JP2013162162A - Radio receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio receiver capable of raising switching accuracy of broadcasting stations to reduce unnecessary silent states even when types of broadcasting stations in alternate frequency data are wrong.SOLUTION: A radio receiver includes: an AF data acquisition unit 42 which acquires alternate frequency data; an AF selection unit 43 which sets both of nationwide broadcasting stations and local broadcasting stations to switching objects on the basis of the alternate frequency data to select one from among them; a broadcasting station determination unit 44 which determines whether the selected broadcasting station is the nationwide broadcasting station or the local broadcasting station by actually acquiring program identification data; and an AF restriction unit 45 which performs setting for excluding the broadcasting station from the switching objects in the AF selection unit 43 for a predetermined period when it is determined that the selected broadcasting station is the local broadcasting station.

Description

  The present invention relates to a radio receiver such as RDS (Radio Data System).

  Conventionally, an in-vehicle radio receiver that receives AF data (alternative frequency data) by method B of RDS and switches to another broadcast signal having the same content when the reception state of the currently received broadcast signal deteriorates Is known (for example, see Patent Document 1). Broadcast stations of reception frequencies to be switched in this in-vehicle radio receiver include national broadcast stations (national stations and non-local broadcast stations) and local broadcast stations (regional stations and local broadcast stations). A national broadcasting station is a broadcasting station that broadcasts the same program. On the other hand, local broadcasting stations are broadcasting stations of the same series, and the contents of programs are not always the same. In this in-vehicle radio receiver, when the alternative frequency is a frequency of a local broadcasting station, the same broadcast content can be reliably received by prohibiting switching to the alternative frequency.

Japanese Utility Model Publication No. 6-31782

  By the way, in the in-vehicle radio receiver disclosed in Patent Document 1, it is determined whether the alternative frequency is the frequency of the local broadcasting station based on the AF data. In spite of the fact that it is actually a national broadcasting station, or even if the designation by AF data is a national broadcasting station, it may actually be a local broadcasting station. It was not possible to accurately determine whether it was a station. Therefore, the following problems have occurred.

  (1) If a local broadcasting station is determined based on the AF code and this local broadcasting station is excluded from the broadcasting stations to be switched, the national broadcasting is actually performed even if this local broadcasting station is a national broadcasting station with good reception. I can't switch to a station.

  (2) When both the local broadcast station and the national broadcast station included in the AF code are to be switched, the content is confirmed when selecting the local broadcast station (PI code indicating whether or not the content is the same). The output sound needs to be silenced, and if it is really a local broadcasting station, a silent state is wasted.

  (3) Check the contents of local broadcasting stations only once, and if they are really local broadcasting stations, if they are excluded from the subsequent switching targets, they switch between local broadcasting stations and national broadcasting stations at the same frequency. Can't cope with the case.

  The present invention was created in view of the above points, and its purpose is to improve the switching accuracy of broadcasting stations even when the type of broadcasting station in the alternative frequency data is incorrect. Another object of the present invention is to provide a radio receiver that can reduce unnecessary silence.

  In order to solve the above-described problem, the radio receiver according to the present invention includes the first frequency information of the first broadcast station that broadcasts the same program as the broadcast signal being received and the second frequency of the second broadcast station. In a radio receiver that receives a broadcast signal on which alternative frequency data including information is superimposed, broadcast signal receiving means for receiving the broadcast signal, audio output means for outputting sound corresponding to the broadcast signal, and included in the broadcast signal Alternative frequency data acquisition means for acquiring alternative frequency data to be generated, and alternative frequency selection means for setting both the first and second frequency information as switching targets based on the alternative frequency data and selecting one of them And instructing the broadcast signal receiving means to receive the broadcast signal of the frequency selected by the alternative frequency selection means, and determining whether the broadcast station of this frequency is the first broadcast station or the second broadcast station. When the broadcast station determination means and the broadcast station determination means determine that it is the second broadcast station, the frequency information corresponding to the second broadcast station is obtained from the switching target in the alternative frequency selection means. Switching frequency limiting means for performing setting to exclude for a predetermined period.

