JP2817294B2 - Radio data system receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a radio data system (hereinafter referred to as "RD
S)), that is, a receiver for receiving a broadcast wave on which a data signal is superimposed, and more specifically, a traffic announcement code (hereinafter, referred to as a “TA code”) in the data signal. ), The present invention relates to an RDS receiver that can receive the same program even if a broadcast program being received is interrupted due to traffic information or the like.

[Conventional technology]

Regarding RDS, for example, “Nikkei Electronics” (1987-8-24, No. 428202-21) published by Nikkei McGraw-Hill Company
As described in detail on page 7), this is a broadcasting system that superimposes digital data for channel selection etc. on FM radio signals and the like, and its standards are summarized by the European Broadcasting Corporation (EBU).

Conventionally, reception of traffic information in a general broadcast is usually performed by paying attention to the announcement announcement of the traffic information broadcast performed immediately before the broadcast of the traffic information, and listening to it. But,
In this method, it is necessary to always pay attention to the contents of the broadcast, which is particularly inconvenient for a driver of an automobile.

On the other hand, in the above-described RDS, by performing various processes on the receiver (machine) side using various data in the data signal, it becomes possible to receive the broadcast more meaningfully. Came.

Conventionally, as a receiver of this type, for example,
The one disclosed in Japanese Patent Publication No. 136830 is known. This device stores the frequency information of a desired station in a storage unit when the received electric field intensity is equal to or lower than a predetermined electric field strength, and then sequentially sweeps the reception band to obtain a frequency of another station of the receiving broadcast station. The information is compared with the frequency information stored in the storage means, and when they do not match, the sweep is further continued,
RDS configured to abort sweep when matched
Receiver.

[Problems to be solved by the invention]

In the above prior art, no consideration is given to a recipient who does not need traffic information.

The present invention has been made in view of the above circumstances, and an object of the present invention is to solve the above-described problems in the conventional technology and to enable continuous reception of a program blocked by a TA code set. It is an object of the present invention to provide an RDS receiver.

[Means for solving the problem]

To achieve the above object, the receiver for RDS of the present invention,
(I) means for storing a frequency list of broadcast stations transmitting the same program as the program being received, which is notified by a data signal;
Means for detecting a first data signal for interrupting a broadcast being received and switching to a broadcast of specific information; and, when the first data signal is detected, searching a frequency list and searching for a program being received. Means for selecting another receivable broadcast station in which the same program is being broadcast and the first data signal is not detected, and receiving a program interrupted by the first data from another broadcast station. Features.

(Ii) In the RDS receiver according to (i), the operation associated with the detection of the first data signal includes an operation of receiving a program interrupted by the first data from another broadcast station;
Switching means for interrupting a broadcast being received and switching to one of operations for receiving specific information is provided.

[Action]

In the receiver for RDS of the present invention, for a receiver who does not need traffic information, when receiving a TA code set, switching is performed so as to receive another broadcast station that does not broadcast traffic information. When traffic information is required, when the TA code set is received, the control setting is switched so that the traffic information is broadcast as usual.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a configuration diagram showing a general configuration example of an RDS receiver according to the present invention. In the figure, 1 is a VHF / FM front end for receiving a broadcast wave, 2 is an FM audio demodulator for demodulating an audio signal in a received broadcast wave, and 3 is a main part of the present invention, which performs demodulation of RDS data. 3 shows an RDS demodulation circuit. The RDS demodulation circuit 3 has a function of decoding the RDS data of the received broadcast wave, detecting / correcting a group synchronization error, and processing various known RDS data, and has a function of determining a TA code. is there.

The audio signal demodulated by the FM audio demodulator 2 is configured to be input to an audio input switching device 6 controlled by a system control circuit 9. On the other hand, a signal input from the VHF / FM front end 1 to the RDS demodulation circuit 3 is subjected to various processes described later in order to obtain RDS information, and then required by a user such as a broadcast station name code (PS code). The RDS information is configured to be displayed on the RDS information display 7.

The audio input section of the recording / reproducing device 5 is connected to the output of the FM audio demodulator 2 described above.
Is connected to the input section of the voice input switching device 6 described above. The recording / playback operation of the recording / reproducing apparatus 5 is controlled by a system control circuit 9 based on a control signal from a TA code discriminating circuit provided in the RDS demodulating circuit 3 as described later. The recording information display 10 is configured to display information such as the fact that traffic information has been recorded and the date and time of recording.

Hereinafter, the operation of the RDS receiver of the present example configured as described above will be described.

In the normal mode without using the recording / playback device 5,
The FM audio signal of the broadcast wave received by the VHF / FM front end 1 is demodulated by the FM audio demodulator 2 and emitted from the speaker 11 as audio via the audio input switching device 6 and the amplifier 4. Is done. In this case, the audio input switching device 6 is controlled by the system control circuit 9 so as to select the output of the FM audio demodulator 2. In this mode, only the demodulation in the RDS demodulation circuit 3 and the processing such as synchronization error detection / correction are performed on the RDS signal among the received signals.

