JP6929120B2 - Broadcast receiver and list creation method - Google Patents

Description

The present invention relates to a broadcast receiver and a list creation method.

Radio broadcasting, in which data related to broadcast programs is multiplexed and transmitted over audio broadcast signals, has been standardized and put into practical use. One of them is known, for example, RDS (Radio Data System: IEC 62106 Edition 2.0, 2009-07) standardized by the European Broadcasting Union. In the RDS system, digital data is multiplexed on the analog FM broadcast signal.

The RDS system multiplex data (hereinafter referred to as "RDS data") includes a PI (Programme Identification) code, a PS (Programme Service Name), and the like. The PI code is a code for identifying a broadcasting station. PS is data for displaying a character string of up to 8 characters. The information displayed by the PS is typically the name of the broadcasting station.

For example, Patent Document 1 describes a specific configuration of a broadcast receiver that receives RDS data. When the broadcast receiver described in Patent Document 1 receives RDS data, it extracts frequency information about receivable broadcasting stations from the received RDS data, and obtains a list of receivable broadcasting stations based on the extracted frequency information. indicate.

Japanese Unexamined Patent Publication No. 2016-111700

In RDS, even if the frequencies are the same, for example, since the service of the affiliated station is broadcast only in a certain time zone, the PI code may be temporarily changed and the broadcast may be performed. In this regard, RDS-enabled broadcast receivers use PI codes to identify broadcast stations. Therefore, the broadcast receiver manages the RDS data before and after the PI code change as the data of another broadcasting station. As a result, the two broadcasting stations (that is, the same broadcasting station name) before the PI code change and after the PI code change are displayed in the list in duplicate. As this type of duplicate display increases, it becomes difficult for the user to properly specify the broadcasting station he / she wants to watch from the list.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a broadcast receiver and a list creation method suitable for reducing duplicate display of the same broadcasting station on a list. be.

The broadcast receiver according to the embodiment of the present invention has a receiver that receives a broadcast signal in a predetermined format in which digital data is multiplexed, and a code corresponding to the broadcast station from the broadcast signal received by the receiver. A decoding unit that decodes the data, a storage unit that stores the code decoded by the decoding unit as broadcast information in association with the broadcast frequency of the broadcast signal, and a creation unit that creates a list using the broadcast information stored in the storage unit. And a display control unit that displays the list created by the creation unit on the display screen of the display device. The creation unit determines that the broadcast information stored in the storage unit is the broadcast information of the same broadcasting station if the broadcasting frequency is the same even if the code is different, and determines that the broadcasting information is the same broadcasting station. Of the two or more broadcast information provided, one broadcast information is registered in the list, and the other broadcast information is not registered in the list.

Further, in one embodiment of the present invention, the creating unit may be configured to register one broadcast information in a list according to a priority order based on a predetermined parameter.

Further, the broadcast receiver according to the embodiment of the present invention may be further provided with a storage unit for storing broadcast information in a preset memory. The above parameters are, for example, parameters indicating whether or not they are stored in the preset memory. In this case, the creation unit preferentially registers the broadcast information stored in the preset memory in the list.

Further, in one embodiment of the present invention, the above-mentioned parameter is, for example, a parameter indicating the receivability of a broadcast frequency by a broadcast receiver. In this case, the creation unit lists broadcast information having a value having a high receivability. Priority is given to registration.

Further, in one embodiment of the present invention, the decoding unit may be configured to decode display information for displaying the name of the broadcasting station from the broadcast signal received by the receiving unit. In this case, the storage unit also stores the display information as broadcast information in association with the broadcast frequency, the creation unit creates a list including the display information, and the display control unit displays the names of the broadcasting stations in a list on the display screen. You may.

