JPH04259122A - Radio receiver - Google Patents

Abstract

PURPOSE:To receive automatically a traffic information broadcast of other program network different from that of a broadcast station during reception. CONSTITUTION:When a 2nd identification section 14d identifies it that a traffic information is broadcast by other program network different from that of a broadcast station during reception based on a received RDS data, a system control section 14f implements required source changeover control and sound volume increase control, and a reception program changeover control section 14e uses an AF list relating to the other program network by which the traffic information broadcast is started in the received RDS data to implement changeover control of the reception station.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiver, and more particularly to an information multiplexing radio receiver for multiplexing various data including information related to traffic information broadcasts onto FM broadcasts.

0002

[Prior Art] In a car radio, when a certain station is being received and the vehicle moves out of the service area, the car radio automatically re-selects to a new station broadcasting the same broadcast, and also displays traffic information. It would be convenient to automatically switch to a radio broadcast from another source or increase the volume when a broadcast starts. In order to realize these functions, RDS (Radio Data System) has been proposed and put into practical use by the European Broadcasting Union.

[0003]This RDS multiplexes various digital data onto an FM broadcast signal and transmits it.The messages to be transmitted include (1) program identification code (PI) of the currently received FM broadcast; 2) Program name (PS) (3) Frequency list of the same program network (
AF) (4) Program content identification code (PTY) (5) Transmission status identification code (DI) (6) Music or conversation identification code (M/S) and (
7) Identification code for traffic information broadcasting station (TP); (8) Identification code for traffic information broadcasting (TA).

[0004] In this way, in RDS, the received F
Since messages related to M broadcasting are transmitted multiplexed, unprecedented operations can be performed using these messages. For example, if the electric field strength of the broadcasting station being received drops below a certain level due to vehicle movement, the AF list will automatically be used to automatically switch to another station with good reception that is broadcasting the same program. When the broadcast station you are currently receiving starts broadcasting traffic information, you can automatically switch from another source such as a tape to the radio, or automatically increase the volume when the volume is turned down.

[0005]

[Problem to be Solved by the Invention] However, in conventional RDS radio receivers, operations such as automatic switching from another source to radio are performed only when traffic information broadcasting starts at the broadcasting station being received. In order to obtain traffic information broadcast on a different program network than the broadcast station you are currently receiving, you must manually tune the receiver to the station on the other program network. , the operation was troublesome.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an RDS radio receiver that can automatically listen to traffic information broadcast on a program network different from the broadcast station currently receiving the information.

[0007]

[Means for Solving the Problems] According to one aspect of the present invention, in a radio receiver for information multiplex broadcasting that multiplexes predetermined data regarding its own program network and other program networks on an FM broadcast signal, received data an identification means for another program network that identifies that traffic information is being broadcast on another program network different from the broadcast station that was previously received; and an identification means for identifying that traffic information is being broadcast on another program network. This is achieved by a switching control means that uses channel selection data regarding another program network included in the received data to switch the receiving station to the other program network and output the traffic information broadcast as audio.

In another aspect of the present invention, there is provided identification means for an original program network for identifying that traffic information is being broadcast on a program network of a broadcasting station that has been previously received based on received data; When it is identified by the original program network identification means that traffic information is being broadcast before the program network identification means identifies that traffic information is being broadcast, switching control by the switching control means is prohibited. This is achieved by the original program network priority reception control means which outputs the traffic information broadcast on the original program network that has been received in advance as audio.

In still another aspect of the present invention, there is provided identification means for the original program network for identifying that traffic information is being broadcast on the program network of the broadcasting station previously received from the received data; After the receiving station is switched to another program network by the control means, when it is identified by the identification means for the original program network that traffic information is being broadcast, the receiving station is switched back to the original program network. This is achieved by the original program network priority reception control means that outputs the traffic information broadcast on the program network as audio.

[0010] Another aspect of the present invention is achieved by a return control means for returning to the original reception state and audio output state when the audio output traffic information broadcast ends.

[0011]

[Operation] According to one aspect of the present invention, it is identified from received data that traffic information is being broadcast on another program network different from the broadcasting station that was previously received, and the other program network included in the received data is identified. The receiving station is switched to the other program network and the traffic information broadcast is output as audio using the channel selection data related to the program. As a result, the user can automatically listen to traffic information broadcast on a program network different from the broadcast station currently being received without performing any channel selection operation.

