JPH08163537A - Two-way broadcast system and its receiver - Google Patents

Abstract

PURPOSE: To allow only a regular subscriber to take part in a 2-way broadcast program for preventing leakage of reply content by allowing a receiver side to decode reply information and connect a communication line with a reply destination based on secret reply information and secrecy processing relation information in multiplexed information from a broadcast side. CONSTITUTION: Multiplex information from a broadcast station system 10 is received by a reception broadcast system 20 having an adaptor 2 of a regular subscriber and a TV receiver 21 or the like and the adaptor 22 decodes a telephone number obtained by ciphering a reply destination telephone number of the system 10 in the multiplex information with a laser cryptographic key 2 and information B including information A2A representing the key 2, for example, separately. A telephone set 24 of a system 20 is connected to a reply destination system 10 via a telephone station system 30 based on the decoding result and similarly reply is made by using the cryptographic information. Thus, only a regular subscriber takes part in the 2-way broadcast program without leakage of reply content.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-way broadcasting system and its receiving device suitable for a telephone voting service, for example.

[0002]

2. Description of the Related Art At present, a response request is provided to a viewer in a broadcast program such as a quiz program, TV shopping, a questionnaire survey, etc., and the response to the response request is transmitted by a telephone or a facsimile from the viewer side. There are many viewer-participation-type broadcast programs to be transmitted to.

In the case of such a viewer participation type broadcast program, information such as a telephone number of a response destination is provided by the broadcast program. For example, in the case of television broadcasting, the telephone number of the reply destination is displayed on the screen for a certain period of time by using superimpose, or provided as voice by announcing the cast of the program. Similar programs are also provided in radio broadcasting.

In this case, the viewer who wants to make a response needs to make a memo or memorize the telephone number of the response destination displayed on the screen or provided by voice.
Alternatively, if the television receiver has a so-called still function that freezes the display image, the screen on which the telephone number of the response destination is displayed is frozen, and the telephone number of the response destination is recorded while still. Or, dial directly. Using the information such as the telephone number of the response destination thus obtained, the viewer returns a response by operating the telephone or the facsimile device.

However, information such as the telephone number of the respondent is usually broadcast for only a very short time in the broadcast program. Therefore, some viewers may not be able to completely write down the telephone number of the reply destination, or may have made a mistake because they rushed to make a memo.

Further, it may happen that the telephone number of the reply destination could not be recorded because the memo paper and the writing implement could not be prepared. Also, in the case of a TV receiver with a still function, while trying to operate the still function,
There are times when the display of the telephone number of the reply destination has ended.

As described above, since the viewer's side cannot always hold the correct telephone number to reply to, the wrong telephone number may be triggered.

Particularly, when there are a plurality of responding destinations, the above problem is likely to occur. As an example in which there are a plurality of response destinations, there is a response method using a telephone voting service. This telephone voting service is, for example, in the viewer participation type program as described above, the congestion of the telephone line caused by a large number of viewers making a call to the telephone number of the response destination at the same time, and the time for the oral response. It is provided by the telephone company in order to solve the disadvantage that the burden of the line usage fee increases with the passage of time, and is called a telegon.

In this telephone voting service, for example, in a questionnaire survey or a quiz in a television or radio program, a response destination telephone number for reception is assigned to each of a plurality of answers to one question. The number of incoming calls to the response destination telephone number, that is, the number of responses from the viewer is counted and aggregated by each telephone station side of the calling side, and the result is notified to the broadcasting station side.

This telephone voting service will be described in a specific example. For example, in a TV program,
When broadcasting a questionnaire survey of a favorite baseball team, as shown on the television screen 1 in FIG. 12, a different response telephone number is set and broadcasted for each baseball team as a response option.

Each viewer 2 refers to the television screen 1 and dials the telephone number of the baseball team he / she prefers.

[0012] Then, on the telephone station 3 side, an incoming call for each answering telephone number is received at the subscriber exchange office in the area of the viewer, and a reception completion notice is sent to the answering person, and at the same time, each answering telephone number is sent. Performs a primary count of the number of incoming calls. On the telephone station 3 side, the service network control station collects data on the number of incoming calls primarily collected by the subscriber exchange stations all over the country, and further the collected data is totaled by the management station. The management station informs the call notification computer 4a of the television station 4 of the total number of incoming calls for each answering telephone number through the call number notification line 3a.

The television station 4 broadcasts a screen such as a graph of the aggregation result as shown in the television screen 5 of FIG. 12, for example, in order to reflect the aggregation result notified from the telephone station in the broadcast program.

In the telegon service, a request from a service contractor (broadcasting station 4 in this example), as shown in FIG.
In the example of 2, customer control computer 4b
In response to a request from the service provider, the call from any responder can be directly received by the service contractor (in this example, the operator 4c of the broadcasting station). This service is called cut-through, and the telephone station 3 sends a connection notice to the responder who becomes the cut-through. In this cut-through state, the responder is sent through the cut-through reception line 3c. Can directly call and exchange data with the service contractor. However, the number of lines for accepting this cut-through is limited in advance.

In the telephone voting service described above, the response from the responder is substantially completed when the call arrives at the telephone station, and the line can be disconnected to reduce the load on the telephone line. At the same time, the viewer can go on-hook immediately after receiving the incoming call, which reduces the burden of the line usage fee.

[0016] Further, since the incoming call is received at the subscriber exchange station and the total of the telephone votes is distributed for each area, congestion of the relay line can be avoided, and a relatively large number of calls are broadcast as the number of votes in a short time. You can notify the station side. Current systems have the ability to handle up to 500,000 calls in 5 minutes, for example.

[0017]

Even if a response is made using the telegon service as described above, if the telephone number to be answered is provided to the viewer by superimposing or announcement from the program host, etc. , As before, the problems mentioned above are not solved.

In order to eliminate such inconvenience, the present applicant has filed Japanese Patent Application No. 5-344233 (December 1, 1993).
7 date, reference number S93083886), information related to a broadcast program, such as a response destination telephone number of interactive broadcast, is multiplexed with the broadcast signal and provided to the receiving side, while the receiving side receives the received broadcast signal. Information related to interactive programs is extracted, decoded, stored in memory temporarily, and when responding, the response to the interactive program is sent by automatically dialing using the response destination telephone number stored in memory. We have already proposed a multiplex broadcasting method and a receiving apparatus thereof that can be surely performed and does not require the viewer to write down or memorize a telephone number of a response destination.

In the proposed method, program related information is constructed by a DTMF (Dual Tone Multi Frequency) signal used for telephone communication, and is multiplexed with a main audio signal for broadcasting. In the proposed receiver, the DTMF signal is separated / decoded from the received broadcast audio signal, the program-related information is reproduced, stored in the memory, and used when responding to the interactive program.

Next, the DTMF signal will be described with reference to FIG. The DTMF signaling system is an audio band signaling system in which two tones of a low frequency group (low group) and another high frequency group (high group) are simultaneously sent. Each of these low and high frequency groups consists of tones of four audio band frequencies, no two of which are in articulatory relation.