Further, in one embodiment of the present invention, when the broadcasting information stored in the storage unit has the same broadcasting frequency but different country codes included in the code corresponding to the broadcasting station, the creating unit may use the same broadcasting information. The configuration may be such that it is determined that the broadcasting information is from a different broadcasting station, and each broadcasting information determined to be the broadcasting information of a different broadcasting station is registered in the list.

Further, in one embodiment of the present invention, the broadcast signal is, for example, a broadcast signal transmitted by the signal format of the RDS system.

Further, the list creation method according to the embodiment of the present invention is a method executed by a computer, and is received in a reception step of receiving a broadcast signal in a predetermined format in which digital data is multiplexed and a reception step. A decoding step of decoding the code corresponding to the broadcasting station from the broadcast signal, a storage step of associating the code decoded in the decoding step with the broadcast frequency of the broadcast signal and storing it as broadcast information in a predetermined storage medium, and storage. It includes a creation step of creating a list using broadcast information stored in a medium, and a display control step of displaying the list created in the creation step on the display screen of the display device. In the creation step, the computer determines that the broadcast information stored in the storage medium is the broadcast information of the same broadcast station if the broadcast frequency is the same even if the code is different, and the broadcast information of the same broadcast station. Of the two or more broadcast information determined to be, one broadcast information is registered in the list, and the other broadcast information is not registered in the list.

According to one embodiment of the present invention, there is provided a broadcast receiver and a list creation method suitable for reducing duplicate display of the same broadcasting station on a list.

It is a block diagram which shows the structure of the broadcast receiver which concerns on one Embodiment of this invention. It is a figure which shows the RDS station DB (FIG. 2 (a)) and non-RDS station DB (FIG. 2 (b)) which concerns on one Embodiment of this invention. It is a flowchart of the list making process executed in one Embodiment of this invention. It is a subroutine of the processing step S12 of FIG. FIG. 3 is a diagram showing a list of records searched as registration candidates in the process step S11 of FIG. 3 (FIG. 5 (a)) and a station list in the process of being created (FIG. 5 (b)) obtained as a result of the execution of the process step S12. be. FIG. 6 is a diagram showing a list of records searched as registration candidates in the process step S13 of FIG. 3 (FIG. 6 (a)) and a station list in the process of being created (FIG. 6 (b)) obtained as a result of the execution of the process step S14. be. FIG. 3 is a diagram showing a list of records searched as registration candidates in the process step S15 of FIG. 3 (FIG. 7 (a)) and a station list in the process of being created (FIG. 7 (b)) obtained as a result of the execution of the process step S16. be. FIG. 3 is a diagram showing a list of records searched as registration candidates in the process step S17 of FIG. 3 (FIG. 8 (a)) and a completed station list (FIG. 8 (b)) obtained as a result of executing the process step S18. be.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, as an embodiment of the present invention, a broadcast receiver suitable for receiving RDS data will be described as an example, but a broadcast receiver suitable for receiving another multiplex broadcasting system is also within the scope of the present invention. Is.

FIG. 1 is a block diagram showing a configuration of a broadcast receiver 1 (computer) according to an embodiment of the present invention. The broadcast receiver 1 according to the present embodiment is, for example, an in-vehicle device mounted on a vehicle traveling on a road, and as shown in FIG. 1, an antenna 102, a tuner 104, a radio signal processing circuit 106, and an audio signal processing circuit. It includes 108, a power amplifier 110, a speaker 112, an RDS demodulator 114, a PLL (Phase Locked Loop) circuit 116, a microcomputer 118, an input interface 120, and a display 122.

Note that FIG. 1 illustrates the main components necessary for the description of the present embodiment, and some components such as a housing, which is a general component for a broadcast receiver, are shown as appropriate. It is omitted.

The broadcast receiver 1 is not limited to the on-board unit. The broadcast receiver 1 is, for example, a portable terminal such as a smartphone, a feature phone, a PHS (Personal Handy phone System), a tablet terminal, a notebook PC, a PDA (Personal Digital Assistant), a PND (Portable Navigation Device), or a portable game machine. There may be.

