JPH0993365A - Line controller for television receiver and telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent crosstalk by detecting a voltage or a current at a terminal by a control section so as to recognize the operating state of a telephone set thereby realizing the connection such as a telephone line, a television receiver and a device or the like with a simple cable. SOLUTION: A control section 130 detects a current or voltage at terminals 61, 62 so as to discriminate whether or not a telephone line is in use by another device, and when a telephone set 120 is in use, switches S1, S2 are not open to takes precedence of the use of the telephone set 120 over other devices. When a viewer inputs an operation signal and automatic dialing is going to be started, the control section 130 informs it to a CPU of a decoder that the telephone set 120 is in use at present and a message of 'telephone set is busy now' is displayed on a screen by a display control section. When the telephone set 120 is not in use and the control section 130 receives a command of data communication from the CPU, the switches S1, S2 are open and dialing is made and data transmission is started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line control device for a television receiver and a telephone, which receives and processes a data broadcast signal such as a character figure or the like to be broadcast included in a television broadcast signal, and executes a program operation. It is applied to a system that communicates with the outside through a telephone line.

[0002]

2. Description of the Related Art A character broadcasting program has been realized in which character or graphic data is multiplexed and transmitted with an ordinary television broadcasting signal. Currently available teletext programs include news, weather forecasts, traffic information, tourist information, and TV shopping. In addition, there is a case where a questionnaire survey is performed to a viewer in a program.

By the way, the current teletext program is a system in which information is unilaterally provided to a viewer from a television station. For example, in the case of TV shopping, when a shopping information program is broadcast by teletext, the viewer makes a memo of the desired product number or mail order company's telephone number while watching the characters displayed on the screen, and sees the memo. While making phone calls using a telephone, he will place orders and orders. Also, in the case of conducting a questionnaire survey to the viewer in the program, the viewer takes notes such as a telephone number for responding, and responds using the telephone while looking at the memo. In such a case, a problem such as a wrong telephone call due to a wrong dial or a wrong telephone call when a telephone number is erroneously written down occurs.

As described above, in the conventional character multiplex broadcast program, a one-way broadcast from a television station is performed, and the response is long because the system waits for a telephone call from the viewer. In addition, there is a problem that many wrong calls are generated.

In order to solve such a problem, therefore, a program executing means for transmitting computer program data from a broadcasting station side in a character multiplex broadcasting program and executing the computer program is provided in a receiver.
It has been proposed that the program executing means dials the telephone automatically through the communication control means when the viewer gives an operation input and automatically transmits the input data of the viewer. ing. This way,
The number of false calls is reduced, and the response time to the collection station is near real time. Hereinafter, a program that sends a computer program as described above or sends supplementary data that supplementarily describes a main broadcast program is called a complementary program, and a computer program is called a script.

[0006]

When the above system is actually installed in the home, various studies are required. It is the connection relationship between the television receiver, the telephone line, and the telephone. At home, the telephone and the TV receiver are not necessarily installed close to each other, but may be installed in separate rooms. Therefore, interference occurs when the above-mentioned television receiver performs automatic dialing while using the telephone. The opposite case is also possible. In addition, the outlet part of the telephone line from the outside and the installation location of the conventional telephone are
It's relatively close, but because the TV receiver isn't near it, you'll need to run a cable. In this case, it should be devised so that the structure is as simple as possible.

Therefore, in the present invention, a telephone line drawn from the outside, a television receiver having a telephone function, and a device (a telephone or a facsimile with a telephone) having a telephone function different from the television receiver are connected. It is an object of the present invention to provide a television receiver and a telephone line control device which can be realized with a cable as simple as possible and which is free from interference and has excellent usability.

