JP2001308732A - Radio broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio broadcasting receiver which takes quickly Eid information, Sid information, and frequency information on DAB broadcast to an RDS broadcast receiving function side. SOLUTION: In a multiplex broadcasting receiver in which at least RDS broadcast reception and DAB broadcast reception are possible, information on the DAB broadcast included in received RDS multiplex data is made into a pair with a PI cord of RDS broadcast being received now and is written in a memory 5 under control of a wiring control circuit 41. When the same broadcast as the broadcast corresponding to the PI cord stored in the memory 5 is received after changing the received frequency of the RDS broadcast, the information on the DAB broadcast stored in the memory 5 as the pair with the PI cord is read under the control of a readout control circuit 42 to be handed over to a DAB tuner 2 as the information for the reception.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio broadcast receiver capable of receiving a radio data multiplex system broadcast and a digital radio broadcast.

[0002]

2. Description of the Related Art An FM tuner capable of receiving an RDS broadcast (simply an FM tuner or an RDS tuner) as a receiver for a data multiplex system broadcast such as an RDS (Radio Data System) and a DAB (Digital Audio Broadcasting) and a digital radio broadcast. And D)
AB broadcast receiving tuner (also simply referred to as DAB tuner)
Is provided as a basic function of a radio broadcast receiver configured to be connected to each other, or as a basic function of a radio broadcast receiver configured such that an RDS broadcast receiver and a DAB broadcast receiver are set in the same housing. Is the information of DAB broadcast (hereinafter referred to as ODA (Open Da) in the received RDS multiplexed data.
ta Application) information, the RDS broadcast receiving function side provides the DAB receiving function side with information such as an ensemble identification (ID) code, a service identification (ID) code and a frequency of the DAB broadcast obtained by the ODA information. By handing over, the DAB receiving function side also receives the same broadcast as the RDS broadcast receiving side, and the reception state in the RDS broadcast and DA
It has been practiced to compare the reception status of the B broadcast and select a broadcast having a better reception status as an audio output.

Here, a group of carrier frequencies corresponding to each broadcast channel is called an ensemble, and a plurality of broadcast programs are multiplexed on each ensemble. The ensemble ID code is also referred to as Eid, and the service ID code is also referred to as Sid.

[0004] The data format of the RDS broadcast group type 3A is as shown in FIG.
I code), Group Type Cod
e), application group type code (Applica
Option Group Type Code), Application Identification (AID) information,
AID information).

In order to take in information such as Eid information, Sid information, and frequency information of DAB broadcasting, first, as shown in a flowchart of FIG. 8, an application group type code and AID information included in an RDS broadcasting group type 3A are acquired. And analyzes the application group type code and AID information, and stores the analysis result in the memory (steps S41 and S42).

Here, when the value of the AID information is 147 (decimal number), the application group type code is the Eid information, Sid information, and frequency of the DAB broadcast that is performing the same broadcast as the currently received RDS broadcast. This indicates that the group type includes information such as information.

When RDS multiplexed data of a group type that matches the application group type code obtained above is sent (step S43), the ensemble information or service information, which is the content of the group type, is broken down and Eid Information, Sid information, broadcast frequency information, and information such as whether the current broadcast is the same are read, and the storage content of the memory is updated (step S44). Next, the RDS multiplexed data of another group type is analyzed, and the storage content of the memory is updated (step S45).

Next, when there is a change in the PI code, the application group type code, AID information, Eid information of the DAB broadcast, Sid information, frequency information and the like are deleted from the memory (steps S46 and S4).
7).

[0009] Broadcasting stations currently transmitting DAB broadcast information in RDS broadcasts are rare. In addition, the user of the radio broadcast receiver does not know whether or not the currently received RDS broadcast contains multiplexed data including DAB broadcast information.

On the RDS broadcast receiving function side, when the EON information (group type 14A, 14B) is broken and traffic information starts, the frequency is immediately switched to another frequency and the traffic information is received. There is a function to return to the original frequency to end.

[0011] In the case of a conventional radio broadcast receiver, the switching of the traffic information is performed particularly from the RDS reception function side.
No frequency switching to the DAB receiving function is performed.

[0012]

However, the RDS
There is a problem that the content of the application group type code and the AID information included in the ODA information (group type 3A) of the broadcast cannot be confirmed unless the broadcast frequency is received once.