In the DTMF signal, the four frequencies in the low group are, for example, 697 Hz, 770 Hz, 852 Hz and 941H.
z, and the four frequencies of the high group are, for example, 1209 Hz,
It is set to 1336 Hz, 1477 Hz, and 1633 Hz. Then, each of the low group and the high group is combined with one frequency, and each DTMF composed of the combination is combined.
Signals (each of these DTMF signals are hereinafter referred to as function signals) are assigned to push buttons "0" to "D" arranged in 4 rows and 4 columns, as shown in FIG.

In the telephone communication, only 12 of the 16 functional signals of the DTMF signal are generally used for the subscriber address (telephone number) signal. That is,
"0" used as a so-called numeric keypad on the telephone
The function signals of the above 12 combinations correspond to the numbers "9" and the symbols "*" and "#". FIG.
The function signals corresponding to the letters "A", "B", "C", and "D" indicated by broken lines in 3 are not generally used in Japan, but the push button (PB) dial is used. It is only used for data transmission.

When a line is selected by a telephone number using such a DTMF signal, the signal transmission condition is as shown in FIG.
It is regulated as shown in 4.

Due to the combination of the two frequencies and the transmission conditions as described above, the DTMF signal rarely occurs in the natural world and can be clearly distinguished from natural sounds such as human voice. It is possible to multiplex (mix) the broadcast audio signal and broadcast it, and separation on the receiving side is relatively easy.

By the way, the DTMF signal is also used in a multi-function telephone, and by pressing a button on a push-button telephone from outside, the message recorded on the telephone at home can be played back or the answering machine can be recorded. You can record, play back, and delete the message.

However, in the above-mentioned telephone voting service (telegon service), for example, [0180]
−0 ×××××], the telephone number can be easily decoded by using a commercially available DTMF decoder even with the above-mentioned DTMF signal. Therefore, even a person who does not have an authorized two-way broadcast decoder can call the same response destination number, and the line of that number may become congested.

If the response information from the viewer is transmitted as it is, there is a possibility that the response content of the viewer may be known to a third party due to wiretapping or the like.

In view of the above point, an object of the present invention is to allow only authorized subscribers to respond to interactive programs, and to respond the response contents of individual viewers of interactive programs. It is an object of the present invention to provide a two-way broadcasting system and a receiving device for the two-way broadcasting system that can be leaked only to a person and a response destination.

[0029]

In order to solve the above-mentioned problems, in the bidirectional broadcasting system according to the first aspect of the present invention, a broadcasting side multiplexes predetermined response destination information for a question in a program into a broadcasting signal. Is a two-way broadcasting system in which the receiving side connects the communication line with the response destination based on the response destination information extracted from the received multiplexed signal and sends the response information to the question. , On the broadcast side,
The response destination information is secret-processed by a predetermined processing method, and is multiplexed with the predetermined processing-related information for specifying the secret-processing and broadcasted in the broadcast signal. At the receiving side, it is secret from the received multiplexed signal. The response destination information that has been encrypted and the processing-related information are extracted, and based on this processing-related information, the secretly-processed response destination information is restored, and the communication line with the response destination is connected. It is characterized by.

Also, in the two-way broadcasting system according to the second aspect of the present invention, the broadcast side multiplexes predetermined response destination information for the question in the program into the broadcast signal and broadcasts it, while the receiving side receives it. A two-way broadcasting system in which a communication line with the response destination is connected based on the response destination information extracted from the multiplexed signal, and the response information to the question is transmitted.
On the receiving side, the response information is subjected to a secret processing by a predetermined processing method, and it is sent out through a communication line together with predetermined processing related information for specifying the secret processing. On the broadcasting side, the response information subjected to the secret processing is sent. It is characterized in that restoration processing is performed based on predetermined processing related information.

[0031]

According to the first or second invention having such a structure,
When the secret processing of the response destination information at the broadcasting station side is encryption, it shows the encryption key, and when it is information compression, it shows the compression method. Since only the subscriber can see it, and not the third party, only the authorized subscriber of the two-way broadcast can restore the secretly processed response destination information, and Confidentiality is maintained.

According to the second aspect of the invention, the meaning of the processing-related information of the confidential processing of the response information on the receiving side is understood only by the broadcasting station side and not by a third party. The confidentiality of the response information of the authorized subscriber of the two-way broadcast to the subscriber is maintained.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bidirectional broadcasting system and a receiving apparatus thereof according to the present invention will be described below.

This example is an example of a two-way broadcasting system in the case of television broadcasting, and the telegon service as an example of the above-mentioned telephone voting service is used for the response to the two-way program.

In this example, the program-related information is DT.
As a signal structure in the MF signal format, the main broadcast audio signal is multiplexed (mixed) and broadcast. On the other hand, on the receiving side, the DTMF signal is separated / decoded from the received broadcast sound, the program-related information is reproduced, stored in the memory, and used when responding to the interactive program.

[Outline of Interactive Broadcasting System] FIG. 4 shows an outline of the interactive broadcasting system of this embodiment. The interactive broadcasting system of this example is the system 10 of the broadcasting station.
And a receiver system 20 and a telephone station system 30.

In the system 10 of the broadcasting station, 11 is a studio of the broadcasting station, and the interactive program created here is transmitted from the broadcasting antenna 12 to the receiving device system 20 by the ground wave or via the artificial satellite 13. To be done.
For example, in the case of interactive programs such as quiz programs and questionnaire surveys, questions and a plurality of options for each question are broadcast on the screen of the television receiver or by an announcement by the moderator of the program. Questions are usually
One or more will be broadcast. At this time, the interactive program related information has a format of DTMF, which will be described later.
It is multiplexed with the broadcast audio signal in the form of a signal.

The receiving device system 20 includes an existing television receiver 21, an adapter device main body 22 for receiving and responding to interactive program information, a remote commander 23 using infrared rays, and an external telephone 24.

The adapter device main body 22 has a receiving portion and a decoding portion for the infrared remote control signal of the remote commander 23. As shown in FIG. 5, the adapter device body 22 has a recess 22R for accommodating the remote commander 23.
When the remote commander 23 is housed in the recess 22R, the infrared light emitting portion 23SD of the remote commander 23 is
The adapter device main body 22 is arranged so as to face the infrared light receiving portion 22PD.

As described above, when the remote commander 23 is housed in the adapter device main body 22 and the various buttons 23a, 23b, 23K of the remote commander 23 are operated, a remote control signal corresponding to the operation is emitted from the light emitting unit. Two
Adapter device main body 22 via 3SD and light receiving unit 22PD
Since it is sent to and decoded by the device, it is used as if it operates as an adapter for receiving and responding to one piece of interactive program information.

