KR100289960B1 - Traffic Information Receiving Method Using RDS Data - Google Patents

Abstract

Disclosed is a traffic information receiving method using RDS data. Receives and outputs an FM radio signal including RDS data, and checks the on / off of the traffic broadcasting reception mode. When the traffic broadcasting reception mode is on, the data during the traffic announcement broadcasting is checked by checking the on / off of the data during the traffic announcement broadcasting. If is off, the output FM radio station continues to be output. If the data is on during traffic announcements, the output FM radio station ends and the traffic information station is output. Then, it is checked whether the output time of traffic information broadcasting has elapsed a predetermined time, and when the predetermined time has elapsed, the FM radio broadcast originally listened is output. If the predetermined time has not elapsed, the data during traffic information broadcasting is checked. If the data is off during the traffic announcement broadcast FM radio broadcasting, and if the data during the traffic announcement broadcast traffic information broadcasting. As a result, even when the vehicle passes through the weak field level of the received signal or the data error area while receiving the traffic information broadcast, the traffic information broadcast can be faithfully received for a predetermined time.

Description

Traffic Information Receiving Method Using RDS Data

The present invention relates to a traffic information receiving method using RDS data, and more particularly, to a traffic information receiving method using RDS data capable of faithfully receiving traffic information broadcasting using RDS data.

The subcarrier is used for FM broadcasting to transmit multiple control codes or digital data. The frequency of the subcarrier in the spectral margin of the existing FM broadcasting (50 to 100 Hz) is three times (57 Hz) or four times the pilot frequency (19 Hz). (㎑) A method of providing multiple services such as automatic tuning, broadcasting station name, traffic information, text broadcasting, time information, and wireless calling by digitally multiplexing more than 16 codes with PSK equilibrium modulation is called RDS (Radio Data System). .

RDS was developed on the basis of the German ARI (Autofahrer rundfunk information) and Sweden's PI (programme identification / public information) system for the purpose of selective reception of traffic information broadcasting.

In Europe, many broadcasters often make up networks and broadcast the same program.In this way, they select and receive the best radio wave reception from a large number of stations (optimal reception function), or drive in remote areas by car. When receiving an FM radio signal, a function that automatically tunes into a station with a stronger electric field than when the electric field drops in some regions (automatic tracking function) is used to list AF (List of alternative frequencies) and PI (Program identification) signals. The AF signal is stored in a memory when the broadcast signal is received by a frequency list of a broadcasting station broadcasting the same program. Automatically selects broadcasting stations with a certain electric field strength from among the AF signals.

The PI signal confirms whether or not the received pro is the same program by comparing with the PI signal stored in the memory and displays the name of the broadcasting station currently being received by the PS (Program service name) signal.

1 is a view showing a traffic information receiving method using conventional RDS data.

As shown in FIG. 1, in the conventional traffic information receiving method using RDS data, when power is applied to a vehicle audio device (step S11), an FM radio signal including an RDS signal is received to output an FM radio broadcast. (Step S12) Then, it is checked whether the RDS reception mode button for receiving traffic information and the like is set on (step S13).

When the RDS reception mode button is set to on in step S13, it is checked whether the TP data is 1 and the TA data is 1 from the data of the 14B group of the RDS signal received together with the FM radio signal (step S14). . In this case, when the TP data is 1 and the TA data is 0, the TP data is fed back to the step to continuously output a radio broadcast.

If the TP data is 1 and TA data is 1 in step S14, the output radio broadcast is stopped (step S15), and the traffic information broadcast is switched to output traffic information broadcast (step S16).

If the TA data is checked and 1 is continuously output, the traffic information broadcast is fed back to the step S16, and if 0 is output, the radio broadcast originally fed back is outputted to the step S12 (step S17). ).

However, in the conventional traffic information receiving method using RDS data, when the TA signal of the 14B group is turned off, the radio signal is returned to the original radio station which was being output before the traffic information broadcast was received. For example, when RDS data is not received in a region receiving a weak electric field level FM signal or a data error region, traffic information is regarded as off, and there is a problem of returning to the original broadcast.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to faithfully receive traffic information broadcasting in weak field level or data error area when jumping from RDS FM radio broadcasting to other broadcasting. The purpose of the present invention is to provide a traffic information receiving method using RDS data.