Then, based on the information, DAB
Broadcast Eid information, frequency information, DAB broadcast Eid information
There is also a problem that it is necessary to take in relational data between information and Sid information.

First, the group type 3A is received several times, and a match between the application group type code and the code of the AID information included in the group type 3A is detected. To D
A group type including AB broadcast information is determined, and then
There is a problem that data of Eid information, Sid information, and frequency information of DAB broadcasting must be taken, and it takes a very long time to perform these processes.

In the case of a radio broadcast receiver, the RDS
When switching from broadcasting to DAB broadcasting in a better reception state where the same broadcasting is being performed, there is a problem that it takes time to accumulate data and switching is not performed smoothly.

At present, broadcast stations transmitting DAB broadcast information in RDS broadcasts are rare, and users of radio broadcast receivers are currently receiving RDS broadcasts that include multiplexed data containing DAB broadcast information. DA without knowing whether or not
There is also a problem that even if a B receiving function is provided, the function cannot be used effectively.

The RDS receiving function side receives EON information (groups 14A and 14B), switches to another frequency, receives traffic information, and returns to the original frequency when the traffic information ends. Depending on the location where the RDS broadcast is being received without switching, even if EON information is included in the currently received RDS broadcast,
There is a problem that another frequency included in the ON information cannot be received and traffic information cannot be received.

An object of the present invention is to solve the above problems and to provide a radio broadcast receiver in which digital radio broadcast information can be promptly taken into the radio data multiplex system broadcast receiving function side.

[0019]

A radio broadcast receiver according to the present invention is a radio broadcast receiver capable of receiving at least a radio data multiplex system broadcast and a digital radio broadcast, comprising: storage means; Writing control means for storing information of digital radio broadcast included in the data of the data multiplex system in a storage means in combination with a predetermined code of the data multiplex system broadcast of the radio currently being received, and a radio data multiplex system After changing the reception frequency of the broadcast, when receiving the same broadcast as the broadcast corresponding to the predetermined code stored in the storage means, the digital radio stored in the storage means in pair with the predetermined code The broadcast information is read, and the read digital radio broadcast information is received by the digital radio broadcast receiving function side. And read control means to pass as information, characterized by comprising a.

According to the radio broadcast receiver of the present invention, the digital radio broadcast information contained in the multiplexed data of the received radio data multiplexing system is converted into the predetermined format of the currently received radio data multiplexing system broadcast. After the reception frequency of the data multiplex system broadcasting of the radio is changed under the control of the writing control means in combination with the code, the same as the broadcast corresponding to the program identification code stored in the storage means When receiving the broadcast, the digital radio broadcast information stored in the storage means in pair with the predetermined code is read under the control of the read control means, and the read digital radio broadcast information is digitally read. It is delivered to the radio broadcast receiving function as information for reception.

As a result, if the predetermined code of the radio data multiplex system broadcast can be confirmed, the digital radio broadcast information is transferred to the digital radio broadcast function side, so that the switch to the digital radio broadcast reception can be smoothly performed. Become.

In the radio broadcast receiver according to the present invention, the predetermined code may be a program identification code.

In the radio broadcast receiver according to the present invention, it is detected that digital radio broadcast information is included in the data of the received radio data multiplexing system, and the detection indicates that the digital radio broadcast information is present on the display. May be provided.

In the radio broadcast receiver according to the present invention, when the display control means is provided, the digital radio broadcast is displayed on the display by detecting that the data of the received radio data multiplex system includes the digital radio broadcast information. Is displayed, and the function of digital radio broadcast reception can be used effectively.

In the radio broadcast receiver according to the present invention, if the data of the received radio data multiplex system includes other network station information, the same service station as the other network station information of the radio data multiplex system broadcast is provided. May be provided from among the digital radio broadcasts, and another-station information station broadcast reception control means for selecting an audio signal output having a better reception state between the radio data multiplex system broadcast and the digital radio broadcast.

In the radio broadcast receiver according to the present invention, when the other station information station broadcast reception control means is provided, if the received radio data multiplex system broadcast data includes other station information, the radio data The same service station as the other station information station of the multiplex system broadcast is searched from the digital radio broadcast, and the audio signal output with the better reception condition between the radio data multiplex system broadcast and the digital radio broadcast is selected. Therefore, it is possible to listen to the broadcast of the other station information station in a good reception state.