According to another aspect of the present invention, it is identified from received data that traffic information is being broadcast on a program network of a broadcasting station that has been previously received, and traffic information is being broadcast on another program network. When it is identified that traffic information is being broadcast on the original program network before it is identified, the switching control means prohibits the switching control of the receiving station, and Outputs traffic information broadcast as audio. As a result, if a traffic information broadcast starts on the original program network that has been received in advance before a traffic information broadcast starts on another program network, the traffic information broadcast can be listened to to the end with priority.

According to still another aspect of the present invention, it is identified from the received data that traffic information is being broadcast on the program network of the broadcasting station that has been previously received, and the switching control means allows the receiving station to switch to another broadcasting station. After switching to the program network, when it is identified that traffic information is being broadcast on the original program network, the receiving station is returned to the original program network and the traffic information broadcast on the original program network is output as audio. As a result, even after a traffic information broadcast starts on another program network and the receiving station switches, if a traffic information broadcast starts on the original program network that was previously received, that traffic information broadcast will be given priority and listened to until the end. be able to.

According to another aspect of the present invention, when the audio-output traffic information broadcast ends, the original reception state and audio output state are restored. As a result, after listening to the traffic information broadcast, the user automatically returns to the original reception state and audio output state, so the user does not have to perform any return operation.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram showing the configuration of a car stereo with an RDS radio reception function according to an embodiment of the present invention.

1 is an antenna, 2 is a PLL circuit that converts frequency control data into a corresponding control voltage, and 3 is a front end, which receives a broadcast signal of a frequency corresponding to the control voltage input from the PLL circuit 2 from the antenna reception signal. is extracted, converted to an intermediate frequency signal, and output. 4 is an intermediate frequency amplification/detection circuit (IF/DET circuit), which amplifies the intermediate frequency signal and performs FM detection. 5 is an MPX, which demodulates the FM detection signal into a stereo signal. 6 is a switch for switching between radio and tape sources, 7 is a volume, 8 is an amplifier (AMP), and 9 is a speaker.

Reference numeral 10 denotes an RDS decoder, which demodulates RDS data superimposed on the FM detection signal. Reference numeral 11 denotes a signal meter, which detects the received electric field strength by performing DC detection on the intermediate frequency signal output from the intermediate frequency amplification/detection circuit 4. Reference numeral 12 denotes a station detector, which determines that a receiving station exists when the received signal is within the range of the frequency shift Δf (bandwidth) and the received electric field strength is at a predetermined level or higher. That is, when the station detect signal SD is at a low level, even if the received electric field strength detected by the signal meter 11 is large, there is no broadcasting station at the tuning point, and the detected received electric field strength is influenced by neighboring stations. judge that it is received.

Reference numeral 13 denotes a tape playing section, which performs a PLAY operation and a temporary stop operation under the control of a controller to be described later.

14 is a microcomputer-configured controller that controls the overall operation of the car stereo; 15 is an operation unit that performs various operations on the car stereo; 15a is a C/T key that switches between tape and radio sources; 15b is the volume up key to increase the volume, 15c is the volume down key to decrease the volume, 15d is the TA key to turn on/off the automatic traffic information reception mode, and 15e is the one that was received in advance when automatically listening to traffic information broadcasts. SP key for instructing or canceling the priority of the original program network, 15
f is an AP key that, when automatically listening to traffic information broadcasts, instructs or cancels priority of another program network different from the broadcast station that has been received in advance. 16 is a display unit that displays information such as that traffic information is being broadcast. "TRAFFIC" is displayed when a traffic information broadcast is being received on the original program network that was previously received, and "TRAFFIC" is displayed when the traffic information broadcast is being received on another program network different from the broadcast station that was previously received. EON
"TRF" is displayed.

The configuration of the controller 14 will be explained as follows: 1
4a is a memory for storing RDS data (PI, AF, TP, TA, etc.) for each program network (see FIG. 9), volume data, and other data; 14b is for storing RDS data demodulated by the RDS decoder 10; a data registration section for registering in the memory 14a; the first identification section 14c identifies that traffic information is being broadcast based on the TA code related to the program network of the broadcasting station that has been previously received from among the RDS data registered in the memory; 14d is a T that is related to another program network different from the broadcasting station that was previously received among the RDS data registered in the memory.
A second code that identifies that traffic information is being broadcast from the A code.
When it is identified that traffic information is being broadcast on another program network different from the broadcast station that was previously received, the identification unit 14e detects the traffic information on the other program network included in the RDS data in the memory if a predetermined condition is met. This is a receiving program switching control unit that outputs predetermined frequency control data to the PLL circuit 2 side using the channel selection data, and switches the receiving station to another program network different from the broadcasting station that was previously received. .

