JPH10145313A - Transmission reception system, receiver, reception method and medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the transmission reception system that can limit the range of parties which can easily acquire information and to provide the receiver, the reception method and the medium. SOLUTION: An IC card in which a program number of a main menu of pay information is written is loaded to the receiver. When the reception of multiplex information is started and the IC card is valid (S1), the receiver reads a program number written on the IC card is read (S2). Then the read program number is compared with the program number of the received main menu, and the reception of the main menu is awaited (S3). Upon the receipt of the main menu, the main menu is stored in a memory in the receiver (S4) and displayed on a display section of the receiver (S5).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a transmission / reception system,
The present invention relates to a receiving apparatus, a receiving method, and a medium mounted on the receiving apparatus, and more particularly, to a transmitting / receiving system, a receiving apparatus, a receiving method, and a medium suitable for transmitting / receiving information for a specific person through broadcast waves.

[0002]

2. Description of the Related Art There is a service in which code information such as characters is multiplexed on an FM radio broadcast wave and transmitted, and the multiplexed information (hereinafter referred to as multiplexed information) is displayed on a display device provided in a receiving device. . This FM teletext service has already been put into practical use, for example, as a "visible radio" of the JFN series. Conventionally, in this FM teletext, information is provided free to unspecified persons.

[0003] Information provided in the FM teletext broadcasting service includes a main menu → (sub menu) →
It has a hierarchical structure of programs. In order to receive a program, the receiving device must first acquire a main menu. However, actually, the main menu and the submenu are also defined as one type of program, and these are distinguished by the program number.

[0004] A service for providing information to only a specific person for a fee using the above-mentioned FM teletext broadcasting has been considered. However, in FM teletext broadcasting, since information is carried by broadcast waves, some means for providing information only to a specific person is required.

[0005] As this means, first, scrambling the information can be considered. However, if the scramble key for scrambling the information is simple, the scramble may be easily released. In this case, it is difficult to provide information only to a specific person. On the other hand, if the scramble key is complicated, the setting of scrambling /
Processing for cancellation becomes complicated. For this reason, the cost of the receiving device and the provided information itself increases.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has a transmitting / receiving system and a receiving apparatus capable of limiting the range of persons who can easily obtain information. The purpose is to provide. It is another object of the present invention to provide a medium mounted on the receiving device so that only a specific person can acquire information.

[0007]

In order to achieve the above object, a transmission / reception system according to a first aspect of the present invention provides a transmission / reception system which outputs lower-level information based on higher-level information. A transmitting device comprising: identifier adding means for adding a first identifier to higher-order information; and transmitting means for transmitting the highest-order information to which the first identifier has been added by the identifier adding means. Receiving means for receiving the highest-level information added with the first identifier transmitted from the means, a medium detachably configured and having a second identifier written therein, Comparing means for comparing the first identifier added to the top-level information with the second identifier written on the medium; and in response to a comparison result of the comparing means, the receiving means Received the above Characterized in that and an output means for outputting information.

According to this transmission / reception system, in response to a comparison result between the first identifier added to the information transmitted from the transmission device and the second identifier written on the medium, Since the information is output, it is possible to transmit and receive information directed to a specific person. Moreover, this is very easy because information can be transmitted / received to a specific person only by the presence or absence of the medium and the value of the second identifier.

[0009] Further, by preparing a plurality of media in which different values are respectively written as the second identifier and exchanging the media, it is possible to obtain a plurality of types of information with one receiver. .

This transmission / reception system is preferably applied to FM teletext broadcasting. When applied to FM text multiplex broadcasting, the layered information comprises text information of FM text multiplex broadcasting multiplexed with audio information of FM radio broadcasting, and the highest-order information is FM text multiplex broadcasting. Wherein the first identifier is a program number of the main menu, and the transmitting device further comprises multiplexing means for multiplexing the information into audio information of FM radio broadcast, Transmits the FM radio broadcast audio information in which the information is multiplexed by the multiplexing means, and the receiving means includes a separating means for separating the information from the received FM radio broadcast audio information. ,
The output means is constituted by a display means for visualizing and displaying the hierarchized information.

Here, the program number is used as the first identifier, so that it is not necessary to separately add an identifier to the information. Therefore, there is no waste in transmission capacity due to the first identifier.

[0012] In order to achieve the above object, a receiving apparatus according to a second aspect of the present invention provides a receiving apparatus in which the lower-level information is output based on the upper-level information, and Receiving means for receiving information to which the first identifier has been added; a medium mounting portion on which a medium on which the second identifier has been written is mounted; and a second identifier from the medium mounted on the medium mounting portion Reading means for reading, the comparing means for comparing the first identifier added to the uppermost information received by the receiving means with the second identifier read by the reading means, and the comparing means And output means for outputting the highest-order information received by the receiving means in response to the comparison result.