  Even if the type of the broadcast station (first or second broadcast station) included in the alternative frequency data is incorrect, by including both broadcast stations in the switching target, it is ensured that the first broadcast station It is possible to switch, and the switching accuracy of the broadcasting station can be improved. Further, when the selected broadcast station is the second broadcast station, this broadcast station is excluded from the switching target for a predetermined period, so that this broadcast station is the first broadcast station or the second broadcast station. Since it is not necessary to frequently determine whether there is any, it is possible to reduce time and effort for unnecessary confirmation. Furthermore, by setting the period excluded from the switching target as a predetermined period, the broadcasting station (frequency information) once excluded from the switching target can be returned to the switching target again, and the first broadcast station and the second broadcast station can be returned at the same frequency. Even when the broadcasting station is switched, it is possible to surely switch to the first broadcasting station, and the switching accuracy of the broadcasting station can be further improved.

  Further, the above-described reception state detection means for detecting the reception state of the broadcast signal is further provided, and the alternative frequency selection means has a frequency when the reception state detection means detects that the reception state of the broadcast signal being received has deteriorated. It is desirable to select information. In addition, the reception state detection unit described above detects the reception state of each broadcast signal of the first and second frequency information to be switched, and the alternative frequency selection unit receives the reception state detected by the reception state detection unit. It is desirable to select one of the first and second frequency information with the best. Furthermore, when the broadcast station determination means determines that the broadcast station is the first broadcast station, an instruction to switch the reception frequency based on the frequency information corresponding to the first broadcast station is provided. It is desirable to further comprise a channel selection processing means for performing the above. As a result, when the reception state deteriorates while mounted on a vehicle or the like while moving, it is possible to switch to the broadcast signal of the first broadcasting station with a good reception state and maintain the audio output of the same content program.

  Further, it is desirable that the audio output means described above maintain the output silence state when the determination by the broadcast station determination means is being performed. As a result, it is possible to prevent the sound of different programs from being output in fragments during confirmation of the program contents, and to avoid repeating the silent state of useless output sound.

  Further, the above-described alternative frequency data is preferably included in the broadcast signal of the radio data system. Further, it is desirable that the first broadcasting station is a national broadcasting station and the second broadcasting station is a local broadcasting station. Thereby, it is possible to easily obtain alternative frequency data necessary for performing the operation of the present invention.

  Further, it is desirable that the above-described broadcast station determination means determines whether the broadcast station is the first broadcast station or the second broadcast station by acquiring program identification data included in the broadcast signal. Further, the broadcast station determination means determines whether the broadcast station is the first when the program identification data included in the broadcast signal having the frequency selected by the alternative frequency selection means is the same as the program identification data included in the broadcast signal being received. It is desirable to determine that it is one broadcasting station. Thereby, it is possible to easily determine whether or not they are the same national broadcasting station, that is, whether or not they have the same program content, using the program identification data.

  The broadcast signal receiving means described above preferably has a single tuner configuration for receiving one broadcast signal. As a result, even when a single tuner configuration that cannot perform background processing is adopted, it is possible to switch to a broadcast station of an alternative frequency with high accuracy.

It is a figure which shows the structure of the radio receiver of one Embodiment. It is explanatory drawing of the basic baseband coding structure of RDS data. It is a specific example of an AF list. It is a flowchart which shows the operation | movement procedure which acquires alternative frequency data from the broadcast signal in reception, and switches a channel selection to the national broadcasting station with the same program content, when the receiving condition of this broadcast signal deteriorates. It is explanatory drawing of the operation | movement which acquires alternative frequency data and switches a broadcast station.

  Hereinafter, a radio receiver according to an embodiment to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of a radio receiver according to an embodiment. The radio receiver shown in FIG. 1 is mounted on a vehicle and receives an RDS broadcast, and includes an antenna 10, a front end (F / E) 12, an intermediate frequency amplifier (IFA) 14, an S meter (signal meter). ) 16, demodulator 20, amplifier 22, speaker 24, RS decoder 30, controller 40, AF list storage unit 50, display unit 60, and operation unit 62. This radio receiver has a single tuner configuration for receiving one broadcast signal.

  In RDS broadcasting, 57 kHz, which is the third harmonic of the 19 kHz stereo pilot signal, is used as a subcarrier, and the subcarrier is amplified by a data signal indicating data related to program-related information or traffic information that is filtered and two-phase coded. Radio data (RDS data) is modulated and the amplitude-modulated subcarrier is frequency-modulated to the main carrier and broadcast.