Reference numeral 14f denotes a system control section, which performs source switching control between tape and radio, volume increase/decrease control, and when in the traffic information automatic reception mode, traffic information is being broadcast by the first identification section or the second identification section. Once it is identified that
Controls source switching from tape to radio, volume increase control, sends a receiving program switching command to the program switching control unit to switch the receiving station to another program network, or broadcasts traffic information on another program network. During the process, the frequency control data related to the original program network is output to the PLL circuit 2 side, and tuning control is performed to return the receiving station to the original program network that was previously receiving the signal. When the information broadcast ends, if the receiving station is different from the program network of the broadcasting station that it has previously received, it performs tuning control to restore the original state, and performs control to restore the volume and source to the original state. Reference numeral 14g is an output section that outputs frequency control data input from the reception program switching control section or the system control section to the PLL circuit 2.

[0022] Furthermore, when the received electric field strength falls below a certain level while receiving a certain broadcasting station, the controller 14 controls the RD
Although it has a function of automatically searching for an alternative station using the AF code related to the program network of the broadcasting station being received in the S data, it is omitted here.

FIGS. 2 to 4 each show an example of an RDS data format that is sent superimposed on an FM broadcast signal. Figure 2 shows a type 0A group for transmitting RDS data related to the program network of the FM broadcast signal itself, and among the four blocks, the first block is the PI (TN), and the second block is the group address, TP. (TN), PTY (TN), TA
(TN), etc., two AFs (TN) in the third block, the fourth
Two characters of PS (TN) are sent in a block. (TN
) indicates that the FM broadcast signal is related to its own program network.

FIG. 3 shows a type 14A group for transmitting RDS data related to a program network different from an FM broadcast signal. Group address, TP (TN), PTY (T
N), TP(ON), information address, 2 characters of PS(ON,, 2 AF(O) in the third block
N), a tuned frequency (TN) and a mapped FM frequency (ON) or mapped LF/M associated with the tuned frequency
F frequency (ON), PTY (ON) and TA (ON), etc.
..., one piece of information corresponding to the information address, PI (ON) is sent in the fourth block. (ON) indicates that the signal is related to another program network different from the FM broadcast signal. AF (ON)
By using channel selection data such as FM frequency (ON), mapped FM frequency (ON), or PI (ON), it becomes possible to switch the receiving station to another desired program network.

FIG. 4 shows a type 14B group for transmitting RDS data at high frequency in place of the type 14A group when traffic information broadcasting starts in another program network.
It is called a group, and among the four blocks,
PI (TN) in the first block, group address in the second block, TP (TN), PTY (TN), TP (O
N), TA (ON), PI (TN) in the third block, and PI (ON) in the fourth block. TA (ON) is more frequent than the type 14A group and can be immediately recognized without referring to the information address. The formats of Figures 3 and 4 were recently proposed by the European Broadcasting Union.

FIGS. 5 to 8 are flowcharts for explaining the operation of the controller 14. FIGS. 5 to 7 are main flows, and FIG. This is an RDS data registration process to the memory 14a executed by interrupt processing. FIG. 9 is an explanatory diagram of RDS data registered in the memory 14a,
Figure 10 shows the display unit 16 when receiving traffic information broadcasting.
FIG. 2 is an explanatory diagram showing a display state of . Description will be given below with reference to these figures.

When the power switch is turned on, the system control unit 14f performs a predetermined initial setting process (step 10).
1) Output the frequency control data related to the broadcasting station that was being received just before the power was turned off last time to the PLL circuit 2 via the output section 14g, reproduce the reception state just before the power was turned off last time, and set the switch 6 to the radio side. , the received broadcast is output as audio, and the C/T flag is set to 0 (radio mode). Further, the volume data immediately before the previous power off is output to the volume 7 to perform volume control, and reproduce the volume immediately before the previous power off. At this time, it is assumed that the received broadcasting station is an RDS traffic information broadcasting station. In addition, the system control unit 14
f clears the TAM (traffic information broadcast automatic reception mode) flag, SPM (original program network priority mode) flag, and APM (other program network priority mode) flag by the initialization process.