[0008]

According to the present invention, there are provided first and second terminals to which first and second lines for a telephone line led from the outside are connected, and at least a third and a spare. An outlet part having third and fourth terminals to which the line 4 is connected, a television receiver having a telephone function part, and a telephone function part, which is a device different from the television receiver,
A device having fifth and sixth terminals for a telephone line and at least a seventh and an eighth terminal for a spare line, the outlet part, a television receiver, and the device. In order to interconnect the two, the line control unit of the television receiver has ninth and tenth terminals for connecting a telephone line,
At least eleventh and twelfth terminals for spare, first and second switches for connecting / disconnecting the ninth and tenth terminals to the eleventh and twelfth terminals, respectively, and While outputting a control signal for controlling the first and second switches, transmitting and receiving a signal to and from the ninth and tenth terminals, and further detecting a signal at the eleventh and twelfth terminals and the eleventh, And a control unit capable of outputting a specific signal to the twelfth terminal, wherein the connection cable connects between the first terminal and the ninth terminal and between the second terminal and the tenth terminal, respectively. Line, a line connecting the third terminal and the seventh terminal, and a line connecting the fourth terminal and the eighth terminal, respectively, the eleventh terminal, the fifth terminal, and the twelfth terminal. And a wire for connecting between the sixth terminal and the And a down.

With the above-mentioned structure, the control section is configured such that the first section
By detecting the voltage or current at the first and twelfth terminals, the usage status of the telephone can be recognized. The control unit disconnects the telephone by turning off the first and second switches, connects the television receiver to the telephone line, and connects the telephone to the telephone line by turning on the first and second switches. be able to. Further, the control unit can output the specific signal to notify other devices that the videophone is in use.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a system to which a two-way communication device using television broadcasting, which is an embodiment of the present invention, is applied. This system, by utilizing the current character multiplex broadcasting function and telephone communication function, adds a telephone communication function to one-way broadcasting of television broadcasting and expands an upstream data transmission function, The two-way communication function is realized as a whole. This system basically extends the existing teletext system by software. Therefore, even if you add a script to the character multiplex broadcast and broadcast it,
It has no effect on current TV broadcasts, teletexts, and TV receivers.

The overall system is composed of a network including a TV receiver 11, a broadcasting station 12, a telephone network 13, and a collecting station 14. The broadcasting station 12 uses a teletext channel to broadcast a script, which is a computer program for realizing bidirectionality, in a complementary program in synchronization with a normal television program. Alternatively, it is repeatedly broadcast as an independent broadcast within a predetermined broadcast time.
This script is a kind of application program that describes the progress procedure of the two-way communication system.
The V broadcast signal is superimposed and transmitted during the vertical blanking period.

The script is a T that receives a TV broadcast signal.
It is stored in the memory of the V receiver 11 and is executed by, for example, a program execution device (script decoder) incorporated in the TV receiver 11. This script decoder displays a symbol mark indicating that the current program is a complementary program, for example, "i", notifies the viewer of it, and starts script execution in response to an operation input from the viewer. , Respond such as display of program supplement data.

Although the response from the viewer may end in the TV receiver 11 by itself, the result of the response may be sent to a computer system (collection station 14) provided in various places via the telephone network 13. Sending, and in some cases, broadcasting station 12
It is also possible to reflect in real time on the program content provided by. In addition, the collection station 14 via the telephone network 13.
It is also possible to take in data from the side.

The TV receiver 11 is equipped with a script decoder and a modem in order to realize a bidirectional function in addition to an ordinary TV broadcast receiving circuit including a character multiplex decoder. The script decoder extracts a script from a TV broadcast signal transmitted from the broadcast station 12 and executes the script to realize two-way communication. When the viewer responds to send the upstream data, the viewer responds by using the remote controller for TV operation. When data is transmitted to the collection station 14, automatic dialing is performed by a modem connected to the TV receiver 11, and connection is made to the collection station 14. The uplink data may be transmitted immediately or may be transmitted after waiting at night or the like.

Since the modem added to the TV receiver 11 has a function of automatically dialing, it is not necessary for the viewer to dial for upstream data transmission. The telephone number of the automatic dial destination is the broadcasting station 12 for each complementary program.
It is embedded in the script from the side and sent. There may be one telephone number or a plurality of telephone numbers. In the case of a plurality of telephone numbers, the viewer can select a destination.

