JPH03143744A - On-vehicle receiver device - Google Patents

Abstract

PURPOSE:To eliminate missing of hearing by automatically recording traffic information in a memory means so as to make this information reproduction- listenable in the point of time necessary, in the case of a vehicle which receives a broadcast signal transmitted with a data signal, for showing the traffic information during announcement, multiplexed on a main signal. CONSTITUTION:In the case of placing a traffic information broadcast in a waiting condition with a main switch turned off and a key pad operated, a switch 19 is turned on by a control circuit 12 to apply a power supply to a turner parts 5 to 8 simultaneously with a scan signal applied to a local signal transmitter 4. A radio wave, received by a receiving antenna 1, is amplifed and detected, and whether a traffic information discrimination signal or a discrimination code of a traffic information office in an ARI(traffic information) or RDS(radio data system) broadcast is obtained or not is detected by a data demodulator 11. When the detection is YES, the scan is stopped, and in the case of obtaining a message discrimination signal or an announce discrimination code, a voice signal is recorded for a memory device 9.

Description

[Detailed Description of the Invention] C. Industrial Application Field] The present invention relates to a vehicle-mounted receiving device that receives a broadcast signal in which a data signal indicating that traffic information is being announced is multiplexed with a main signal and transmitted. In particular, the present invention relates to an on-vehicle receiving device that automatically records traffic information in a memory means and allows the recorded information to be played back and listened to at any necessary time.

[Conventional technology and its problems]

Currently, in West Germany, the API system (Aut.

Fahrer Rundfunk [nforma
A traffic information system for car radios called Lion has already been put into practical use.

This API system uses the pilot tone (1
A subcarrier is added to 57KHz, which is three times the frequency of 9KHz), and this is used as a traffic information station identification signal (SK double signal) to indicate that the station broadcasts traffic information, and only when broadcasting traffic information. , this SK multiplied signal 125H
It is modulated using the z frequency signal. This 125
The Hz signal is a message identification signal (commonly called a DK double signal. Therefore, by demodulating and detecting the SK double signal at the receiver, it can be identified as a station that broadcasts traffic information. By doing so, it can be identified that the station is broadcasting traffic information.

On the other hand, in Europe, bi-phase coded data signals are converted into FSK with a phase that is 90 degrees different from the 57 KHz subcarrier in the ARE system.
(Frequency 5hift Keyin
g) Modulated and transmitted RDS (Radio Dat
a System) has been proposed and has entered the practical stage.

The data supplied in this RDS consists of four blocks each consisting of 26 bits forming one group, and part of the second block contains a traffic information station information indicating that the station broadcasts traffic information. Identification code (Tra
ffic Program Identifica
tion (commonly known as TP code) has been mistaken for one pin, and the announcement identification code (commonly known as TP code) during traffic information broadcasting has been detected.
Traffic Announcement ID
enLiricatiorj (commonly known as TA code) is also assigned an I bit.

Therefore, in the RDS receiver, by demodulating and detecting this TP code, it is possible to identify that the station is broadcasting traffic information, and by demodulating and detecting the TA code, it is possible to identify that the station is broadcasting traffic information. can be identified.

In a receiver capable of receiving ARI and RDS broadcasts as described above, by receiving and demodulating the DK double signal and TA code described above, it is possible to reproduce the broadcast signal only when traffic information is being broadcast, or For example, even when a tape deck is being played, it is possible to perform control such as switching to traffic information broadcasting preferentially.

However, in this type of traffic information broadcasting, traffic information is not always transmitted, for example, every 15 minutes or 3 minutes.
Information is sent out at regular intervals of approximately 0 minutes.

Therefore, if the user wants to listen to the traffic information immediately before starting to drive the vehicle, it is conceivable to record the information in a memory means such as an electronic memory or a tape recorder.

In this case, at least the tuner section and the memory means must be constantly supplied with operating power even when the vehicle engine is stopped, resulting in the problem of over-discharge of the vehicle battery.

[Purpose of the invention]

Therefore, it is an object of the present invention to solve the above-mentioned conventional problems, and furthermore, only traffic information is automatically recorded in the memory means, and the latest recorded information can be played back and listened to from the memory as necessary. The purpose of the present invention is to provide an in-vehicle receiving device that can perform the following functions.