[0028] From the broadcast station, the RD superimposed on the FM broadcast signal
S data is sent, demodulated by the RDS decoder 10 of the set, and input to the controller 14. The RDS data includes information regarding the program network of the broadcasting station currently being received, which is indicated with (TN) in FIG. 2, FIG. 3, or FIG. 4;
There are other program networks shown with (ON) in FIG. 3 or 4.

The registration unit 14b of the controller 14 is an RDS
Each time data is input, the interrupt process shown in FIG. 8 is executed to register AF, TP, TA, etc. for each program network (for each PI) in the memory 14a (see FIG. 9). In addition,
The controller 14 constantly monitors the reception status of the broadcasting station being received based on the received field strength signal input from the signal meter 11, and when the reception status deteriorates, the controller 14 monitors the reception status of the broadcasting station registered in the memory 14a. The output unit 14 refers to the AF code related to the program network.
The frequency control data is sequentially outputted to the PLL circuit 2 via g to search for an alternative station, and the station detect signal SD is input from the station detector 12, and the RDS
PI of the same program network from the decoder 10
Signal meter 1 of the stations where the (TN) code was input
Switch the receiving station from 1 to the broadcasting station with the highest received field strength input.

[0030] When you want to listen to the tape performance, the operation section 15
When the C/T key 15a is pressed, the system control unit 14
f sets the C/T flag to 1 (tape mode) (steps 102 and 103), performs PLAY control on the tape performance section 13 to start tape performance, and switches the switch 6 to the tape side to output the tape performance as audio. (steps 104, 105).

[0031] While listening to a tape performance, if a traffic information broadcast starts on a certain program network and you want to listen to it with priority, first press the TA key 1 on the operation section 15.
Press 5d. Then, the system control unit 140
The flag is set to 1 (traffic information automatic reception mode) (steps 106 and 107). Next, if you want to listen to traffic information broadcasts giving priority to the program network of the broadcasting station you are currently receiving, such as when you want to know traffic information around your current location,
Press SP key 15e. Then, system control unit 1
4f sets the SPM flag to 1 (original program network priority mode) (steps 108 and 109).

[0032] If the program network of the broadcasting station that the set is receiving in advance is SP, and the other program network that is not being received in advance is AP, the first identification unit 14c selects the program network that the set has previously received from among the TAs registered in the memory 14a. The second identification unit 14 identifies whether or not traffic information is being broadcast from the state of the TA related to the program network SP of the broadcasting station being received.
Among the TAs registered in the memory 14a, d identifies whether or not traffic information is being broadcast from the status of the TA associated with a program network AP different from the broadcasting station whose set is previously being received.

[0033] The program network S that is being received before the traffic information broadcast starts on another program network AP
When traffic information broadcasting starts at P, TP (TN) = 1, TA (
TN)=1 (however, PI(TN)=PISP), and is registered in the memory 14a. Then, the first identification unit 14c recognizes that TPSP=1, T
From ASP=1, it is identified that traffic information is being broadcast on the program network being received (steps 110 and 20).
1) An identification signal indicating that traffic information is being broadcast is output to the system control unit 14f.

[0034] The system control unit 14f is the first identification unit 14.
When the identification signal is input from c, it is determined whether the source is the radio side or not by referring to the C/T flag (step 202), and since it is the tape side, the tape playing section 13 is controlled to pause (step 203). Switch switch 6 to the radio side to output audio (step 204),
Next, it is determined whether the current volume is above a certain level (step 205), and if NO, the volume at that point is stored in the memory 14.
After storing the information in a, the volume is increased to a certain level (step 206). Then, the characters "TRAFFIC" are displayed on the display unit 16 to indicate that traffic information is being broadcast on the program network SP of the broadcasting station that has been previously received (step 207, see FIG. 10(1)).

[0035] As a result, the tape performance is interrupted and the broadcast of the broadcast station that was previously received is output as audio.
The driver received the program network SP in advance.
The user can listen to the traffic information broadcast broadcast by SP, and can also know from the display that the traffic information broadcast is broadcast on the program network SP, which has been received in advance.

