JPH05344012A - Traffic information reception method for rds receiver - Google Patents

Abstract

PURPOSE:To restore the mode to a state before interruption by skipping only traffic information without releasing the automatic reception mode when interruption of reception of the traffic information takes place and the information is not desired for listening in the RDS receiver receiving automatically a station broadcasting the traffic information. CONSTITUTION:When a traffic information reception interrupt enable key 14b of an operation section 14 used to operate a controller 13 controlling an RDS receiver is set to the traffic information reception interrupt enable mode and interrupt of undesired reception of traffic information takes place, the mode is tentatively set to the traffic information reception interrupt disable mode by operating the traffic information reception interrupt enable key 14b in a short time, e.g. 2 seconds or below to set the mode to a state before the interrupt such as CD player reproduction, but since the mode is left set to the traffic information reception interrupt enable mode for a long term, a succeeding traffic information reception interrupt is executed and norequired traffic information is missed.

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 rational method for handling an undesired traffic information interruption during a traffic information interruption permission mode.

[0002]

2. Description of the Related Art In-vehicle audio equipment is required to have a function of comfortably enjoying a music source with a CD player, a cassette tape deck or the like, in addition to easily obtaining traffic information by a radio tuner provided therein. Regarding the traffic information, an RDS (Radio Data System) has been proposed and put into practical use by the European Broadcasting Union, and this RDS is a method of superimposing various digital data on an FM radio broadcast, and as a message. (1) Program identification code (PI code) (2) Broadcasting station name (PS) (3) Broadcasting station frequency list (AF) currently broadcasting the same program (4) Program content identification code ( PTY) (5) Broadcast status identification code (DI) (6) Music / conversation identification code (M / S code) and (7) Traffic information broadcasting station identification code (TP) (8) Identification code during traffic information broadcasting (TA) etc.

Thus, the FM received by the RDS is
Since broadcast messages and traffic information are multiplexed, it is possible to perform exceptional tuning and traffic information reception operations that have never been seen before. For example, the traffic information receiving switch is turned on to receive a broadcasting station that broadcasts traffic information (TP =
1) Even if the user is listening to the FM broadcast (TA = 0), it is identified that the traffic information is being broadcast based on the TA data sent superimposed on the FM broadcast (TA =
1) It is possible to automatically interrupt the FM broadcast currently being listened to and receive traffic information. In addition, the traffic information reception interrupt enable switch is turned on (T.IN) even while playing using a CD player or cassette tape deck.
If the traffic information reception interruption permission mode is set by turning on the FO mode (ON), and if the traffic information is identified on the basis of TA data (TA = 1), the tape deck or the CD player is paused. Then, temporarily switch to FM reception mode, turn up the volume of radio reception to listen to traffic information, and finish broadcasting the traffic information (TA =
With 0), the tape player or the CD player can be operated and the volume can be reduced to restore the original state. The cancellation of the traffic information reception interrupt can be executed when the traffic information ends, that is, 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, but sometimes there is a traffic information reception interrupt that is not particularly necessary, or the CD, tape, etc. are hot. For the traffic information reception interruption during listening, it may be desired to cancel this traffic information. In such a case, the conventional countermeasure is to prohibit the traffic information reception interrupt. That is, it is necessary to turn off the traffic information reception interrupt permission switch to stop the reception, and then restart the reproduction of the CD or the tape.

In such a method, thereafter, unless the traffic information reception interrupt permission switch is again operated to enter the traffic information reception interruption permission mode, the subsequent traffic information cannot be received. This is very troublesome, and if you forget the operation, you may not be able to receive the necessary traffic information, or if you allow 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 problems 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 sent superimposed on an FM broadcast and performs a predetermined operation. When unnecessary traffic information is broadcast and received in the traffic information interruption permission mode, only this traffic information is set as a reception interruption non-permission, and a means for returning to the state before interruption is achieved.

[0007]

When unnecessary traffic information is broadcast and received during the traffic information interrupt enable mode, the traffic information reception interrupt enable key is operated for a short time so that only this traffic information is disabled for reception interrupt, Return to the state. This operation does not release the traffic information reception interrupt enable mode, but operates so that the traffic information reception interrupt enable mode continues, so that only the traffic information that you do not want to hear can be skipped by this operation. If you enjoy music, you can continue to enjoy it. Moreover, the driver of the car can drive comfortably without missing the next traffic information.

[0008]

1 is a block diagram of a circuit of an embodiment of the present invention. Reference numeral 1 is an antenna, and 2 is 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 is a mute circuit, 6 is an amplifier, and 7 is a speaker, which is driven by the amplifier 6 and outputs sound.