(Summary of the Invention) In order to achieve the above object, the in-vehicle receiver according to the present invention includes an audio demodulation section that demodulates a main signal from a broadcast signal tuned by a front end, and an audio demodulation section that demodulates a main signal from a broadcast signal tuned by a front end. a memory means for recording an audio signal obtained from the front end; a data demodulator for demodulating the data signal from the broadcast signal tuned by the front end; and a data demodulator for indicating that traffic information is being announced by the data demodulator. When receiving a data signal, recording a demodulated audio signal in the memory means, and
A control circuit for reproducing the audio signal recorded in the memory means, and a clock means for supplying operating power at a predetermined time to the front end, the audio demodulation section, the data demodulation section, and at least a part of the memory means. It is characterized by the following.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the invention.

That is, l indicates a receiving antenna, and the RF multiplied signal from this antenna 1 is RF amplifier 2, mixer 3, and P
The signal is applied to a front end 5 consisting of a local signal oscillator 4 consisting of LL, where it is converted into an F (intermediate frequency) signal. After this IF multiplied signal is amplified by the 1F amplifier 6, it is subjected to FM detection by the FM detector 7.

The demodulated output after FM detection by this FM detector 7 is
The signal is applied to an MPX (stereo multiplex) circuit 8 and separated into left and right audio signals.

These left and right audio signals are applied to the memory end of the memory means 9 and also to the switching circuit 10.

On the other hand, the demodulated output FM-detected by the FM detector 7 is also applied to the data demodulator 11, and the data demodulator 11 demodulates the SK-multiplied signal in API broadcasting and the TP code in RDS broadcasting. Detected. This data demodulation unit 11 also outputs D when traffic information is being announced in the API system.
It detects the K times signal and also detects the TA code that is output when a traffic alert is being announced in the RDS broadcast.

The output of the data demodulating section 11 is configured to be inputted to a control circuit 12 consisting of a microprocessor, and the control circuit 12 includes a keypad 13 for performing channel selection operations, a display device 14, Timing device 15 such as a clock
is connected.

Further, from the control circuit 12, there is a tuning control line 16 for supplying a tuning control signal to the local signal oscillator 4 composed of a PLL, a memory control line 17 for supplying write or read control to the memory means 9, MPX for the switching circuit 10
A switching control line 18 for alternatively deriving the output from the circuit 8 or the memory means 9, and a switch 19 for supplying the tuner part, the control circuit 12 and the memory means 9 with electricity i+s by its on-action. A power supply control line 20 for controlling the power supply is led out.

The common terminal output of the switching circuit 10 is connected to the left and right power amplifiers 21 and 22, and the audio output power amplified by the power amplifiers is output to the output device;
L and Rout.

On the other hand, each of the above-described components is configured so that when the main switch 23 is turned on, a power source B is applied through the diode 2.1.

In the above configuration, when the main switch 23 is turned on, operating power is supplied to each section shown in FIG. 1.

Therefore, the tuner sections indicated by symbols 1 to B and 11.12 operate, and the left and right audio outputs from the M P X circuit 8 are as follows.
The signal is applied to the power amplifiers 21 and 22 via the switching circuit 10, power amplified, and output to the left and right output terminals Lout and Rout.

Then, by operating the keypad (key PC) 13 to perform the tuning change, a tuning control signal is given from the control circuit 12 to the local signal oscillator 4 consisting of a PLL via the tuning control line 16, and the desired tuning control signal is given to the local signal oscillator 4 consisting of a PLL. Broadcast signals are received and demodulated.

At this point, turn off the main switch 23 and turn off the key bat 1.
The operation when the traffic information broadcast is set to the standby state by operating 3 will be explained based on the flowchart shown in FIG.

When the key bat 13 is operated to put the traffic information broadcast into standby mode, first, the control circuit 12 generates an output to the power supply control line 20 and the switch 19 is turned on. (Step 1) By turning on the switch 19, operating power is applied to the tuner section consisting of the front end 5, IF amplifier 6, FM detector 7, MPX circuit 8, etc. A signal is applied to the local signal oscillator 4 via the local signal oscillator 4. (Step 2) Then, the control circuit 12 detects the JF level obtained from the IF amplifier 6, and when the JF level is obtained from the predetermined IF level (Step 3), the data demodulator 11 detects the API or R
It is detected whether an SK or TP code in DS broadcasting can be obtained.

