KR950003463B1 - Traffic information receiver and receiving method - Google Patents

Abstract

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Description

Traffic information receiver and receiving method

1 is a system configuration diagram of a conventional traffic information receiving apparatus.

2 is a system configuration diagram of the traffic information receiving apparatus of the present invention.

3 is a control signal flow diagram for explaining the operation of FIG.

* Explanation of symbols for main parts of the drawings

1: FM tuner 2: Intermediate frequency detector

3: multiplexer unit 4: signal detection unit for displaying traffic information broadcasting station

5: Signal selector 6: Micom

The present invention relates to the reception of traffic information of car audio, and in particular, to make a detector that detects traffic information broadcasting in a single chip and to utilize the free space according to the minimization of peripheral circuits, and to improve the competitiveness of the product. The present invention relates to a traffic information receiving apparatus and a receiving method.

As shown in FIG. 1, the conventional traffic information receiver includes an FM tuner 20 that receives and tunes a frequency-modulated high frequency signal through an antenna ANT and a tuned by the FM tuner 20. FIG. The intermediate frequency detector 30 detects, demodulates, and amplifies and outputs the intermediate frequency signal by mixing the high frequency signal with the local oscillation frequency, and receives the intermediate frequency signal output from the intermediate frequency detector 30 into a stereo signal. Traffic information broadcasting station display signal detecting unit 50 for detecting a 57K _HZ component pilot signal SK, which is a 57K _HZ component, from the multiplexer unit 40 and the intermediate frequency signal demodulated by the intermediate frequency detecting unit 30. And detecting the signal DK during the traffic information broadcasting of 125H _Z component from the pilot signal SK for displaying the traffic information broadcasting station and outputting the tape and the output signal of the multiplexer unit 40 according to the presence or absence of the signal DK. 100, Traffic information broadcasting station display pilot output from the traffic information broadcasting signal detection unit 60 and the traffic information broadcasting station display signal detection unit 50 for selectively outputting the output signal of the fact disc 110 and the digital tape recorder 120. The microcomputer 70 for controlling the overall operation of the FM tuner 20 and the system according to the presence or absence of the signal SK, and the signal detection unit 60 during the traffic information broadcasting according to the control signal output from the microcomputer 70. Amplification unit 80 for amplifying the signal selected at the predetermined level and outputting to the speaker 90, and a display unit 130 for displaying the time and various modes according to the output signal of the microcomputer 70 have.

In the conventional traffic information receiver configured as described above, even when the listener is listening to the tape 100, the compact disc 110, and the digital tape recorder 120, the traffic information broadcast signal is transmitted from the broadcasting station to the radio. It is to be converted.

That is, when a frequency modulated high frequency signal is received through the antenna ANT, the FM tuner 20 tunes the received high frequency signal to the intermediate frequency detector 30, and the intermediate frequency detector 30 is an FM tuner. The high frequency signal tuned at 20 is mixed with the local oscillation frequency to detect the intermediate frequency signal, demodulate and amplify it, and input the same to the multiplexer 40 and the signal detection unit 50 for displaying a traffic information broadcasting station.

The traffic information broadcasting station display signal detector 50 detects a pilot signal SK for traffic information broadcasting station display, which is a 57K _HZ component, by filtering the intermediate frequency signal demodulated and output from the intermediate frequency detector 30. The 57K _HZ signal is carried on the intermediate frequency signal output from the intermediate frequency detection unit 30. The 57K _HZ signal is input to the microcomputer 70 to recognize the presence or absence of the pilot signal SK for traffic information broadcasting station display. _If the signal DK, which is the amplitude modulated 125H _Z component, is loaded on the _HZ , the signal is recognized as being currently being broadcast by a broadcasting station, demodulated, and input to the signal detection unit 60 during the traffic information broadcasting.