8 is a 57 kHz band pass filter (B
PF), which passes a 57 kHz subcarrier whose amplitude is modulated based on RDS data. An RDS decoder / clock recovery circuit 9 demodulates RDS data from the output of the bandpass filter 8 and recovers a clock. A group synchronization / error detection / correction circuit 10 detects an error in the RDS data demodulated by the RDS decoder / clock recovery circuit 9 while synchronizing for each group and corrects the error. A signal meter 11 detects the reception level (reception electric field strength) of the receiving station by monitoring the signal strength of the intermediate frequency signal output from the intermediate frequency amplifier 3. 12 is a station detector, which is the frequency deviation Δf (bandwidth) of the received signal
When the signal strength is within the range of (1) and the signal strength is equal to or higher than the set level, it is determined that the receiving station exists (station exists).

Reference numeral 13 denotes RDS data, received electric field strength Lb,
A controller having a microcomputer structure for performing automatic tracking processing and traffic information reception processing based on the station detect signal SD, 14 is an operation unit, 15 is a display unit, 16 is a voltage signal corresponding to the reception frequency data FDT input from the controller 13. Is a PLL circuit for inputting to the front end 2 to tune to a predetermined broadcasting station. The operation unit 14 includes a traffic information reception key 1 for automatically receiving traffic information.
There is provided a key (T.INFO key) 14b for setting a traffic information reception interrupt permission mode in which traffic information is interrupted even if the receiver 4a and the receiver perform another operation. still,
In addition to this, a CD player, a tape deck, or the like is provided as an audio device, and its operation is controlled by the controller 13, but the illustration thereof is omitted.

Hereinafter, according to the flow chart of FIG.
The operation of 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 such a state, the controller 1
Reference numeral 3 monitors the traffic information broadcasting station by referring to the presence / absence of TP data included in the currently received FM broadcast. Further, the controller 13 constantly monitors ON / OFF of the traffic information reception interrupt permission key 14b of the operation unit 14 connected to it (step 101), and the traffic information reception interrupt permission key (T.INFO key) 14b is operated to control the traffic. In the information reception interrupt mode, the controller 13 monitors whether TA data is sent from the broadcasting station (step 10
2) When the TA data is detected, it is checked whether the CD player or the tape deck is currently playing (step 103), and if it is playing, this is put into a pause state (step 104). When not playing and when step 104 is completed, the traffic information reception interrupt from the broadcasting station is automatically permitted and received (step 10).
5).

Here, if the received traffic information content is not of interest, or if the content of the previously played CD, tape or FM broadcast is more necessary to continue. The traffic information reception interruption permission key (T.INFO key) 14b is operated for a short time, for example, within 2 seconds. This state is monitored by the controller 13 (step 106), and if it is a short time of 2 seconds or less as described above, the traffic information reception interruption permission is temporarily stopped (step 107) and the CD performance or the like is returned (step 10).
8). If the time is, for example, 2 seconds or more, step 1
Return to the ON / OFF monitoring state of the traffic information reception interrupt permission key (T.INFO key) 14b of 01.

In the above embodiment, the CD player or the tape deck is playing, but it is clear that the same operation can be achieved even during the reception of the FM broadcast.

3 is a time chart for explaining the above-mentioned operation. While the RDS receiver is operating with the traffic information reception key 14a turned on, the traffic information reception interrupt enable key (T.INFO key) 14b is operated. If the ON time is 2 seconds or more as at the time point A, the traffic information reception interrupt permission (T.INFO) mode is set, and in that state, the CD player is set to the performance mode, and the traffic information transmission station (TP = 1) If the traffic information is broadcast (TA = 1) at time B during reception, the CD player enters the pause state, and the mode is switched from the CD to the traffic information on the radio.
However, if this information is unnecessary and you do not want to hear it, by operating the traffic information reception interrupt permission key (T.INFO key) 14b for a short time within 2 seconds at time C, the traffic information is being broadcast. Also, it returns to the CD mode again, the paused state of the CD player is released, and the reproduction can be continued.

[0015]

As described above, according to the present invention, in the traffic information receiving method of the RDS receiver which demodulates the RDS data sent superimposed on the FM broadcast and performs a predetermined operation, the traffic information interrupt When unnecessary traffic information is broadcast and received in the permit mode, the traffic information reception interrupt enable key is used to disable only this traffic information for reception interrupt, and it is configured to return to the state before interruption. You can skip traffic information that is not available with a simple operation, and if you enjoy music, you can continue to enjoy it.
Moreover, since the traffic information reception interruption permission mode is still set, it is a great effect that the driver of the automobile can drive very comfortably without missing the next traffic information.

[Brief description of drawings]

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

[Explanation of symbols]

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 interrupt enable key (T.INFO mode key) 15 display unit 16 PLL circuit

Claims (1)

[Claims] 1. RD superposed on FM broadcast and transmitted
In the traffic information receiving method of an RDS receiver that demodulates S data and performs a predetermined operation, a key for switching between traffic information reception interrupt enable and disable modes is provided, and unnecessary traffic information is broadcast during the traffic information interrupt enable mode. If received, the traffic information receiving method of the RDS receiver is characterized in that only the traffic information is disallowed for interruption and means for returning to the state before interruption is provided.