JP2923392B2 - RDS receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for receiving traffic information of an RDS receiver, and more particularly to a method for reasonably responding to undesired traffic information interrupted during a traffic information interruption permission mode.

[0002]

2. Description of the Related Art In-vehicle audio equipment is required not only to be able to easily obtain traffic information by a radio tuner provided therein, but also to have a function of comfortably enjoying a music source on a CD player or a cassette tape deck. Regarding the traffic information, RDS (Radio Data System) has been proposed and put into practical use by the European Broadcasting Union, and this RDS is a system in which various digital data are superimposed on FM radio broadcasting. (1) Program identification code (PI code) of currently received FM broadcast (2) Broadcasting station name (PS) (3) Broadcasting station frequency list (AF) broadcasting the same program (4) Program content identification code ( (PTY) (5) Broadcast state identification code (DI) (6) Music / conversation identification code (M / S code) and (7) Traffic information broadcast station identification code (TP) (8) Traffic information broadcast identification code (TA).

[0003] As described above, in the RDS, the FM
Since messages and traffic information relating to broadcasting are transmitted in a multiplex manner, an unusual special channel selection operation and traffic information reception operation become possible. For example, a traffic information receiving switch is turned on to receive a broadcast station that broadcasts traffic information (TP =
1) Even when listening to FM broadcast (TA = 0), it is identified that traffic information is being broadcast based on TA data transmitted superimposed on the FM broadcast (TA =
1) It is possible to automatically interrupt the currently listening FM broadcast and receive traffic information. In addition, even if a CD player or a cassette tape deck is being used, the traffic information reception interrupt permission switch is turned on (T.IN).
If the FO mode is turned on) and the traffic information reception interruption permission mode is set, if the traffic information is being broadcasted based on the TA data (TA = 1), the tape deck or the CD player is paused. State, temporarily switch to FM reception mode, increase the volume of radio reception, listen to traffic information, and end the broadcast of traffic information (TA =
In accordance with 0), the tape player or the CD player is operated, and the volume is reduced to restore the original state. The release of the traffic information reception interrupt can be executed when the traffic information ends, that is, when TA = 0, or when the traffic information reception interrupt is disabled (T.INFO mode off).

[0004]

As described above, the traffic information reception interrupt is very convenient and practical. However, sometimes there is a traffic information reception interrupt that is not particularly necessary, or when a CD, a tape, or the like is absorbed. When interrupting the reception of traffic information while listening to the information, there may be a case where the user wants to cancel the traffic information. As a conventional countermeasure in such a case, the traffic information reception interrupt must be prohibited. That is, it is necessary to stop the reception by turning off the traffic information reception interruption permission switch and restart the reproduction of the CD or the tape.

[0005] In such a method, the traffic information reception interruption permission mode is not operated again by operating the traffic information reception interruption permission switch, so that the subsequent traffic information reception becomes impossible. This is very troublesome, and if you forget the operation, you cannot receive the necessary traffic information, or if you enable the traffic information reception interrupt in the middle of the traffic information you do not want to hear, you do not want to hear it Regardless, a traffic information reception interrupt sometimes occurred.
In this case, the traffic information reception interrupt must be prohibited again. These issues are issues that need to be resolved.

[0006]

According to the present invention, there is provided a traffic information receiving method for an RDS receiver which demodulates RDS data transmitted superimposed on an FM broadcast and performs a predetermined operation. When unnecessary traffic information is broadcasted and received in the traffic information interruption permission mode, the reception interruption is not permitted for only this traffic information, and a means for returning to the state before interruption is provided.

[0007]

The traffic information set by operating the first operating means is provided.
Traffic information interrupt reception in the broadcast reception interrupt permission mode
If it is, the performance of the recording medium is paused, and the
While receiving traffic information,
The traffic information reception interrupt is enabled by the operation of the second operation means.
Release the pause state while maintaining the mode
Since the traffic information was restored to the state before interruption, performance
Even if traffic information is interrupted inside, skip it with simple operation
You can enjoy the performance continuously
Wear. Moreover, traffic information can always be obtained by receiving interrupts.
In the traffic information reception interrupt permission mode
Car drivers miss important traffic information
I can't.

[0008]

FIG. 1 is a block diagram of a circuit according to an embodiment of the present invention. Reference numeral 1 denotes an antenna, and reference numeral 2 denotes a front end, which tunes to a predetermined broadcasting station based on a voltage signal output from a PLL circuit described later to generate an intermediate frequency signal. An intermediate frequency amplifier 3 amplifies the intermediate frequency signal converted by the front end 2. Reference numeral 4 denotes a stereo demodulation circuit (MPX), which demodulates the intermediate frequency signal input from the intermediate frequency amplifier 3 into a stereo signal. Reference numeral 5 denotes a mute circuit, 6 denotes an amplifier, and 7 denotes a speaker, which is driven by the amplifier 6 and outputs sound.

Reference numeral 8 denotes a 57 kHz band-pass filter (B
PF), and passes a 57 kHz sub-carrier amplitude-modulated based on the RDS data. An RDS decoder / clock recovery circuit 9 demodulates RDS data from the output of the band-pass filter 8 and reproduces a clock. Reference numeral 10 denotes a group synchronization / error detection / correction circuit which detects an error of the RDS data demodulated by the RDS decoder / clock recovery circuit 9 while maintaining synchronization for each group, and corrects the error. Reference numeral 11 denotes a signal meter, which detects the reception level (reception electric field intensity) of the receiving station by monitoring the signal intensity of the intermediate frequency signal output from the intermediate frequency amplifier 3. Reference numeral 12 denotes a station detector, which is a frequency shift Δf (bandwidth) of a received signal.
And the signal strength is equal to or higher than the set level, it is determined that a receiving station exists (there is a station).