As will be described later in detail, the adapter device main body 22 is an NCU as an interface with a telephone line.
(Network control unit)
As shown in FIG. 4, a telephone line 31 and an external telephone 24 are connected to the adapter device main body 22. In this example, the external telephone 24 can access the telephone line 31 via the adapter device main body 22 and can perform a normal telephone function.

As will be described later, the adapter device main body 22 and the remote commander 23 also have a so-called hands-free telephone function. That is, as shown in FIG. 5, the remote commander 23 is provided with an on-hook button 23a, an off-hook button 23b, and a so-called ten-key (numeric etc.) button 23K. On the other hand, the adapter device body 22 is provided with a microphone 22MC and a speaker 22SP.

When making a call as a hands-free telephone, the off-hook button 23b is pressed and then the telephone number is dialed by the ten-key button 23K. Further, it is only necessary to press the off-hook button 23b for an incoming call from the other party. When talking to the other party, the transmitted voice from this is the microphone 22M.
The voice received from the other party is sent through the speaker 22
Try to listen from the SP. Then, when the talk with the other party is finished, the line can be opened by pressing the on-hook button 23a.

The adapter device main body 22 also functions as a reception / decoder for interactive program information that is multiplexed and broadcast as a DTMF signal, and also as an interactive program response device in cooperation with the remote commander 23.

That is, in this example, the interactive program information is mixed as the DTMF sound with the broadcast program sound and is emitted from the speaker 21SP of the television receiver 21, so that the adapter device main body 22 is shown in FIGS. 6, the sound emitted from the speaker 21SP of the television receiver 21 is picked up by the microphone 22MC. As will be described later, the adapter device body 22 has a function of extracting only DTMF sound from the collected sound and decoding the interactive program information.

Further, since the adapter device main body 22 uses the information necessary for response in the decoded interactive program information, in this example, the telephone voting service, at least the response destination telephone number (telegon It also has a function of storing a service telephone number) in a memory built in the adapter device main body 22.

The response operation to the question in this example is
It is an option number selected by the user (responder) from a plurality of options preset and broadcasted for the question, which is input by operating the ten-key button 23K of the remote commander 23. In the case of this example, with the remote commander 23 stored in the adapter device main body 22 or in the state where both are separated as shown in FIG. When the option number is selected as a response to the response, the adapter device main body 22 receives the remote control signal and stores the question number as the target of the response operation and the selected option number in the response history memory. , The telephone number associated with the selected option number is read from the memory, and the telephone number is automatically dialed.

As shown in FIG. 4, the subscriber exchange 32 of the telephone station accepts this incoming call and counts the number of incoming calls for each incoming call to the same telephone number. And each subscriber exchange 3
2 informs the telegon system 33 of the number of incoming calls to each telephone number counted by the exchange. The telegon system 33 is shown as one that performs the data collection and totalization function of the service network control station and management station described above.

In the telegon system 33, the total number of incoming calls for each option selected is notified to the computer in the studio of the broadcasting station through the telephone line 31 as the number of responders who have selected the option. Broadcasting station
The result of this aggregation is broadcast to users in an interactive broadcast program.

Then, the system 10 of the broadcasting station multiplexes the evaluation data for the question into the broadcast sound in the form of the DTMF signal and broadcasts it. Upon receiving this evaluation data, the adapter device main body 22 compares the question number and the selected option number stored in the response history memory with the evaluation data, as will be described later, and makes a selection for evaluation on the broadcast side. Whether it was, if it is a quiz program,
Evaluate whether or not the correct answer is returned.

Subsequently, the system 10 of the broadcasting station multiplexes the selection data for the evaluation result with the broadcasting sound in the form of the DTMF signal and broadcasts it. The adapter device body 22 evaluates the evaluation result based on this selection data. For example,
When the selection data requires that the number of correct answers for a question is a predetermined number or more, the selection is performed depending on whether or not the condition is met. In the case of omission in the selection, the adapter device main body 22 limits the response so as to prohibit the response to the question broadcast thereafter, for example. Therefore, even if the user of the adapter device main body 22 in the response limited state responds to a question broadcast thereafter, it is not called.

In this way, the originator of the response self-limits the origination of the response. Therefore, even in a system that responds to an interactive program using a telephone voting service such as telegon, a so-called win-win quiz program or a premium type program is used. It becomes possible to provide the two-way broadcasting program of.

[Broadcasting of interactive program from broadcasting station] As described above, in this example, the television broadcasting station broadcasts the question and the choices of the response to the question.
The contents of the question and the contents of a plurality of options for the question are notified to the viewer (responder) by the screen of the television receiver or the announcement of the program host. At the same time, the numbers [0] to [9] are multiplexed on the broadcast signal,
The interactive program related information in which the combination of the symbols “#” and “*” and the characters “A”, “B”, “C”, and “D” is expressed by the DTMF signal is broadcast.

[Example of encryption of response destination telephone number] In this embodiment, the response destination telephone number corresponding to the response option in the interactive broadcast program is encrypted and broadcast in the following manner. .

FIG. 1 is for explaining an example of encryption of a response destination telephone number, and FIG. 1A is an example of a response destination telephone number portion for one of the choices of question data. Further, FIG. 1B shows the answering telephone number of FIG. 1A encrypted by the Caesar encryption method using [2] as a key (adding [2] to each digit).

In the example of FIG. 1, the telephone number of the telegon service, for example, "0180-01-1111", whose upper four digits are [0180], is, for example, [2] as a key, as indicated by the downward arrow. When encrypted, the encrypted telephone number becomes, for example, "2302 * 23 * 3333". Here, the symbol "*" is used as a separator.

In this example, the characters of the DTMF signal, for example, "A" and "A", sandwich the encryption key of the Caesar encryption, and the characters "B" and "B" make the encrypted telephone number. And the symbols "#" and "#" of the DTMF signal.
Then, insert the encryption key and the encrypted telephone number from the front and back,
For example, "# A2A * B2302 * 23 * 3333B
A single pack such as "#" is broadcast in such a manner that it can be distinguished from information related to the questions of the interactive broadcast program.

Further, as shown in FIG. 1C, for example, "A
2A "and" B2302 * 23 * 3333B ", the encryption key part and the encrypted telephone number part are sandwiched by the symbols"#"and"#", respectively, to form a separate pack, and the first part of the interactive program is displayed. Alternatively, only the pack of encryption keys may be broadcast, and the pack of encrypted telephone numbers may be broadcast at the time of questioning the same program.

[Receiving Device System] FIG. 7 shows a specific example of the configuration of the adapter device main body 22 and the remote commander 23 of the receiving device system 20 shown in FIG. As described above, in this example, the adapter device main body 22 has a function of sending a response to the interactive program through the telephone line (in this example, making a call to the telephone number corresponding to the option for the question), and receiving the television image. Speaker 2 of machine 21
It has a function of collecting sound from 1SP, extracting only DTMF sound in the sound, decoding bidirectional program related information, and a function of receiving an infrared remote control signal from the remote commander 23.