[0013] Further, the receiving apparatus of the present invention is a receiving apparatus for receiving information obtained by adding a first identifier to the highest information in hierarchical information in which lower information is output based on higher information. Means, storage means for storing the highest-level information to which the first identifier has been received, which has been received by the receiving means, and a medium mounting section for mounting a medium on which a second identifier has been written, Reading means for reading the second identifier from the medium mounted on the medium mounting portion; the first identifier added to the highest-order information stored in the storage means; A configuration may be provided that includes a comparison unit that compares the second identifier, and an output unit that outputs the highest-order information stored in the storage unit in response to a comparison result of the comparison unit.

[0014] The receiving apparatus may further include a discriminating means for discriminating whether or not the medium is mounted on the medium mounting portion, and the output means may determine that the medium is not mounted. Sometimes, the top-level information is not output.

[0015] Further, the receiving apparatus of the present invention receives the information in which the first identifier is added to the highest information in the hierarchical information in which the lower information is output based on the higher information. Means, a medium mounting portion on which a medium on which a second identifier is written is mounted, reading means for reading the second identifier from the medium mounted on the medium mounting portion, and Comparing means for comparing the first identifier added to the highest-order information with the second identifier read by the reading means; and in response to a comparison result of the comparing means, the receiving means It may be configured to include storage means for storing the highest-order information described above, and output means for outputting the highest-order information stored in the storage means.

[0016] The receiving device may further include a discriminating unit for discriminating whether or not the medium is mounted on the medium mounting unit, and the storage unit may determine that the medium is not mounted. Sometimes, the top-level information may not be stored.

Here, the uppermost information includes a third identifier for outputting lower-level information, which is different from the first identifier, and information lower than the uppermost level of the hierarchical information. Is added with a fourth identifier different from the first identifier, and the receiving device further includes: a second receiving unit that receives information lower than the highest level of the hierarchical information; A second comparing unit that compares a third identifier included in the highest-level information received by the receiving unit and a fourth identifier included in lower-level information received by the second receiving unit; In response to the comparison result of the comparing means,
A second output unit that outputs the lower-order information received by the second reception unit.

In the above-mentioned receiving apparatus, for example, the lower-level information is transmitted at a specific time, and the highest-level information includes information indicating a time at which the lower-level information is transmitted. Can be.

In the above-mentioned receiving apparatus, there is further provided a time-measuring means for measuring a current time, wherein time information for effectively using the medium is written on the medium, and the comparing means further comprises: And comparing the current time measured by the timing means with the time information written on the medium.

In the above-mentioned receiving apparatus, for example, the medium is a read-only storage unit in which the second identifier is written, and an interface through which the read unit reads the second identifier from the storage unit. And a part.

[0021] It is preferable that the receiving apparatus is applied to FM teletext broadcasting. That is, the information is FM
FM text multiplex broadcast text information multiplexed with radio broadcast audio information, the uppermost information is a main menu of the FM text multiplex method, and the first identifier is a program of the main menu. A number, the receiving unit includes a separating unit that separates the character information from the received audio information of the FM radio broadcast, and the output unit is configured by a display unit that visualizes and displays the information.
Things.

In order to achieve the above object, the receiving method according to the third aspect of the present invention provides a receiving method in which the lower-level information is output based on the higher-level information, A first step of receiving information to which a first identifier has been added, a second step of inputting a second identifier, and the second step of adding to the top information received in the first step. A third step of comparing the first identifier with the second identifier inputted in the second step; and responding to the comparison result of the third step, And a fourth step of outputting top-level information.

In order to achieve the above object, a medium according to a fourth aspect of the present invention is a medium that is configured to be detachable from a receiving device that receives information to which a first identifier has been added, In response to the result of the comparison with the first identifier, the second receiver outputs the information, and the second identifier is written.

[0024] The medium may further include a second medium for the receiving device to output the information in response to a comparison result between the first identifier and the second identifier added to the information received by the receiving device. And a read-only storage unit in which the identifier is written, and an interface unit from which a circuit in the receiving device reads the second identifier from the storage unit.

[0025]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing a system configuration of FM teletext broadcasting in this embodiment. As shown in the figure, information provided by FM teletext (hereinafter, referred to as multiplexed information) is multiplexed into FM radio broadcast waves, and
From the transmitting device arranged at the M radio broadcasting station 1 to the receiving device 2
Sent to. The receiving device 2 displays the received multiplex information on the display unit.

The IC card 3 is inserted into a slot 2a provided in the receiving device 2. Information described later is written in a memory (EEPROM) in the IC card 3, and the information determines the range of information that can be displayed on the display unit of the receiving device 2. That is, the information can be provided only to the specific person by the IC card 3. Also,
By selling the IC card 3 for a fee, it becomes a means for charging information to be provided.