The broadcast receiver 1 receives the broadcast radio wave with the antenna 102 and outputs it to the tuner 104. The tuner 104 extracts the RF (Radio Frequency) signal of the selected station from the received radio wave under the control of the microcomputer 118 via the PLL circuit 116. The extracted RF signal is frequency-converted to an intermediate frequency suitable for signal processing such as filtering. The tuner 104 outputs an IF (Intermediate Frequency) signal obtained by frequency conversion to the radio signal processing circuit 106.

In this way, the antenna 102, the tuner 104, the PLL circuit 116, and the microcomputer 118 operate as a receiving unit for receiving broadcast radio waves (broadcast signals).

The selected station is designated, for example, by a user operation on the input interface 120. The designated information of the selected station is stored in the internal memory of the microprocessor 118. Immediately after the power of the broadcast receiver 1 is turned on, for example, the microcomputer 118 controls the tuning operation of the tuner 104 via the PLL circuit 116 according to the stored information of the built-in memory.

The input interface 120 is assumed to be hardware or software, or various UIs (User Interfaces) in which they are combined. In the present embodiment, the input interface 120 is provided with a mechanical switch key, a membrane key, a GUI (Graphical User Interface) provided under a touch panel environment, and an operation key mounted on the front panel of the broadcast receiver 1 main body. Includes remote controller, etc.

The radio signal processing circuit 106 includes an AD conversion circuit, an IF-Detection circuit, a noise canceller, and a weak electric field processing (Multiplex) circuit. The IF signal input to the radio signal processing circuit 106 is AD-converted by the AD conversion circuit, detected as an audio signal by the IF detection circuit, and then noise is removed by the noise canceller. The audio signal is processed by the weak electric field processing circuit according to the reception state of the selected station such as mute, high cut, and separation control, and is output to the audio signal processing circuit 108.

The audio signal input to the audio signal processing circuit 108 is output and reproduced as audio from the speaker 112 after undergoing predetermined audio signal processing such as DA conversion and gain adjustment according to the volume by the power amplifier 110.

For example, an S meter is built in the radio signal processing circuit 106. The S meter measures the value of the detection voltage at the time of demodulating the analog audio signal at a predetermined sampling cycle and outputs it to the microcomputer 118. The detection voltage value is a DC voltage (electric field strength of the received broadcast radio wave) proportional to the received radio wave.

The signal detected by the radio signal processing circuit 106 is also output to the RDS demodulator 114. After the demodulation process by the RDS demodulator 114, the detection signal is decoded into RDS data by the RDS decoder 1182 (decoding unit) in the microcomputer 118.

The microprocessor 118 has a data memory 118a. The microprocessor 118 stores the RDS data obtained by decoding in the data memory 118a. The RDS data includes PS (name of broadcasting station), RT (Radio Text), AF (Alternative Frequencies) list, PI code, PTY (Programme Type), TP (Traffic Program) and the like.

The microprocessor 118 has a DB (Database) memory 118b. The RDS station DB and the non-RDS station DB are stored in the DB memory 118b. An example of the RDS station DB and the non-RDS station DB is shown in FIGS. 2 (a) and 2 (b), respectively.

The microcomputer 118 executes the seek process according to the user's operation on the input interface 120 or periodically (for example, every 5 minutes). In the seek process, each frequency channel is sequentially selected, and acquisition of information required for each DB of the RDS station DB and the non-RDS station DB (hereinafter, referred to as “broadcast information”) is attempted.

The RDS station DB is a database related to RDS stations that broadcast RDS data. As shown in FIG. 2A, the RDS station DB has a part of RDS data (PI code and PS), latest order, stationed counter, registration presence / absence, and broadcasting frequency (unit: MHz) for broadcasting the RDS data. It has a record (record of broadcast information of RDS station) that associates various information of. In FIG. 2, a record number is assigned to each record for convenience of explanation.