Reference numeral 13 denotes RDS data, received electric field strength Lb,
A controller having a microcomputer structure for performing automatic follow-up processing and traffic information receiving processing based on the station detect signal SD, etc., 14 is an operation unit, 15 is a display unit, and 16 is a voltage signal corresponding to reception frequency data FDT inputted from the controller 13. Is input to the front end 2 to tune to a predetermined broadcasting station. The operation unit 14 has a traffic information reception key 1 for automatically receiving traffic information.
4a and a key (T.INFO key) 14b for setting a traffic information reception interrupt permitting mode in which traffic information is interrupted even when the receiver performs another operation. still,
In addition, a CD player or a tape deck or the like is provided as audio equipment, and its operation is controlled by the controller 13, but is not shown.

Hereinafter, FIG. 1 will be described in accordance with the flowchart of FIG.
Will be described. Now, it is assumed that the RDS receiver is in the operating state, the traffic information reception key 14a of the operation unit 14 connected to the controller 13 is turned on, and is in the traffic information reception mode. In this state, the controller 1
Reference numeral 3 monitors the traffic information broadcasting station with reference to the presence or absence of TP data included in the currently received FM broadcast. Further, the controller 13 constantly monitors ON / OFF of the traffic information reception interruption permission key 14b of the operation unit 14 connected thereto (step 101), and the traffic information reception interruption permission key (T.INFO key) 14b is operated to operate the traffic. In the information reception interrupt mode, the controller 13 monitors whether TA data is transmitted from the broadcasting station (step 10).
2) If TA data is detected, it is checked whether a CD player or a tape deck is currently being played (step 103), and if it is being played, this is put into a pause state (step 104). When the performance is not being performed and when step 104 is completed, a traffic information reception interrupt from the broadcasting station is automatically permitted and received (step 10).
5).

Here, if the received traffic information content is of no interest, or if the content of the previously played CD, tape or FM broadcast has a greater necessity for continuation, The traffic information reception interruption permission key (T. INFO key) 14b is operated only for a short time within 2 seconds, for example. This state is monitored by the controller 13 (step 106). As described above, if it is a short time of 2 seconds or less, the permission to interrupt traffic information reception is temporarily stopped (step 107), and the process returns to CD performance or the like (step 10).
8). If the time is, for example, 2 seconds or more, step 1
The operation returns to the on / off monitoring state of the traffic information reception interrupt permission key (T. INFO key) 14b of No. 01.

In the above-described embodiment, the CD player or the tape deck is being played. However, it is obvious that the same operation can be obtained even while the FM broadcast is being received.

FIG. 3 is a time chart for explaining the above-mentioned operation, in which the traffic information reception interrupt permit key (T.INFO key) 14b is operated while the RDS receiver is operating with the traffic information reception key 14a turned on. If the on-time is 2 seconds or more at time A, the traffic information reception interrupt permission (T. INFO) mode is set. In this state, the CD player is in the performance mode and the traffic information transmission station (TP) = 1) If traffic information is broadcast (TA = 1) at time B during reception, the CD player enters a pause state, and the mode switches from CD to radio traffic information.
However, if this information is unnecessary and the user does not want to hear it, the traffic information is being broadcast by operating the traffic information reception interruption permission key (T. INFO key) 14b at a time point C for a short time within 2 seconds. However, returning to the CD mode again, the pause state of the CD player is released, and the reproduction can be continued.

[0015]

As described above, according to the present invention, the first
Traffic information reception interrupt permission set by operation of operation means
When traffic information is interrupted in the available mode
Pause the performance of the recording medium and receive the traffic information
And the second operating means while receiving the traffic information.
The traffic information reception interrupt permission mode is maintained by the operation of
Release the pause state and interrupt the traffic information
Because it was made to return to the state just before, for example,
Traffic information while playing your favorite music from any recording media
Can be skipped by simple operation even if
Your favorite music that is playing
It is possible to enjoy. Moreover, because of the left traffic information receiving interrupt enable mode has been set, reception of the next traffic information
Is possible and does not overlook important traffic information.
In addition, there is a great effect that the driver of the car can perform very comfortable driving.

[Brief description of the drawings]

FIG. 1 is a block diagram of a circuit according to an embodiment of the present invention.

FIG. 2 is a flowchart of the operation of one embodiment of the present invention.

FIG. 3 is a time chart of the operation of one embodiment of the present invention.

[Description of Signs] 2 Front end 3 Intermediate frequency amplifier 9 RDS decoder / clock recovery circuit 12 Station detector 13 Controller 14 Operation unit 14a Traffic information reception key 14b Traffic information reception interruption permission key (T.INFO mode key) 15 Display unit 16 PLL circuit

Claims (1)

(57) [Claims] 1. An R signal superimposed on an FM broadcast wave and transmitted.
Perform predetermined operation by demodulating DS dataFor RDS receiver
And Traffic information included in the RDS data during the performance of the recording medium
When receiving the identification code during the broadcast, the traffic information is interrupted
Set the traffic information reception interrupt permission mode for receiving
First operating means; The traffic information interruption state is returned to a state before the interruption.
Operating means, The traffic information reception set by the operation of the first operation means
Traffic information is interrupted and received in
In this case, the performance of the recording medium is paused and the traffic
Information while receiving the traffic information.
The traffic information reception interrupt permission mode is
Release the pause state while maintaining the traffic mode
Control means for returning to a state before the interruption of information.
RDS receiver characterized.