JPH07336255A - Rds receiver - Google Patents

Abstract

PURPOSE:To receive a specific news program in a shorter time in a way of interruption by setting again a broadcast station during interrupt reception as a concerned network station. CONSTITUTION:When broadcast of traffic information through interrupt reception is finished while no switching command of concerned/other network is received from a concerned/other network switching command key, a traffic announcement code TA(TN) of a 0A group sent from the other network station during interrupt reception changes from '1' to '0'. A system controller 7 recognizes the end of broadcast based on r change in the code TN and throws a source selector 4 to the original position CD and replaces the reception frequency of a front end 2 with that of an original reception station before interrupt reception and the reproduction sound of the original CD is sounded again from a the loud speaker 6. On the other hand, when a concerned/other network switching command is received till the broadcast is finished, the other network station received through interruption at present is replaced with a concerned network station and then the interrupt reception station is selected as the concerned network station.

Description

Detailed Description of the Invention

[0001]

This invention relates to EON information (Enhanced
The present invention relates to an RDS receiver capable of automatically interrupting reception of information programs designated by other network stations by using (Other Networks Information).

[0002]

2. Description of the Related Art RDS (Radio Data System) is an international radio communication advisory committee (CCI).
It is the FM multiplex broadcasting system recommended by R), and provides various services such as station name display of broadcast stations, automatic channel selection, and automatic reception of traffic information, mainly for car radios.

Conventionally, automatic reception of traffic information in an RDS receiver can only receive traffic information of a receiving station preset in the receiver and its affiliated station, that is, its own network station. Therefore, if the traffic information program is not broadcast on the own network, there is a problem that the traffic information cannot be listened to forever.

In order to solve such a problem, the present applicant previously applied for a traffic information receiving method capable of automatically interrupting and 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 by another network station by using EON information consisting of the newly established 14A and 14B groups, and RDS
The receiving station of the receiver is automatically switched from a preset network station to another network station, and the traffic information being broadcast on another network is interrupted and received.

[0005]

However, in the case of the invention of the prior application, the RDS receiver automatically returns to the original receiving station of its own network when the broadcast of the traffic information of the other network station which has received the interruption is completed. Was being done.
For this reason, if you want to continue receiving the interrupt receiving station as it is during interrupt reception of a broadcast station on another network, first set the interrupt mode setting button provided on the operation unit. To forcibly cancel the interrupt mode, then perform another search operation,
A complicated operation of adjusting to the frequency of the interrupt receiving station was required. Further, when the interrupt mode is released, the receiving station once returns to the original network station before receiving the interrupt, which causes a problem that broadcasting of the interrupt receiving station is interrupted. Therefore, there has been a demand for an RDS receiver capable of directly resetting the station receiving the interrupt as the own network station.

The present invention has been made in order to solve the above-mentioned problem, and an object of the present invention is to enable the interrupt receiving station to be directly set as its own network during interrupt reception, and also before interrupt reception. It is an object of the present invention to provide an RDS receiver capable of continuously listening to the interrupt receiving station without returning to the original receiving station.

[0007]

In order to achieve the above object, the invention according to claim 1 is an interrupt mode setting means for specifying an interrupt to a specific information program, and another network included in the EON information. Data storage means for collecting and storing broadcasting station frequency data, and broadcasting start for detecting the start of broadcasting of a specific information program of the specified other network based on predetermined data included in the EON information A detection means and a switching instruction means for switching between own and other networks, and based on the broadcasting station frequency data stored in the data storage means when the broadcasting start of the designated information program is detected by the broadcasting start detecting means. While searching for a broadcast station of another network to receive an interrupt, and while the interrupt is being received, the switching instructing means sends the interrupt to the other network. When there is a conversion instruction, characterized in that so as to disable interrupts reception reception return Previous of its own network station.

According to a second aspect of the invention, in the first aspect of the invention, the interrupt mode is released when an interrupt release instruction is given from the interrupt mode setting means during reception of the interrupt. is there.

According to a third aspect of the present invention, in the first aspect of the invention, when the switching instruction means gives an instruction to switch between the own network and the other network during reception of the interrupt, the own network station before receiving the interrupt is sent. It is designed such that the recovery from reception is prohibited and the interrupt mode is canceled.