1 is a view showing a traffic information receiving method using conventional RDS data;

2 is a block diagram of a traffic information receiving apparatus using RDS data according to the present invention; And

3 is a flowchart illustrating a traffic information receiving method using RDS data according to the present invention.

<Explanation of symbols for main parts of drawing>

100: FM receiver 110: antenna

120: tuner portion 122: RF amplifier

124: local oscillator 126: mixer

130: IF amplifier 140: detector

150: matrix circuit 160: electron volume portion

170: audio frequency amplifier 180: speaker

200: RDS demodulator 300: control unit

400: display unit and key input unit

In order to realize the above object of the present invention, the present invention

(Iii) receiving an FM radio signal including RDS data and outputting an FM radio broadcast;

(Ii) checking the on / off of the traffic broadcasting reception mode and if the traffic broadcasting reception mode is off, feeding back the step (i) to output the FM radio broadcasting being output;

(Iii) checking the on / off of the data during the traffic announcement broadcasting when the traffic broadcasting reception mode is on in step (ii), and outputting the FM radio broadcasting being output when the data during the traffic announcement broadcasting is off;

(Iv) terminating the outputting FM radio broadcast when the traffic guidance broadcasting data is on in step (iii);

(Iii) outputting traffic information broadcasts;

(Iii) checking whether the output time of the traffic information broadcast has elapsed 1 minute 15 seconds, and if 1 minute 15 seconds has elapsed, feeding back the step (i) to output an FM radio broadcast; And

(Iii) If 1 minute and 15 seconds have not elapsed in step (iii), check the data during the traffic announcement broadcasting, and if the data during the traffic announcement broadcasting is off, feed back to step (iii) to output the FM radio broadcast. When the data is on during the traffic announcement broadcasting, it provides a traffic information receiving method using the RDS data, which comprises the step of outputting the traffic information broadcasting by feeding back to the step (iii).

According to the traffic information receiving method using the RDS data, the traffic information guide is turned off even when the vehicle does not receive the RDS data in the area receiving the weak electric field level FM signal or the data error area while receiving the traffic information broadcasting. The traffic information broadcast can be faithfully received for a predetermined time without regard.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention through an embodiment of the present invention.

2 is a block diagram of a traffic information receiving apparatus using RDS data according to the present invention.

Referring to FIG. 2, the apparatus for receiving traffic information using RDS data includes an FM receiver 100, an RDS demodulator 200, a controller 300, and a display unit and a key input unit 400.

The FM receiver 100 includes an antenna 110, a tuner unit 120, an IF amplifier 130, a detector 140, a matrix circuit 150, an electronic volume unit 160, an audible frequency amplifier 170, and The speaker 180 is included.

As is generally well known, the FM receiver 100 receives an RF frequency signal including an RDS signal through an antenna 110 of an automobile, and all received radio waves are an RF amplifier 122 and a local oscillator 124. And a tuner unit 120 composed of a mixer 126 selects only one desired FM frequency and converts it into an intermediate frequency. The converted intermediate frequency passes through the IF amplifier 130 and the detector 140 before being modulated. The signal is demodulated and applied to the matrix circuit 150 to separate the L channel audio signal and the R channel audio signal, and output the audio signals of both channels to output radio broadcast.

The RDS demodulator 200 demodulates an inputted RDS signal included in the FM frequency signal and provides the demodulated RDS signal to the controller 300.

In more detail, the demodulated RDS signal is demodulated in a digital type, and the RDS data is composed of group units. One group has four blocks, and one block has 26 bits (16 bits of information + 10 bits of a checker). Send in group units. Since the signal indicating the boundary between each group or each block is not inserted, the start of a group or block must be identified using an offset word in the test word. The test word is a signal for error detection and correction. It adds four offsets A, B, C, and D of 10 bits to each block corresponding to each block, so that the starting point of the block and the number of blocks in the group are added. Identifies the block grant. The information groups of RDS data are in 16 kinds of group types of 0 to 15, and one group type is classified into versions A and B types, respectively. For example, group type 0A is used for AF signal and PS signal, and group type 4A is used for transmission of CT signal. The second block of the group is an address block, and the group type of each group is designated by the first 4 bits of the second block of the group.

As such, among the various data output through the RDS demodulator, the portion of interest in the present invention is included in the data of the 14B group to check the on / off of the TP data for identifying the traffic information broadcasting station and the TA data for identifying traffic information broadcasting. It is.