The "latest order" is a value determined according to the order of the time when the broadcast frequency was last sought in the seek process. The newly seekd broadcast frequency (the seek time is closer to the current time) is assigned a lower number value (for example, 1). It means that the broadcast frequency with the value of the younger number is more likely to be received. That is, the "latest order" is a parameter indicating the receivability of the broadcast frequency.

The “stationary counter” is a value that is incremented by 1 when detected by the seek process and decremented by 1 when it is not detected by the seek process. The maximum value of the stationed counter is, for example, 3, and the minimum value is, for example, zero. The larger the count value of the broadcast frequency, the higher the possibility of reception. As an example, the broadcast frequency at which the stationed counter is 3 is detected in any of the three most recently executed seek processes. That is, the stationed counter is also a parameter indicating the receivability of the broadcast frequency.

The microcomputer 118 has a preset memory 118c. The microcomputer 118 can register a broadcasting station (specifically, broadcasting information of an RDS station and a non-RDS station described later) designated by the user's operation on the input interface 120 in the preset memory 118c. The registration of the broadcast information in the preset memory 118c means that the broadcast information is written (stored) in the preset memory 118c.

In this way, the microcomputer 118 operates as a storage unit for storing broadcast information in the preset memory 118c.

“Registration / non-registration” is a parameter indicating whether or not the broadcast information is registered in the preset memory 118c. In FIG. 2, the broadcast information in which the registration presence / absence field is ◯ is registered in the preset memory 118c. Broadcast information in which the registration presence / absence field is blank is not registered in the preset memory 118c.

The non-RDS station DB is a database related to FM stations that do not broadcast RDS data. Digital data is generally not multiplexed in this type of FM station. Therefore, as shown in FIG. 2B, the non-RDS station DB has a record (record of broadcasting information of the non-RDS station) in which only the stationed counter, the presence / absence of registration, and the broadcasting frequency of the FM station are associated.

In this way, the DB memory 118b operates as a storage unit for storing broadcast information.

The microcomputer 118 creates a station list using the RDS station DB and the non-RDS station DB. The microcomputer 118 stores the created station list in the list memory 118d.

The station list is data that lists various information of PI code, PS, and broadcasting frequency for each broadcasting station in association with each other. The microcomputer 118 displays a station list (more specifically, PS, which is display information) on the display screen of the display 122.

In this way, the microcomputer 118 operates as a creation unit that creates a station list using the RDS station DB and the non-RDS station DB. Further, the microcomputer 118 operates as a display control unit for displaying the PS in the station list on the display screen of the display 122.

The user can select a desired PS (desired station) from the station list displayed on the display screen of the display 122. When the desired station is selected and operated from the station list, the microcomputer 118 selects the broadcast frequency stored in association with the selected desired station, and outputs and reproduces the audio service of the selected desired station from the speaker 112. Let me.

Consider a case where a station list is simply created using the RDS station DB (that is, a list of non-zero stationed counters). As shown in FIG. 2A, the records of record numbers 2, 3 and 8 have the same broadcast frequency (100.4 MHz), but have different PI codes, so they are registered as separate records. Therefore, if the PS of each record is simply used, the PS of these three records will be displayed in duplicate in the station list. The registration of the record means that the broadcast information constituting the record is written (stored) in the DB memory 118b.

Therefore, in the broadcast receiver 1 according to the present embodiment, in order to reduce this kind of duplicate display, the list creation (update) process described below is executed.

[List creation process]
FIG. 3 is a flowchart of the list creation process executed by the microcomputer 118. The microcomputer 118 executes the list creation process according to the user's operation on the input interface 120 or periodically. At the start of execution of the list creation process, the microcomputer 118 deletes the station list stored in the list memory 118d or temporarily uses another memory (for example, temporarily only for a period until the list creation process is completed). Keep it as a backup).