[0010]

Function: RDS data contains 0 to 1 including undefined groups
It is composed of 16 types of groups up to 5 groups. Of the undefined groups of this RDS data, recently, groups 14A and 14B have been newly established for EON information as shown in FIG. This makes it possible to transmit not only the information of the own network that is currently being received, but also the information of other networks that have not been received. The present invention has been made by utilizing the EON information of the newly established 14A and 14B groups.

First, the data format of the EON information of FIG. 5, which is a prerequisite for the establishment of the present invention, will be described. In addition, in FIG. 5, (TN) added after each code is data about the own network (This Network), and
(ON) indicates that the data is for another network.

In the 14A group of FIG. 5A, the program identification code PI (TN) of the own network is given to the first block. This PI (TN) code consists of 16 bits of country code (4 bits), broadcast area code (4 bits), and program reference number code (8 bits). It is a code that allows you to continue listening to the same program while you are on the move.

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

Group type code
Is a 4-bit code for identifying what is being sent in the data that is sent after that, using 16 bits to specify 16 groups from 0 to 15 and the version bit after that. The 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 the A group is given as “11100” as shown in FIG. 5 (A), while the group type code of the 14B group is given as “11101” as shown in FIG. 5 (B). To be

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

The traffic program station code TP (ON) is a 1-bit code indicating whether or not 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. 5 (A). The 4-bit code "0000" to "1111"
16 types of information (0) to (15) are defined by using.

Character codes (char.1 to char.8) of the broadcasting station name are described in (0) to (3) of the third block.
In (4), the broadcasting station frequency data AF (ON) of another network in Method A format is used, and in (5) to (9), the mapped frequency (Mapppe) is used.
This section describes the broadcasting station frequency data (Tuning freq. (TN)) of its own network and the broadcasting station frequency data (Mapped FM freq. (ON)) of another network in the d frequencies format. The broadcast station frequency data of (4) or (5) to (9) 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 (Linking Information), (13) is the program type code PTY (ON) and traffic announcement code TA of other networks, and (14). Broadcast start schedule codes PIN (ON) of other networks are respectively given. (15) is a data area dedicated to the broadcasting station. Further, the program identification code PI (ON) of another network is given to the fourth block.

On the other hand, in the 14B group of FIG. 1B, the program identification code PI (TN) of the own network is given to the first block. In the second block, the 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 traffic announcement code TA (ON) are given. Therefore, by monitoring the traffic announcement code TA (ON) of this other network, it is possible to know that the traffic information is being broadcast by any station in the other network.

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

The RDS receiver of the present invention is made by using the EON information, and stores the data when the broadcast start detecting means detects the broadcast start of a specific information program of another network from the EON information. Based on the broadcast station frequency data stored in the means, a broadcast station of another network is searched for, and a broadcast station broadcasting the information program is interrupted and received.

When the switching instructing means gives an instruction to switch between the own network and the other network during the reception of the interrupt, the received interrupt receiving station of the other network is reset as the own network station. With this, after that,
The broadcasting station receiving the interrupt becomes the new own network.

Generally, a specific information program (for example, a traffic information program) is usually performed at a certain fixed time. Therefore, once the broadcasting of the specific information program is completed, it is extremely unlikely that the specific information program will be broadcast again at the broadcasting station within an extremely short time. Therefore, the invention according to claim 1 can efficiently detect another network station having a high possibility of broadcasting a specific information program by resetting the interrupt receiving station as its own network after the interruption reception is completed. It was done like this.
By doing so, it becomes possible to interrupt and receive a specific information program of another network station in a shorter time.

According to a second aspect of the present invention, in the first aspect of the invention, the interrupt mode is released when an interrupt release instruction is given from the interrupt mode setting means. Even if the broadcasting of the specific information program in the station ends, the interrupt receiving station can be continuously listened to as it is.

Further, the invention according to claim 3 is the same as claim 1.
In the invention described above, when there is an instruction to switch between the own network and the other network from the switching instruction means, the recovery of reception to the own network station before interrupt reception is prohibited and the interrupt mode is also canceled. Even if the broadcasting of the specific information program at the interruption receiving station is completed by a simple operation, it is possible to continue listening to the interruption receiving station.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of an RDS receiver according to the present invention. In FIG. 1, reference numerals 1 to 6 denote so-called super-heterodyne 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 is an amplifier circuit, and 6 is a speaker. The front end 2 is a P built in by the system controller 7.
By tuning the oscillation frequency of an LL circuit (not shown), tuning is tuned to the desired station.