When the driver leaves the receiver, a recording mode using the recording / reproducing device 5 is selected and set. In this case, the processing for the RDS signal of the received signal is changed as follows. That is, the RDS demodulation circuit 3 detects not only the demodulation and the synchronization error detection / correction, but also detects that the TA code is set in the RDS signal among the received signals. In this case, this is detected by the TA code discriminating circuit provided in the RDS demodulation circuit 3 and this information is output to the system control circuit 9. The system control circuit 9 starts the recording operation by the recording / reproducing device 5 based on this signal. In the recording operation, the release of the TA code is detected by the above-described TA code discrimination circuit, and based on this information, the system control circuit 9 stops the recording operation by the recording / reproducing device 5. In this case, as described above, the system control circuit 9 causes the recording information display 10 to display that traffic information has been recorded and information such as the recording date and time.

An outline of the above operation is shown in the flowchart of FIG. When the driver returns to the installation location of the receiver and sees the information indicating that the traffic information on the recording information display 10 has been recorded, the driver operates the recording / reproducing device console 8 to What is necessary is just to reproduce the content recorded in the recording / reproducing device 5.

In order to simplify the operation of the driver, the recording / reproducing device 5 may use a system such as using an IC memory that does not require rewinding after recording. In the case of using a recording means that requires rewinding, such as a method using, the system can be sufficiently put into practical use by having a function of performing automatic rewinding.

According to the above embodiment, when a broadcast station that supplies a traffic announcement has been selected, the traffic announcement can be automatically recorded by determining the TA code in the RDS data. Even if the user is far away, the effect of being able to confirm the content of the traffic announcement later can be obtained.

Next, another general configuration example of the RDS receiver according to the present invention will be described.

FIG. 3 is a configuration diagram showing another general configuration example of an RDS receiver according to the present invention. In this example, a user who wants to listen to a traffic announcement can select a station without being bound by a traffic announcement supply station. In the figure, 1A and
1B, 2A and 2B, 3B are the VHF / FM shown in FIG. 1, respectively.
The same components as those of the front end 1, FM audio demodulator 2, and RDS demodulation circuit 3 are shown. Note that RDS demodulates RDS data.
3 shows a DS demodulation circuit. Note that the RDS demodulation circuit 3A
Unlike the demodulation circuit 3B, it has only the function of decoding the RDS data among the received broadcast waves, detecting / correcting the group synchronization error, and processing various known RDS data, and does not have the TA code discrimination function. It is. Regarding other components, the same reference numerals as those in FIG. 1 indicate the same components as those shown in the example shown in FIG.

The RDS receiver described in this example described below is a VHF / FM
Front end (1) 1A, FM sound demodulator (1) 2A and R
It has a receiving system 1 consisting of a DS demodulation circuit (1) 3A and a receiving system 2 consisting of a VHF / FM front end (2) 1B, FM audio demodulator (2) 2B, and RDS demodulation circuit (2) 3B. , Received power is distributed to and input to the VHF / FM front ends (1) 1A and (2) 1B. Here, the receiving system 1 is used for free channel selection by the user, and the result of data processing in the RDS demodulation circuit (1) 3A is displayed on the RDS information display 7. . On the other hand, the receiving system 2
It is assumed that the user presets the traffic announcement supply station.

 The operation of this example configured as described above will be described below.

As described above, the user presets the reception system 2 to a traffic announcement supply station, and when a traffic announcement is supplied, the traffic announcement is determined by a TA code discrimination circuit provided in the RDS demodulation circuit (2) 3B. The function is detected, and the system control circuit 9A controls the recording / reproducing device 5 to a recording state and starts recording based on the detection. When the traffic announcement has been completed, the TA code discrimination function detects the release of the TA code, and the system control circuit 9A records /
The playback device 5 is stopped.

The system control circuit 9A displays, for example, the broadcast station name and the recording date and time output from the RDS demodulation circuit (2) 3B on the recording information display 10 simultaneously with the start of recording. When the user listens to the recorded traffic announcement, the playback switch 12 is operated to cause the recording / playback device 5 to perform a playback operation via the system control circuit 9A, and at the same time, the sound input switching device 6 Switching to select the output of the playback device 5 to output desired information.

In the above example, an example has been described in which the system control circuit 9A is configured by logic using a microcomputer having a time management function, but the present invention is not limited to this. The recording / reproducing apparatus 5 can be used in the same manner as described in the above-described example.

Hereinafter, the configuration and operation of the RDS receiver of the present invention will be described. That is, it is an RDS receiver for receivers who do not need traffic information. This is an RDS receiver that switches to receive another broadcast station that does not broadcast traffic information when the TA code set is received, when traffic information is not required.

FIG. 4 shows an example of the configuration. In the figure, symbols 1-4,
7, 9, and 11 indicate the same components as those shown in FIG. 1, 13 indicates a memory, and 14 indicates an operation unit.
Reference numeral 15 denotes an operation selection switch at the time of setting the TA code, and reference numeral 16 denotes a PLL circuit for channel selection. The operation of the RDS receiver shown in FIG. 4 is as follows.