[S11 in FIG. 3 (search for registration candidates)]
In this processing step S11, registration candidates in the station list are searched in the order of "latest order" in the RDS station DB. In this processing step S11, a record in the RDS station DB whose registration presence / absence field is ◯ (that is, the RDS station registered in the preset memory 118c) is searched as a registration candidate. The registration in the station list means that the broadcast information itself or its link (address of the DB memory 118b) constituting the list is written (stored) in the list memory 118d.

FIG. 5A shows a list of records searched as registration candidates in the present processing step S11. In the present embodiment, as shown in FIG. 5A, the records of record numbers 1, 3, and 8 are searched as registration candidates.

[S12 (list registration process) in FIG. 3]
In the present processing step S12, the registration process to the station list is executed using the records searched as the registration candidates in the processing step S11 (search for registration candidates). FIG. 4 shows a subroutine of list registration processing.

-Processing step S12a of FIG.
In the present processing step S12a, it is determined whether or not the processing steps S12b and subsequent steps have been executed for all the records searched as registration candidates in the processing step S11 (search for registration candidates). When it is determined that there are records that have not been executed after the processing step S12b (S12a: NO), the target records are selected from the unprocessed records in the order of "latest order", and the selected target records are selected. The processing steps S12b and subsequent steps are executed.

In the present embodiment, the processing steps S12b and subsequent steps are executed in the order of record number 3 (latest order = 2), record number 1 (latest order = 6), and record number 8 (latest order = 7). When the execution of the processing steps S12b and subsequent steps for these three records is completed (S12a: YES), this subroutine ends, and the processing steps S13 and subsequent steps of FIG. 3 are executed.

-Processing step S12b of FIG.
In the present processing step S12b, it is determined whether or not the stationed counter is other than zero (that is, 1 to 3) for the target record selected in the processing step S12a, in short, whether or not the reception possibility is high. Will be done.

When the stationed counter of the target record is determined to be zero (S12b: NO), it is difficult to receive the broadcast frequency of the target record. Therefore, the processing step of this flowchart returns to the processing step S12a without registering the broadcast information of the target record in the station list. When it is determined that the stationed counter of the target record is any of 1 to 3 (S12b: YES), the processing step of this flowchart proceeds to processing step S12c.

-Processing step S12c of FIG.
In this processing step S12c, it is determined whether or not the broadcast information of the same broadcasting station as the broadcast information of the target record is already registered in the station list.

When it is determined in the present processing step S12c that the broadcast information of the same broadcasting station as the broadcast information of the target record is already registered in the station list (S12c: YES), the broadcast information of the target record is registered in the station list. Without this, the processing step of this flowchart returns to the processing step S12a. When it is determined that the broadcast information of the same broadcasting station as the broadcast information of the target record is not registered in the station list (S12c: NO), the processing step of this flowchart proceeds to the processing step S12d.

-Processing step S12d of FIG.
In this processing step S12d, the broadcasting information (PI code, PS, broadcasting frequency) of the target record determined to be unregistered in the processing step S12c is registered in the station list. When the broadcast information of the target record is registered in the station list, the processing step of this flowchart returns to the processing step S12a.

FIG. 5B exemplifies a station list in the process of being created as a result of executing the present processing step S12.

The record with the record number 3 has a stationed counter of 3 (S12b: YES). Further, at the time of executing the process step S12 (list registration process) for the record number 3, no broadcast information is registered in the station list (S12c: NO). Therefore, the broadcast information of record number 3 is registered in the station list (see list number 0 in FIG. 5B).

The record with record number 1 has a stationed counter of 2 (S12b: YES). Further, at the time of executing the processing step S12 (list registration processing) for the record number 1, the broadcasting information having a broadcasting frequency of 103.8 MHz is not registered (S12c: NO). Therefore, the broadcast information of record number 1 is registered in the station list (see list number 1 in FIG. 5B).