Information transmitted from the FM radio broadcasting station 1 includes free information available to all persons and paid information available only to specific persons. In addition, the pay information further includes sequential information that can be sequentially received and displayed on the display unit, and the entire information received by a timer and stored in a memory.
There is stored information displayed on the display unit at a desired time by the user. In this system, transmission of the pay information is entrusted to the FM radio broadcasting station 1 from the business operator 4.
In addition, a person who has purchased the IC card 3 can access the company 4 and send information.

In this FM teletext system, information is transmitted according to a DARC format. The format of the DARC system is defined hierarchically. Next, the format of the DARC system will be described with reference to FIGS.

First, the transmission method includes a stereo difference signal (L
-R signal) in accordance with the level of the multiplex signal.
L-MSK (Level controlled Min) to change to 0%
imumShift Keying) modulation scheme is used. Also,
The subcarrier frequency is 76k for 38kHz of the LR signal.
Hz. The bit rate is 16 kbit / s.

Each frame in FM teletext broadcasting is
As shown in FIG. 2, it is composed of 272 blocks. At the beginning of each block, a 16-bit BIC (Block Iden
tification Code) is added. With this BIC, frame synchronization and block synchronization are established. Also,
The block 272 is composed of 190 blocks of data packets and 82 blocks of parity packets. Each packet is composed of a 176-bit information part, a 14-bit CRC (Cyclic Redundancy Code), and an 82-bit parity part. In order to prevent a burst error, interleaving is performed in block units.

In this FM teletext broadcasting system, information to be transmitted includes a program and additional information. Regarding the hierarchy below the data packet, the format configuration differs between the program and the additional information.

First, in the case of a program, as shown in FIG. 3A, a data packet has a 32-bit prefix and 1 bit.
It consists of a 44-bit data block. As shown in FIG. 3B, the prefix includes a service identification, a decoding identification, an information end, an update, a data group number, and a data packet number. Here, the service identification represents the type of the program content, and whether the information is pay information or free information is indicated by the information type included in the service identification.

The data group shown in FIG. 3C is composed of a plurality of data blocks. One data block corresponds to one page of a program (including program management). As shown in FIG. 3D, the data block includes a heading start code (SOH), a data group header, data group data, an end code (END),
And CRC. Here, the end code indicates whether the program is the last page or a linked page.

The data group data comprises a data header and a data unit group as shown in FIG. The data header includes a program number, a total number of pages (for program management), a page number (for pages), and the like. The data unit group is composed of zero or more arbitrary number of data units. The data unit includes a body including character data to be displayed on the display unit of the receiving device, selection control data added to the main menu, and program information indicating a transmission time of a program table.

Next, in the case of the additional information, as shown in FIG. 4A, the data packet is composed of a prefix and a data block as in the case of the program, but the number of bits is different from 16 bits and 160 bits, respectively. FIG.
As shown in (B), the configuration of the prefix is the same as that of the program except that the number of bits is different. further,
As shown in FIG. 4C, a data group is configured by a plurality of data blocks.

The data group is composed of a plurality of segments as shown in FIG. Each segment is
As shown in FIG. 4 (E), it is composed of a segment header and segment data. The additional information is information for supporting reception of an FM broadcast and controlling a receiving device, such as a broadcast station code, a date, a time, and an alternative frequency. These pieces of information are given as segment data.

Next, the configuration of the transmitting apparatus 10 arranged in the FM radio broadcasting station 1 will be described with reference to the block diagram of FIG. The transmitting device 10 includes an encoding device 11, an error correction adder 12, an L-MSK modulator 13, a stereo modulator 1
4, FM modulator 15, transmitting section 16, and transmitting antenna 17
It is composed of

The encoding device 11 generates a data packet from the information on the input program and the additional information. The encoding device 11 also performs a process of adding identification information such as the prefix and the data header described above. The data packet processed by the encoder 11 is input to the error correction adder 12.

The error correction adder 12 processes the data packet generated by the encoding device 11 so that it can be framed and transmitted. That is, in order to prevent a signal burst error, interleaving is performed, and a parity packet (parity in a column direction) is added. The error correction code (EC
C: error correcting code) and parity in the row direction are added.

The L-MSK modulator 13 performs modulation for changing the multiplex level from 4 to 10% according to the level of the stereo difference signal. The output signal (multiplexed signal) of the L-MSK modulator 13 is input to the stereo modulator 14.

The stereo modulator 14 outputs L, R signals of the audio signal.
The signal is modulated into a stereo signal (L + R signal and LR signal), and the L + R signal, the LR signal, and the multiplex signal are added. The FM modulator 15 modulates the stereo signal and the multiplexed signal added by the stereo modulator 14 into an FM signal. The transmitting section 16 transmits the modulated FM signal via the transmitting antenna 17.