The signal detection unit 60 during the traffic information broadcasting has a phase synchronous loop detector capable of recognizing 125H _Z and an analog switch for controlling the signal by recognizing the signal. When a signal during the traffic information broadcasting, which is a 125H _Z component, is detected, the signal detecting unit 60 during the traffic information broadcasting is set to the tape 100, the compact disc 110, or the digital tape recorder 120 so that its output signal is Even if it is being output to the speaker 90, it is cut off and switched to the FM mode, that is, the traffic information broadcast signal output from the multiplexer 40 is selected and amplified to a predetermined level through the amplification unit 80, and then to the speaker 90. Will print.

Thereafter, when the traffic information broadcasting ends, that is, when the signal DK during the traffic information broadcasting of 125H _Z is not detected, the signal detection unit 60 during the traffic information broadcasting is selected by the tape 100, the compact disk 110, or the digital tape recorder selected by the listener. The output signal of 120 is selected and output to the speaker 90.

If the listener is listening to the FM mode before the traffic information broadcast, there is no mode change as described above and the traffic broadcast is listened as it is.

In addition, the microcomputer 70 controls each part according to the presence or absence of the pilot signal SK for displaying the traffic information broadcasting station from the signal detecting unit 50 for displaying the traffic information broadcasting station, and the tape 100 and the compact in FM mode. When the disc 110 or the digital tape recorder 120 converts to or vice versa, an appropriate time display is displayed on the display 130.

However, such a conventional traffic information receiving apparatus has a phase synchronous loop circuit built in a signal detection unit during a traffic information broadcast, and the phase synchronous loop circuit basically generates a voltage controlled oscillator for generating 125H _Z and the voltage controlled oscillator. Phase detector and various timers for comparing the frequency divided by the divided frequency with the phase of the input signal and accurately adjusting the output frequency (125H _Z ) of the voltage controlled oscillator according to the phase error. Since many parts are built by the purified water, not only it takes up a lot of limited space but also has a problem in that economic efficiency and reliability workability are deteriorated due to the high cost burden of the components of the phase-locked loop circuit.

Accordingly, an object of the present invention is to provide a single-chip signal detection unit for switching between the FM mode and the output signal of a tape, compact disc or digital tape recorder, so that traffic information can be automatically listened to when the signal is detected. To provide a traffic information receiving device and a receiving method to improve the competitiveness of the product, and to make use of the free space according to the minimization of the peripheral circuit.

In order to achieve the above object, the present invention detects a pilot signal (SK) for displaying a traffic information broadcasting station from an intermediate frequency signal detected by an intermediate frequency detector, and detects traffic information from the detected pilot signal (SK) for displaying a traffic information broadcasting station. Traffic information station display signal detection unit for detecting and outputting a signal DK in broadcasting and traffic information station display pilot signal SK outputted from the traffic information station display signal detection unit, presence and absence, and The microcomputer controls the entire system operation of the traffic information receiving apparatus according to the presence or absence of the signal DK, and is switched according to the output control signal of the microcomputer to control the FM mode signal of the multiplexer and the tape, compact disc or digital tape recorder. It is composed of a signal selector which outputs to a speaker by selecting an output signal.

In addition, the reception method according to the present invention checks the traffic broadcasting mode and checks the presence or absence of a pilot signal (SK) for displaying a traffic information broadcasting station and a signal (DK) during a traffic information broadcasting in the broadcasting mode, and displays the traffic information broadcasting station. The pilot signal SK is a signal signal and if the signal DK during traffic information broadcasting is no signal, the listener maintains the setting mode. If both signals are signalless, the pilot signal is checked for a predetermined time. Checking the set mode; muting the current output and generating a warning sound when the no signal elapses for a predetermined time in the second step; searching for a traffic information broadcasting station; and present mode when the two signals are in the second step. Is in the FM mode, the traffic information broadcast is output.