[0027] In the radio broadcast receiver according to the present invention, the other station information may be other station traffic information.

In the radio broadcast receiver according to the present invention, when the digital radio broadcast receiving function side and the radio data multiplex system broadcast receiving function side receive different broadcasts, the radio data multiplex system broadcast receiving function side After the reception is switched to the same broadcast reception based on the request for switching to the same broadcast to the digital radio broadcast function side, when the user switches the audio source to the digital radio broadcast side again by the user, the same broadcast Channel selection means for receiving digital broadcasts which had been selected immediately before the switching to.

In the radio broadcast receiver according to the present invention, when the channel selection control means is provided, the digital radio broadcast receiving function side and the radio data multiplexing system broadcast receiving function side receive different broadcasts. After the radio data multiplexing system switches from reception by the broadcast reception function side to reception of the same broadcast based on a request to switch to the same broadcast to the digital radio broadcast function side, the user re-enters the digital radio broadcast by the user , The digital radio broadcast selected just before switching to the same broadcast is received. Therefore, there is no need to re-select a digital radio broadcast station that had been selected immediately before switching to the same broadcast.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a radio broadcast receiver according to the present invention will be described with reference to embodiments.

FIG. 1 is a block diagram showing the configuration of a radio broadcast receiver according to one embodiment of the present invention.

As shown in FIG. 1, a radio broadcast receiver 10 according to an embodiment of the present invention includes an FM tuner 1 including an RDS decoder as a radio data multiplex broadcast receiver and a digital radio broadcast receiver. The audio signal from the DAB tuner 2 and the FM tuner 1 including the DAB decoder and the audio signal from the DAB tuner 2 are supplied to the audio signal switching unit 3 and one of them is selected and output to the audio signal amplifier, and the audio signal is output by the speaker. It is configured to convert.

Further, the radio broadcast receiver 10 includes a control circuit 4 composed of a computer. The control circuit 4 cooperates with the memory 5 to control the FM tuner 1 based on an instruction output from the display / operation unit 6. The FM tuner control signal a is output to control the FM tuner 1 and the DAB tuner 2
The tuner control signal b is output to control the DAB tuner 2, and the reception state signal c from the FM tuner 1 and the RDS
Receiving the demodulated data d, receiving the reception state signal e from the DAB tuner 2, and sending out an audio switching control signal f to the audio signal switching unit 3 to control switching of the audio signal switching unit 3 and display / operation unit. 6
Display control.

Furthermore, the control circuit 4 receives the received RD
A write control circuit 41 for storing the information of the DAB broadcast included in the S-multiplexed data in the memory 5 in a pair with the PI code of the currently received RDS broadcast, and a memory for changing the reception frequency of the RDS broadcast; 5, when the same broadcast as the broadcast corresponding to the program identification code stored in the memory 5 is received, the DA stored in the memory 5 is paired with the PI code.
A read control circuit 42 for reading information of the B broadcast and transferring the read information of the DAB broadcast to the DAB tuner 2 as information for reception is functionally provided.

Further, the control circuit 4 detects that the received RDS multiplexed data contains the information of the DAB broadcast, and by this detection, causes the display / operation unit 6 to display the presence of the information of the DAB broadcast. If the received RDS multiplexed data includes EON information corresponding to other network station information, the same service station as the EDS station of the RDS broadcast is searched from the DAB broadcast, and the reception status of the RDS broadcast and the DAB broadcast is searched. If the DAB tuner 2 and the RDS tuner 1 are receiving different broadcasts from the EON station broadcast reception control circuit 44 that selects the audio signal output of the better one, the reception by the RDS tuner 1 causes the DAB tuner 2 On the other hand, after switching to the same broadcast reception based on the request for switching to the same broadcast, the user again switches the audio source to DAB broadcast. When switching to a, and a channel selection control circuit 45, DAB broadcasting receiver that immediately before switching was tuned to to the same broadcast functional.

Here, the write control circuit 41 corresponds to the write control means, the read control circuit 42 corresponds to the read control means, the display control circuit 43 corresponds to the display control means, and the EON station broadcast reception control circuit 44 The station selection control circuit corresponds to the other station information station broadcast reception control means, and the channel selection control circuit corresponds to the channel selection control means.