  FIG. 2 is an explanatory diagram of a basic baseband coding structure of RDS data. As shown in FIG. 2, the RDS data is composed of groups of 104 bits as one group, and each group is composed of 4 blocks (A, B, C, D), and each block is a 16-bit information word. (M0 to m15) and 10-bit check words and offset words (C′0 to C′9).

  In block A, program identification data (PI code: Program Identification Code) indicating a network including country name data and program data is arranged. Block B includes traffic information broadcasting station identification data (TP code: Traffic program Identification code) indicating a traffic information broadcasting station that broadcasts a traffic information program, and program content identification data (PTY code: Program) indicating the type of program. Type code) is arranged. In block C, data relating to the frequency of each station in the network station group broadcasting the same program, that is, alternative frequency data (AF data: Alternative Frequency code) is arranged. In this embodiment, it is assumed that alternative frequency data by method B is received. This alternative frequency data includes both the reception frequency of the national broadcasting station that broadcasts the same program as the broadcast signal being received and the reception frequency of the local broadcasting station of the same series, and each reception frequency has two types. The identification information indicating which of the broadcasting stations corresponds is included. In the block D, broadcasting station name data (PS data: Program Service code) such as a broadcasting station name and a network name is arranged.

  The front end 12 extracts a desired broadcast signal from broadcast signals received via the antenna 10 and performs frequency conversion to generate an IF signal (intermediate frequency signal) corresponding to the broadcast wave. The intermediate frequency amplifier 14 amplifies the IF signal output from the front end 12. The S meter 16 detects the signal strength of the IF signal output from the intermediate frequency amplifier 14, that is, the electric field strength of the broadcast signal received by the front end 12.

  The demodulator 20 performs FM demodulation processing and stereo demodulation processing based on the IF signal input from the intermediate frequency amplifier 14. RDS data including program identification data (PI) and alternative frequency data (AF) is superimposed on the data after FM demodulation. The audio signal stereo-demodulated by the demodulator 20 is amplified by the amplifier 22 and an audio sound is output from the speaker 24.

  The RDS decoder 30 performs a predetermined decoding process on the data demodulated by the demodulator 20 and restores the RDS data. Further, the RDS decoder 30 performs an operation of detecting an error in the RDS data while maintaining block synchronization and correcting the error. Normally, RDS data error detection and correction operations are separate from the RDS data decoding process, and a separate error detection / correction unit is provided.

  The control unit 40 controls the entire radio receiver. The control unit 40 includes a CPU, a RAM, a ROM, and the like, and performs various operations by executing a predetermined program. For example, the channel selection operation for selecting and receiving a program, and the alternative broadcast station switching operation for switching to another broadcast station that broadcasts the same content when the reception status of the broadcast signal being received deteriorates are controlled. This is performed under the control of the unit 40. For this purpose, the control unit 40 includes a channel selection processing unit 41, an AF data acquisition unit 42, an AF selection unit 43, a broadcast station determination unit 44, an AF restriction unit 45, and a mute processing unit 46.

  When the received program is designated by the user using the operation unit 62, the channel selection processing unit 41 sets the reception frequency corresponding to the received program to the front end 12. The AF data acquisition unit 42 acquires alternative frequency data (AF data) included in the broadcast signal being received. As described above, this alternative frequency data includes both the reception frequency of the national broadcasting station that broadcasts the same program as the broadcast signal being received and the reception frequency of the local broadcasting station of the same series. Identification information indicating which of the two types of broadcast stations the reception frequency corresponds to is included, and the AF data acquisition unit 42 adds an alternative frequency list (AF List). The created alternative frequency list is stored in the AF list storage unit 50.

  FIG. 3 shows a specific example of the AF list stored in the AF list storage unit 50. As shown in FIG. 2, the AF list includes five items: frequency, type, environment, R flag, and timer setting. “Frequency” is a reception frequency included in the acquired AF data. “Type” is identification information of a broadcast station included in the acquired AF data, where N indicates a national broadcast station and R indicates a local broadcast station. “Environment” indicates the reception state of the broadcast signal of each reception frequency, and is “good”, “equivalent”, “bad” in descending order of the output level of the S meter 16 at a predetermined timing (for example, a constant cycle). Three types are shown. Note that “equivalent” means the same level as the reception state of the broadcast signal being received at that time, and “good” and “bad” indicate better or worse than the reception state of the broadcast signal being received. The “R flag” is set to “1” when it is confirmed that the broadcast station of the reception frequency is a local broadcast station, and “0” is maintained when it is not confirmed. “Timer setting” indicates whether the timer operation is valid / invalid, and the timer operation becomes valid when the R flag is set. At this time, for example, an initial value “60” is set, and thereafter, 1 is counted down every 1 second, and when the value becomes 0, the timer operation becomes invalid “−” again. Specific usage of the “R flag” and “timer setting” will be described later.