When traffic information broadcasting starts on another program network APx while the program network SP is broadcasting traffic information, the type 14A group in FIG. 4 is switched to the type 14B group and the RDS data regarding the other program network APx is transmitted. It is transmitted frequently, and both TP (ON) and TA (ON) are 1 (P
I(ON)=PIAPx). Then, the second identification unit 14d recognizes that TPAPx =
1. Since TAAPx = 1, another program network SPx different from the program network SP currently receiving
to identify that traffic information is being broadcast (step 208).
), outputs an identification signal indicating that traffic information is being broadcast and PIAPX, which is the PI code of the program network, to the system control unit 14f.

However, since the SPM flag is 1 and the system control unit 14f is set to the original program network priority mode, it does not output a command to switch to another program network SPx, and prohibits switching (in step 209). YES judgment). As a result, the driver can listen to the traffic information broadcast related to the program network SP of the broadcasting station that has been received in advance without interruption, and can understand the situation around the current location in detail. .

When the traffic information broadcast on the program network SP ends, TP(TN)=1, TA(TN)=0 of the RDS data sent in the type 0A group in FIG.
becomes. Then, the first identification unit 14c identifies that the traffic information broadcast has ended in the program network SP that is being received since the TASP registered in the memory 14a becomes 0 (step 210), and that the traffic information broadcast is not in progress. An identification signal indicating this is output to the system control unit 14f.

Then, since the C/T flag is 1, the system control section 14f controls the tape playing section 13 to release the pause and restarts the tape playing (step 211,
212), the switch 6 is switched to the tape side to restart the audio output of the tape performance, and control is performed to restore the volume to the original state, thereby returning the audio output state to the original state (steps 213, 214). Then, display section 1
Turn off the “TRAFFIC” display of 6 (Step 2
15). Thereby, the driver can continue listening to the tape performance that was interrupted while receiving the traffic information broadcast without any operation.

Note that TAM flag=1, SPM flag=
1, the program network SP that is being received in advance
When traffic information broadcasting starts first on a certain program network APx different from TP(ON)=1, T
RDS data in the type 14B group where A(ON)=1 and PI(ON)=PIAPx is frequently transmitted and registered in the memory 14a. Then, the second identification unit 14d determines that TPAPx = 1 registered in the memory 14a,
Other program network APs than TAAPX = 1
to identify that traffic information is being broadcast (step 216).
), an identification signal indicating that traffic information is being broadcast, and the PI code of the program network = PIAPx are output to the system control unit 14f.

At this time, the system control section 14f performs source switching control and volume increase control for the radio side (steps 217 to 221), and displays "EON TR" on the display section 16.
F" is displayed (step 222, FIG. 10(2)). Next, a reception program switching command including PIAPx is output to the program switching control section 14e, and the frequency and PI code of the original receiving station are stored in the memory 14a.
A related to program network APx registered in a
With reference to F, frequency control data is sequentially outputted to the PLL circuit 2 via the output section 14g to search each station of the program network APx, and the station detector 12
Station detect signal SD is input from RD.
Among the stations to which PIAPx is input as PI (TN) from the S decoder 10, the receiving station is switched to the broadcasting station with the highest received electric field strength input from the signal meter 11 (
Step 223).

[0042] Thereby, it is possible to listen to traffic information broadcasts made on program networks other than the program network currently being received, and it is possible to obtain traffic information around the destination, etc. Further, it can be seen from the display that traffic information broadcasting is being received on another program network different from the broadcasting station that was previously received.

[0043] The receiving station is a new program network A.
When the broadcast station changes to Px, the RDS data transmitted in the type 0A group will be related to the program network APx, and the information of the original program network SP that was received in advance will be transmitted in the type 14A group or type 14B group. become.

After that, the original program network SP
When the traffic information broadcast on the program network APx ends without starting the traffic information broadcast, the TP (TN) of the RDS data sent in the type 0A group in Figure 3
=1, and TA(TN)=0. Then, the second identification unit 14c identifies that the traffic information broadcasting has ended on the program network APx since the TAAP registered in the memory 14a becomes 0 (step 301), and identifies that the traffic information broadcasting is not in progress. Signal to system control unit 1
Output to 4f.

Then, the system control section 14f cancels the pause on the tape performance section 13, returns the switch 6 to the tape side, returns the volume to the original state, and returns to the original audio output state (steps 302 to 305). ),
Erase the display of "EON TRF" (step 306)
. Further, the frequency control data related to the broadcast station that was being received on the original program network SP is outputted to the PLL circuit 2 via the output section 14g, thereby returning to the receiving state of the original program network (step 307).