The operation of the radio broadcast receiver 10 configured as described above will be described with reference to FIGS.

Each of the routines shown in FIGS. 2 to 7 is called and executed in sequence.

RD received by the radio broadcast receiver 10
When the analysis of the RDS multiplexed data demodulated from the S received signal is started, as shown in FIG.
It is checked whether it is ODA information (group 3A) of S broadcast, and when it is determined that it is ODA information (group 3A) (step S1), the application group type code included in the ODA information (group 3A) of RDS broadcast The AID information is analyzed and updated and stored in the memory 5 as a pair with the PI code of the currently received RDS broadcast (step S2).

Next, it is checked whether the group type matches the application group type code, and if it is determined that the group type matches the application group type code (step S3), R
DAB Edi information, Sid information in DS multiplex data,
The frequency information and the like are analyzed, the analysis result is updated and stored in the memory 5 in combination with the PI code (step S4), and then the RDS multiplexed data of other group types is analyzed and updated and stored in the memory 5 (step S4). S5).

As described above, the application group type code and the AID information included in the ODA information (group type 3A) of the RDS broadcast indicate that once the RDS broadcast frequency is received, the currently received RDS broadcast / PI
The code and the information of the group type 3A are paired and stored in the memory 5.

Next, when the same broadcast as the PI code stored in the memory 5 is received again after changing the receiving frequency of the RDS broadcast, the contents stored in the memory 5 are searched by referring to the PI code. The information of the ODA information (group type 3A) stored in the memory 5 is read.

That is, as shown in FIG. 3, awaiting the determination of the PI code (step S7), and referring to the PI code, the memory 5 of the storage content data paired with the PI code
(Step S8), it is checked whether or not the data of the ODA information (group type 3A) corresponding to the PI code is stored in the memory 5 (step S9).

In step S9, if the data of the ODA information (group type 3A) corresponding to the PI code is stored in the memory 5, the application group type code of the stored ODA information (group type 3A) The AID information is read from the memory 5 (Step S10).

Next, it is checked whether DAB data corresponding to the PI code is stored in the memory 5 (step S11). If it is determined in step S11 that the DAB data corresponding to the PI code is stored in the memory 5, the DAB data stored in the memory 5
Broadcast Eid information, Sid information, frequency information, and the like are read from the memory 5 (step S12).

Next, Eid information, Sid information, and frequency information are delivered to the DAB tuner 2 (step S13).

As described above, once the broadcast frequency is received, the PI code and OD of the currently received RDS broadcast are received.
D obtained based on the information of A information (group type 3A)
Eid information of AB broadcast. Sid information, frequency information and DA
The relation data between the Eid information and the Sid information of the B broadcast is delivered to the memory 5 as a pair and stored in the memory 5. In this way, the reception frequency is changed, and the
When the same broadcast as the PI code stored in is received, the memory 5 is searched, and the information of these DAB broadcasts is read.

Each time the radio broadcast receiver 10 receives the RDS multiplexed data, a display process for displaying whether or not DAB information is included in the RDS broadcast information is executed as shown in FIG.

In this display process, as shown in FIG. 4, the DAB tuner 2 is provided in the radio broadcast receiver 10 (step S15), and the received RDS multiplexed data contains
When the group type (3A) including the information of the AB broadcast exists (step S16), a display indicating that the DAB information is included in the received RDS broadcast information is lit on the display of the display / operation unit 6. (Step S17).

As described above, in the radio broadcast receiver 10, the display processing to the effect that the information of the DAB broadcast is included in the received RDS multiplexed data is executed.

When the radio broadcast receiver 10 receives the EON traffic information, an EON traffic information interruption process is executed as shown in FIG.

When the EON traffic information interrupt processing is executed, an EON information station is searched from the received information in the FM tuner 1 (step S19), and the radio broadcast receiver 1 is searched.
0 when the DAB tuner 2 exists (step S2
0), EON of RDS broadcast to DAB tuner 2
A search for a broadcasting station having the same service as the station is requested (step S21), and the audio signal switching unit 3 selects the audio signal with the better reception state of the RDS broadcast and the DAB broadcast (step S22).