  “Content” indicates whether the broadcast station of the reception frequency is actually a national broadcast station or a local broadcast station, N indicates a national broadcast station, and R indicates a local broadcast station. This information is given for explanation and is not included in the actual AF list. Although the identification information (type) indicated by the AF data indicates the national broadcasting station (N), it is actually the local broadcasting station (R), and conversely, the identification information indicates the local broadcasting station (R). It may be a national broadcasting station (N).

  When the reception state of the broadcast signal being received deteriorates (when the output level of the S meter 16 falls below a predetermined value), the AF selection unit 43 has a better reception state than the reception state of the broadcast signal being received. A broadcast signal is selected based on the AF list. From the reception frequencies of all the broadcast stations including the national broadcast station and the local broadcast station, the reception frequency of one broadcast station having a better reception state than the broadcast signal being received is selected.

  The broadcast station determination unit 44 instructs the front end 12 to receive a broadcast signal of the reception frequency selected by the AF selection unit 43, and whether the broadcast station of this frequency is actually a national broadcast station or local broadcast. Determine if it is a station. Specifically, program identification data (PI code) included in the actually received broadcast signal is acquired, and it is checked whether or not the acquired program identification data is the same as the program identification data of the broadcast signal being received. A PI check is performed. If they are the same, it is determined that they are national broadcasting stations, and if they are different, it is determined that they are local broadcasting stations.

  The AF restriction unit 45 excludes the reception frequency corresponding to the local broadcast station from the switching target in the AF selection unit 43 for a predetermined period when the broadcast station determination unit 44 determines that the broadcast station is a local broadcast station. Set up. Specifically, the AF restriction unit 45 sets “R flag” included in the AF list shown in FIG. 3 to “1” and sets “timer setting” to an initial value “60”.

  The mute processing unit 46 sends instructions to the demodulating unit 20 in parallel with the operations of the AF selecting unit 43, the broadcast station determining unit 44, and the AF restricting unit 45 to silence the audio sound output from the speaker 24. To do.

  The above-mentioned antenna 10 and front end 12 are broadcast signal receiving means, intermediate frequency amplifier 14, demodulator 20, amplifier 22 and speaker 24 are audio output means, AF data acquisition section 42 is alternative frequency data acquisition means, AF selection The unit 43 is an alternative frequency selection unit, the broadcast station determination unit 44 is a broadcast station determination unit, the AF limitation unit 45 is a switching frequency limitation unit, the S meter 16 is a reception state detection unit, and the channel selection processing unit 41 is a channel selection unit. Each corresponds to a processing means.

  The radio receiver of this embodiment has such a configuration, and the operation thereof will be described next. FIG. 4 is a flowchart showing an operation procedure for acquiring alternative frequency data from a broadcast signal being received and switching the channel selection to a national broadcast station with the same program content when the reception state of the broadcast signal deteriorates. While one of the broadcast signals is being received when the vehicle is running (step 100), the AF data acquisition unit 42 acquires AF data (alternative frequency data) (step 102), and creates an AF list (alternative frequency list) (step 100). 104). The created AF list is stored in the AF list storage unit 50.

  Next, the AF selection unit 43 performs an AF check for checking the reception state (the output level of the S meter 16) for all reception frequencies included in the AF list (step 106). Based on the result of this AF check, the item “environment” in the AF list is updated. Next, the AF selection unit 43 examines the reception state of the broadcast wave being received (the output level of the S meter 16) and determines whether or not the reception state has deteriorated below a predetermined value (step 108). If it has not deteriorated, a negative determination is made, and the channel selection processing unit 41 determines whether or not the user has operated the operation unit 62 to instruct switching of the broadcast station (step 110). If switching of the broadcasting station is not instructed, a negative determination is made, and the process returns to step 106 and the AF check operation and subsequent steps are repeated. When switching of the broadcasting station is instructed, an affirmative determination is made in the determination in step 110, and the process returns to step 100 to perform the operation of receiving the broadcast wave broadcast signal after switching.

