accumulate image information all at once, and text broadcasting is a format in which image information is sent continuously. Then, select the desired image on the receiving terminal. on the other hand,
The captain transmits the control signal of the image desired by the receiving terminal to the image center, which decodes it and transmits the corresponding 11 images to the terminal. For teletext broadcasting and Captain, we have arranged for the display screen configuration to be the same in consideration of future integration and sharing (for example, the entire screen consists of 248 horizontal dots x 204 vertical dots, a total of 50.592 dots). ). This means that there is no need to provide a dedicated signal processing section on the terminal side for each media, but by developing a signal processing section that can be used in common (there is a possibility that it can be used for each media). It is also superior in terms of price, reliability, etc.Also, even if images are displayed on a color television receiver, if the video format is the same, it will be easier for the viewer to see the difference between each media. It is thought that there is little discomfort.

Under these circumstances, if a common terminal device for teletext and captain's media is installed on the terminal side, and the receiver can efficiently select which media to use, even more information will be available. You can select your favorite image information. This invention has been made in view of this objective.

To summarize, the present invention includes a signal processing unit for teletext broadcasting;
It is equipped with a captain signal processing section and a switch means, and the output from the teletext signal processing section is normally output to the color television receiver, and when the captain's signal is input from the telephone line, its carrier wave is This is an image information terminal @stomach that switches the switch means and outputs the output from the captain's signal processing section to the color television receiver.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the invention.

The image information terminal device 1 according to the present invention includes a teletext signal processing section 2, a captain signal processing section 3, switches 4A and 4B, a switch control circuit 5, a carrier wave detection circuit 6, and a remote control receiving section 7. and a remote control transmitter 8. The teletext signal processing unit 2 has an antenna input terminal 21
, an image signal output terminal 22, and an image selection signal input terminal 2
3. The caban signal processing section 3 includes a telephone line input terminal 31, an image signal output terminal 32, and an image selection signal input terminal 33. The switch 4A includes a common contact a, contacts S and C, and a switching signal input terminal e.

The switch 4B includes a common contact 0, a contact 1, and a switching signal input terminal j. The switch control circuit 5 includes a detection signal input terminal 51, a switching signal output terminal 52, and a termination signal input terminal 53. The carrier wave detection circuit 6 includes a telephone line input terminal 61 and a detection signal output terminal 62.

The remote control receiving section 7 includes an infrared receiving section 71, an image selection signal output terminal 72, and an end signal output terminal 73.

The remote control transmitter 8 includes a key button group 81 and an infrared transmitter 82.

The antenna 10 is connected to the antenna input terminal 21 of the teletext signal processing section 2, the image signal output terminal 22 is connected to the contact of the switch 4A, and the image selection signal input terminal 23
is connected to the uniformity selection signal output terminal 72 of the remote control receiving section 7. The teletext signal processing unit 2 is a conventional circuit, and when the teletext signal from the antenna 10 is input to the antenna input terminal 21, the signal is processed into a color television receiver used for home use. The image signal is processed into a signal format that can be displayed on the machine, and the result is output to the image signal output terminal 22. Also, the picture
mm selection signal <r> to ll1lB selection signal input terminal 23
is input, the image signal output terminal 2 is output according to the signal.
The uniform signal output to 2 can be changed.

The telephone line input terminal 31 of the captain signal processing section 3 is connected to the contact of the switch 4B, and the image signal output terminal 32
is connected to the contact C of the switch 4A, and the image selection signal input terminal 33 is connected to the image selection signal output terminal 7 of the remote control receiver 7.
Connected to 2.

The captain signal processing unit 3 is also a conventional circuit, and when a captain signal is input to the telephone line input terminal 31, the signal is transmitted to the home television, as in the case of the teletext signal processing unit 2. The signal is processed into a signal format that can be displayed on a television receiver (this is the same format that is processed by the teletext signal processing unit 2), and the result is sent to the image signal output terminal Output. Furthermore, when the image selection signal @(f) is input to the image selection signal input terminal 33, the image signal output to the image signal output terminal 32 is changed according to the signal.

The common contact a of the switch 4A is connected to the color television receiver 9, and the switching signal input terminal e is connected to the switching signal output terminal 52 of the switch control circuit 5. Switch 4A is
For example, it is composed of a relay, and when the switching signal (k) input to the switching signal input terminal e is at a low level, the common contact a is connected to the contact s (solid line in the figure), and the teletext signal is The image signal from the processing section 2 is output to the color television receiver-III 9, and it is turned off! When the signal (k) is at a high level, the common contact a is connected to the contact C (dotted line in the figure), and the image signal from the captain signal processing section 3 is output to the color television receiver 9. Switch 4B also
For example, it is composed of a relay, and when the switching signal (k) input to the switching signal input terminal J is at a low level, the common contact Q is connected to the contact 1 (solid line in the figure), and the telephone line 11 is connected to the carrier wave detection circuit. When the switching signal @(k) is at a high level, the common contact Q is connected to the contact terminal (dotted line in the figure), and the telephone line 11 is connected to the captain's signal processing unit 3. Connect to the telephone line input terminal 31 of.

