JP3295531B2 - RDS receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to EON information (Enhanced
The present invention relates to an RDS receiver that can automatically interrupt and receive an information program specified by another network station using Other Networks Information).

[0002]

2. Description of the Related Art RDS (Radio Data System) is an international radio communication advisory committee (CCI).
This is an FM multiplex broadcasting system recommended in R), and provides various services mainly for car radios, such as displaying the name of a broadcasting station, automatically selecting a station, and automatically receiving traffic information.

Conventionally, in the automatic reception of traffic information in an RDS receiver, it was possible to receive only the traffic information of a receiving station preset in the receiver and its affiliated stations, that is, the own network station. For this reason, when the traffic information program is not broadcast on the own network, there is a problem that the traffic information cannot be heard forever.

In order to solve such a problem, the present applicant has previously filed an application for a traffic information receiving method capable of automatically receiving a traffic information program of another network station (Japanese Patent Application No. 4-213910). reference). The traffic information receiving method of this prior application detects that a traffic information program has started to be broadcast at another network station by using the newly established EON information comprising 14A and 14B groups,
The receiving station of the receiver is automatically switched from a preset network station to another network station, and traffic information being broadcast on another network is interrupted and received.

[0005]

However, in the case of the invention of the prior application, when the broadcast of the traffic information of the other network station interrupted and received is completed, the RDS receiver automatically returns to the original receiving station of the own network. It was like that.
For this reason, if the user wants to continue receiving the interrupt receiving station as it is while interrupting reception of a broadcast station of another network, first, the interrupt mode setting button provided on the operation unit To cancel the interrupt mode, perform a new search operation,
A complicated operation of adjusting to the frequency of the interrupt receiving station was required. Also, with the release of the interrupt mode, the receiving station temporarily returns to its original network station before receiving the interrupt, so that the broadcast of the interrupt receiving station is interrupted. For this reason, there has been a demand for an RDS receiver which can directly set the station receiving the interrupt as the own network station.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. It is an object of the present invention to enable an interrupt receiving station to be directly set as its own network station while receiving an interrupt, An object of the present invention is to provide an RDS receiver that can continuously listen to the interrupt receiving station without returning to the previous original receiving station.

[0007]

To achieve the above object, the present invention provides a method for receiving an RDS broadcast wave including EON information.
A capacity of RDS receiver, the interruption mode setting means for specifying an interrupt to a particular information program, a data storage means for collecting and storing the broadcasting station frequency data of other network included in the EON information A broadcast start detecting unit configured to detect a start of a broadcast of a specific information program of the specified other network based on predetermined data included in the EON information, and a switching instruction unit of own and other networks, Broadcast start detection during reception of own network
By means, when the broadcast start of the designated information program of the other network is detected, searches the broadcasting station of another network based on the broadcast station frequency data stored in said data storage means and the Specified information program
While the broadcast is being broadcast, an interrupt is received, and when the switching instruction means issues a switching instruction of the own / other network during the interrupt receiving , the interrupt receiving station is set to the own network.
By re-setting as a network station,
The receiving station's network as its own network
And it is characterized in that the interruption reception reception return Previous of its own network broadcasters were to be prohibited.

[0008]

[0009]

[0010]

The RDS data contains 0 to 1 including undefined groups.
It is composed of 16 types of groups up to 5 groups. Recently, among the undefined groups of the RDS data, groups 14A and 14B have been newly established for EON information as shown in FIG. As a result, it is possible to transmit not only the information of the current network that is currently receiving, but also the information of other networks that are not receiving. The present invention has been made using the newly established EON information of the 14A and 14B groups.

First, the data format of the EON information shown in FIG. 5, which is a precondition for establishing the present invention, will be described. In FIG. 5, (TN) added after each code indicates data on the own network (This Network).
(ON) indicates that the data is for another network (Other Network).