  If the reception state of the broadcast signal being received deteriorates and an affirmative determination is made in the determination in step 108, the AF selection unit 43 then determines that the reception state is “good” from the AF list and the R flag. It is determined whether or not there is a broadcasting station for which is not set (step 112). If a broadcast station having such a condition is not included in the AF list, a negative determination is made, and the process returns to step 106, and the AF check operation and subsequent steps are repeated while maintaining the reception of the current broadcast signal.

  On the other hand, when the broadcasting station having the above condition is included in the AF list, an affirmative determination is made in the determination of step 112. Next, the mute processing unit 46 sends a mute instruction to the demodulating unit 20 to make the audio sound output from the speaker 24 silent (step 114). In addition, the AF selection unit 43 selects a broadcast station that satisfies the condition, sends an instruction to the channel selection processing unit 41, and receives reception frequencies corresponding to the broadcast station (if there are a plurality of reception stations, the reception state is the most among them). A good broadcast station is selected, or one of them is selected according to a predetermined standard (for example, the order of arrangement in the list) in the front end 12, and the broadcast station determination unit 44 receives the newly received broadcast signal. The program identification data (PI code) included in is acquired and PI check is performed (step 116). Then, the broadcast station determination unit 44 determines whether or not the program of the selected broadcast station is the same program (whether or not the selected broadcast station is a national broadcast station) (step 118). In the case of the same program, an affirmative determination is made, and then the mute processing unit 46 sends an instruction to cancel the mute to the demodulating unit 20 to validate the audio sound output from the speaker 24 (step 120). Thereafter, returning to step 100, the reception operation of both signals is performed for the newly selected broadcast station.

  On the other hand, if the result of the PI check is that the program is not the same (in the case of a local broadcasting station), a negative determination is made in the determination at step 118. Next, the AF restriction unit 45 sets the “R flag” in the AF list to “1” and sets “timer setting” to the initial value “60” (step 122). As a result, the R flag is set to “1” for 60 seconds thereafter. Next, the AF restriction unit 45 sets the reception frequency of the original broadcast station to the front end 12 in order to receive the original broadcast signal received in step 100 (step 124), and the mute processing unit 46 Then, the mute release instruction is sent to the demodulator 20 to enable the audio sound output from the speaker 24 (step 126). Thereafter, returning to step 106, the original broadcast signal is received and the AF check operation and subsequent steps are repeated.

  FIG. 5 is an explanatory diagram of an operation of acquiring alternative frequency data and switching between broadcast stations. For example, let us consider a case where the substitute frequency data is acquired during reception of a 94.1 MHz broadcast signal and the AF list shown in FIG. 3 is created.

  In parallel with this broadcast signal reception operation, an AF check (step 106 in FIG. 4) is performed. In the example shown in FIG. 5, when the environment (reception state) of the broadcast signal of 89.1 MHz is good and the reception state of the broadcast signal being received deteriorates (affirmative determination in step 108 of FIG. 4), the broadcast signal of 89.1 MHz The PI check is performed by switching to the broadcast signal (116 in FIG. 4). In the example shown in FIG. 3, this broadcast station has a “type” of N (national broadcast station) in the acquired alternative frequency data, but is actually R (local broadcast station) (in step 118 of FIG. 4). (No determination), the original broadcast signal of 94.1 MHz is received again. In the AF list, the “R flag” corresponding to 89.1 MHz is set to “1”, and “timer setting” is set to the initial value “60”. Accordingly, the state of the R flag is maintained for 60 seconds thereafter, and is excluded from the selection target for performing the PI check. On the other hand, in the obtained alternative frequency data, even when the “type” is R (local broadcasting station) but actually N (national broadcasting station), this received frequency is included in the AF check. Since the PI check (when the reception state is good) is performed, switching to the reception frequency is correctly performed even if the “type” of the alternative frequency data is incorrect.

  As described above, in the radio receiver of this embodiment, even when the type (type) of the broadcasting station included in the alternative frequency data is incorrect, the broadcasting station of both the national broadcasting station and the local broadcasting station is switched. By including it in the target, it is possible to surely switch to the national broadcasting station and improve the switching accuracy of the broadcasting station. In addition, when the selected broadcasting station is a local broadcasting station, it is frequently determined whether this broadcasting station is a national broadcasting station or a local broadcasting station by excluding this broadcasting station from the switching target for a predetermined period. Therefore, it is possible to reduce unnecessary time and effort for confirmation. Furthermore, by setting the period excluded from the switching target as the predetermined period, the broadcasting station once excluded from the switching target can be returned to the switching target again, and the national broadcasting station and the local broadcasting station are switched at the same frequency. However, it is possible to switch to the national broadcasting station without fail, and the switching accuracy of the broadcasting station can be further improved.

