JPH0531353U - RDS receiver - Google Patents

Abstract

(57) [Summary] [Purpose] In the traffic information priority mode, while partially leaving the automatic seek function, eliminate the uncomfortable automatic seek during EON data reception. [Structure] In S1, EO is added to the RDS data of the station currently being received.
It is determined whether or not N (augmented other network) group type 14A data is included, and if there is 14A data, the process proceeds to S2. In S2, it is determined whether or not the currently receiving station can receive the traffic information. If it is possible, the process proceeds to S3, and if not, the process proceeds to S9. S9
Then, it is the first time that the traffic information cannot be received, and it is determined whether or not the beep condition is satisfied. If the beep condition is satisfied, the process proceeds to S10. In S10, a beep is emitted and then the process proceeds to S1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radio receiver that uses RDS (Radio Data System), and particularly uses the AF (alternative frequency) list in RDS to select the strongest signal from the frequencies transmitting the same program. It also relates to receivers that automatically search for traffic information stations.

[0002]

[Prior Art]

 There is known an RDS (radio data system) in which a receiver has various functions by adding an inaudible signal to a VHF-FM transmission signal. The RDS receiver automatically selects the strongest signal having the same broadcast content by using the AF (Alternative Frequency) list included in such RDS data, and also the station currently broadcasting the traffic information. The RDS data includes data indicating that the traffic information can be received and data indicating that the traffic information is being broadcast.

Further, the ARI-compatible station includes a signal in which a carrier of 57 Khz is AM-modulated with 6 kinds of frequencies in a voice signal to indicate that the own station is a traffic information receivable station and that the traffic information is being broadcast. ing.

FIG. 3 shows an example of the operation of the conventional RDS and ARI compatible receiver in the traffic information priority mode. In step S1, it is determined whether the currently receiving station can receive traffic information. TP = 1 in the RDS data indicates that the local station can receive traffic information. TP = 0 and TA = 1 are included in the group type 14A data of EON (enhanced other network), but the traffic information is not broadcast at the local station but is notified by the RDS data when the traffic information is broadcast at another station. It is shown that. SK is a carrier of 57Khz of ARI, and BK indicates that SK is AM-modulated. The presence of SK and BK indicates that the local station can receive traffic information.

Therefore, if TP = 1, TP = 0 and TA = 1 or if SK and BK are present, it indicates that traffic information can be received. In that case, the process proceeds to step S2, and otherwise. In that case, the process proceeds to step S13.

In step S2, it is determined whether or not the own station is broadcasting traffic information. RDS TP = 1 and TA = 1 indicate that the local station is broadcasting traffic information, and ARI DK indicates that it is a signal that AM-modulates a carrier of 57 Khz at 125 Hz and is broadcasting traffic information. Therefore, if either TP = 1 and TA = 1 or SK and BK and DK are present, it means that the own station is broadcasting the traffic information. In that case, the process shifts to step S8, and otherwise. Control goes to step S3.

In step S8, as the traffic information interrupt mode, the sound of the CD player or the tape recorder is switched to the sound of the radio receiver when the sound is being output from the speaker, and the volume is set to a predetermined value when the sound of the radio receiver is heard. Up to step S9. In step S9, the process waits until the traffic information broadcast ends, and when the traffic information broadcast ends, the process proceeds to step S10. In step S10, the state before the traffic information interrupt mode is restored and the process proceeds to step S1.

In step S3, it is determined whether or not the traffic information has been started for another network station whose information is sent to the EON RDS data. When traffic information is started by another network station, 14B type data is sent 8 times. If it is determined that there is traffic information in step S3, the process proceeds to step S4, and if it is determined that there is no traffic information, the process proceeds to step S1.

In step S4, the EON AF list is stored, and it is determined whether or not the AF search is possible. If yes, the process proceeds to step S5, and if not, the process proceeds to step S1. In step S5, it is determined whether or not the station can be received by switching to the station in the traffic information broadcast indicated by the 14B type data obtained in step S3. If reception is possible, the process proceeds to step S6, and if reception is not possible, the process proceeds to step S11. In step S11, the receiving station is returned to the frequency before switching in step S5, and the process proceeds to step S1.