That is, in the received RDS multiplexed data,
When the E0N information (group types 14A and 14B) is included, the FM tuner 1 switches to another frequency, and simultaneously transmits the ID information included in the E0N information (group types 14a and 14B) to the DAB tuner 2.
By handing over to the tuner 2, the DAB tuner 2 can also search for a broadcasting station that broadcasts traffic information and finally hear either RDS broadcast or DAB broadcast traffic information.

Also, the FM tuner 1 can obtain Eid information, Sid information, and frequency information of DAB broadcasting by ODA information (group type 3A).
By transferring the signal to the AB tuner 2, the frequency can be switched more quickly.

According to the above-described radio broadcast receiver 10 according to the embodiment of the present invention, the information of the ODA information (group type 3A) is determined immediately after the reception of the RDS broadcast. The data of the Eid information and Sid information of the DAB broadcast to be acquired can be quickly taken in.

After the RDS broadcast is received, if the PI code of the RDS broadcast can be confirmed, the DAB broadcast related data (data of the Eid information and Sid information of the DAB broadcast) corresponding thereto is already stored. By transferring the data to the tuner 2, switching to DAB broadcasting can be performed smoothly. It is possible to receive a multiplex broadcast in a good reception state.

According to the display on the display of the display / operation unit 6,
The user can know whether the currently received RDS broadcast includes multiplexed data including DAB broadcast information,
An RDS broadcasting station that can effectively use DAB broadcasting can be arbitrarily selected.

Also, the DAB tuner 2 can search for traffic information using data from the RDS broadcast, and the area where traffic information can be received is expanded.

Next, the RDS tuner 1 and the DAB tuner 2
The selection of the tuner with the better reception condition among the above will be described.

In the case of changing the audio source for selecting the audio signal output of the DAB tuner 2 instead of the audio signal of the RDS tuner 1, as shown in FIG. 6, the radio broadcast receiver 10 controls the electric field of the currently received broadcast. The reception state is analyzed by reading the level of the intensity and the noise component (step S25). When it is determined that the RDS reception state is bad (step S26), it is checked whether or not the ODA data related to the DAB broadcast has been accumulated. (Step S
27).

If it is determined in step S27 that ODA data related to DAB broadcasting has been stored, the RDS
Eid information and Sid of DAB broadcasting in multiplexed data
Information, frequency information, and the like are delivered to the DAB tuner 2 (step S28). DA based on delivered information
The reception state in the B tuner 2, that is, the electric field strength, the noise level, and the like are read and analyzed (step 29).

Step S29 can be executed only in DAB
On the tuner 2 side, the E of the delivered DAB broadcast
This is because a broadcast transmitting the same data can be searched for based on id information, Sid information, frequency information, and the like.

Based on the analysis result in step S29, it is checked whether the reception state by DAB tuner 2 is good or not (step S30). If it is determined in step S30 that the reception state by DAB tuner 2 is good, the same broadcasting is performed. The audio signal is switched to the DAB broadcast that performs (step S31).

As described above, in the RDS tuner 1, the reception status of the currently received broadcast is checked each time this routine is executed, that is, the reception status is periodically and repeatedly checked.
If the reception state by the tuner 1 is determined to be bad and there is a DAB broadcast that performs the same broadcast, the information of the DAB broadcast that performs the same broadcast is delivered to the DAB tuner 2 and the reception of the same broadcast by the DAB tuner 2 is performed. When the condition is good, the audio signal switching unit 3 switches from an audio signal based on the RDS broadcast to an audio signal of a DAB broadcast performing the same broadcast under the control of the control circuit 4.

When the reception state by the RDS tuner 1 is good, when the broadcast of the same content is not found in the DAB broadcast, or when the DAB broadcast of the same content is found, the DAB
When the reception state by the B tuner 2 is bad, the output audio signal from the RDS tuner 1 is maintained as it is.

When a broadcast having the same content is found and the control circuit 4 switches the audio signal to the output audio signal side of the DAB tuner 2, the DAB tuner 2
In some cases, a broadcast from a station having a frequency different from the frequency originally selected is received.

In such a case or manually,
When switching to the broadcast side, as shown in FIG.
A switching request is made by an audio source switching instruction switch on the operation unit 6 (step S32), and D
When switching to the source of the AB broadcast, the information of the DAB broadcast received immediately before is stored in the memory 5 (step S33), and the service that was last selected at the time of the source of the DAB broadcast stored in the memory 5 is selected. A station is selected (step S34).