In the 14A group of FIG. 5A, the first block is provided with a program identification code PI (TN) of its own network. The PI (TN) code is composed of 16 bits of a country code (4 bits), a broadcast area code (4 bits), and a program reference number code (8 bits). This is a code that allows you to continue listening to the same program while moving.

The second block of the 14A group includes a group type code (Group type code), a version bit B ₀ , a traffic station code TP (TN), a program type code PTY (TN), and a traffic station code TP (O
N), and an information classification code (Usage code).

[0014] Group type code
Is a 4-bit code for identifying what is transmitted in the data transmitted thereafter, and designates 16 groups from 0 to 15 using 4 bits, followed by the version bit Version A or B is designated by B ₀ (1 bit). B ₀ = 0 indicates the A version, and B ₀ = 1 indicates the B version. Therefore, 14
The group type code of group A is given as “11100” as shown in FIG. 5A, while the group type code of group 14B is given as “11101” as shown in FIG. 5B. Can be

The traffic program code TP (TN) is 1 indicating whether or not a traffic program station currently exists in the own network.
It is a bit code. Program type code PTY
(TN) is a 5-bit code for identifying 32 types of program types (music program, news program, sports program, etc.) from 0 to 31, and is assigned a program type based on a predetermined rule. I have.

The traffic program station code TP (ON) is a 1-bit code indicating whether a traffic program station currently exists in another network. Therefore, this TP (O
N) By constantly monitoring the code, it is possible to know in real time whether or not a traffic program station exists in another network.

The information classification code (Usage code) is a 4-bit code indicating what kind of information is sent in the next third block, as shown in FIG. 5A. Are 4-bit codes "0000" to "1111".
, 16 types of information from (0) to (15) are defined.

In the third block (0) to (3), the character codes (char.1 to char.8) of the broadcast station name are described.
(4) Broadcast station frequency data AF (ON) of another network in the method A (Method A) format, and (5) to (9) mapped frequency (Mapppe).
d frequency) format and the broadcast station frequency data of another network (Mapped FM freq. (ON)) are described. As the broadcast station frequency data of (4) or (5) to (9), one of the formats is selected in advance by each broadcast station, and the broadcast station frequency data is transmitted according to the selected format.

(10) and (11) are undefined, (12) is linking information, (13) is the program type code PTY (ON) and traffic announcement code TA of another network, and (14) is A broadcast start schedule code PIN (ON) of another network is given. (15) is a data area dedicated to a broadcasting station. In the fourth block, a program identification code PI (ON) of another network is given.

On the other hand, in the 14B group of FIG. 1B, the first block is provided with the program identification code PI (TN) of its own network. The second block includes a group identification code “11” indicating the 14B group.
101 ", traffic program code TP (TN), program type code PTY (TN), traffic program code TP
(ON), and a traffic announcement code TA (ON). Therefore, by monitoring the traffic announcement code TA (ON) of this other network, it is possible to know that any station in the other network is broadcasting traffic information.

The third block of the 14B group is provided with a program identification code PI (TN) of its own network, and the fourth block is provided with a program identification code PI (ON) of another network.

An RDS receiver according to the present invention is provided by using the EON information. When the broadcast start detecting means detects the start of the broadcast of a specific information program on another network from the EON information, the data storage is performed. The broadcast station of another network is searched based on the broadcast station frequency data stored in the means, and the broadcast station broadcasting the information program is interrupted and received.

If the switching instruction means issues a switching instruction of the own / other network during the reception of the interrupt, the interrupt receiving station of the received other network is reset as the own network station. As a result,
The network of the broadcasting station receiving the interrupt becomes the new own network (hereinafter, the interrupt receiving station is referred to as the own network).
Set to work, write).

In general, a specific information program (for example, a traffic information program) is usually performed at a certain time interval. Therefore, once the broadcasting of a specific information program ends, the possibility that the specific information program is broadcast again in a very short time at the broadcasting station is extremely low. Therefore, according to the first aspect of the present invention, after the interruption reception is completed, by setting the interruption reception station as its own network again, it is possible to efficiently detect another network station which is likely to broadcast a specific information program. It is like that.
By doing so, it becomes possible to interrupt and receive a specific information program of another network station within a shorter time.