The script decoder is realized by a processor that executes a computer program. However, since the character multiplex decoder also usually has a built-in processor, the script decoder is actually realized by expanding the function of the character multiplex decoder in software. Therefore, the script decoder includes a character multiplex decoder and a program ROM, and shares many circuits with the character multiplex decoder.

When broadcasting a program of a viewer participation system in which the viewer's response is reflected in the program, the broadcasting station 12 adds a supplementary program data including a script to a broadcast signal including normal video / audio. Insert and send. A program production system for generating and inserting data of a complementary program including a script can be composed of a personal computer and a multiplexer.

The broadcasting station 12 broadcasts by inserting a supplementary program into the broadcast wave in addition to a normal program. The computer programs to be added are roughly classified into those produced by the broadcasting station itself and those produced and provided by third parties such as advertising companies and mail order companies. Furthermore, there are those produced by broadcasting stations that can be prepared in advance, and those that are inserted live, such as when broadcasting sports.

Here, the structure of the script will be described. The script is created by the production system of the broadcasting station 12, and is sent together with normal images and sounds. The script is realized as a set of objects as follows.

(1) Background / display material (2) Operation button (3) Character string (4) Image, etc. Each object can have a complementary procedure (procedure), which is an extended BASIC language. Described by etc. This language is a normal BASIC language with control instructions for two-way communication.

When the script is executed, first, the screen background and screen components such as operation buttons are displayed. When the viewer selects the operation button, a program corresponding to the button is activated.

A method of processing response data is registered in advance in the collecting station 14, and the collected contents can be redistributed to a broadcasting station, an advertising company, a sponsor, a mail order company, etc. in accordance with the method.

The forms of interactive programs that can be realized by this interactive communication system can be roughly classified into the following three types. (1) Complementary data program-Selective display of additional information about advertising products.

Display selectively the data during sports broadcasting.・ Display the program contents.・ Memorize the cooking resapies and display them later.

Respond to answers to questions in early childhood education programs.・ Respond to viewers' answers in quiz programs. (2) Response feedback program (use the collecting station) -Take questionnaires on politics, economics, and social reporting.

-Take questionnaires on sports programs.・ Display stats of correct respondents and tournaments in viewer participation quiz programs. (3) Program with transaction (use collection station) -Orders will be accepted at the server (collection station) through TV shopping.

A server (collection station) accepts a catalog request or the like in an advertisement with a request such as information. -For audience rating survey, send the viewing program data to the server (collection station) with the consent of the viewer.

FIGS. 2A and 2B show a period in which teletext data is transmitted in a TV teletext broadcast signal of a hybrid transmission system. That is, the teletext data is the 14th H (277H) to the 16th H (279H), and the 21th H (284H) in the vertical blanking period.
Is superimposed on. In this vertical blanking period, there is a margin for further multiplexing of data, so for example, the 10th H (second
73H) to 13th H (276H) can be multiplexed and transmitted. Although the script may be multiplexed at a position different from the current character multiplex position in this way, it may be time-divisionally transmitted to the same position as the current character multiplex signal. Also, teletext data can be transmitted on one sub-channel of the audio multiplex signal, and in this case, the data from the FM receiving unit is taken in.

FIG. 3 shows in more detail an example of the structure of a data packet in one line period transmitted in the character multiplex broadcast and the data broadcast. A bit synchronization code and a byte synchronization code are arranged before the data packet. The data packet section includes a prefix, a data block, and a check code. Further, the prefix part includes a service identification code and a packet control code. This service identification code can be used to identify the arrival of the complementary program signal.

FIG. 4 shows a specific circuit configuration of a bidirectional communication device provided in the TV receiver 11, a decoder including a character multiplex broadcast decoder and a script decoder, that is, a character multiplex and data broadcast decoder. .