If an SK or TP code is obtained (step 4), scanning is stopped (step 5) and the received frequency at that time is recorded in the control circuit 12 (step 6).
) and the switch 19 is turned off (step 7).

Through the above steps, the reception frequency at a predetermined reception level and at which traffic information is broadcast is stored in the control circuit 12.

A clock device 15 is connected to the control circuit 12, and the clock device 15 outputs a start signal every few minutes, for example. (Step 8) Upon receiving the activation signal, the control circuit 12 turns on the switch 19 (Step 9), supplies operating power to the tuner section again, and obtains the DK or TA code in API or RDS broadcasting from the data demodulator 11. Detect whether or not it is possible. (Step 10) If this DK or TA code is not obtained even after a certain period of time (step 11), the process returns to step 7 and the switch 19 is turned off.

If a DK or TA code is obtained in step 10, the control circuit 12 instructs the memory device 9 via the memory control line 17 to write the audio signal. (Step 12) As a result, the traffic information broadcast at this time is recorded in the memory device 9.

Then, the control circuit 12 puts the memory device 9 in a write state while the DK or TA code is present, and when the DK or TA code disappears (step 13), controls the switch 12 to turn off again. (Step 14) In this case, as shown by the broken line, if an operation routine is created that returns from step 14 to step 8, the next traffic information to be broadcast will be overwritten in the memory device 9. New traffic information is always written in the memory device 9.

As described above, only traffic information is automatically written into the memory device 9 even if no passenger is present.

Therefore, when the vehicle is to be driven, or when the power switch 23 is turned on and the key bat 13 is operated as necessary, the control circuit 12 transfers the readout output from the memory device 9 to the power amplifier 21 via the switching control line 18.
．． 22, and at the same time controls the memory device 9 to read mode via the memory control line 17.

In the example described above, a scan signal is applied to the local signal oscillator 4 in step 2, and when a predetermined IF level and SK or TP code are obtained, the received frequency is stored. That's what I do.

However, in many cases, the broadcast received before leaving the vehicle is a station that broadcasts traffic information (in this case,
There is no need to scan again as in step 2, and the broadcast frequency just before the receiver's power is cut off is memorized (
last one) and use this frequency.

As a result, the passenger can listen to the traffic information written in the memory device 9.

The above explanation takes as an example the case where an integrated electronic memory is used as the memory device, but what are the restrictions when using a tape recorder as the memory device? A part of the 111 routine is shown in FIG.

In FIG. 3, the steps from step 10 to step 14 in FIG. 2 have been rewritten assuming that a tape recorder is used.

That is, when a DK or TA code is obtained (step 10), the control circuit 12 controls the tape recorder to enter the recording (Rec) state. (Step 15) As a result, the traffic information broadcast at this time is recorded on the tape recorder.

and the control '+1[1 circuit 12 holds the tape recorder in the recording state while the DK or TA code is present;
Alternatively, if the TA code disappears (step 16), the recording state of the tape recorder is stopped and the tape is rewound (Rew) control n to the start part.

(Step 17) When it is detected that the tape has been rewound to the start position (Step 18), the switch 19 is controlled to be in the OFF state. (Step 14) Therefore, when the tape recorder is put into the playback mode, the traffic information is immediately played back.

At this time, as in the case of Figure 2, if you create an operation routine that returns from step 14 to step 8 as shown by the broken line, the traffic information to be broadcast next time will be overwritten on the tape. The latest traffic information can always be played back from the tape recorder.

In the state of step 10 in FIGS. 2 and 3, the control circuit 12 receives the current time information from the clock device 15, converts it into audio, and records it in the beginning part of the electronic memory device or tape recorder. If you do so, you can check the current broadcast time as well as the content of the traffic information.

Further, the time information at that time may be recorded in the control circuit 12, and the time information may be converted into a display and displayed on the display 14 when the memory device or tape recorder reproduces the data.