[0025]

[0026]

[0027]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the RDS receiver according to the present invention. In FIG. 1, portions indicated by reference numerals 1 to 6 are so-called superheterodyne receivers for FM or FM / AM reception, 1 is an antenna, 2 is a front end, 3 is a detection circuit, 4 is a source selector, Reference numeral 5 denotes an amplifier circuit, and reference numeral 6 denotes a speaker. The front end 2 has a built-in P
By variably controlling the oscillation frequency of an LL circuit (not shown), tuning to a station desired to be tuned is performed.

Reference numeral 8 denotes a band-pass filter (BPF) having a center frequency of 57 KHz for extracting only the RDS signal from the output of the detection circuit 3. Reference numeral 9 denotes an RDS data demodulation circuit for demodulating the RDS signal sent from the band pass filter 7 to original data. 10 is the demodulated R
A memory (RAM) for storing DS data, 11 an operation unit, 12 a display such as a liquid crystal display,
Reference numeral 13 denotes an alarm that includes a piezoelectric buzzer or the like.

Next, a first operation example of interrupt reception in the above embodiment will be described with reference to the flowcharts of FIGS. In the following operation example, a case where a traffic information program is adopted as a specific information program of another network that receives an interrupt will be described as an example. Also, EO
The information classification code (Usage code) of the second block in the 14A group of N information is 0100 = (4),
In the third block, according to the information classification code = (4), broadcast station frequency data AF (ON) of another network
Is described.

Now, the power of the car stereo including the RDS receiver shown in FIG. 2 is turned on (step S1), the selector 4 is set to, for example, the CD side as the reproduction source (step S2), and the reproduction sound of the CD is output from the speaker. It is assumed that the tone is sounded from step 5 (step S3). Further, the operation unit 11
It is assumed that an interrupt setting key (not shown) provided in the is set to receive the traffic information by interruption.

In this state, the front end 2 of the RDS receiver is set to the FM station previously listened to or the preset FM station, and constantly receives the radio wave of the set FM station (step S1). S4). Note that the FM station receiving this is a so-called own network (TN).

The received FM radio wave of the own network station is detected by the detection circuit 3, and only the 57 KHz RDS signal component is extracted by the band-pass filter 8.
The original data is demodulated by the data demodulation circuit 9 (step S5). The system controller 7 determines the demodulated R
Transportation program code TP in group 0A of DS data
(TN) and the traffic announcement code TA (TN) are constantly monitored (step S6). If there is a traffic broadcasting station in another network, TP (TN) = 0, TA (T
N) = 1.

When the traffic program code TP (TN) = 0 and the traffic announcement code TA (TN) = 1 in the 0A group, the system controller 7 determines that a traffic information program station exists in another network ( Step S
7) The data of the subsequently transmitted 14A group is monitored (step S8). When the traffic program code TP (ON) = 1 in the 14A group (step S9), the data of the 14A group is monitored. The broadcast station frequency data AF (ON) of another network described in the three blocks is collected and stored in the memory 10 (step S1).
0).

Next, the system controller 7
The data of group B is monitored (step S11), and 14
Traffic announcement code TA (ON) in group B = 1
, It is determined that the broadcast of the traffic information has started at any of the broadcasting stations of the other networks (step S1).
2) The reception frequency of the front end 2 is stored in the memory 10
Is set to a broadcast station of another network in accordance with the broadcast station frequency data AF of another network stored in step S13 (step S13).

Then, the reception state is determined from the reception signal level of the set station (step S14). If the reception state is good, the station is received as it is. The next station is set based on the data AF, and the same search is repeated (step S
13, S14).