The video signal of the reception channel is input terminal 21.
It is supplied to the sync separation unit 22 and the A / D converter 23 via. In the vertical blanking period of the video signal, data for bidirectional digital communication is multiplexed as described in FIG.
The data digitized by the A / D converter 23 is waveform-equalized by the waveform equalization unit 24 and the data acquisition / error correction unit 2
5 is introduced. The waveform equalizer 24 compensates for deterioration of the video signal converted into a digital signal during transmission.
Separates the digital broadcast signal multiplexed with the video signal,
The multiplexed data and clock in it are output. The data fetching / error correcting unit 25 fetches the multiplexed data in units of 8 bits in the buffer RAM 26 in synchronization with the clock and performs error correction.

The CPU 27 operates based on the fixed program stored in the program ROM 28. Character font RO
A character font for displaying characters is stored in M29, and corresponding character data can be read out by addressing a desired character to the ROM 29.

A synchronizing signal for display synchronized with the TV receiver is introduced to the input terminal 30 and supplied to the display control section 31. The display control unit 31 performs a process of reading the data in the display memory 32 in synchronism with the reproduction of the television image and writing the display data to the display memory 32 in response to a write command from the CPU 27. Display memory 3
The data read from No. 2 is stored in the color map memory 33.
Is supplied as an address input, and each level data of the primary color signals RGB corresponding to the address is output. This level data is converted into an analog RGB signal by the D / A converter 34 and is derived from the output terminal as a display signal. It should be noted that this display signal is displayed on the display as a television image signal in which graphics are superimposed by synthesizing the television image signal by a synthesizing means (not shown). Further, the D / A converter 34 is
Omitted depending on the interface on the display side,
The RGB signals themselves may be output.

From the input terminal 36, an operation signal by the viewer from the remote control operation unit is input. This operation signal is sent to the CPU via the operation input interface (I / F) 37.
It is taken in 27 and analyzed.

38 is a modulator and demodulator (modem),
It constitutes a communication control unit and is connected to the telephone line via the line connection unit 39. The line connection unit 39 connects the line,
It controls disconnection and is controlled by the CPU 27.

The CPU 27 is connected to each functional block, that is, the data fetching / error correcting unit 25, the program ROM 28, the character font ROM 29, the operation input I / F 37, the display control unit 31, the modem 38, etc. via a bus line. . Further, a work RAM 41, a program RAM 42, and a non-volatile memory 43 are connected to the bus line.

The program RAM 42 is a memory for storing a computer program transmitted from a broadcasting station,
According to the viewer's operation, the contents of this computer program can be interpreted and the procedure of this computer program (script) can be executed according to the interpreter in the fixed program stored in the ROM 28. The non-volatile memory 43 stores a unique identification number (ID) of this receiving terminal (decoder), and this unique identification number is used when transmitting order data to the collecting station 14 in, for example, TV shopping. To be done. The collection station 14 determines the orderer by recognizing the ID.

The circuit configuration described above is also used when processing a character multiplex broadcast program. That is, when the reception of the character multiplex broadcast program is instructed by the remote control operation, the CPU 27 is switched to be under the control of the character multiplex broadcast program processing program stored in the program ROM 28. Then, the character data sent is the character font R
It is converted into display data by the OM 29 and stored in the display memory 32 via the display control unit 31.

FIG. 5 shows a line control device for a television receiver and a telephone according to an embodiment of the present invention. First, the outlet 100 is exposed on the indoor wall. The outlet unit 100 has first and second terminals 51 and 52 to which first and second lines for a telephone line guided from the outside are connected, and at least third and fourth lines which are spares. It has the 3rd and 4th terminals 53 and 54 connected.

On the other hand, the telephone 120 has a telephone function unit and is a device different from the television receiver, and has fifth and sixth terminals 55 and 56 for telephone lines and a spare line. Of at least the seventh and eighth terminals 57 and 58. Although a telephone is shown in this figure, it may be a facsimile machine.

In order to connect the outlet 100, the television receiver 11 and the telephone 120 to each other, the line controller of the television receiver is constructed as follows. That is, this line control unit is configured inside the line connection unit 39, and has ninth and tenth terminals 59 and 60 for connecting a telephone line and at least the eleventh and first terminals for a spare.
It has two terminals 61 and 62. Furthermore, the ninth and tenth
Terminals 59 and 60 of the eleventh and twelfth terminals 6 respectively.
1 and 62 respectively have first and second switches S1 and S2 which are connected / disconnected. Furthermore, a control signal for controlling the first and second switches S1 and S2 is output, and a signal is transmitted and received to and from the ninth and tenth terminals 59 and 60, and further, an eleventh and twelfth terminal 61. , 6
2 signal detection and the eleventh and twelfth terminals 61 and 6
2 has a control unit 130 capable of outputting a specific signal.