The adapter device body 22 of this example is
Since it is necessary to have a function to send a response to an interactive program via a telephone line, it is possible to make a call without holding the handset by making more positive use of this so-called hands. It has a function as a free phone. First, NC for this telephone function
The U (network control unit) system will be described.

Reference numeral 201 is a modular jack on the telephone line side, and 202 is a modular jack on the external telephone side. An off-hook detection circuit 203 of the external telephone is connected between the modular jacks 201 and 202. The off-hook detection circuit 203 of the external telephone detects the off-hook when the external telephone connected to the modular jack 202 is off-hook, and the detection output is detected by a microcomputer (hereinafter referred to as a microcomputer) 300.
To notify.

Modular jack 201 on the telephone line side
In addition, the surge protection circuit 204 and the ring detection circuit 20
5, polarity reversal detection circuit 206, dial switch 20
7. Connected to the transformer 209 via the hook switch 208. Here, the line side and the microcomputer 300 side are insulated.

When the ring detection circuit 205 detects a ringing signal in which a voltage of 16 Hz and 75 V is intermittent when an incoming call is received through a telephone line, the detection output is detected by the microcomputer 300.
To notify.

When the polarity reversal detection circuit 206 detects that the polarity of the telephone line has been reversed, it notifies the detection output to the microcomputer 300. Accordingly, the microcomputer 300 recognizes that the line is connected, that is, the incoming call is made to the outgoing call.

The dial switch 207 dials according to the line type and dial data sent from the microcomputer 300 through the dialer 210 at the time of calling. The line type is set by the user with respect to a line type setting DIP switch (not shown). If the setting is a dial line, the microcomputer 300 controls the dial switch 207 via the dialer 210,
Dial with a pulse of 10pps / 20pps, P
If it is B line (push line), dialer 21
The PB signal (DTMF signal) is used to dial the sending amplifier 211 via 0.

The dial data is stored in the adapter device main body 22.
When the remote commander 23 is used as a hands-free telephone, the microcomputer receives a key operation for inputting a telephone number by the user, and the microcomputer 300 sends it out. Further, when the adapter device main body 22 and the remote commander 23 are used as response operation devices for interactive programs, the response destination telephone number stored in the memory of the microcomputer 300 (options sent from the broadcasting station as interactive program information) Each telephone number) is read out, sent out from the microcomputer 300, and automatically dialed.

The hook switch 208 is the microcomputer 300.
The control from switches between the on-hook (line open) state and the off-hook (DC loop closed) state. In the case of this example, the hook switch 208 is switched according to the operation of the on-hook button 23b and the off-hook button 23a of the remote commander 23.

The speakerphone 212 is a communication line circuit for performing 2-line to 4-line conversion, and supplies the other party's voice (received voice) sent from the telephone line through the transformer 209 to the speaker 22SP via the speaker amplifier 213. , The microphone amplifier 2 picks up the sound with the microphone 22MC.
The voice (transmitted voice) through 14 is transmitted to the telephone line through the transformer 209.

The voice received from the transformer 209 is
It is supplied to the tone detection circuit 215. The tone detection circuit 215 detects various call progress tones such as a busy tone, a ring back tone, and a dial tone, and notifies the microcomputer 300 of them.

Reference numeral 217 denotes a DTMF receiver, which extracts a DTMF signal from the input voice and outputs it as a numerical value or "#", "*", "A", "B", "C", "D", etc. Decode to symbol information. This DTMF receiver 2
One of the voice received through the transformer 209 and the voice that is picked up by the microphone 22MC and passed through the amplifier 214 is switched and selected by the analog switch circuit 216 and input to the line 17. The switch circuit 216 is
By the switching signal from the microcomputer 300, it is switched so that the voice signal from the amplifier 214 is selected during a non-call and the reception voice signal from the transformer 209 is selected during a call.

DTM from this DTMF receiver 217
The decode signal of the F signal is supplied to the microcomputer 300. The microcomputer 300 extracts the question data, the evaluation data, the selection data, the (selection + ID request) data, and the like as described above from the decoded signal of the DTMF signal, and performs the corresponding processing.

The microcomputer 300 has a so-called one-chip microcomputer structure, and has a built-in CPU, a ROM storing programs and fixed data, and a nonvolatile RAM and a volatile RAM. In the case of this example, the ID memory 218 is connected to the outside of the microcomputer 300. The ID memory 218 is composed of an electrically erasable and writable ROM, and at the time of factory shipment, identification information unique to each receiving device (identification information is referred to as I
(Referred to as “D”) is set, and the user ID is registered by the user's input setting. As the user ID, for example, the telephone number of the user is registered.

The display element 22LD is a D element required for turning on / off the power of the adapter device main body 22 and for responding.
During reception and decoding of the TMF signal, it is for displaying the cut-through state of the telegon and the telephone number of the response destination, and the microcomputer 300 controls lighting, turning off, and blinking.

The remote control light receiving section 22PD receives the infrared remote control signal from the remote commander 23 and notifies the microcomputer 300 of the remote control signal. Microcomputer 30
Reference numeral 0 is a built-in demodulator that decodes this remote control signal.

The remote commander 23 is provided with a one-chip microcomputer 231, a button group 232 including buttons 23K for numbers and the like, an on-hook button 23a, an off-hook button 23b, and the like, and a transmitting section 233 having a light emitting section. The microcomputer 231 scans the button group 232 at regular intervals to detect button press. Then, the microcomputer 231
When the button press is detected, sends a remote control signal corresponding to the pressed button to the transmitter 233. Transmission unit 23
The light emitting unit 3 transmits the remote control signal as infrared rays to the light receiving unit 22PD.

Reference numeral 219 indicates that the response is restricted or the user performs a response operation outside the time limit.
It is an alarm buzzer used for informing that it is an inappropriate response operation, and is controlled by the microcomputer 300.

[Use of the adapter device as a hands-free telephone] When the user uses the adapter device as a hands-free telephone to make a call, the user presses the off-hook button 23b of the remote commander 23 and then pushes the number button 23K. Use to dial the destination telephone number. Then, the microcomputer 2 of the remote commander 23
31 detects this and, for example, the off-hook button 23
The LED embedded in b is turned on to display the off-hook state, and the information of pressing the off-hook button 23b is transmitted via the transmitter 233 to the microcomputer 3 of the adapter device main body 22.
00, and then the telephone number information.

The microcomputer 300 displays the telephone number on the display element 2
It is displayed on 2LD and controls the NCU system described above.
Dial the other party. Then, after waiting for the response of the other party, the DC loop is closed and the call is ready. In this call-enabled state, the user sends the transmitted voice from the microphone 22MC and the received voice from the other party to the speaker 2
Listen from 2SP.

When the call ends, the on-hook button 23a is pressed. Then, the microcomputer 231 turns off the LED of the off-hook button 23b and, for example,
The LFD embedded in the on-hook button 23a is lit only while the button 23a is being pressed. Then, the remote commander 23 uses the on-hook button 23a.
Information of the pressing of the
To notify. Upon receiving this, the microcomputer 300 sets the line open state.