  In addition, the mute processing unit 46 maintains the silent state of the output sound during the PI check and the like, thereby preventing the audio of different programs from being output in pieces while checking the program contents. In addition, it is possible to avoid repeating a useless output sound silence state. In addition, even when a single tuner configuration that cannot perform background processing is employed, it is possible to switch to a broadcasting station of an alternative frequency with high accuracy.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, a radio receiver that receives RDS broadcasting has been described. However, other radio receivers, such as a DAB (Digital Audio Broadcasting) receiver, can be used as long as they can receive alternative frequency data. The invention can be applied.

  As described above, according to the present invention, even when the type of the broadcast station (first or second broadcast station) included in the alternative frequency data is incorrect, both broadcast stations are included in the switching target. Thus, it is possible to surely switch to the first broadcasting station and improve the switching accuracy of the broadcasting station.

10 Antenna 12 Front end (F / E)
14 Intermediate Frequency Amplifier (IFA)
16 S meter 30 RS decoder 40 Control unit 41 Channel selection processing unit 42 AF data acquisition unit 43 AF selection unit 44 Broadcast station determination unit 45 AF restriction unit 46 Mute processing unit 50 AF list storage unit 60 Display unit 62 Operation unit

Claims (10)

Receiving the broadcast signal on which alternative frequency data including the first frequency information of the first broadcast station and the second frequency information of the second broadcast station that broadcast the same program as the broadcast signal being received is superimposed; In the radio receiver
Broadcast signal receiving means for receiving a broadcast signal;
Audio output means for outputting audio corresponding to the broadcast signal;
Alternative frequency data acquisition means for acquiring the alternative frequency data included in the broadcast signal;
Based on the alternative frequency data, an alternative frequency selection means for setting both the first and second frequency information as a switching target and selecting one of them,
Whether the broadcast signal receiving means is instructed to receive the broadcast signal having the frequency selected by the alternative frequency selecting means, and whether the broadcast station having this frequency is the first broadcast station or the second broadcast station. Broadcast station determination means for determining
When the broadcast station determination means determines that the broadcast station is the second broadcast station, the frequency information corresponding to the second broadcast station is excluded from the switching target in the alternative frequency selection means for a predetermined period. Switching frequency limiting means for setting,
A radio receiver comprising: In claim 1,
It further comprises reception state detection means for detecting the reception state of the broadcast signal,
The radio frequency receiver, wherein the alternative frequency selection means selects frequency information when the reception state detection means detects that the reception state of the broadcast signal being received has deteriorated. In claim 2,
The reception state detection means detects the reception state of each broadcast signal of the first and second frequency information to be switched,
The radio frequency receiver, wherein the alternative frequency selection means selects one of the first and second frequency information with the best reception state detected by the reception state detection means. In any one of Claims 1-3,
When the broadcast station determination unit determines that the broadcast station is the first broadcast station, the broadcast signal reception unit is instructed to switch the reception frequency based on the frequency information corresponding to the first broadcast station. A radio receiver characterized by further comprising a channel selection processing means to be performed on the radio receiver. In any one of Claims 1-4,
The radio receiver characterized in that the audio output means maintains a silent state of output when the determination by the broadcast station determination means is being performed. In any one of Claims 1-5,
The radio receiver according to claim 1, wherein the alternative frequency data is included in a broadcast signal of a radio data system. In claim 6,
The radio receiver according to claim 1, wherein the first broadcasting station is a national broadcasting station, and the second broadcasting station is a local broadcasting station. In claim 6 or 7,
The broadcast station determination means determines whether the broadcast station is the first broadcast station or the second broadcast station by acquiring program identification data included in a broadcast signal. Radio receiver. In claim 8,
The broadcast station determination means, when the program identification data included in the broadcast signal of the frequency selected by the alternative frequency selection means is the same as the program identification data included in the broadcast signal being received, A radio receiver characterized in that it is determined to be a first broadcasting station. In any one of Claims 1-9,
The radio signal receiver has a single tuner configuration for receiving one broadcast signal.

Images