Therefore, when the DAB tuner 2 is receiving a different broadcast from the RDS tuner 1, the reception state deteriorates during reception by the RDS tuner 1, and a request to switch the DAB tuner 2 to the same broadcast is issued. Out, then
After switching to the same broadcast, when the user switches the audio source to the DAB broadcast again, the user can listen to the DAB broadcast selected immediately before, so that there is no need to reselect the channel.

In the case of manually switching to the DAB broadcasting side, unless the routine shown in FIG. 7 is executed,
When returning to the DAB broadcast reception, the reception frequency may be different from the frequency of the broadcast received immediately before. In such a case, the reception frequency has to be returned manually. That is, the trouble of reselecting the channel becomes unnecessary.

[0070]

As described above, according to the radio broadcast receiver of the present invention in accordance with the embodiment, according to the radio broadcast receiver of the present invention, the ODA information of the DAB broadcast can be transmitted quickly to the R.
The effect of being able to take in the DS broadcast receiving function side is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a radio broadcast receiver according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the radio broadcast receiver according to the embodiment of the present invention.

FIG. 3 is a flowchart for explaining an operation of the radio broadcast receiver according to the embodiment of the present invention;

FIG. 4 is a flowchart for explaining an operation of the radio broadcast receiver according to the embodiment of the present invention;

FIG. 5 is a flowchart for explaining an operation of the radio broadcast receiver according to the embodiment of the present invention;

FIG. 6 is a flowchart for explaining an operation of the radio broadcast receiver according to the embodiment of the present invention;

FIG. 7 is a flowchart for explaining the operation of the radio broadcast receiver according to the embodiment of the present invention;

FIG. 8 is a flowchart for explaining the operation of a conventional radio broadcast receiver.

FIG. 9 is a schematic diagram of a data format of an RDS broadcast group type 3A.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 FM tuner 2 DAB tuner 3 audio signal switching unit 4 control circuit 5 memory 6 display / operation unit 41 write control circuit 42 read control circuit 43 display control circuit 44 EON station broadcast reception control circuit 45 station selection control circuit

Claims (6)

[Claims] 1. A radio broadcast receiver capable of receiving at least a radio data multiplex system broadcast and a digital radio broadcast, comprising: storage means; a digital radio broadcast included in the received radio data multiplex system data. Write control means for storing in the storage means a pair of information of the radio data multiplex system broadcast currently being received with a predetermined code, and storing the information in the storage means after changing the reception frequency of the data multiplex system broadcast of the radio When receiving the same broadcast as the broadcast corresponding to the predetermined code, the information of the digital radio broadcast stored in the storage means is read out in pairs with the predetermined code, and the read digital radio broadcast is read. Reading control means for transferring information to the digital radio broadcast receiving function as information for reception. A radio broadcast receiver. 2. The radio broadcast receiver according to claim 1, wherein the predetermined code of the radio data multiplex system broadcast is a program identification code. 3. The radio broadcast receiver according to claim 1, wherein information of the digital radio broadcast is included in the received data of the radio data multiplexing system, and the information of the digital radio broadcast is displayed on a display by the detection. A radio broadcast receiver comprising display control means for performing presence display. 4. The radio broadcast receiver according to claim 1, wherein, when the received data of the radio data multiplex system includes other network station information, the data of the radio data multiplex system broadcast includes other network station information. It is also provided with another station information station broadcast reception control means for searching for the same service station during digital radio broadcasting, and selecting an audio signal output having a better reception state between the radio data multiplex system broadcast and the digital radio broadcast. Features a radio broadcast receiver. 5. The radio broadcast receiver according to claim 4, wherein the other station information in the data of the radio data multiplex system is another station traffic information. 6. The radio broadcast receiver according to claim 1, wherein the digital radio broadcast reception function side and the radio data multiplex system broadcast reception function side receive different broadcasts. After switching from reception by the reception function side to reception of the same broadcast based on a request for switching to the same broadcast to the digital radio broadcast function side, when the user switches the audio source to the digital radio broadcast side again by the user, A radio broadcast receiver comprising a channel selection control unit for receiving a digital radio broadcast selected immediately before switching to the same broadcast.