The control unit 300 is composed of a microcomputer 310 and the timer 320, the RDS demodulation signal provided from the RDS demodulator 200, in the present invention in particular in response to the FM radio broadcast in response to the TP data and TA data Control whether to output continuously or output the traffic broadcast after stopping the FM radio broadcasting.

More specifically, when the RDS receiver has the traffic broadcast receiving button turned on, when the current broadcast is changed to TP = 1 and TA = 1 while the TP = 1 and TA = 0 are in the 14B group data, The car audio set receives the traffic information broadcast by jumping the channel of the FM radio station that was originally listened to by the channel of the traffic information broadcast.

At this time, the control unit 300 operates the timer 320 so as not to return to the original broadcast even if the RDS data is not received for a predetermined time, preferably 1 minute and 15 seconds, and TA data within 1 minute and 15 seconds. If is off, the radio station returns to the originally received radio channel.

3 is a flowchart illustrating a traffic information receiving method using RDS data according to the present invention.

Referring to FIG. 3, when power is applied to a vehicle audio device by input of a key for starting a vehicle (step S21), an FM radio signal including an RDS signal is received to output an FM radio broadcast (step S21). S22).

Then, it is checked whether the RDS reception mode button for receiving traffic information or the like is set on (step S23).

When the RDS reception mode button is set to on in step S23, it is checked whether the TP data is 1 and the TA data is 1 from the data of the 14B group of the RDS signal received together with the FM radio signal (step S24). . In this case, when the TP data is 1 and the TA data is 0, the TP data is fed back to the step to continuously output a radio broadcast.

If the TP data is 1 and TA data is 1 in step S24, the output radio broadcast is stopped (step S25), the traffic information broadcast is switched to output traffic information broadcast (step S26). At this time, the microprocessor 310 of the controller 300 starts the timer 320 together with the output of the traffic information broadcast and checks the time when the traffic information is output.

The control unit 300 continuously checks the timer 320 to check whether a predetermined time, preferably 1 minute 15 seconds, has elapsed (step S27), and the predetermined time, preferably 1 minute 15 seconds, has elapsed. If it is, the traffic information broadcast being output is stopped (step S28), and the feedback is returned to the step S22 to output the radio broadcast originally heard.

In step S27, when 1 minute and 15 seconds have not elapsed, the traffic information broadcast is output and the data of the 14B group of the RDS signal applied is checked at the same time to check whether the TA data in the 14B group is converted from 1 to 0. As long as 1 is continuously checked, the traffic information broadcast is output by feeding back to the step S26. When the TA data is converted from 1 to 0, the traffic information broadcasting is stopped by feeding back to the step S28. The radio broadcast is output (step S29).

As described above, when data on traffic information is output on the RDS FM signal while listening to the RDS FM radio broadcast according to the present invention, the traffic information broadcast is demodulated and outputted during a predetermined time using a timer. Even if it is not received, it does not return to the original broadcast.If the data is turned off during the traffic information broadcast within a certain time, the original broadcast is output so that when the vehicle passes through an area with low field strength or a data error area, The control unit of the audio may stop the traffic information broadcast being broadcast, and may be automatically switched to the FM radio broadcast originally heard and output.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. I can understand that you can.

Claims (1)

(Iii) receiving an FM radio signal including RDS data and outputting an FM radio broadcast; (Ii) checking the on / off of the traffic broadcasting reception mode and if the traffic broadcasting reception mode is off, feeding back the step (i) to output the FM radio broadcasting being output; (Iii) checking the on / off of the data during the traffic announcement broadcasting when the traffic broadcasting reception mode is on in step (ii), and outputting the FM radio broadcasting being output when the data during the traffic announcement broadcasting is off; (Iv) terminating the outputting FM radio broadcast when the traffic guidance broadcasting data is on in step (iii); (Iii) outputting traffic information broadcasts; (Iv) checking whether the output time of the traffic information broadcast has passed a predetermined time, and if the predetermined time has elapsed, feeding back the step (i) to output an FM radio broadcast; And (Iii) If the predetermined time has not elapsed in step (iii), check the data during the traffic announcement broadcasting, and if the data during the traffic announcement broadcasting is off, feed back to step (iii) to output the FM radio broadcast. And outputting the traffic information broadcast by feeding back to the step (i) when the data is on during the traffic announcement broadcast.