Next, the connection cable 140 is prepared.
This connection cable 140 is T-shaped and has connectors T1, T2, T3 at each end. The connector T1 corresponds to the outlet 100, the connector T3 corresponds to the television receiver 11, and the connector T3 corresponds to the telephone set T2. Then, the lines 141 and 142 for connecting the first terminal 51 and the ninth terminal 59, the second terminal 52 and the tenth terminal 60, respectively, the third terminal 53 and the seventh terminal 53.
157, the fourth terminal 54, and the lines 143 and 144 for connecting between the eighth terminal 58, the eleventh terminal 61 and the fifth terminal 55, the twelfth terminal 62 and the sixth terminal, respectively. Lines 145 and 1 for connecting 56 to each other
46.

Reference numeral 150 denotes the connection cable 140 and the telephone 1.
A cable for extension between 20 and a line 151 for connecting the line 143 and the terminal 57 of the telephone 120,
Line 15 for connecting between line 144 and terminal 58
2, a line 153 for connecting between the line 145 and the terminal 55, and a line 154 for connecting between the line 146 and the terminal 56.

Next, the function of the control unit 130 will be described. In the drawing, the outlet part 100 and the connection cable 14
0, the extension cable 150, the telephone 120, and the television receiver 11 are separated, but it is assumed that they are normally connected now. Further, the control unit 130 turns on the switches S1 and S2 when the telephone line and the television receiver are not connected. When connecting the telephone line and the television receiver, the switch S is switched by the control signal.
1 and S2 are turned off.

When the telephone 120 is used, the terminal 55 of the telephone 120 is connected to the line 153, the line 145, the terminal 61, the switch S1, the terminal 59, the line 141 and the terminal 51. Further, the terminal 56 of the telephone 120 includes a line 154, a line 146, a terminal 62, a switch S2,
It is connected to the terminal 60, the line 142, and the terminal 52. When the telephone 120 is used, the current at the terminals 61 and 62 increases (the voltage decreases) in the above connection path. The control unit 130 detects this and determines whether or not the telephone 120 is currently used.

When the telephone 120 is in use, the control unit 130 does not turn off the switches S1 and S2, but gives priority to the use of the telephone 120. In such a state, when the viewer inputs an operation signal to access the complementary program and the automatic dialing is started,
The control unit 130 notifies the CPU 27 of the decoder that the telephone 120 is currently in use. Then CPU27
The display control unit 31 can display, for example, a message "currently using the telephone line" on the screen.

When the telephone 120 is not in use,
When the data transmission command is given from the CPU 27, the control unit 130 turns off the switches S1 and S2, performs dialing, and starts data transmission. FIG. 6 shows a flowchart showing the above operation. The control unit 130 detects the current or voltage at the terminals 61 and 62, determines whether or not the telephone line is being used by another device, and if not, performs automatic dialing and performs communication through the telephone line ( In steps A1 to A4), if another device is using the telephone line, a message is displayed on the display unit (step A5).

On the contrary, when the control unit 130 tries to use the telephone 120 during a telephone call, this system causes the terminals 61 and 62 and the lines 145, 146, 153 and 154.
Through, a specific transmission signal is output from the control unit 130, which can be heard on the telephone 120 side. This allows the user to know that the television receiver 11 side is currently using the telephone line.