Reference numeral 8 is a bandpass 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 that demodulates the RDS signal sent from the bandpass filter 7 into original data. 10 is the demodulated R
A memory (RAM) for storing DS data, 11 is an operation unit, 12 is a display such as a liquid crystal display,
Reference numeral 13 is a notification device including a piezoelectric buzzer or the like.

Next, with reference to the flow charts of FIGS. 2 and 3, a first operation example of interrupt reception in the above embodiment will be described. In the following operation example, a case where a traffic information program is taken 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 this information classification code = (4), broadcasting station frequency data AF (ON) of another network.
Is described.

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

In this state, the front end 2 of the RDS receiver is set to the FM station that was heard last time or the preset FM station, and always receives the radio wave of the set FM station (step S4). The receiving FM station 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 to obtain the RDS signal.
The data demodulation circuit 9 demodulates the original data (step S5). The system controller 7 uses this demodulated R
Traffic program station code TP in the 0A group of DS data
(TN) and the traffic announcement code TA (TN) are constantly monitored (step S6). When a traffic broadcasting station exists in another network, TP (TN) = 0, TA (T
N) = 1 is set.

When the traffic program station 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 14A group sent subsequently is monitored (step S8), and when the traffic program station code TP (ON) = 1 in the 14A group (step S9), the data in the 14A group is checked. Broadcasting station frequency data AF (ON) of another network described in 3 blocks is collected and stored in the memory 10 (step S1).
0).

The system controller 7 then proceeds to 14
Data of group B is monitored (step S11), 14
Traffic announcement code TA (ON) = 1 in group B
When it becomes, it is determined that the broadcasting of the traffic information has started at any broadcasting station of the other network (step S1).
2) the reception frequency of the front end 2 is stored in the memory 10
According to the broadcasting station frequency data AF of the other network stored in the above, the broadcasting station of the other network is set (step S13).

Then, the reception state is judged from the received signal level of the set station and the like (step S14). If the reception state is good, the station is received as it is, and if the reception state is bad, the broadcast station frequency is received. 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 traffic program station code TP (TN) in the 0A group of the RDS data sent from the receiving station is monitored. Then, 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 traffic information, and step S
Returning to step 13, the search is repeated.

On the other hand, in step S16, the OA group of the receiving station is TP (TN) = 1 and TA (T
If N) = 1, the system controller 7 determines that the receiving station is currently broadcasting the 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 sounded from the piezoelectric buzzer 13 (step S18) and is reproduced up to that point. Instead of the CD that has been played, the traffic information of the other 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 is either the own network station whose traffic information interrupted by the driver listening to the broadcast is preset, or another network station received by the EON information. This is to make it possible to reliably identify whether or not it is one. For example, in the case of the traffic information of the own network station, the piezoelectric buzzer 13 beeps only once, while the other network stations according to the EON information In the case of traffic information, the piezoelectric buzzer 13 is buzzed twice.

Note that this notification method is not limited to the method using the piezoelectric buzzer 13;
If the volume of the traffic information broadcast from is increased more 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.

Further, various methods such as changing the frequency characteristic of the amplifier 5 to switch the reproduced sound emitted from the speaker 6 to a special timbre can be adopted. In short, it suffices to be able to identify whether the currently received traffic information belongs to the own network or the other network that has received the interrupt by the EON information.

When the interruption 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 end, it is monitored whether or not the own-other network switching instruction key (not shown) is operated and the own-other network switching command is given.

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

Now, when the broadcast of the traffic information which is being interrupted is completed without the switching instruction of the own and other networks from the own and other network switching instruction key, 0A sent from the other network station which is receiving the interrupt. 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 broadcasting of the traffic information has ended from this change in TA (TN) (step S22).

Then, 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 receiving station before the interrupt reception, and the reproduction sound of the original CD is reproduced from the speaker 6. Is sounded (step S3).

On the other hand, when the self-other network switching instruction key is issued from the self-other network switching instruction key in step 20 until the end of broadcasting the traffic information, the process proceeds to step S24, Switch to another network station that is receiving an interrupt and set it to the local network station. As a result, after that, the interruption receiving station broadcasting the traffic information becomes the own network station, and thereafter, returning to the original receiving station before the interruption reception is prohibited.

When the interruption setting key is pressed and the interruption mode is released by the time the broadcast of the traffic information is completed (Y side of step S25), the process proceeds to step S28 and the traffic information Even after the broadcast ends, the RDS receiver continues to receive the interrupted broadcast station, the source selector 4 is also maintained, and the speaker 6 continuously plays the program of the broadcast station. Therefore, when it is desired to continue listening to the interrupt receiving station as it is, it is not necessary to perform a complicated operation such as once forcibly canceling the interrupt mode and then searching the reception frequency of the desired station again to match the receiving stations.