The switch control circuit 5 to remote control transmitter 8 will be explained with reference to FIGS. 2 to 6.

Figure f7!42 is a block diagram showing details of the carrier detection circuit 6. In addition to the above-described telephone line input terminal 61 and detection signal output terminal 62, the carrier wave detection circuit 6 further includes a resonance circuit 63 connected to the telephone line input terminal 61,
A detection circuit 64 connected to the resonance circuit 63 and a detection circuit 6
4 and an amplifier circuit 65 connected to the 4. Amplification circuit 65
The output section of is connected to the detection signal output terminal 62. Captain's signal 2.650H to telephone line input terminal 61
When the carrier wave (1) of No. 2 is input, the carrier wave that has passed through the resonance circuit 63 is detected by the detection circuit 64 and amplified by the amplifier circuit 65 to become a detection signal (i+) and output to the detection signal output terminal 62. . The waveforms of the carrier wave (1) and the detection signal (-) at this time are shown in FIG. That is, when the carrier wave (1) is input to the telephone line input terminal 61, the detection signal (Peng) output to the detection signal output terminal 62 is at a high level.

FIG. 3 is a block diagram showing details of the switch control circuit 5. As shown in FIG. The switch control circuit 5 has the aforementioned detection signal input terminal 51. In addition to the switching signal output terminal 52 and the termination signal input terminal 53, it further includes a JK type flip-flop 54 connected to the detection signal input terminal 51, and an amplifier circuit 55 connected to the JK type flip-flop 54. The output section of the amplifier circuit 55 is connected to the switching signal output terminal 52. When a high level detection signal (-) is input to the input terminal of the JK type knob 70, the knob 54 outputs that signal to O.
It outputs to the Q output terminal until a high level end signal (n) is input to the L input terminal. The amplifier circuit 55 amplifies the output of the Q output terminal and outputs it to the switching signal output terminal 52 as a switching signal jl(k).

The waveforms of the detection signal (-), switching signal (k) and termination signal (n) at this time are shown in FIG.

FIG. 5 is a block diagram showing details of the remote control transmitter 8. As shown in FIG. The remote control transmitter 8 has a teletext key button 8f.
The key button group 81 includes a key button group 811 and a captain key button group 812, an encoder 83 connected thereto, and an infrared transmitter 8i382 connected thereto. The teletext key button group 811 includes key buttons for selecting teletext images. Captain key button group 81
2 includes a key button for selecting the captain's image and a key button for terminating the captain's communication. for example,
Key button to select the captain's image (for example, G
2...Gn) is pressed, the encoder 83 outputs a predetermined code to the infrared transmitter 82 accordingly. The infrared transmitter 82 that receives this converts the code into an amplitude modulated waveform and then outputs an infrared signal.

A key button that ends the captain's communication (for example, G
, ) is pressed. The above operation is exactly the same even when a key button for selecting a teletext image is pressed.

FIG. 6 is a block diagram showing details of the remote control receiving section 7. As shown in FIG. The remote control receiving section 7 includes an infrared receiving section 71, a decoder 74 connected thereto, signal transmitting sections 75, 76 connected thereto, and an image selection signal output terminal 72.76 which is an output section of these sections. A termination signal output terminal 73 is provided. The infrared receiving section 71 receives the infrared signal outputted above, performs photoelectric conversion on the infrared signal, and outputs the converted signal to the decoder 74. The decoder 74 performs amplitude demodulation and then decodes the code. If the key button (G,) for ending the captain's communication is pressed in the remote control transmitter 8, the decoder 74 outputs a high-level pulse signal to the signal transmitter 76. The signal sending section 76 outputs the high level signal to the end signal output terminal 73. If the key button for selecting the captain's image is pressed in the remote control transmitter 8, the decoder 74 outputs a corresponding signal to the signal transmitter 75. Signal sending section 75
converts the signal to a level suitable for the input conditions of the teletext signal processing unit 2 and the captain signal processing unit 3.
After that, it is outputted to the image selection signal output terminal 72 as the image selection signal (f). The above operation is performed by the remote control transmitter 8.
The same applies when the teletext key button is pressed in .

Next, based on the above explanation, the overall operation of FIG. 1 will be explained with reference to FIGS. 7 and 8.

First, the normal state will be explained. In a normal state, since no captain signal is input to the image information terminal device 1 according to the present invention, the detection signal (-) and the switching signal (k) are at a low level.

Therefore, the common contact a of the switch 4A is connected to the contact point I, and the common contact point 9 of the switch 4B is connected to the contact I (solid line in FIG. 1). Therefore, in this state, antenna 1
The teletext signal input from 0 to the teletext signal processing section 2 is processed by the teletext signal processing section 2 and then sent to the switch 4.
It is input to the color television receiver 9 via A,
A teletext image is displayed on a color television receiver 9.

If you want to change the display screen, you can operate the key button group 81 on the remote control transmitter 8.