[0046] If traffic information broadcasting is started on the original program network SP while receiving traffic information broadcasting on the program network APx, TP(ON)=1, T
RDS data in the type 14B group where A(ON) = 1 and PI(ON) = PISP is frequently transmitted,
It is registered in the memory 14a. Then, the first identification section 14
c is TPsp=1, TASP registered in the memory 14a
=1, it is identified that traffic information is being broadcast on the original program network SP (step 308), and an identification signal indicating that traffic information is being broadcast is output to the system control unit 14f.

At this time, the system control unit 14f determines whether the APM flag is 1 (other program network priority mode) (step 309), and since it is NO, "EON
TRF" display (step 310), and the frequency control data related to the broadcast station that was being received on the original program network SP is output to the PLL circuit 2, returning to the receiving state on the original program network SP (step 310). 31
1) Display "TRAFFIC" (step 20
7). Thereby, the driver can reliably listen to the traffic information broadcast on the original program network SP. When the traffic information broadcast on the program network SP ends, the original audio output state based on tape performance is restored (steps 210 to 215).

If it is desired to cancel the priority state of the original program network, the SP key 15e of the operation section 15 is pressed again. Then, the system control unit 14f sets the SPM flag to 0 and cancels the original program network priority mode (steps 108 and 109). Contrary to the above, if you want to listen to the traffic information broadcast giving priority to other program networks, press the AP key 15f of the operation unit 15, and the system control unit 14f will set the APM flag to 1 (other program network priority mode). ) (steps 111, 112).

[0049] In this case, before the traffic information broadcast starts at the broadcasting station that is currently receiving the traffic information, another program network AP
When the traffic information broadcast starts at x, the receiving station is controlled by the controller 15 to switch to the program network A of the other station.
Px and the source is also switched to the radio side (steps 216 to 223). Then, even if the traffic information broadcast starts on the original program network SP while the traffic information broadcast is being broadcast on the program network APx, the other program network priority mode with APM brag = 1 will continue until the traffic information broadcast on the program network APx ends. Original program network S
The receiving station is not returned to P (Y in step 309).
ES judgment). Therefore, the user can listen to the traffic information broadcast on other program networks until the end without interrupting the program.

[0050] Furthermore, even if traffic information broadcasting starts first on the program network SP that is currently receiving and audio is output, other program networks APx may
When the traffic information broadcast starts, the original program network priority mode is canceled with SPM brag = 0, so the receiving station is immediately switched to the other program network APx (NO in step 209,
224, 222, 223). Therefore, the driver can reliably listen to traffic information broadcast on other program networks. When the traffic information broadcast on the program network APx is finished, the original audio output state based on tape performance is restored, and the receiving station also returns to the original program network AP (steps 301 to 307). If the user wishes to cancel the network priority mode for other programs, the AP key 14f may be pressed again (steps 111, 112).

Note that when traffic information broadcasting starts with the source being the radio side, source switching control is not performed (YES in step 202 or 217).

In the above embodiment, the AF (ON) transmitted in the type 14A group is used to switch to another program network where traffic information broadcasting has started, but the switching is performed using the mapped FM frequency (ON). Alternatively, the switching may be performed by using PI (ON) to search for the program network where the traffic information broadcast has started.

[0053]

According to one aspect of the present invention, there is an identification for another program network that identifies, based on received data, that traffic information is being broadcast on another program network different from the broadcasting station that was previously received. and when it is identified that traffic information is being broadcast on another program network, the receiving station is switched to the other program network using tuning data regarding the other program network included in the received data. A switching control means for outputting traffic information broadcast as audio is provided, and the system identifies from the received data that traffic information is being broadcast on a different program network from the broadcasting station that was previously received, and outputs the traffic information from another program included in the received data. Since the configuration is configured to use channel selection data related to the network to switch the receiving station to the other program network and output traffic information broadcasts as audio, the user can listen to the broadcast being received in advance without performing any channel selection operation. It is possible to automatically listen to traffic information broadcast on other program networks different from the station.