If the instruction to cancel the interrupt mode is not given (N side of step S25), the process proceeds to step S26, and the source selector 4 is switched to the original CD side. Then, the reproduction sound of the original CD is emitted from the speaker 6 again (step S3), and thereafter, the receiving station of the other network that has received the interrupt becomes the own network station, and the new station receives the new RDS data as the own network station. Starts monitoring (step S
4).

FIG. 4 shows a second operation example in the above embodiment. In the case of this second operation example as well, step S1
Since the operation up to S18 is exactly the same as in FIG.
Illustration of steps S1 to S18 is omitted.

In this second operation example, at step S20, when the switching instruction key is instructed to switch the own network and the other network, the interrupt receiving station is switched to the own network station (step S24), and the traffic information is transferred. Even after the broadcast ends, 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 broadcast of the traffic information is completed, the operation is simpler than that in the first operation example.
It is possible to continue listening to the broadcast of the interrupt receiving station.

In the above two operation examples, the case of interrupting the traffic information as a specific information program is taken as an example.
The interrupt reception of 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, the information type code (Usage code) of the second block of the 14A group = (13), and the program type code PTY for other networks.
Since (ON) is sent, it is possible to specify the type of information program of another network (for example, music program, news program, sports program, etc.) to be interrupted by this PTY (ON).

Further, in order to know the broadcast time point of the specified information program, the broadcast time point of the program is given by, for example, continuously transmitting the EON information of the 14A group a predetermined number of times at the start time of the broadcast of the program. The transmission format should be standardized. As a result, by monitoring the EON information of the 14A and 14B groups, it is possible to perform interrupt reception for an arbitrary information program on another network.

[0054]

As described above, according to the present invention as set forth in claim 1, it is possible to re-set a broadcasting station during interrupt reception as its own network station. For this reason, during the next interrupt reception standby, the interrupt receiving station that has finished broadcasting the specified specific information program should be set as its own network station and newly start the broadcasting of the specific information program of another network station. Therefore, it is possible to interrupt and receive a specific information program in a shorter time.

According to the second aspect of the present invention, even after the broadcasting of the specific information program at the interruption receiving station is finished, the interruption receiving station can continue to listen to the broadcasting of the interruption receiving station.

Further, according to the third aspect of the invention, even if the broadcasting of the specific information program at the interruption receiving station is finished, the broadcasting of the interruption receiving station is continuously listened to by a simpler operation. be able to.

[Brief description of drawings]

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

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

FIG. 3 is a flowchart (sequel to FIG. 2) showing the first operation example of the embodiment.

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

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

[Explanation of symbols]

 1 Antenna 2 Front End 3 Detection Circuit 4 Source Selector 5 Amplification Circuit 6 Speaker 7 System Controller 8 Bandpass Filter 9 RDS Data Demodulation Circuit 10 Memory 11 Control Panel 12 Display 13 Piezoelectric Buzzer

Claims (3)

[Claims] 1. An RDS receiver capable of receiving an RDS broadcast wave containing EON information, comprising: an interrupt mode setting means for designating an interrupt to a specific information program; and another network included in the EON information. Data storage means for collecting and storing broadcasting station frequency data, and based on predetermined data included in the EON information,
A broadcast start detecting means for detecting a broadcast start of a specific information program on the specified other network; and a switching instruction means for own network and the other network, wherein the broadcast start of the specified information program is detected by the broadcast start detecting means. When it is detected by, the broadcasting station of the other network is searched based on the broadcasting station frequency data stored in the data storage means to receive an interrupt, and during the reception of the interrupt, the switching instructing means of the own network The RDS receiver is characterized in that when a switching instruction is given, the return of reception to its own network station before interrupt reception is prohibited. 2. The RDS receiver according to claim 1, wherein the interrupt mode is canceled when an interrupt cancellation instruction is given from the interrupt mode setting means during reception of the interrupt. Receiving machine. 3. The RDS receiver according to claim 1, wherein when the switching instruction means gives an instruction to switch between the own network and the other network during interrupt reception, the recovery of reception to the own network station before interrupt reception is prohibited. At the same time, the RDS receiver is characterized in that the interrupt mode is also canceled.