Further, although the above example shows the case where an electronic memory and a tape recorder are used as the memory means, it is also possible to use a DAT or a VTR as the memory means.

In the above example, DT or T
A is detected, but traffic information is normally broadcast every 30 minutes. However, in cases such as when an accident or traffic jam occurs, the broadcast may be broadcast every five minutes, for example. Therefore, it is preferable that the activation signal output in step 8 be configured so that it can be manually set so that it can be generated at arbitrary time intervals.

〔effect〕

As is clear from the above description, according to the present invention, even if no passenger is present, only traffic information can be automatically recorded in the memory means. Therefore, when the passenger is about to start driving the vehicle, he or she can immediately obtain the latest traffic information.

Moreover, since this recording operation is performed intermittently using a timekeeping means such as a clock, it is possible to prevent inconveniences such as over-discharging of the battery of the vehicle.

[Brief explanation of the drawing]

FIG. 1 is a brochure showing an embodiment of the invention, FIG. 2 is a flowchart for explaining the invention in detail, and FIG. 3 is a flowchart for explaining the operation of another embodiment of the invention. . ■...Antenna, 2...RF amplifier, 3...Mixer 4...Local signal oscillator, 5...Front end, 6...IF amplifier, 7...FM detector, 8...
...MPX circuit, 9...memory device, IO...
Switching circuit, 11... Data demodulation section, 12... Control circuit, 13... Key band, 14... Display device, 1
5... Time measuring means, 19... Switch, 21.22.
...Power amplifier, 23...Main switch.

Claims (3)

[Claims] (1) A receiver that receives a broadcast signal that multiplexes and transmits a data signal indicating that traffic information is being announced on a main signal, and includes a front end that receives the broadcast signal, and a front end that transmits a data signal that indicates that traffic information is being announced. an audio demodulation unit that demodulates the main signal from the tuned broadcast signal; a memory means in which the audio signal obtained from the audio demodulation unit is recorded; and a data signal that demodulates the data signal from the broadcast signal tuned by the front end. a data demodulation section; upon receiving a data signal indicating that traffic information is being announced from the data demodulation section, records a demodulated audio signal in the memory means, and records the demodulated audio signal in the memory means; It is characterized by comprising a control circuit for reproducing a signal, and a timing means for supplying operating power to at least a part of the front end, the audio demodulating section, the data demodulating section, and the memory means at a predetermined time. In-vehicle receiver. (2) A receiver that receives a broadcast signal that multiplexes a data signal indicating that traffic information is being announced on a main signal and sends it out, the receiver comprising: a front end that receives the broadcast signal; an audio demodulation unit that demodulates the main signal from the tuned broadcast signal; a memory means in which the audio signal obtained from the audio demodulation unit is recorded; and a data signal that demodulates the data signal from the broadcast signal tuned by the front end. a data demodulation section; upon receiving a data signal indicating that traffic information is being announced from the data demodulation section, records a demodulated audio signal in the memory means, and records the demodulated audio signal in the memory means; A control circuit for reproducing a signal, and a timer for supplying operating power to at least a part of the front end, the audio demodulator, the data demodulator, and the memory means at a predetermined time, the timer The demodulated audio signal is overwritten in the memory means each time an operating power is supplied by the controller and a data signal indicating that traffic information is being announced is received from the data demodulator. In-vehicle receiver. (3) A receiver that receives a broadcast signal that multiplexes a data signal indicating that traffic information is being announced on a main signal and sends it out, the receiver comprising: a front end that receives the broadcast signal; an audio demodulation unit that demodulates the main signal from the tuned broadcast signal; a memory means in which the audio signal obtained from the audio demodulation unit is recorded; and a data signal that demodulates the data signal from the broadcast signal tuned by the front end. a data demodulation section; upon receiving a data signal indicating that traffic information is being announced from the data demodulation section, records a demodulated audio signal in the memory means, and records the demodulated audio signal in the memory means; a control circuit for reproducing a signal; a timing means for supplying operating power to at least a part of the front end, the audio demodulating section, the data demodulating section and the memory means at a predetermined time; 1. A vehicle-mounted receiving device comprising: time information reproducing means for reproducing time information on which a signal is recorded at the same time as the time information is reproduced from the memory means.