According to another aspect of the present invention, identification means for the original program network identifies that traffic information is being broadcast on the program network of the broadcasting station that has been previously received from the received data; When the identification means for the original program network identifies that traffic information is being broadcast before the identification means for the program network identifies that traffic information is being broadcast, the switching control means performs switching control. An original program network priority reception control means is provided which prohibits and outputs the traffic information broadcast on the original program network that was previously received as audio, and traffic information is being broadcast on the program network of the broadcast station that was previously received based on the received data. and when it is identified that traffic information is being broadcast on the original program network before it is identified that traffic information is being broadcast on another program network,
Since the switching control means is configured to prohibit the switching control of receiving stations and output the traffic information broadcast on the original program network that has been received in advance as audio, before the traffic information broadcast starts on the other program network, If a traffic information broadcast starts at a broadcast station that has been previously received, the user can listen to the traffic information broadcast to the end with priority.

According to still another aspect of the present invention, identification means for an original program network identifies that traffic information is being broadcast on a program network of a broadcasting station that has been previously received from received data; After the receiving station is switched to another program network by the switching control means, when the identification means for the original program network identifies that traffic information is being broadcast, the receiving station is switched back to the original program network. A source program network priority reception control means is provided for outputting traffic information broadcast on a program network as audio, and a switch control means identifies from received data that traffic information is being broadcast on a program network of a broadcast station that has been previously received. After the receiving station is switched to another program network, when it is identified that traffic information is being broadcast on the original program network, the receiving station is switched back to the original program network and the traffic information is broadcast on the original program network. Because the configuration is configured so that the broadcast is output as audio, even after the traffic information broadcast starts on another program network and the receiving station switches, if the traffic information broadcast starts on the broadcast station that was previously received, the traffic information broadcast will be given priority. You can listen to it till the end.

According to another aspect of the present invention, a return control means is provided for returning to the original reception state and audio output state when the audio-output traffic information broadcast ends, and the audio-output traffic information The configuration is configured to return to the original reception state and audio output state when the broadcast ends, so after listening to the traffic information broadcast, the user automatically returns to the original reception state and audio output state, so there is no need for the user to return to the original reception state and audio output state. No need to operate.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a car stereo with an RDS radio reception function according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of an RDS data transmission format.

FIG. 3 is an explanatory diagram showing an example of an RDS data transmission format.

FIG. 4 is an explanatory diagram showing an example of an RDS data transmission format.

FIG. 5 is a flowchart showing part of the operation of the controller of FIG. 1;

FIG. 6 is a flowchart showing part of the operation of the controller of FIG. 1;

FIG. 7 is a flowchart showing part of the operation of the controller of FIG. 1;

FIG. 8 is a flowchart showing part of the operation of the controller of FIG. 1;

[Figure 9] RD stored in the memory of the controller in Figure 1
It is an explanatory diagram of S data.

FIG. 10 is an explanatory diagram showing a display state on the display section of FIG. 1;

[Explanation of symbols]

3 Front end 4 Intermediate frequency amplification/detection circuit 6 Switch 7 Volume 10 RDS decoder 13 Tape performance section 14 Controller 14c First identification section 14d Second identification section 14e Reception program switching control section 14f System control section 15 Operation section

Claims (4)

[Claims] Claim 1: In a radio receiver for information multiplex broadcasting that multiplexes predetermined data regarding its own program network and other program networks onto an FM broadcast signal, the radio receiver is configured to multiplex predetermined data regarding its own program network and other program networks onto an FM broadcast signal. Identification means for other program networks that identifies that traffic information is being broadcast on a program network, and other programs included in received data when it is identified that traffic information is being broadcast on another program network. A radio receiver comprising: switching control means for switching a receiving station to the other program network and outputting a traffic information broadcast as audio, using channel selection data regarding the network. 2. An identification means for the original program network that identifies that traffic information is being broadcast on the program network of the broadcasting station that has been previously received from the received data, and an identification means for the other program network to identify the traffic information. When it is identified by the original program network identification means that the traffic information is being broadcast before it is identified that the information is being broadcast, the switching control by the switching control means is prohibited and the information has been received in advance. 2. The radio receiver according to claim 1, further comprising original program network priority reception control means for outputting traffic information broadcast on the original program network as audio. 3. An identification means for an original program network that identifies that traffic information is being broadcast on a program network of a broadcasting station that has been previously received based on received data; network, when the identification means for the original program network identifies that traffic information is being broadcast, the receiving station is switched back to the original program network and the traffic information broadcast on the original program network is audio-recorded. 2. The radio receiver according to claim 1, further comprising network priority reception control means for outputting the original program. 4. The radio reception according to claim 1, further comprising a return control means for returning to the original reception state and audio output state when the audio output traffic information broadcast ends. Machine.