Next, the captain image is received on a color television.
9 will be explained below. FIG. 1117 is a flowchart for displaying the captain image on the color television receiver 9. When the receiver of the telephone 12 is picked up in step S1 and the dial of the telephone 12 is turned in step S2, the image information terminal device 1 according to the present invention is connected to the center in step S3. In step S4, the center sends a captain's signal to the image information terminal device 1 according to the present invention. The 2.650 Hz carrier wave (1) of this captain's signal is input to the carrier wave detection circuit 6 via the telephone line 11 and the switch 4B.

In step S5, the carrier wave detection circuit 6 outputs a high level detection signal (■) to the switch control circuit 5. In step S6, the switch control circuit 5 outputs a high level switching signal (k) to the switches 4A and 4B. In step s7, the common contact a of the switch 4A is connected to the contact C, and the common contact g of the switch 4B is connected to the contact point (see the dots in the middle of FIG. 1). As a result, step s8
, the captain's signal input from the telephone line 11 is input to the captain's signal processing section 3 via the switch 4B, and is processed by the captain's signal processing section 3.
The signal is input to the color television receiver 9 via the switch 4A. Therefore, the captain image is displayed on the color television receiver 119. Yu, who confirmed this,
In step s9, the handset of the telephone 12 is hung up.

If you want to change the display screen, in step 810,
If you operate the key button group 81 on the remote control transmitter 8,
At step 811, an image is selected.

Finally, the case of terminating the captain's communication will be explained. FIG. 8 is a flowchart for terminating the captain's communication. In step 812, when the key button (G1) of the key button group 81 on the remote control transmitter 8 is pressed to end communication with the captain, the remote control receiver 7 sends an end signal to the switch control circuit 5 in step 813. Output (n). Step S1
4, the switch control circuit 5 is a switch 4A.

A low level switching signal (k) is output for 4B.

In step 815, common contact a of switch 4A is connected to contact 1, and common contact O of switch 4B is connected to contact 1. Since the handset of the telephone 12 is off, the line is disconnected in step 816, and the captain's communication ends in step 317. And switch 4
When A returns to normal state, the teletext picture will change to color.
It is displayed on the TV receiver 9. Through the above steps, the normal state is returned to.

As described above, according to the present invention, it is possible to select and display a teletext image or a captain's image on one common color television receiver, and moreover, the selection is inputted via a telephone line. This has the advantage that this can be done automatically using the carrier wave of the captain's signal.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the invention. FIG. 2 is a block diagram showing details of the carrier detection circuit. FIG. 3 is a block diagram showing details of the switch control circuit. FIG. 4 is a diagram showing each signal waveform of FIG. 12 and FIG. 3. FIG. 5 is a block diagram showing details of the remote control transmitter. FIG. 6 is a block diagram showing details of the remote control receiving section. FIG. 7 is a flowchart for displaying a captain image on a color television receiver. FIG. 8 is a flowchart for terminating the captain's communication. In the figure, 1 is an image information terminal device according to the present invention;
2 is a teletext signal processing unit, 3 is a captain signal processing unit, 4A and 4B are switches, 5 is a switch control circuit, 5
4 is a JK type flip-flop 55 is an amplifier circuit, 6 is a carrier detection circuit, 63 is a common I& circuit, 64 is a detection circuit, 6
5 is an amplifier circuit, 7 is a remote control receiver, 8 is a remote control transmitter, 81 is a key button group, 9 is a color television receiver, 10 is an antenna, 11 is a telephone line, 12 is a telephone set,
<f) is the image selection signal, (k) is the switching signal, (m)
is a detection signal, (n) is a termination signal, and (1) is a carrier wave. Agent Shin Kuzuno - (1 other person) Figure 7 Figure 8

Claims (6)

[Claims] (1) A teletext signal processing unit that processes the teletext multilayer broadcast signal, a captain signal processing unit that processes the text and graphic information network signal, and a carrier wave detection circuit that detects the information carrier wave of the text and graphic information network. , a first switch for switching and outputting either the output of the teletext signal processing section or the output of the captain signal processing section to the television receiver; and a first switch for outputting the signal from the telephone line to the captain signal processing section a second switch that switches to and outputs either the carrier wave detection circuit or the carrier wave detection circuit; and a switch lll11 circuit that switches and controls the first switch and the second switch in response to the output from the carrier wave detection circuit. An image information terminal device comprising: (2) Claim 1, wherein the carrier detection circuit includes: a resonant circuit that resonates with the carrier wave; a detection circuit that detects the carrier wave; and an amplifier circuit that amplifies the output from the detection circuit. The image information terminal device described. (3) The I according to claim 1 or 2, wherein the switch control circuit includes: a JK type rough flip-flop; and an amplifier circuit that amplifies the output from the flip-flop.
m-image information terminal device. (4) The image information terminal device according to any one of claims 1 to 3, wherein the switch is a relay. (5) A key button group comprising a plurality of key buttons, means for encoding and transmitting signals from the key button group, and means for receiving the encoded signal and decoding the signal. The image information terminal device according to any one of claims 1 to 4, further comprising: the switch control circuit being controlled by the decoded signal. (6) The decoded signal further selectively controls an image output from the teletext signal processing section or the captain signal processing section. The image information terminal device according to any one of the above.