FIG. 7 shows a structural example of the control unit 130. The terminals 59 and 60 are voltage / current detectors 210,
It is connected to the incoming call detector 211 and the transmission circuit 212.
The detection result of the voltage / current detector 210 is introduced into the microcomputer 213. The detection signal of the incoming call detector 211 is also input to the microcomputer 213. The signal for transmission output from the microcomputer 213 is supplied to the transmission circuit 212. The terminals 61 and 62 are connected to another device control circuit 214. Other device control circuit 21
4 outputs a specific signal under the control of the microcomputer 213, and when the control unit 130 is in a call, another telephone 12
When 0 is used, a tone sound is output. Reference numeral 215 denotes a display circuit, which is controlled when displaying a message such as line in use on the display unit.

FIG. 8 shows a configuration example of another device control circuit 214. Another device, the telephone 120 in the above example
When an attempt is made to use, the light receiving element detects the output of the light emitting element in the detector 221, and transmits this to the microcomputer 213. Then, the microcomputer 213 controls the tone signal generator 222 to control the terminal 62.
The tone signal is output to the line.

The switches S3 and S4 perform the opposite switching operation to the switches S1 and S2. Further, the control unit 130 controls the television receiver 11 when the currents of the terminals 61 and 62 change from a predetermined value or more to a predetermined value or less, or when the voltage changes from a predetermined value or less to a predetermined value or more. When a command for connecting to a telephone line is detected, it also has a function of automatically performing a telephone line connection process and transmitting a transmission signal.

FIG. 9 shows the appearance of the connection cable 140 described above. In the above-described embodiment, when the telephone 120 is being used and the user tries to use the telephone function of the television receiver 11, a message is displayed on the screen. But this message or warning
The display on the screen is not limited, and a warning may be displayed on a part of the television receiver. Also, instead of displaying it when trying to use the telephone function of the television receiver 11, when the telephone is being used, a red (or telephone mark) warning is always displayed and the telephone is being used. When it is not open, it may be displayed in blue.

Furthermore, while the telephone is being used, the viewer may be notified by voice when trying to use the videophone. For example, it may be notified that "the telephone line is currently in use". Further, when the use of the telephone is finished, the viewer may be informed by voice, for example, "The telephone line can be used now". Furthermore, when the user tries to use the telephone while the videophone is being used, the voice may be used to notify that the videophone is currently being used instead of the tone sound.

Further, the control unit 130 is also provided with a safety measure function for data communication. Control unit 130
Sends out a signal to a telephone line by a videophone, and has a function of comparing a signal in a stage before sending out with a signal on the line after sending out. If they match, it recognizes that the signal is normally transmitted, and if they do not match, it has a function of assuming that the signal is damaged due to noise or the like and retransmitting. Further, in the case of performing the first transmission and the retransmission, it also has a function of displaying a message for distinguishing between the first transmission and the retransmission on the display unit.

Furthermore, the control unit 130 may also have the following functions. In other words, it also has a function of instructing a specific service station not to transmit to its own telephone by interrupting before attempting to start a videophone. If a ringing tone (call waiting) is played during an own call due to interruption, the transmitted data may be damaged, so such safety measures are also taken.

[0056]

As described above, according to the present invention, a telephone line drawn from the outside, a television receiver having a telephone function, and a device having a telephone function different from the television receiver (telephone or with a telephone) Connection such as facsimile)
It can be realized with a cable as simple as possible, and further, interference can be prevented and usability can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a system to which a data broadcast transmission and reception device of the present invention is applied.

FIG. 2 is an explanatory diagram of character multiplex and data broadcasting signals.

FIG. 3 is a diagram showing an example of data packets of character multiplex and data broadcasting signals.

FIG. 4 is a diagram showing a character multiplex and data broadcast decoder according to the present invention.

FIG. 5 is a diagram showing an example of an embodiment of the apparatus of the present invention.

FIG. 6 is a flowchart shown to explain an operation example of the apparatus of the present invention.

FIG. 7 is a diagram showing an example of a control unit in FIG.

FIG. 8 is a diagram showing an example of another device control circuit of FIG. 7.

9 is a diagram showing an appearance of a connection cable 140 of FIG.