Next, the circuit configuration of the receiving device 2 will be described with reference to FIG. As shown in the figure, the receiving device 2 includes a key input unit 21, a display unit 22, a timer unit 23, a receiving antenna 2
4, receiving unit 25, audio reproducing unit 26, multiplexed information reproducing unit 2
7 and a processing unit 28.

The receiving section 25 is an FM tuner 25 for tuning the FM broadcast wave received from the receiving antenna 24.
a, and an FM demodulator 25b that demodulates FM signals (L + R signal, LR signal, and multiplexed signal). The audio reproducing unit 26 demodulates the FM signals (L + R signal and LR signal) demodulated by the FM demodulator 25b into an L signal and an R signal, and the L demodulated by the stereo demodulator 26a. It comprises amplifiers 26b and 26c for amplifying the signal and the R signal, respectively. Amplifier 26
b and 26c are amplified by speakers 26d and 26c.
It is converted to voice by e and output.

The multiplexed information reproducing section 27 includes an FM demodulator 25b.
An L-MSK demodulator 27a that separates and demodulates the multiplexed signal demodulated in step (a), and an error correction decoder 27b that corrects errors of the multiplexed signal demodulated by the L-MSK demodulator 27a based on CRC and parity. Have been.

The processing section 28 has a microprocessor unit (MPU) 28a. In the MPU 28a,
Key input unit 21, display unit 22, clock unit 23, ROM 28
b, RAM 28c, reception data memory 28d, sound unit 2
8e, a card processing unit 28f, an auto dialer 28g, and a reception control unit 28i are connected. Auto Dialer 28
To g, a speaker 28h for outputting a tone signal emitted from the auto dialer 28g is connected.

The ROM 28b stores a processing program of the MPU 28a, fixed messages, and the like. The ROM 28b also stores the program number of the main menu of the free program. The RAM 28c is a key input unit 21
It stores the input information input from the MPU.
28a is used as a work area. The reception data memory 28d stores the received multiplex information.

The alarm section 28e emits an alarm sound according to the processing result of the MPU 28a. Card processing unit 28f
Performs reading and writing of information between the MPU 28a and the EEPROM 31 in the IC card 3 mounted in the slot 2a. Further, the card processing unit 28f sends information indicating whether or not the IC card 3 is mounted in the slot 2a of the receiving device 2 to the MPU 28a.

The auto dialer 28g emits a tone signal and outputs this tone signal through the speaker 28h. The reception control unit 28i adjusts the tuning of the FM tuner 25a in response to the operation of a tuning key (not shown).

The multiplex signal decoded by the error correction decoder 27b is input to the MPU 28a. The MPU 28a uses R
According to the program stored in the OM 28b, for example,
The character data included in the multiplexed signal is expanded to display unit 2
Various processes are performed, such as displaying on the second screen.

The key input unit 21 has keys such as a cursor key and various selection keys, and instructs an operation to be performed by the receiving device 2. . The display unit 22 is configured by a liquid crystal display device, and visualizes and displays received program information. The clock unit 23 measures the current time and the date. The time and date counted by the clock unit 23 are adjusted according to the current time and date in the received additional information.

The MPU 28a, the ROM 28b, the RAM 28c, and the clock unit 23 are backed up even when a power switch (not shown) is turned off in order to receive a stored program timer described later. When receiving the timer, the MPU 28a controls the power of the receiving unit 25 and the multiplexed information reproducing unit 27 to be turned on.

The IC card 3 connected to the card processing section 28f has an EEPROM 31 inside. This E
EPROM 31, as shown in FIG.
a, program number 31b, broadcast station code 31c, validity period 3
1d, the use start date 31e, and the end date 31f are written.

In the area of the information type 31a, a code indicating pay information is written. This information type 31a is
Service identification included in prefix of received multiplexed information (program) (information type indicating free information or paid information)
Is compared to Then, when the comparison results match, the multiplex information can be displayed on the display unit 22.

In the area of the program number 31b, a code indicating the program number of the main menu which can be displayed on the display unit 22 in the main menu of the pay information is written. The program number 31b is compared with the program management of the received multiplex information (program) and the program number included in each page. Then, when the comparison results match, the multiplex information can be displayed on the display unit 22.

In the area of the broadcast station code 31c, a code indicating any FM radio broadcast station is written.
Each FM radio broadcast station has a unique broadcast station code. The broadcast station code 31c is compared with the broadcast station identification included in the received multiplex information (additional information).
Then, when the comparison results match, the multiplex information can be displayed on the display unit 22.