When the incoming call from the other party is received by the adapter device as a hands-free telephone, the user presses the off-hook button 23b. When the adapter device body 22 receives the remote control signal of the off-hook button 23b from the remote commander 23, the adapter device body 22 closes the DC loop and makes the call possible. After that, it is almost the same as when making a call. As described above, the adapter device can be used as a hands-free telephone.

[Reception and Decryption of Encrypted Response Destination Information] Next,
The receiving process and the decrypting process of the encrypted response destination information on the receiving side will be described with reference to FIGS. 2 and 3.

In order to receive the encrypted response destination information as shown in FIG. 1B, the symbols "#" and "A" of the DTMF signal are received.
It is necessary to identify the encryption key and the encrypted telephone number based on a letter such as "B".

In this embodiment, first, at step 151 of the reception processing routine 150 shown in FIG. 2, the microcomputer 300 mounted on the adapter device main body 22 causes the DT
The output of the DTMF decoder built in the MF receiver 217 (see the figure) is searched at all times or at a predetermined cycle, and the DTMF is output to the audio signal of the broadcast program currently being received.
When it is detected that the signals are mixed (step 152), the decoded output of the DTMF signal is taken in as the number or symbol as described above (step 15).
3).

At this time, the transmission condition as described above, that is, whether the length of the DTMF signal continuing is 50 msec or more, or D
Whether the detected signal is really a DTMF signal, depending on whether the pause time from the disappearance of the TMF signal to the rise of the next signal is 30 msec or more, or whether the sum of the length of the DTMF signal and the pause time is 120 msec or more, which is a specified value. It is checked (step 154).

As a result, it is possible to prevent the error data from being received when the reception condition of the broadcast radio wave is bad, and to prevent the erroneous reception when the normal voice accidentally contains the same frequency component as the DTMF signal. be able to.

In the next step 155, the immediately preceding code is the symbol "#", one of the letters "A" to "D", or the number "0" to "9" or the symbol. It is checked whether it is "*".

If the immediately preceding code is the symbol "#",
Proceeding to step 156, the current code is the letter "A"-
It is checked whether or not it is either "D". If any of the characters "A" to "D", step 15
7, the data of the character is DTMF receiver 21
The storage pointer address is set at the same time as the start address of the temporary storage area set in the internal memory (not shown) of FIG.

Then, in the next step 158, the flag indicating that decoding is in progress is turned on, and then the process returns to step 151 to repeat the above-described processing.

In step 155, if the immediately preceding code is any of the characters "A" to "D", the flow proceeds to step 161, and it is judged whether the current code is "#" or not. If not #, the process proceeds to step 162.

In step 155, if the immediately preceding code is any of the numbers "0" to "9" or the symbol "*", or in step 156, the current code is the characters "A" to "D". ", Which is the number" 0 "
If any of the symbols ~ to "9" or the symbol "*", the process proceeds to step 162.

In this step 162, it is judged whether or not the decoding flag is on. If the flag is on, the process proceeds to step 163 and the current code is stored in the pointer position of the temporary storage area. . Then, in the next step 164, after the pointer is updated, step 15
The process returns to 1 and the above-described processing is repeated. If the flag is not turned on in step 162, the process immediately returns to step 151 and the above-described processing is repeated.

If the current code is "#" in step 161, the process proceeds to step 165 and all the contents of the temporary storage area are saved, and then the decoding flag is turned off. (Step 166).

As a result, on the receiving side, the above-mentioned pack-type encrypted information is extracted from the received data using the symbols "#" and "#" of the DTMF signal as indexes.

Then, in step 171 of the decryption processing routine 170 as shown in FIG. 3, the encryption key and the encrypted response destination are sandwiched between the characters "A" and "A";"B" and "B", respectively. Information is separated. Next Step 172
Then, the encrypted response destination information is decrypted by the separated encryption key, the response destination information is stored in the memory (step 173), and is used in response to the interactive program as described above.

For example, "2302 * 23 *" in FIG.
Contrary to the case of encryption, an encrypted telephone number such as "3333" is decrypted using [2] as a key, as indicated by an upward arrow in FIG.
It is possible to reproduce the telephone number of the original telegon service such as 1111 ”.

In other words, for example, unless the encryption key of the Caesar cipher sandwiched between the characters "A" and "A" of the DTMF signal is unknown, it will be sandwiched between "B" and "B" sent thereafter. The encrypted access information cannot be decrypted by the Caesar encryption method and used for the response of the interactive broadcast program. Therefore, a person who does not have an authorized two-way broadcast decoder cannot call the predetermined response number,
The confidentiality of the response information to the third party is maintained, and there is no risk that the line of that number will be in a congested state.

In the above embodiment, for example, "A2
Although the encryption key [2] is sandwiched by the same letter “A” as in “A”, for example, different numbers [n (= 0 to 0
9)] is used as a key, and a plurality of decryption tables are preliminarily installed in the memory of the receiving side, and the broadcasting station side uses, as key information, an appropriate number [C] and [C], for example i]
It is also possible to broadcast while sandwiching between the numbers and select the decryption table corresponding to this number [i] on the receiving side.

As described above, as shown in FIG. 1C, only the encryption key portion is broadcast at the beginning of the interactive program, and the encrypted telephone number portion is broadcast at the question of the same program. By doing so, the broadcast station side can narrow down the responders so that only the person who is watching this interactive program from the beginning can respond.

[Example of Encryption of Response Data] In the above example, since the telephone number of the response destination is only encrypted, the response information from the individual viewers is transmitted as it is and eavesdropped. Due to such reasons, the content of the response is known to a third party. Therefore, in this embodiment, the response data from the receiving side is also encrypted and sent to the broadcasting station side.

For encryption of response data on the receiving side, a plurality of encryption tables, which are the reverse of the above-mentioned decryption table, are installed in the memory on the receiving side in advance. A specific encryption table is used that corresponds to the same key information that was used to decrypt the reply-to information.

Then, the encrypted response data and the key information are packed by the function signals corresponding to the characters and symbols of the DTMF signal in the same manner as the response destination information as described above, and for example, “# CnA * Cyyy”. * ZzzB # ”
It is sent to the broadcasting station side in the format of (y, z = 1 to 9).

In this example, the characters of the DTMF signal, for example, “C” and “A”, sandwich the encryption key of Caesar encryption, and the characters “C” and “B”, the encrypted response data “yy”.
yy-zzzz ”and the encryption key and the encrypted response data are sandwiched by the symbols“ # ”and“ # ”of the DTMF signal from before and after, thereby encrypting the response destination information in the above-described embodiment. Since the packs have the same format, the broadcast station side can decrypt the encrypted response data from the receiving side by the decrypting means similar to that of the receiver as described above.

The broadcast station may specify the encryption method of the response data, or the response data may include a code specifying the encryption method.