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

2 is a system configuration diagram of a traffic information receiving apparatus according to the present invention. As shown therein, an FM tuner 1 for receiving and tuning a frequency-modulated high frequency signal through an antenna ANT and the FM tuner 1 is shown. The intermediate frequency detector 2 detects, demodulates, and amplifies and outputs the intermediate frequency signal by mixing the tuned high frequency signal with the local oscillation frequency, and receives the stereo frequency signal output from the intermediate frequency detector 2. Detects a pilot signal SK for traffic information broadcasting station display, which is a 56K _HZ component, from the multiplexer section 3 separated from the intermediate frequency detector 2 and the intermediate frequency signal demodulated by the intermediate frequency detector 2, and displays the detected traffic information broadcasting station. Is output from the traffic information broadcasting station display signal detecting unit 4 which detects and outputs the signal DK during traffic information broadcasting from the pilot signal SK for use, and the signal detection unit 4 displaying the traffic information broadcasting station display. Signal detection unit (4) and FM tuner (1) for displaying traffic information stations according to whether the pilot signal (SK) for displaying a general information broadcasting station and the signal (DK) during traffic information broadcasting are present or not and the traffic information receiving selection key (SDK). And a microcomputer 6 for controlling the overall system operation of the traffic information receiving apparatus, and switching according to the output control signal of the microcomputer 6 to output signals of the multiplexer unit 3, the tape 9, and the compact disc 10. ), The signal selector 5 for selectively outputting the output signal of the digital tape recorder 11 and the signal selected by the signal selector 5 according to the control signal of the microcomputer 6 are amplified to a predetermined level. The amplifier 8 outputs to the speaker 8, and the display unit 12 for displaying the time and various modes in accordance with the output signal of the microcomputer (6).

The operation and effects of the present invention configured as described above will be described in detail with reference to FIG.

When the frequency modulated high frequency signal is received through the antenna ANT, the FM tuner 1 tunes the received high frequency signal to the intermediate frequency detector 2, and the intermediate frequency detector 2 receives the FM tuner 1 The high frequency signal tuned at < RTI ID = 0.0 >) < / RTI > is mixed with the local oscillation frequency to detect the intermediate frequency signal, demodulate and amplify it, and input it to the multiplexer unit 3 and the signal detector 4 for displaying the traffic information broadcasting station.

The traffic information station signal detector (4) for display there is to detect the intermediate-frequency detector (2) of traffic information station pilot signal (SK) for display by the demodulation filter the intermediate frequency signal outputted 57K _HZ components in, where the If the 57K _HZ signal is included in the intermediate frequency signal output from the intermediate frequency detection unit 2, it is a traffic information broadcasting station, and the recognition signal for the presence or absence of the pilot signal SK is input to the microcomputer 6, and If 57K _HZ contains the signal DK during the traffic information broadcasting, which is the amplitude modulated 125H _Z component, is currently being broadcast by the broadcasting station, and the presence or absence thereof is detected and inputted to the microcomputer 6.

At this time, the micom 6 scans the traffic information reception selection key (SDK) and if the traffic information mode is not set, that is, if the traffic condition reception selection key (SDK) is off, the signal detection unit for displaying the traffic information broadcasting station (4). The current mode is FM mode, tape (9), compact disc (10) or digital tape regardless of whether or not the pilot signal (SK) for displaying traffic information stations and the signal (DK) during traffic information broadcasting are input from If the recorder 11 is set, the set mode is output to the speaker 8 by controlling the signal selector 5, and if the traffic information receiving selection key SDK is set to the traffic information receiving mode, It will do the same thing.

That is, when the traffic information broadcast reception mode is set, the above-mentioned microcomputer 6 outputs the traffic signal of the traffic information station display signal SK from the signal detection unit 4 for displaying the traffic information station and the signal of the traffic information broadcasting DK. If only the pilot signal SK for displaying the traffic information broadcasting station is detected and no signal DK during the traffic information broadcasting is detected, it is determined that the broadcasting station is not currently broadcasting and the signal selector 5 is controlled. To maintain the normal mode selected by the user.

The above description of the normal mode is listed in detail.

First, when not in the SK reception mode (not selected), the listener is listening to the selected mode (tape 9, CD 10 digital tape recorder 11, multiplexer section 3, etc.) as it is.

Second, in the SK reception mode

1) SK recognition, DK (125HZ) recognition

The listener is listening to the selected mode.