First, the user operates the operation unit 14 to tune to the desired receiving station. At this time, a frequency list (AF code) of the broadcasting station transmitting the same program obtained by demodulating the RDS code being received by the RDS demodulation circuit 3 is stored in the memory 13. Thereafter, when the TA code of the broadcast being received is set,
When the selection switch 15 is turned on, a TA code discrimination signal is sent to the system control circuit 9.

The system control circuit 9 gives a search command to the PLL circuit 16 based on the signal received from the TA code determination circuit,
The LL circuit 16 sequentially searches the reception band. When a receivable broadcasting station is received, the system control circuit 9 issues a search stop command to the PLL circuit 16 and stores the RDS code (AF code) of the receiving station in the AF code stored in the memory 13 described above. And sequentially compared.

As a result of the comparison, the AF code stored in the memory 13 and the reception station
If there is a match with the AF code, it is very likely that the broadcast station is broadcasting a program that was blocked by the traffic information announcement. Therefore, if the TA code of the broadcast station is not set, the broadcast of the broadcast station is output from the speaker 11.

Even if the AF code of the received broadcast station matches the AF code stored in the memory 13, if the TA code is set, the broadcast station is also broadcasting traffic information, so further However, it is necessary to select a broadcasting station that is broadcasting a desired program.

The above-mentioned selection switch 15 is normally turned off, and if the user does not want to hear the traffic information, it may be turned on when the above-mentioned TA code is set. If the selection switch 15 is kept off, a broadcast including traffic information can be received as it is.

According to the RDS receiver configured as described above, if the user does not want to listen to traffic information, automatically switch to another station that is broadcasting the same program and does not broadcast traffic information Can be.

Next, another configuration example of the RDS receiver according to the present invention will be described. That is, the broadcasting station name (PS code) in the RDS code
This is an RDS receiver that informs not by display but by voice. This is configured in consideration of the driver's inconvenience, as a receiver driving a car or the like needs to see it with a conventional receiver that displays the PS code. It is a thing.

FIG. 5 shows an example of the configuration. In FIG. 5, symbol 1
4, 7, 9, and 11 indicate the same components as those shown in FIG. 1, 13 indicates a memory, and 14 indicates an operation unit. The memory 13 stores in advance the above-described PS code and audio data corresponding to the broadcast (station) name. The operation of the RDS receiver shown in FIG. 5 is as follows.

First, the user operates the operation unit 14 to tune to the desired receiving station. Then, the system control circuit 9 sets the
The PS code of the received broadcast obtained by demodulating the RDS code by the RDS demodulation circuit 3 is compared with the PS code stored in the memory 13 in advance, and if they match, the corresponding broadcast (station) The name is read from the memory 13 and output from the speaker 11 through the amplifier 4.

As a result of the above comparison, if the PS code stored in the memory 13 does not match the PS code of the receiving station,
The decoded PS code is displayed on the RDS information display 7.

According to the RDS receiver configured as described above, the name of the broadcast (station) selected by the user is notified by voice, so that there is an effect that the safety of the receiver driving a car or the like is improved.

The present invention is not limited to the range described above, and various applications are possible.

〔The invention's effect〕

As described above, according to the present invention, when the user does not want to hear the traffic information, the same program is being broadcast and the traffic information is not being broadcast at the time when the TA code set is received. Automatic switching to reception from other broadcast stations is possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a general configuration example of an RDS receiver to which the present invention is applied, FIG. 2 is a flowchart showing an outline of the operation, and FIG. 3 is another RDS receiver to which the present invention is applied. FIG. 4 is a block diagram showing a general configuration example, FIG. 4 is a block diagram showing one embodiment of a configuration according to the present invention of the RDS receiver of the present invention, and FIG.
The figure is a configuration diagram showing another configuration example of the RDS receiver according to the present invention. 1: VHF / FM front end, 2: FM audio demodulator, 3: RDS demodulation circuit, 5: recording / playback device, 6: audio input switching device, 7: RDS
Information display, 9: system control circuit, 13: memory.

Continuation of the front page (56) References JP-A-1-158883 (JP, A) JP-A-1-195727 (JP, A) JP-A-1-264018 (JP, A) (58) Fields investigated (Int) .Cl. ⁶ , DB name) H04B 1/16

Claims (2)

(57) [Claims] 1. A receiver for a radio data system capable of receiving a broadcast transmitted by superimposing a data signal on a broadcast wave, wherein the same program as the program being received, which is notified by the data signal, is transmitted. Means for storing a frequency list of a broadcasting station being transmitted; means for detecting a first data signal for interrupting a broadcast being received and switching to a broadcast of specific information; and detecting the first data signal. Means for searching the frequency list and selecting another receivable broadcasting station which is broadcasting the same program as the program being received and which does not detect the first data signal. A receiver for a radio data system, which receives a program interrupted by one data from another broadcast station. 2. The radio data system receiver according to claim 1, wherein the operation associated with the detection of the first data signal is performed for a program interrupted by the first data. A switch for switching between an operation of receiving from a broadcasting station and an operation of interrupting a broadcast being received and receiving specific information.