In this example as well, as in the above-described embodiment, unless the encryption key sandwiched between "C" and "A" is known, it is sandwiched between "C" and "B" to be sent thereafter. The encrypted encrypted response data cannot be decrypted. Therefore, even if the response data is wiretapped, the response content from the viewer will not be leaked to a third party.

As described above, in the telegon service, since the answering telephone number itself is the answer to the question, the response data is encrypted in the cut-through state directly between the responder and the broadcasting station. It becomes possible when exchanging various data. Further, since the number of lines for accepting cut-through is limited, it is necessary to narrow down the responders by repeating a plurality of questions.

The example of using the Caesar encryption system has been described above for the encryption of the access information and the response data of the interactive broadcast program, but it goes without saying that another encryption system can be used.

If a plurality of encryption methods can be selected, the encryption method may be designated from the broadcasting station side. Also,
In response data encryption, the response data may include a code designating an encryption method.

[Other Embodiments] In the above example, by encrypting the access information and the response data of the interactive broadcast program, the contents of each can be kept secret from a third party. The third party cannot restore the original information even by compressing the access information and the information of the response data according to a certain rule, so that each content can be kept secret.

In this embodiment, the information amount is compressed by utilizing the characteristic of the answering telephone number. That is, if the answering telephone number is the telephone number of the telegon service, the number portion fixed in advance is not sent as the multiple information. The remaining number part is compressed using its regularity. When there are a plurality of answering telephone numbers, one telephone number sends all the digits, but the other telephone number information sends only the difference from the telephone number sending all the digits.

[First Example of Information Compression of Response Telephone Number]
FIG. 8 is for explaining the first example of the method of compressing the information of the answering telephone number. In this example, the information is compressed by utilizing the relation of a plurality of telephone numbers.

FIG. 8A is an example of a part of a plurality of option data in one question data, and FIG. 8B shows
FIG. 8B shows an example of a response telephone number associated with each option number of the plurality of options in FIG. 8A.
In the example of FIG. 8, 4 of consecutive numbers [01] to [04] are used.
As shown in FIG. 8B, consecutive ascending telephone numbers are assigned as response destination telephone numbers for each of the option numbers.

In the example of FIG. 8, all 10-digit telephone numbers TNO are broadcast as the answering telephone numbers of the option data of the first option number broadcast as the question data. Then, the information of the response destination telephone number of the option data of the subsequent option number is the difference Δa from the response destination telephone number of the option data immediately before that (here, this difference Δa is the difference of the last option data of the receiving side). The value to be added to the answering telephone number is assumed to be broadcast.

That is, for the option with the option number [01], [0180000001] is broadcast as the response destination telephone number forming the option data. Since the response destination telephone number for the option of the next option number [02] is [0180000002], the response destination telephone number information of the option data for this option is:
[1], which is the difference Δa from the answering telephone number of the option number [01] immediately before that, is broadcast.

Similarly, for the option number [03], the difference Δa [1] from the immediately preceding answer number [02] of the option number [02] is [1] and the option number [04].
[1], which is the difference Δa from the answer destination telephone number of the immediately preceding option number [03], is broadcast as the information of the answer destination telephone number forming the option data.

On the receiving side, the answering telephone number TNO of the first option is directly extracted from the option data,
For the next option data, the difference telephone number TNO of the first option is added with the difference .DELTA.a which is multiple broadcasted as the information of the response destination telephone number to obtain the response destination telephone number of the option. . Then, with respect to the subsequent option data, the difference Δa which is multiplex-broadcast as the response telephone number information of the relevant option data is added to the response destination telephone number of the immediately preceding determined option, and the response destination telephone number of the relevant option is added. Is required.

In the case of this example, since there is a difference from the answering telephone number of the immediately preceding option number, the difference is relatively small, and in many cases a single digit number is sufficient for the multiplexed transmission information. The information compression rate is large.

In particular, when a plurality of response destination telephone numbers are consecutive numbers in ascending order, the information of the response destination telephone numbers of the option data other than the first option data of the question data is all "1". Therefore, in this way, the difference Δ between the response destination telephone number of the immediately preceding option and the response destination telephone number of the next option Δ
When all the a are numerical values and the option numbers are also assigned in ascending order, for example, as shown in the example of FIG. 8C, for example, the second option number and the last option number are connected by the symbol “#”. By doing so, it is possible to further compress the information by indicating that the option numbers are consecutive from the second to the last option number, and then the information of the common difference Δa is multiplexed and broadcast. is there.

In the above example, the answer destination telephone number of the option data at the beginning of the question data is designed to be multi-broadcast with all 10 digits, but the position in the question data of the option data with all 10 digits being multi-broadcast. May be the intermediate position option data or the last option data.

In this case, when the 10-digit response destination telephone numbers are multiplex-broadcast with respect to the intermediate position option data, the response destination telephone numbers are assigned in ascending order (not necessarily continuous) as described above. , The information of the response destination telephone number of the option data before the option data of the intermediate position is the difference value subtracted from the telephone number of the option immediately after that at the receiving side, and the option data of the intermediate position is set. The information of the response destination telephone number of the option data after that is a value to be added to the telephone number of the option immediately before it, like the difference Δa.

For the last option data, 10
In the case of multiplex broadcasting of the response destination telephone numbers of all digits, if the response destination telephone numbers are assigned in ascending order (not necessarily continuous) as described above, the receiving side selects the option immediately after that. The difference value subtracted from the phone number.
In addition, when the answer destination telephone numbers of all 10 digits are multiplex-broadcasted about the last option data, if the answer destination telephone numbers are assigned in descending order (not necessarily continuous), the receiving side The difference value to be added to the telephone number of the option immediately after that.

When the difference value becomes a negative value, if the sign "A" is added to the information of the telephone number of the answering destination to indicate that it is a negative value, as described above. Consider ascending or descending order of different phone numbers, or 10
The process of considering the position in the question data of the option to multiplex the answering telephone numbers of all digits becomes unnecessary.

The response destination telephone number compressed as described above is the same as the encrypted response destination telephone number as described above.
Characters of the TMF signal, for example, “A” and “C”, sandwich an appropriate number [j (= 0 to 9)] indicating the type of compression method,
The letters "B" and "C" sandwich the compressed telephone number, and the symbols "#" and "#" of the DTMF signal sandwich the compression method information and the compressed telephone number from the front and back, One pack is broadcast in such a manner that it can be discriminated from the related information of the question of the interactive broadcast program and the like.

Further, as described above, the compression information portion and the compressed telephone number portion are sandwiched between the symbols "#" and "#", respectively, to form a separate pack, and the first part of the interactive program is displayed. It is also possible to broadcast only the pack of information on the compression method and broadcast the pack of the compressed telephone number at the time of questioning the same program.

[Reception and Decompression of Compressed Response Destination Information] Next, the reception processing and restoration processing of the compressed response destination information on the receiving side will be described with reference to FIG.