In step S6, the traffic information interruption mode is switched to the sound of the radio receiver when the sound of the CD player or the tape recorder is being played from the speaker, and the volume is set to a predetermined value when the sound of the radio receiver is heard. Up to step S7. In step S9, the process waits until the traffic information broadcast ends, and when the traffic information broadcast ends, the process proceeds to step S12. In step S12, the state before the traffic information interrupt mode is restored, and in step S5, the receiving station is returned to the frequency before switching, and the process proceeds to step S1.

In step S13, it is determined whether or not a state in which it cannot be confirmed that the currently receiving station is a traffic information broadcasting station continues for 5 seconds. In the RDS data, if TP = TA = 0 and there is no SK and BK of ARI, the traffic information cannot be received. In that case, the process proceeds to step S14, and otherwise, the process proceeds to step S1.

In step S14, the traffic information receiving station is searched while gradually changing the frequency, and it is determined whether or not the station searched in step S15 is a traffic information receivable station. When it is determined that the station searched in step S15 can receive the traffic information, the process proceeds to step S16, the receiving station is switched to the above station, and the process proceeds to step S1.

[0013]

[Problems to be solved by the device]

 As described above, the conventional receiver is a traffic information receivable station in the traffic information priority mode when the current receiving station is not a traffic information receivable station, or even if the radio wave condition is poor and even a traffic information receivable station. When TP, SK, and BK cannot confirm that it is, it automatically seeks and searches the traffic information station.

However, if the strongest signal having the same broadcast content is automatically selected using the AF (alternative frequency) list based on the EON data, there may be no data related to the traffic information broadcast in different areas. For example, if a station that moves while receiving a traffic information receivable station and is moved by AF search is a station that cannot receive the traffic information, it automatically seeks even though the reception status is good, which causes a great sense of discomfort. was there.

The present invention has been made in view of the above points, and an object thereof is to eliminate a strange automatic seek during reception of EON data while partially leaving the automatic seek function. Is to provide a machine.

[0016]

[Means for Solving the Problems]

 The RDS receiver of the present invention can receive the RDS data, can search the AF station by using the PI code and the AF list, and can automatically switch the receiving station to the station having a good reception state. In the receiver that decodes EON, TP, TA data of EON and detects SK, BK, DK of ARI, the station currently receiving is receiving traffic information while EON group type 14A data is being input in the traffic information priority mode. Even if the station is not a reliable station, do not search the traffic information station by automatic seek, and if the station currently receiving is not the traffic information receivable station because the EON group type 14A data is not input for a predetermined period, it is automatically searched. It is configured to search the Traffic Information Bureau.

Further, the RDS receiver is configured to emit a beep when in a traffic information priority mode and a station currently receiving is not in a traffic information receivable station.

[0018]

[Action]

 According to the RDS receiver of the present invention, the traffic information station search is not performed by the automatic seek while the data of the EON group type 14A is input, so that the broadcast content changes when the reception condition is good. Disappears. The data of other groups are included in the data of the EON group type 14A, and it is possible to automatically switch the receiving station to a station with a good reception state by using the AF list.

Then, in the traffic information priority mode, if a beep is made to be issued when the currently receiving station is not in the traffic information receivable station, the traffic information receivable station can be changed to the traffic information unreceivable station. Since the listener recognizes it when moving to, it is possible to manually switch to the communication information receivable station.

[0020]

【Example】

 A radio receiver according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of a receiver which is an embodiment of the present invention. In the figure, 1 is a front end, which includes a high frequency amplifier, a voltage controlled oscillator and a mixer, converts the frequency of the received radio wave into an intermediate frequency and outputs it to the intermediate frequency amplification detector 2.

The intermediate frequency amplification detector 2 amplifies the FM-modulated intermediate frequency signal as an input signal, demodulates it, and outputs it to the noise canceller 3, the RDS data demodulator 9, and the ARI demodulator 14. Further, a DC signal indicating the level of the intermediate frequency signal is output to the input port of the AD converter included in the system microcomputer 11.

The noise canceller 3 cuts the wave of the input signal for a short period when the level of the component exceeding the predetermined frequency of the input signal exceeds a certain limit, and normally outputs the input signal as it is to the stereo demodulator 4. The stereo demodulator 4 separates the audio signals of the R and L channels from the composite wave signal of the R and L channels and outputs them to the volume controller 5.

The volume controller 5 adjusts the level of the audio signal and outputs it to the mute circuit 6. The mute circuit 6 outputs an input signal to the power amplifier 7 according to the output signal of the system microcomputer 11, or the output is prohibited. The power amplifier 7 amplifies the input signal and drives the speaker 8.