When a station in a good reception state is received, the RDS data of the receiving station is monitored (step S15), and the transport program station code TP (TN) in the 0A group of the RDS data sent from the receiving station is monitored. And the traffic announcement code TA (TN) is monitored (step S16). TP
If (TN) = 1 and TA = 1 are not satisfied, it is determined that the receiving station is not currently broadcasting the traffic information, and step S
Returning to step 13, the search is repeated.

On the other hand, in step S16, the 0A group of the receiving station has TP (TN) = 1 and TA (T
If N) = 1, the system controller 7 determines that the receiving station is currently broadcasting traffic information, and starts interrupt reception of the traffic information of the receiving station (step S1).
7).

That is, the source selector 4 is switched from the CD side to the detection circuit 3 side, and a notification sound indicating that the receiving station has been switched to another network station is emitted from the piezoelectric buzzer 13 (step S18) and reproduced up to that time. Instead of the CD, the traffic information of another network station that has received the interrupt is output from the speaker 6 via the amplifier 5 (step S19).

The notification sound from the piezoelectric buzzer 13 may be the traffic information interrupted and received by the driver listening to the broadcast from the own network station set in advance or the other network station received from the EON information. For example, in the case of the traffic information of the own network station, the piezoelectric buzzer 13 beeps once only while the traffic information of the own network station is sounded, while the other network stations are sounded by the EON information. In the case of traffic information, the piezoelectric buzzer 13 beeps twice.

Note that the notification method is not limited to the method using the piezoelectric buzzer 13, but may be, for example, another method using the speaker 6.
If the volume of the traffic information broadcast from is increased than before, and if the display 12 can change the display color, the display color can be changed according to the receiving station,
If the display color cannot be changed, the display may be blinked.

Furthermore, various methods can be adopted, such as changing the frequency characteristic of the amplifier 5 to switch the reproduced sound from the speaker 6 to a special tone. The point is that it is only necessary to be able to identify whether the currently received traffic information belongs to the own network or to another network interrupted and received by the EON information.

When the interrupt reception of the traffic information of another network station is started as described above, the system controller 7 broadcasts the traffic information of the other network station by the loop of steps S19, S20, S21 and S19. Until the process is terminated, it is monitored whether or not the own / other network switching instruction key (not shown) is operated and a command to switch the own / other network is given.

As the self-other network switching instruction key, a dedicated key may be provided, or the above-described interrupt setting key may be used also as the self-other network switching instruction key. When the interrupt setting key is also used as the own / other network switching instruction key, for example, when the interrupt setting key is pressed longer than usual, it may be interpreted as a self / other network switching command.

When the broadcast of the traffic information being interrupt-received is completed without the switching instruction of the self-other network from the self-other network switching instruction key, 0A transmitted from the other network station receiving the interrupt is received. The traffic announcement code TA (TN) of the group changes from "1" to "0" (Y side in step S21). The system controller 7 knows that the broadcast of the traffic information has ended from this change in TA (TN) (step S22).

In step S23, the source selector 4 is switched to the original CD side, the reception frequency of the front end 3 is switched to the original reception station before interruption reception, and the reproduction sound of the original CD is again transmitted from the speaker 6. Is sounded (step S3).

On the other hand, if the switching of the own / other network is instructed from the own / other network switching instruction key in step 20 before the end of the broadcast of the traffic information, the process proceeds to step S24. The other network station receiving the interrupt is switched to the own network station and set. As a result, the interrupt receiving station broadcasting the traffic information thereafter becomes its own network station, and thereafter, returning to the original receiving station before receiving the interrupt is prohibited.

If the interrupt setting key is pressed and the interrupt mode is released before the end of the broadcast of the traffic information (Y side in step S25), the process shifts to step S28, where the traffic information is transmitted. Even if the broadcast ends, the RDS receiver continues to receive the interrupted broadcast station as it is, the source selector 4 is also kept as it is, and the program of the broadcast station is continuously sounded from the speaker 6. Therefore, if the user wants to continue listening to the interrupt receiving station as it is, a complicated operation of forcibly canceling the interrupt mode and then searching for the receiving frequency of the desired station and adjusting the receiving station again becomes unnecessary.