In this embodiment, in the subroutine 150 of the restoration processing routine 180 as shown in FIG. 9, D is processed in the same manner as the reception processing of the encrypted response destination information as described above.
The compressed response destination information in the pack format as described above is extracted from the received data using the symbols "#" and "#" of the TMF signal as indexes.

Then, in step 181, the compression method information and the compression response destination information sandwiched between the characters "A" and "C";"B" and "C" are separated. In the next step 182, based on the information of the separated compression method, a simple operation of adding or subtracting the difference information to the response destination telephone number to which all 10 digits have been sent is performed. The answering telephone number of each option is restored. These answering telephone numbers are stored in the memory (step 183) and are used when responding to the interactive program as described above.

Similarly to the above, in this embodiment, for example,
Unless the meaning of the information of the compression method sandwiched between the characters "A" and "C" of the DTMF signal is understood, the compression response destination information sandwiched between "B" and "C" sent thereafter is restored. Then, since it cannot be used for the response of the interactive broadcast program, the confidentiality of the response destination information to the third party is maintained.

[Second example of information compression of response destination telephone number]
FIG. 10 is for explaining the second example of the method of compressing the information of the response destination telephone number. In this example as well, as in the first example described above, the relevance of a plurality of telephone numbers is used. By doing so, the information is compressed.

FIG. 10A shows a part of a plurality of option data in one question data, and FIG. 10B shows four consecutive numbers [01] to [04] of this example. It is an example of a response destination telephone number of the option data for the option.

Also in the example of FIG. 10, all 10-digit telephone numbers TNO are broadcast as the response destination telephone numbers of the option data of the first option number broadcast as the question data. Then, the information of the response destination telephone number of the option data of the subsequent option number is the difference Δb from the response destination telephone number TNO of the first option data (this difference Δb is the response destination telephone of the first option data on the receiving side). It is a value to be added to the number).

On the receiving side, as shown in FIG. 10B, by simply adding the difference Δb between the respective option data to the response destination telephone number TNO of the first option data, the response destination corresponding to the option number of the option data concerned. You can play the phone number.

Also in this example, the position in the question data of the option data for multiplex-broadcasting all 10-digit response destination telephone numbers is the same as in the first example described above, and the position in the question data is the option data at the beginning of the question data. It may be the option data at the intermediate position or the last option data.

Further, when the difference value becomes a negative value, the symbol "A" is added to the information of the answering telephone number to indicate the negative value. As in the first example, it is not necessary to consider the ascending order, the descending order, or the like, and the processing considering the position in the question data of the option to multiplex all 10-digit response destination telephone numbers.

Even when this second example is used for compressing the telephone number information, as in the case of the first example, the receiving side has a difference from the response destination telephone number to which all 10 digits are sent. It is possible to easily reproduce the answering telephone number of each option by a simple operation of adding or subtracting the information of.

[Third example of information compression of response destination telephone number]
As a third example of compressing the telephone number information, as described above, the telephone number of the telegon service has the upper four digits of [0
180], and when using this service in the broadcast media, the fact that the next digit is also set to [0] is used.

That is, in the case of this third example, FIG.
As shown in 1A, the fixed upper 5 digit telephone number is not transmitted as multiplexed data at all. And this third
In the case of the example, since the number of question data is 100 or less, the last two digits are changed as the telephone number. Also,
The middle three digits of the telephone number are the same number and are represented by a single digit.

That is, for example, in the case of the telephone number [0180000001] as in the example shown in FIG. 11B, the middle three-digit number [000] is represented by one [0], and the last two digits are the last two digits. , Transmit as is. Therefore, the information of the telephone number to be multiplexed and transmitted is as shown in FIG. 11C.
It becomes [001].

Similarly, in the case of the telephone number [0180011101] as in the example shown in FIG. 11D, the middle three-digit number [111] is represented by one [1], and the last two lower digits. Will be transmitted as is. Therefore, the information of the telephone number to be multiplexed and transmitted is as shown in FIG. 11E.
It can be represented by [101]. Also, for example, the telephone number [0180022203] is the middle three-digit number [22
2] is represented by [2], the telephone number information is [20
3].

FIG. 11F shows an example of a plurality of option data in the case of the third example.

In the case of this third example, the receiving apparatus
The answering telephone number of each option is reproduced as follows. First, the five-digit number [01800] is set.
Next, following this 5-digit number, the first digit of the 3-digit information multiplexed and transmitted as the telephone number information is continued by 3 digits. After that, the last two digits of the three-digit information that has been multiplexed and transmitted as the telephone number information are continued.

In the case of the third example, it is not necessary to send all the 10-digit telephone numbers even in the response destination telephone number of the first option data, as in the first and second examples. Since it is sufficient to send the information compressed to 3 digits, the amount of information can be reduced accordingly.

Instead of performing the above-described calculation, a correspondence table for storing the 3-digit compressed telephone number information and the 10-digit telephone number information corresponding thereto is prepared in the receiving device, and the correspondence table is stored. It is also possible to reproduce the response destination telephone number by referring to it.

When using this correspondence table, for example,
The characters "A" and "B" of the DTMF signal sandwich an appropriate number [k (= 0 to 9)] indicating the use of the correspondence table, and the characters "B" and "C" sandwich the compressed telephone number. , The symbols “#” and “#” are used to sandwich the compression method information and the compressed telephone number from the front and back to form a pack, which is distinguishable from the related information of the question of the interactive broadcast program. Will be broadcast.

In each of the above-described embodiments, the case where the encryption processing and the compression processing of the response destination telephone number and the response data are performed independently has been described, but the encryption processing and the compression processing are performed in combination. You may do it. In the case of this composite processing, reduction of the amount of information and further secrecy are achieved.

Further, although the above-mentioned embodiment is an example of making a response using the telegon service, the telephone number of a predetermined reply destination such as a broadcasting station is broadcast as the response destination telephone number in the program-related information. Of course, the present invention can also be applied to the case of directly communicating with a broadcasting station.

The program-related information of the interactive program may be superposed on an empty horizontal section within the vertical blanking period of the video signal. Also, in the case of multiplex broadcasting in which data is multiplexed as a sub-audio signal of audio multiplex, or a signal in a band different from that of a video signal or an audio signal as a main broadcast signal for carrying the multiplexed data is used, Extraction of
It can be dealt with only by changing the decoding process part.

Also, the method of multiplexing the audio as the audible sound is not limited to the case of using the DTMF sound, and various methods can be used as long as they can be separated from the audio of the broadcast program. Can be adopted. For example, it is possible to use a method in which a voice in which a predetermined tone signal is interrupted a plurality of times at a constant cycle is used as a start signal of multiplexed data and a tone according to a certain rule is assigned to each numerical value or symbol.

The present invention can also be applied to satellite broadcasting and cable television broadcasting. Further, in the above-described embodiment, the case where the present invention is applied to the television broadcast and the receiver has been described. However, the sub-broadcast information such as the access data of the bidirectional broadcast is set to a relatively narrow audio like the above example. As long as it is configured by using, for example, a DTMF signal within the band and is multiplexed with the main broadcast audio signal to be broadcast, it can be applied to AM and FM radio broadcasts and PCM audio broadcasts and receivers corresponding to each. Is.