In the area of the validity period 31d, the IC card 3
Is written, that is, a period (for example, 6 months, 1 year, etc.) in which pay information can be acquired is written. When the IC card 3 is inserted into the slot 2a of the receiving device 2 for the first time, the date is written in the area indicating the use start date 31e based on the time data included in the received multiplex information (additional information). . The date calculated from the use start date and the validity period 31d is the IC date.
The expiration date of the card 3 is written in an area indicating the end date 31f.

In order to transmit and receive such information to and from the receiving device 2, the IC card 3 includes an interface unit 32 for connecting the EEPROM 31 to the card processing unit 28f. The EEPROM 31 of the IC card 3 may have an area for writing a descrambling key for descrambling the transmitted information in addition to the above information.

Hereinafter, processing from transmission / reception of information to display of information on the display unit 22 in this embodiment will be described. First, a process of transmitting information from the transmitting device 10 arranged in the FM radio broadcasting station 1 will be described.

To the encoding device 11, paid information and free information and their menus, as well as additional information such as time and broadcast station code are input. The encoding device 11 generates a data packet for transmitting such information as a program or additional information. At this time, the encoding device 11 puts the information into data units and segments,
In addition, addition of a program number to each page of a program (including a main menu and the like) and addition of service identification in a prefix are performed.

Since all programs cannot be received by the receiving device 2 without a main menu, the main menu is input to the encoding device 11 at a predetermined cycle (for example, every 20 seconds). Further, the sequential information is repeatedly input so that the receiving device 2 can sequentially receive the information. On the other hand, the accumulated information is stored in the encoding device 11 only during a specific time zone.
Is input to Further, the additional information is input to the encoding device 11 at a predetermined cycle.

The error correction adder 12 adds ECC and parity to the data block generated by the encoding device 11. Further, the error correction adder 12 performs interleaving, generates a parity packet, and generates frame data.

The level of the frame data generated by the error correction adder 12 is changed by the L-MSK modulator 13 and is added to the stereo signal by the stereo modulator 14.
The output signal of the stereo modulator 14 is converted into a carrier (FM signal) by the FM modulator 15 and transmitted from the transmitting unit 16 via the antenna 17.

Here, in accordance with the input of information to the encoding device 11, the main menu is transmitted at a predetermined cycle, the sequential program is transmitted several times repeatedly, and the stored program is transmitted at a specific time. Further, the additional information is transmitted at a predetermined cycle.

Next, a description will be given of processing from reception of information in the receiving apparatus 2 to display of pay information on the display unit 22. FIG. 8 is a diagram for explaining the concept of receiving and displaying pay information in this embodiment.

As shown in the figure, when the reception of the multiplexed information is started, the receiving device 2 transmits the I
The main menu of the pay information whose program number matches the program number 31b written in the EEPROM 31 in the C card 3 is always received. This main menu is displayed on the display unit 22 after being received. The main menu of the free information is compared with the program number written in the ROM 28b, and the program number 31 written in the EEPROM 31 is compared.
Regardless of b, it is always received and displayed.

The processing until the main menu is displayed on the display section 22 will be described in more detail with reference to the flowchart of FIG. The flow of FIG.
The power supply switch is turned on, and the multiplexed information reception key provided on the key input unit 21 is operated to start the operation.

When the flow starts, it is determined whether or not the IC card 3 is valid. In order to make this determination, the MPU 28a causes the card processing unit 28f to read out the information type 31a, the broadcast station code 31c, and the end date 31f from the EEPROM 31 in the IC card 3, and acquires these pieces of information. Next, these are compared with the service identification (information type) included in the prefix in the received program, the broadcast station code and the date included in the additional information (S1).

Here, the IC card 3 is determined to be valid when the information types match, the broadcast station codes match, and all the conditions whose date is before the end date are satisfied. On the other hand, when even one of these conditions is not satisfied, it is determined that the IC card 3 is not valid. In addition,
If the IC card 3 is not inserted in the slot 2a of the receiving device 2, a signal indicating this is sent from the card processing unit 28f to the MPU 28a. In this case, the MPU 28a
Performs the same processing as when the IC card 3 is not valid.

If it is determined in step S1 that the IC card 3 is not valid, the processing of this flow ends. If it is determined in step S1 that the IC card 3 is valid, the card processing unit 28f
Program number 31 of the main menu of pay information from OM31
Read b. The read program number 31b is the MPU2
8a. (S2).

Next, the MPU 28a compares the program number read out in step S2 with the program number included in the data header of the received program, thereby obtaining the same program number as the program number 31b written in the IC card 3. Is determined by the receiving antenna 24, the receiving unit 25, and the multiplexed information reproducing unit 27 (S3). Step S3 is repeated until it is determined that the main menu has been received.