2) In case of SK recognition and DK recognition

The listener is listening to the FM (multiplexer 3) regardless of the mode selected.

In this case, traffic is being broadcast.

3) SK recognition and DK recognition

It is not the normal mode as the third step,

It has a transition process of delay circuit → muting → warning sound generation → start searching for SK stations.

Even when the traffic information broadcasting reception mode is set above, if the pilot signal SK for displaying the traffic information station and the signal DK during the traffic information broadcasting are not detected, the signal is checked for a predetermined time through the delay circuit and amplified. If the mute is controlled and muted and input continuously without a signal until a predetermined time elapses, a warning sound is generated to the speaker 8.

This warning sound is a warning to search for a traffic information station, and if it rings several times, it automatically controls the FM tuner 1 to tune to the frequency of the traffic station.

When the traffic information broadcasting reception mode is selected, both the traffic information broadcasting station display pilot signal SK and the traffic information broadcasting signal DK are detected from the traffic information broadcasting station display signal detection unit 50, which is 57 KH _Z. The microcomputer 6 checks the current mode selected by the listener. If the current mode is selected as the tape 9, the compact disc 10 or the digital tape recorder 11, the microcomputer 6 controls the signal selection unit 5 to control the signal. Blocks the output signals of the tape 9, the compact disc 10 and the digital tape recorder 11, switches to the FM mode, that is, switches to the multiplexer section 3, and amplifies the traffic information broadcast signal output therefrom. 7) After amplifying to a certain level through the speaker 8, and outputs to the speaker (8), if the checked mode is FM mode, the traffic output from the multiplexer (3) immediately without controlling the signal selector (5) Information room The transmission call is output to the speaker 8 through the amplifier 7.

Thereafter, when the traffic information broadcasting ends, that is, when the signal DK during the traffic information broadcasting is not detected, the microcomputer 6 selects the output signal of the tape 9, the compact disk 10, or the digital tape recorder 11 selected by the listener. To be output to the speaker 8.

The microcomputer 6 also displays a suitable time display on the display unit 12 when converting to the tape 9, the compact disc 10, or the digital tape recorder 11 in the FM mode or vice versa.

As described above, according to the present invention, due to the simplification of the circuit configuration, it is suitable for a car stereo having a small amount of free space, and there is no adjustment of peripheral control and peripheral components and respective integrated circuits, which are not found in the current traffic information receiver. The cost can be drastically reduced by eliminating the signal detection part during the traffic information broadcasting, which is supplied by the manufacturing company, and it is effective to completely solve the reliability problem due to the adjustment and error of their parts.

Claims (2)

A traffic information broadcasting station which detects a pilot signal SK for displaying the traffic information broadcasting station from the received intermediate frequency signal and detects and outputs a signal DK during traffic information broadcasting from the detected traffic information broadcasting station displaying pilot signal SK. Traffic according to whether or not the display signal detection unit 4 and the traffic information broadcasting station display pilot signal SK output from the traffic information broadcasting station display signal detection unit are present and whether or not the signal DK during traffic information broadcasting is present. The microcomputer 6 for controlling the overall operation of the information receiving apparatus and the output control signal of the microcomputer 6 are switched and switched to select the FM mode signal of the multiplexer unit and an output signal other than the FM mode, and output the signal to the speaker. Traffic information receiving apparatus comprising a selection unit (5). Checking the traffic broadcasting reception mode and checking the presence or absence of a pilot signal SK for displaying a traffic information station and the presence or absence of a signal DK during a traffic information broadcasting, and the pilot signal SK for displaying a traffic information broadcasting station If the signal (DK) during the traffic signal broadcasting is a no signal and the signal is no signal, the listener maintains the setting mode. If the two signals are no signal, the listener checks the non-signal for a predetermined time. Muting the current output, generating a warning sound, and searching for a traffic information broadcasting station when the no signal has elapsed for a predetermined time; and outputting a traffic information broadcasting if the current mode is an FM mode when the two signals are a signal. If the traffic information receiving method comprising the step of switching to the FM mode.

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