The RDS data demodulator 9 extracts RDS data from the signal demodulated by FM in the intermediate frequency amplification detector 2 and outputs it to the RDS data synchronizer 10. The RDS data synchronizer 10 separates continuous RDS data and outputs it to the system microcomputer 11. The ARI demodulator 14 demodulates the ARI and outputs the signal to the system microcomputer 11.

The system microcomputer 11 has RDS data from the RDS data synchronizer 10, an ARI signal from the ARI demodulator 14 and an intermediate frequency amplification detector 2 according to a program written in a ROM incorporated therein. It outputs a signal for determining the frequency division ratio to the reference oscillation / frequency division / phase comparator 12, and also outputs a control signal to the mute circuit 6. Also, the built-in RAM stores the AF list obtained from the RDS data as a table.

The reference oscillation / frequency division / phase comparator 12 and the low-pass filter 13 form a PLL loop together with the voltage-controlled oscillator in the front end 1. The signal oscillated by the voltage-controlled oscillator of the PLL loop is the reception wave. Is mixed with and the received wave is converted to the intermediate frequency.

Next, the operation of this receiver in the traffic information priority mode will be described with reference to FIG. In step S1, it is judged whether or not the RDS data of the station currently being received includes the EON (enhanced other network) group type 14A data, and if there is 14A data, the process proceeds to step S2. If there is no 14A data, the process proceeds to step S13.

In step S2, it is determined whether the currently receiving station can receive traffic information. TP = 1 in the R DS data indicates that the local station can receive traffic information. TP = 0 and T A = 1 are included in the data of group type 14A of EON (enhanced other network), and the traffic information is not broadcast at the local station, but when it is broadcast at the other station, it is expressed as R DS data. It indicates to inform. SK is a carrier of 57Khz of ARI, and BK shows that SK is AM-modulated. The presence of SK and BK indicates that the local station can receive traffic information.

Therefore, TP = 1, TP = 0 and TA = 1 or the presence of SK and BK indicates that the traffic information can be received. In that case, the process proceeds to step S3, and otherwise. In this case, the process proceeds to step S9.

In step S3, it is determined whether or not the own station is broadcasting traffic information. RDS TP = 1 and TA = 1 indicate that the local station is broadcasting traffic information, and ARI DK indicates that it is a signal that AM-modulates a carrier of 57 Khz at 125 Hz and is broadcasting traffic information. Therefore, if either TP = 1 and TA = 1 or SK and BK and DK are present, it means that the own station is broadcasting the traffic information. In that case, the process proceeds to step S19, and otherwise. Control goes to step S4.

In step S4, it is determined whether or not traffic information has been started for another network station whose information is sent to the EON RDS data. When traffic information is started by another network station, 14B type data is sent 8 times. If it is determined that there is traffic information in step S4, the process proceeds to step S5, and if it is determined that there is no traffic information, the process proceeds to step S1.

In step S5, the AF list of EON is stored, and it is determined whether or not the AF search is possible. If yes, the process proceeds to step S6, and if not, the process proceeds to step S1. In step S6, it is determined whether or not the station can be received by switching to the station in the traffic information broadcast indicated by the 14B type data obtained in step S4. If the reception is possible, the process proceeds to step S7, and if the reception is not possible, the process proceeds to step S11. In step S11, the receiving station is returned to the frequency before switching in step S6, and the process proceeds to step S1.

In step S7, when the sound of the CD player or the tape recorder is being output from the speaker as the traffic information interruption mode, the sound is switched to the sound of the radio receiver, and when the sound of the radio receiver is heard, the volume is set to a predetermined value. Up to step S8. In step S8, the process waits until the traffic information broadcast ends, and when the traffic information broadcast ends, the process proceeds to step S12. In step S12, the state before the traffic information interrupt mode is restored and the process proceeds to step S1.

In step S9, the traffic information cannot be received for the first time this time, and it is determined whether or not the beep condition is met. That is, it is only after switching from the traffic information receivable station to the traffic information unreceivable station that the judgment in step S2 is made, or the traffic information unreceivable station is switched to the traffic information priority mode during reception. It is determined whether the determination in step S2 is made. If the beep condition is satisfied, the process proceeds to step S10, and if not, the process proceeds to step S1. In step S10, after issuing a beep, the process proceeds to step S1.