If it is determined in step S3 that the main menu has been received, the received main menu and the program information attached to the main menu are stored in the reception data memory 28d (S4). However, the main menu and the program information may be stored in the RAM 28c. Then, the main menu stored in the reception data memory 28d is displayed on the display unit 22 (S5).

Next, a sequential program (live) which is a pay program
Will be described on the display unit 22. While the main menu of the sequential program is displayed, the user operates the cursor key of the key input unit 21 to set a cursor (highlighted; not shown) to a desired channel. When the cursor is positioned on the desired channel, the enter key of the key input section 21 is input. Thereby, according to the selection control data unit added to the main menu,
A sequential program corresponding to the key-in number is received and displayed.

Next, a method of displaying a stored program (magazine) as pay information on the display unit 22 will be described. In the main menu of the sequential program, program information indicating the time of transmitting the menu of the stored program and the program table and the program number thereof is added as a data unit, and the program information is stored in the reception data memory 28d.

When the MPU 28a determines that the timer 23 has counted the program table transmission time, the MPU 28a turns on the power of the receiver 25 and the multiplexed information reproducer 27. A program whose program number matches the program number in the program information (that is, the menu and the program table of the stored program) is received, and the received data memory 28
d (or the RAM 28c).

Next, for example, when a predetermined key of the key input section 21 is operated, a menu of stored programs stored in the reception data memory 28d is displayed on the display section 22.
In the displayed menu, a program table is displayed on the display unit 22 by operating the cursor keys in the same manner as in the case of the sequential program. The program table includes the transmission time and contents of the program, the program number not displayed on the display unit 22, and the like.

Then, according to this program table, a stored program to be received is selected. When the transmission time of the selected program comes, the MPU 28a automatically receives the stored program in the same manner as when receiving the menu and the program guide, and stores it in the reception data memory 28d. As a result, the user can display the stored program stored in the reception data memory 28d on the display unit 22 at a desired time and watch it.

If the main menu of the sequential program cannot be received due to the mismatch of the program numbers of the main menu,
The program information indicating the time for sending the menu of the stored program and the program number cannot be obtained. For this reason, the menu and the program guide of the stored program cannot be received, and the stored program cannot be viewed.

As described above, the FM of this embodiment
In the text multiplex broadcasting system, the EEP in the IC card 3
The program number 31b was written in the ROM 31. The program number 31b was compared with the program number attached to the main menu of the received pay information. When the comparison results match, the main menu is displayed on the display unit 22, and the main menu and the program information are stored in the reception data memory 28d (or RAM 28c).

Thus, by assigning a specific program number to the main menu of pay information addressed to a specific person,
Information is addressed to a specific person only by a simple method of determining whether an IC card is to be inserted into the receiving device 2 and whether to insert an IC card into which the program number of the main menu is written. Can be provided.

Further, if a plurality of IC cards having different program numbers in the main menu of the written pay information are prepared, the user can change the IC card to be mounted on the receiving device to change the IC card in one receiving device. Paid information with a plurality of program numbers different can be obtained.

The EEPROM in one IC card
The program numbers of the main menus of a plurality of types of pay information may be written in advance. In this case, a plurality of types of pay programs can be displayed on the display unit 22 without changing the IC card mounted in the slot 20.

Further, as a medium on which a program number is written, E
The IC card 3 having the EPROM 31 was used.
The EEPROM 31 can prohibit data writing, and requires a dedicated device for erasing and rewriting data. Therefore, data in the EEPROM 31 cannot be easily rewritten. Thereby, it is possible to prevent the pay information from being illegally acquired.

In the above embodiment, the IC card 3 is used as a medium for writing the program number of the main menu. However, the present invention is not limited to this. For example, normal ROM
Alternatively, a magnetic card, a magneto-optical disk, or a card on which a barcode is written may be used.

The present invention can be applied not only to the case where the program number of the main menu is written to a medium such as an IC card which is detachable from the receiving device but also to the case where the program number can be given from outside the receiving device. it can. For example,
The main menu program number is also sent to the receiving device individually and stored in the RAM using the call information as additional information, or the main menu program number is written into the ROM by a ROM writer owned by a predetermined agency. The invention can be applied.

In the above embodiment, the IC card 3
When the main menu whose program number matches the program number 31b written in the EEPROM 31 is received, the main menu is temporarily stored in the reception data memory 28d (or RAM 28c).
Stored in. Then, the main menu stored in the reception data memory 28d is displayed on the display unit 22. However, the received main menu may be expanded and displayed on the display unit 22 without being stored in the reception data memory 28d.

Further, regardless of the program number, all the received main menus may be stored in the reception data memory 28d. In this case, the program number of the main menu stored in the reception data memory 28d and the E number in the IC card 3
The main menu may be displayed on the display unit 22 by comparing the program number 31b written in the EPROM 31 with the program number 31b.