[Explanation of Codes] 11 ... TV receiver, 12 ... broadcasting station, 13 ... telephone line network,
14 ... Collection station, 22 ... Sync separation section, 23 ... A / D converter, 24 ... Waveform equalization section, 25 ... Data acquisition / error correction section, 26 ... Buffer RAM, 27 ... CPU, 28 ... Program ROM, 29 ... Character font ROM, 31 ... Display control unit, 32 ... Display memory, 33 ... Color map memory, 34 ... D / A converter, 37 ... Operation input I / F, 38
... Modem, 39 ... Line connection section, 41 ... Work RAM, 42
... program RAM, 43 ... non-volatile memory, 100 ... outlet section, 120 ... telephone, 130 ... control section, 140 ... connection cable, 150 ... extension cable.

Claims (9)

[Claims] 1. A first for an externally guided telephone line,
The first and second terminals to which the second line is connected, and the third to which at least the third and fourth lines which are spares are connected,
An outlet part having a fourth terminal, a television receiver having a telephone function part, and a telephone function part, which is a device different from the television receiver, and is a fifth or sixth device for a telephone line. A terminal and a device having at least a seventh and an eighth terminal for a spare line; and the television receiver for interconnecting the outlet part, the television receiver, and the device. The line control unit of the 9th and 10th terminals for connecting a telephone line, at least the 11th and 12th terminals for backup,
And a first and second switch for connecting / disconnecting the tenth and tenth terminals to the eleventh and twelfth terminals, respectively, and a control signal for controlling the first and second switches, and A control unit capable of transmitting and receiving a signal to and from the ninth and tenth terminals, and further detecting a signal at the eleventh and twelfth terminals and outputting a specific signal to the eleventh and twelfth terminals. And a connection cable, wherein the first terminal and the ninth terminal, the line connecting the second terminal and the tenth terminal, respectively, the third terminal and the seventh terminal, A line connecting between the fourth terminal and the eighth terminal, a line connecting between the eleventh terminal and the fifth terminal, and a line connecting between the twelfth terminal and the sixth terminal, respectively. Of TV receiver and telephone Line control device. 2. The control section maintains the ON state of the first and second switches when the currents at the eleventh and twelfth terminals are above a predetermined value or when the voltage is below a predetermined value. The line control device for a television receiver and a telephone set according to claim 1. 3. The control unit connects the television receiver to the telephone line when the currents at the eleventh and twelfth terminals are above a predetermined value or when the voltage is below a predetermined value. 3. The line control of the television receiver and the telephone set according to claim 2, further comprising means for displaying a message indicating that the telephone line is currently in use on the display section of the television receiver when the command is detected. apparatus. 4. The control unit, when the current of the eleventh and twelfth terminals changes from a predetermined value or more to below a predetermined value or when the voltage changes from below a predetermined value to above a predetermined value. 4. The television receiver according to claim 3, further comprising means for automatically performing a telephone line connection process when a command for connecting the television receiver to the telephone line is detected. Line control device for telephones. 5. The line of a television receiver and a telephone line according to claim 3, wherein the display portion is either a television screen or a light emitting means provided in a portion different from the television screen. Control device. 6. The television receiver, when detecting a command for connecting the television receiver to the telephone line while maintaining the first and second switches in an on state. 3. The line control device for a television receiver and a telephone set according to claim 2, further comprising means for outputting a message sound indicating that the telephone line is currently in use by utilizing the voice output section of the John receiver. 7. The control unit turns off the first and second switches in response to the control signal when a call is being made through the ninth and tenth terminals. The line control device for the television receiver and the telephone set forth. 8. The control unit detects voltage or current at any of the eleventh and twelfth terminals while maintaining the off state of the first and second switches. 8. The line control device for a television receiver and a telephone set according to claim 7, further comprising means for outputting a specific signal to the other terminal. 9. A connection cable for connecting an external telephone line to another device having a telephone function via a switch provided in the television receiver having a telephone function, and the connection cable provided to the television receiver. The usage status detecting means for detecting the usage status of the telephone and the usage status of its own telephone function through the cable, and the on / off control of the switch according to the detection output of the usage status detecting means. A line control device for a television receiver and a telephone, comprising: a control means for forming a use state of the telephone and a use state thereof when the telephone is off.