In step S13, it is determined whether the current receiving station is a traffic information broadcasting station. In the RDS data, TP = 1, and in the ARI compatible station, SK and BK are displayed as the traffic information broadcasting station. If it is determined that the station is a traffic information broadcasting station, the process proceeds to step S18, and if not, the process proceeds to step S14.

In step S14, it is determined whether or not a state where it cannot be confirmed that the currently receiving station is a traffic information broadcasting station continues for 5 seconds. In RDS data, if TP = 0 and SK and BK of ARI are not present, it is not possible to confirm that the currently receiving station is a traffic information broadcasting station, and that EON data is not input in step S1. However, it is impossible to receive traffic information because other stations cannot hear the traffic information. In that case, the process proceeds to step S15, and in other cases, the process proceeds to step S13.

In step S15, the traffic information receiving station is searched while changing the frequency little by little, and it is determined whether or not the station searched in step S16 can receive the traffic information. When it is determined that the station searched in step S16 can receive the traffic information, the process proceeds to step S17, the receiving station is switched to the above station, and the process proceeds to step S1.

In step S18, it is determined whether or not the own station is broadcasting traffic information. TP = 1 and TA = 1 in RDS indicate that the local station is broadcasting traffic information, and DK in ARI is a signal that AM-modulates a carrier of 57 Khz at 125 Hz and is broadcasting traffic information. .. Therefore, if TP = 1 and TA = 1 or SK and BK and DK are present, it means that the own station is broadcasting the traffic information. In that case, the process proceeds to step S19, and if not, step The process moves to S13.

In step S19, as the traffic information interruption mode, the sound of the CD player or the tape recorder is switched to the sound of the radio receiver when playing from the speaker, and the volume is set to a predetermined value when listening to the sound of the radio receiver. Up to step S20. In step S20, the process waits until the traffic information broadcast ends, and when the traffic information broadcast ends, the process proceeds to step S21. In step S21, the state before the traffic information interrupt mode is restored and the process proceeds to step S1.

As described above, while the EON group type 14A data is being input in the traffic information priority mode, even if the currently receiving station is not the traffic information receivable station, the traffic information station search by automatic seek is not performed. , EON group type 14A data has not been input for a predetermined period of time, and only when the currently receiving station is not a traffic information receivable station, a traffic information station is searched by automatic seek.

[0041]

[Effect of the device]

 According to the receiver of the present invention, when the EON group type 14A data is input in the traffic information priority mode, the traffic information station search by the automatic seek is not performed even when the currently receiving station is not the traffic information receivable station. Therefore, the station moved by the AF search becomes a station that cannot receive the traffic information and automatically seeks, so that there is no sense of discomfort when the broadcast content changes.

Then, while receiving a station that is not EON, as in the case of the conventional one, the radio wave condition deteriorates and the traffic information cannot be heard, and automatic seeking is performed after the long distance movement to change the broadcasting network. The traffic information office of the network is searched, and it is rare to miss the traffic information.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a receiver which is an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the receiver in a traffic information priority mode.

FIG. 3 is a flowchart showing an example of an operation of a conventional receiver in a traffic information priority mode.

[Explanation of symbols]

 1 Front End 2 Intermediate Frequency Amplification Detector 3 Noise Canceller 4 Stereo Demodulator 5 Volume Controller 6 Mute Circuit 7 Power Amplifier 8 Speaker 9 RDS Data Demodulator 10 RDS Data Synchronizer 11 System Microcomputer 12 Reference Oscillation / Division / Phase Comparator 13 Low-pass filter 14 ARI demodulator

Claims (2)

[Scope of utility model registration request] 1. It is possible to receive RDS data, search for an AF station using a PI code and an AF list, and automatically switch the receiving station to a station with a good reception state. , Decode TA data and detect ARI SK, BK, DK, EON group type 1 in traffic information priority mode
While the data of 4A is being input, even if the currently receiving station is not a traffic information receivable station, the traffic information station search by automatic seek is not performed, and EON group type 14A
The RDS receiver configured to search for a traffic information station by automatic seek when the station currently receiving is not a traffic information receivable station without inputting the data of (1) for a predetermined period. 2. The RDS receiver according to claim 1, wherein the RDS receiver is configured to emit a beep when in a traffic information priority mode and a station currently receiving is not in a traffic information receivable station.