In the above embodiment, the program number assigned to each page of the main menu and the E
The program number 31b written in the EPROM 31 is compared with the program number 31b.
Was displayed. However, EEP in IC card 3
The program number 31b in the ROM 31 may be compared with a program table or a program number added to a program in a lower hierarchy than the main menu.

Further, in the above-described embodiment, transmission / reception of information addressed to a specific person is performed by comparing the program number in the multiplexed information with the program number written in the EEPROM 31 in the IC card 3. . However, if a specific program can be reliably identified, it is not necessary to use the program number. For example, a specific program may be identified by a data block number.

In the above embodiment, the program number of the main menu is written in the IC card 3 in order to provide pay information only to a specific person. However, the information provided by the present invention may be free information.

In the above embodiment, the IC card 3
The pay information cannot be displayed on the display unit 22 after the expiration date. However, the expiration date need not be written on the IC card. In this case, the receiving device 2 can always acquire the main menu having the program number written on the IC card if the IC card is mounted.

In the above embodiment, the case where the present invention is applied to a transmission / reception system using FM teletext broadcasting has been described. However, the present invention can be applied to any transmission / reception system through a wireless or wired line (other than a dedicated line) such as a teletext broadcast on a television or the Internet of a personal computer.

In the above-described embodiment, the processing program of the MPU 28a is stored in the ROM 28b in the receiving device 2. However, the program for carrying out the present invention may be stored in a recording medium such as an IC card or a CD-ROM that is detachable from the main body, instead of the ROM of the main body of the receiving apparatus.

[0094]

As described above, according to the present invention,
By comparing the second identifier written on the medium with the first identifier added to the transmitted information, it is possible to transmit and receive information directed only to a specific person. Since this depends only on the presence or absence of the medium and the value of the second identifier,
Very easy.

Further, if a plurality of media on which different data are written are prepared as the second identifier and the medium mounted on the receiving device is exchanged, a plurality of types of information can be obtained with one receiving device. It becomes possible to do.

Further, when the present invention is applied to FM teletext broadcasting, it is necessary to add a first identifier to information transmitted from a transmitting device by using a program number as the first and second identifiers. Absent. Therefore, there is no waste in transmission capacity due to the first identifier.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration of FM teletext broadcasting in an embodiment of the present invention.

FIG. 2 is a diagram showing a frame configuration in FM teletext broadcasting.

FIG. 3 is a diagram showing a data structure of a program in FM teletext broadcasting.

FIG. 4 is a diagram showing a data configuration of additional information in FM teletext broadcasting.

FIG. 5 is a block diagram illustrating a configuration of a transmission device arranged in an FM radio broadcast station according to an embodiment of the present invention.

FIG. 6 is a block diagram illustrating a circuit configuration of a receiving device according to the embodiment of the present invention.

FIG. 7 shows an EEPR in an IC card according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a memory configuration in an OM.

FIG. 8 shows reception / payment of pay information in the embodiment of the present invention.
It is a figure explaining the concept of a display.

FIG. 9 is a flowchart showing processing from the start of receiving multiplexed information to the display of a main menu according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... FM radio broadcasting station, 10 ... Transmission apparatus, 11 ... Encoding apparatus, 13 ... L-MSK modulator, 14 ... Stereo modulator, 15 ... FM modulator, Reference numeral 16: transmitting unit, 2: receiving device, 22: display unit, 23: clock unit, 24: receiving antenna, 25: receiving unit, 27: multiplexed information reproducing unit , 2
7a ... L-MSK demodulator, 28 ... processing unit, 28a ...
MPU, 28b ROM, 28c RAM, 28d
.Reception data memory, 28f: card processing unit, 3: I
C card, 31 ... EEPROM, 32 ... Interface section

Claims (15)