If no instruction to release the interrupt mode has been given (N in step S25), the process proceeds to step S26, where the source selector 4 is switched to the original CD. Then, the reproduction sound of the original CD is again output from the speaker 6 (step S3), and thereafter, the receiving station of the other network which has received the interrupt becomes the own network station, and the new RDS data is set as the own network station. Start monitoring (step S
4).

FIG. 4 shows a second operation example in the above embodiment. Note that also in the case of the second operation example, step S1
Since the operations up to S18 are exactly the same as those in FIG.
Steps S1 to S18 are not shown.

In the second operation example, when the switching instruction key is received from the switching instruction key at step S20, the interrupt receiving station is switched to the own network station (step S24), and the traffic information is transmitted. Even after the end of the broadcast, the source selector 4 is maintained as it is, and the broadcast of the interrupt receiving station is continuously received as it is (step S28). With such a processing operation, even after the traffic information has been broadcasted by a simpler operation than the first operation example,
It is possible to continue listening to the broadcast of the interrupt receiving station.

The two operation examples described above are based on the case where the traffic information is interrupted as a specific information program.
The interrupt reception according to the present invention is not limited to this traffic information, and can be applied to any information program as long as the broadcast start time of the program can be detected from the EON information.

That is, when the information classification code (Usage code) of the second block of the 14A group = (13), the program type code PTY for another network is used.
Since (ON) has been sent, the type of information program of another network to be interrupted (for example, a music program, a news program, a sports program, etc.) can be designated by this PTY (ON).

In order to know the broadcast time of the designated information program, the broadcast start time of the program is given, for example, when the broadcast of the program is started, the EON information of the 14A group is continuously transmitted a predetermined number of times. The transmission format may be standardized. As a result, by monitoring the EON information of the 14A and 14B groups, it is possible to perform interruption reception for an arbitrary information program on another network.

[0054]

As described above, according to the present invention,
While the interrupt is being received, the switching
When the switching instruction is issued, the interrupt receiving station is reconfigured as the own network station , so that the interrupt
Set the network of the receiving station as your network
It is possible. For this reason, while waiting for the next interruption reception, the interruption reception station that has finished broadcasting the specified specific information program is set as its own network station, and the start of broadcasting of the specific information program of another network station is newly monitored. It is possible to interrupt and receive a specific information program in a shorter time.

[0055]

[0056]

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of an RDS receiver according to the present invention.

FIG. 2 is a flowchart illustrating a first operation example of the embodiment.

FIG. 3 is a flowchart (continuation of FIG. 2) illustrating a first operation example of the embodiment.

FIG. 4 is a flowchart illustrating a second operation example of the embodiment.

FIG. 5 is a diagram showing a data format of EON information.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 2 Front end 3 Detection circuit 4 Source selector 5 Amplification circuit 6 Speaker 7 System controller 8 Band pass filter 9 RDS data demodulation circuit 10 Memory 11 Operation part 12 Display 13 Piezoelectric buzzer

Claims (1)

(57) [Claims] 1. An RDS receiver capable of receiving an RDS broadcast wave including EON information, comprising: an interrupt mode setting means for designating an interrupt to a specific information program; and an RDS receiver for another network included in the EON information. Data storage means for collecting and storing broadcast station frequency data; and based on predetermined data included in the EON information,
Broadcast start detecting means for detecting the start of the broadcast of a specific information program on the specified other network; and switching instruction means for own and other networks.
Te, when the broadcast start of the designated information program of the other network is detected, the designated searches the broadcasting station of another network based on the broadcast station frequency data stored in said data storage means Broadcasted information program
While receiving the interrupt, while receiving the interrupt, when the switching instruction means instructs the switching of the other network, the interrupt receiving station is
By re-setting as your own network station,
Set the receiving station's network as its own network.
Constant and, RDS receiver, characterized in that the interruption reception reception return Previous of its own network broadcasters were to be prohibited.