[0149]

As described above, according to the present invention, in a two-way broadcasting system using a telephone line for response, the broadcasting station side uses at least one of a predetermined encryption system and information compression system. The response destination information of the intended broadcast program is secreted and broadcast together with the processing related information such as the type of the encryption key and the compression method. At the receiving side, the response destination information subjected to the secret processing based on the processing related information. Is restored and used for the response to the broadcasting station side, so that the confidentiality of the response destination information to the third party can be maintained.

By similarly secreting the response information from the receiving side, the confidentiality of the response information to a third party can be maintained.

[Brief description of drawings]

FIG. 1 is a conceptual diagram for explaining an encryption process of an embodiment of a bidirectional broadcasting system according to the present invention.

FIG. 2 is a diagram for explaining a process of receiving confidential information in an embodiment of a two-way broadcast receiving apparatus according to the present invention.

FIG. 3 is a flow chart for explaining a decryption process in an embodiment of a bidirectional broadcast receiving apparatus according to the present invention.

FIG. 4 is a diagram showing an overall outline of an embodiment of a bidirectional broadcasting system according to the present invention.

5 is a perspective view showing a configuration of a main part of the reception device of FIG.

FIG. 6 is a conceptual diagram for explaining a response operation in the receiving device in FIG.

7 is a block diagram showing a configuration of a main part of the reception device of FIG.

FIG. 8 is a conceptual diagram for explaining a compression process of response destination information in the interactive broadcasting system according to the present invention.

FIG. 9 is a flow chart for explaining a restoration process in an embodiment of the bidirectional broadcast receiving apparatus according to the present invention.

FIG. 10 is a conceptual diagram for explaining a compression process of response destination information in the interactive broadcasting system according to the present invention.

FIG. 11 is a conceptual diagram for explaining a compression process of response destination information in the interactive broadcasting system according to the present invention.

FIG. 12 is a conceptual diagram for explaining a telephone voting service.

FIG. 13 is a conceptual diagram for explaining the present invention.

FIG. 14 is a conceptual diagram for explaining the present invention.

[Explanation of symbols]

 10 Broadcasting Station System 20 Receiver System 21 Television Receiver 22 Adapter Device Main Body 23 Remote Commander 22MC Microphone 22PD Remote Control Receiver 23SD Light Emitting Unit 23K Operation Button 30 Telephone Station System 31 Telephone Line 217 DTMF Receiver 218 ID Memory 300 Microcomputer 150 Secret information reception processing routine 170 Decryption processing routine 180 Restoration processing routine

Claims (9)

[Claims] 1. A broadcasting side multiplexes predetermined response destination information for a question in a program into a broadcast signal for broadcasting, and a receiving side based on the response destination information extracted from the received multiplexed signal. Connect the communication line with the above respondent,
A two-way broadcasting system in which response information to the question is transmitted, and on the broadcasting side, the response destination information is subjected to a secret processing by a predetermined processing method, and a predetermined processing for specifying the secret processing. Along with the related information, it is multiplexed and broadcast in the broadcast signal, and the receiving side extracts the response destination information and the processing related information that have been subjected to the secret processing from the received multiplexed signal, and based on the processing related information Then, the response destination information that has been subjected to the secret processing is restored to connect the communication line with the response destination. 2. A broadcasting side multiplexes predetermined response destination information for a question in a program into a broadcast signal for broadcasting, and a receiving side based on the response destination information extracted from the received multiplexed signal. Connect the communication line with the above respondent,
A two-way broadcasting system in which response information to the question is transmitted, and the receiving side performs a confidential process on the response information by a predetermined processing system, and a predetermined process related to specify the confidential process. A two-way broadcasting system in which information is transmitted together with information through the communication line, and the broadcasting side restores the confidential response information based on the predetermined processing related information. 3. An encryption process which does not reduce the original information amount of the response destination information or the response information, and an information compression process which reduces the original information amount of the response destination information or the response information. It is at least one and the two-way broadcasting system according to claim 1 or 2, wherein the processing-related information is key information for the encryption processing or information about a compression processing scheme. 4. An audio signal in which the response destination information is multiplexed into a broadcast audio signal and broadcast as an audio signal which can be easily separated from an ordinary audio signal, and which can be easily separated from the ordinary audio signal. Is a DTMF signal, and the processing-related information and the secreted response destination information or response information are related to the question by a specific combination of the function signals corresponding to the characters and symbols of the DTMF signal. The two-way broadcasting system according to claim 1 or claim 2, which is distinguished from the above. 5. The processing-related information and the confidentialized response destination information are separately distinguished from each other by a specific combination of function signals corresponding to the characters and symbols of the DTMF signal, and the confidentiality is also provided. 5. The processing related information is broadcast prior to the processed response destination information.
Interactive broadcasting system described in. 6. A broadcast program receiving section for receiving a broadcast signal and providing a bidirectional broadcast program to a user, and a decoding for extracting and decoding response destination information of the bidirectional broadcast program multiplexed in the broadcast signal. Section, a storage section for storing the response destination information obtained from the decoding section, and response information for the question of the interactive program is transmitted through the communication line based on the response destination information stored in the storage section. A receiver for two-way broadcasting, which includes a communication interface for performing restoration processing for restoring information that has been confidentialized by a predetermined processing method based on predetermined processing-related information. The response destination information that has been subjected to the secret processing from the decoding section is restored based on the processing related information from the decoding section. Receiving apparatus of the direction broadcast. 7. A broadcast program receiving unit for receiving a broadcast signal and providing a bidirectional broadcast program to a user, and decoding for extracting and decoding response destination information of the bidirectional broadcast program multiplexed in the broadcast signal. Section, a storage section for storing the response destination information obtained from the decoding section, and response information for the question of the interactive program is transmitted through the communication line based on the response destination information stored in the storage section. A receiver of two-way broadcasting provided with a communication interface for performing confidential processing of information by a predetermined processing method, and secret processing means for generating predetermined processing related information for specifying the confidential processing. The response information is secretly processed by the confidentiality processing means and is sent out through the communication line together with the processing related information. Feeding of the receiving device. 8. An encryption processing means in which the secret processing means does not reduce the original information amount of the response destination information or the response information, and an information compression processing for reducing the original information amount of the response destination information or the response information. The interactive broadcast receiving device according to claim 6 or 7, which is at least one of the means. 9. The decoding unit adds DT to the broadcast audio signal.
The secret processing-processed response destination information and the processing-related information that are multiplexed in the form of an MF signal are extracted, and the decompression processing means specifies the function signal corresponding to the characters and symbols of the DTMF signal. The interactive broadcast receiving apparatus according to claim 6 or 7, wherein the processing-related information and the secreted response destination information are identified based on a combination.