[Claims] 1. An identifier adding means for adding a first identifier to the highest information in hierarchical information in which lower information is output based on higher information, and said first identifier is provided by said identifier adding means. A transmitting unit that transmits the highest-level information to which the identifier of the above is added; and a receiving unit that receives the highest-level information to which the first identifier is transmitted transmitted from the transmitting unit. A removable medium configured with a second identifier written thereon, the first identifier added to the highest-level information received by the receiving unit, and the second identifier written on the medium. 2
A receiving unit comprising: a comparing unit that compares the identifier with the output unit; and an output unit that outputs the highest-order information received by the receiving unit in response to a comparison result of the comparing unit. And transmitting and receiving system. 2. The hierarchized information comprises text information of an FM text multiplex broadcast multiplexed with audio information of an FM radio broadcast, and the top information is a main menu of the FM text multiplex broadcast. The first identifier is a program number of a main menu. The transmitting device further includes a multiplexing unit that multiplexes the information into audio information of FM radio broadcasting. Transmitting the audio information of the FM radio broadcast in which the information is multiplexed by the converting means, the receiving means comprises a separating means for separating the information from the received audio information of the FM radio broadcast, and the output means The transmission / reception system according to claim 1, further comprising: a display unit that visualizes and displays the hierarchized information. 3. A receiving means for receiving information obtained by adding a first identifier to the highest information in hierarchical information from which lower information is output based on higher information, and a second identifier. A medium mounting portion on which a medium written with is written, reading means for reading the second identifier from the medium mounted on the medium mounting portion, and a medium attached to the highest-level information received by the receiving means. Comparing means for comparing the first identifier with the second identifier read by the reading means; and responding to the comparison result of the comparing means, the uppermost information received by the receiving means. An output unit for outputting, a receiving device. 4. A receiving means for receiving information in which a first identifier is added to the highest information in hierarchical information in which lower information is output based on higher information, and Storage means for storing the received top-level information to which the first identifier has been added, a medium mounting section for mounting a medium on which a second identifier has been written, and a medium mounted on the medium mounting section. Reading means for reading the second identifier from the medium; the first identifier added to the highest-order information stored in the storage means; and the second identifier read by the reading means. A receiving apparatus, comprising: comparing means for comparing; and outputting means for outputting the highest-order information stored in the storage means in response to a comparison result of the comparing means. 5. The apparatus according to claim 1, further comprising: a determination unit configured to determine whether the medium is mounted on the medium mounting unit, wherein the output unit determines whether the medium is not mounted when the determination unit determines that the medium is not mounted. The receiving device according to claim 3, wherein the highest-order information is not output. 6. A receiving means for receiving information obtained by adding a first identifier to the highest information in hierarchical information from which lower information is output based on higher information, and a second identifier A medium mounting portion on which a medium written with is written, reading means for reading the second identifier from the medium mounted on the medium mounting portion, and a medium attached to the highest-level information received by the receiving means. Comparing means for comparing the first identifier with the second identifier read by the reading means; and responding to the comparison result of the comparing means, the uppermost information received by the receiving means. A receiving device comprising: a storage unit for storing; and an output unit for outputting the highest-order information stored in the storage unit. 7. A storage device further comprising: a determination unit configured to determine whether or not the medium is mounted on the medium mounting unit, wherein the storage unit determines that the medium is not mounted when the determination unit determines that the medium is not mounted. The receiving device according to claim 6, wherein information is not stored. 8. The uppermost information includes a third identifier for outputting lower-level information different from the first identifier, and includes information lower than the uppermost level of the hierarchical information. A fourth identifier different from the first identifier is added, and a second receiving means for receiving information lower than the highest level of the layered information; Second comparing means for comparing a third identifier included in the highest-order information with a fourth identifier included in lower-order information received by the second receiving means, and a comparison result of the comparing means And a second output unit that outputs the lower-level information received by the second receiving unit in response to the second request.
The receiving device according to the paragraph. 9. The method according to claim 8, wherein the lower-level information is transmitted at a specific time, and the highest-level information includes information indicating a time at which the lower-level information is transmitted. The receiving device according to claim 3. 10. A time measuring means for measuring a current time, wherein time information for effectively using the medium is written on the medium, and the comparing means further comprises: The receiving device according to any one of claims 3 to 9, wherein the measured current time is compared with the time information written on the medium. 11. The medium includes read-only storage means in which the second identifier is written, and an interface unit from which the read means reads the second identifier from the read-only storage means. The receiving device according to any one of claims 3 to 10, wherein: 12. The information comprises text information of an FM text multiplex broadcast multiplexed with audio information of an FM radio broadcast, wherein the uppermost information is a main menu of the FM text multiplex broadcast, The identifier of 1 is a program number of the main menu, the receiving unit includes a separating unit that separates the character information from the received audio information of the FM radio broadcast, and the output unit visualizes the information. The receiving device according to any one of claims 3 to 11, wherein the receiving device is configured by display means for displaying. 13. A first step of receiving information obtained by adding a first identifier to the highest information in hierarchical information in which lower information is output based on higher information, and A second step of inputting an identifier of the first and second identifiers, the first identifier added to the highest-level information received in the first step, and the second identifier input in the second step. A third step of comparing; and a fourth step of outputting the highest-order information received in the first step in response to a result of the comparison in the third step. Method. 14. A medium configured to be detachable from a receiving device that receives information to which a first identifier has been added, wherein the receiving device responds to a result of comparison with the first identifier. Output medium, wherein the second identifier is written. 15. A second identifier is written for the receiving device to output the information in response to a comparison result between the first identifier and the second identifier added to the information received by the receiving device. A read-only storage unit; and an interface unit for reading a second identifier from a circuit in the receiving device from the read-only storage unit.