The record number 8 has a stationed counter of 2 (S12b: YES). On the other hand, at the time of executing the process step S12 (list registration process) for the record number 8, the broadcast information having a broadcast frequency of 100.4 MHz (broadcast information of the list number 0) has already been registered.

Specifically, the PI code of the record number 8 is "C8A1", whereas the PI code of the list number 0 (record number 3) is "C2A1". Since the two have different PI codes, they are registered as separate records in the RDS station DB. However, since both have the same broadcasting frequency, they are actually broadcast information of the same broadcasting station.

Therefore, in the present embodiment, if the broadcasting frequencies are the same even if the PI codes are different, it is considered to be the broadcasting information of the same broadcasting station. Therefore, for record number 8, it is determined that the broadcast information of the same broadcasting station (broadcast information of list number 0) is already registered in the station list (S12c: YES), and the broadcast information is not registered in the station list (FIG. FIG. 5 (b)).

In addition, in the present embodiment, the broadcast information (broadcast information of record number 1) having a higher receivable value than the broadcast information of record number 8 is preferentially registered in the station list.

In this way, the microcomputer 118 determines that the broadcast information stored in the DB memory 118b is the broadcast information of the same broadcasting station if the broadcasting frequency is the same even if the PI code is different, and the same broadcasting is performed. Of two or more broadcast information determined to be station broadcast information, one broadcast information is registered in the station list, and the other broadcast information is not registered in the station list (other broadcast information is subject to registration in the station list). Exclude from.).

[S13 in FIG. 3 (search for registration candidates)]
In this processing step S13, registration candidates in the station list are searched in the order of "latest order" in the non-RDS station DB. In this processing step S13, a record in which the registration presence / absence field is ◯ in the non-RDS station DB (that is, the non-RDS station registered in the preset memory 118c) is searched as a registration candidate.

FIG. 6A shows a list of records searched as registration candidates in the present processing step S13. In the present embodiment, as shown in FIG. 6A, the record with the record number 13 is searched as a registration candidate.

[S14 (list registration process) in FIG. 3]
In the present processing step S14, the broadcast information of the record searched as the registration candidate in the processing step S13 (search for registration candidate) is registered in the station list. If the stationed counter is zero, the record is not registered in the station list.

FIG. 6B exemplifies a station list in the process of being created as a result of executing the present processing step S14. The record number 13 has a stationed counter of 3. Therefore, as shown in FIG. 6B, the broadcast information of the record number 13 is registered in the station list.

[S15 in FIG. 3 (search for registration candidates)]
In this processing step S15, registration candidates in the station list are searched in the order of "latest order" in the RDS station DB. In this processing step S15, a record in which the registration presence / absence field is blank in the RDS station DB (that is, an RDS station that is not registered in the preset memory 118c) is searched as a registration candidate.

FIG. 7A shows a list of records searched as registration candidates in the present processing step S15. In the present embodiment, as shown in FIG. 7A, the records of record numbers 0, 2, 4 to 7, 9, and 10 are searched as registration candidates.

[S16 (list registration process) in FIG. 3]
In the present processing step S16, the registration process to the station list is executed using the records searched as the registration candidates in the processing step S15 (search for registration candidates). The registration process executed here is the same as the process step S12 (list registration process). For the sake of avoiding duplicate explanations, the specific description of the present processing step S16 will be omitted.

FIG. 7B exemplifies a station list in the process of being created as a result of executing the present processing step S16. Here, a description will be given with reference to the subroutine of FIG.

The record with record number 0 has a stationed counter of 3 (S12b: YES). Further, at the time of executing the processing step S16 (list registration processing) for the record number 0, the broadcasting information having a broadcasting frequency of 104.5 MHz is not registered (S12c: NO). Therefore, the broadcast information of record number 0 is registered in the station list (see list number 3 in FIG. 7B).

The record with record number 5 has a stationed counter of 3 (S12b: YES). On the other hand, at the time of executing the process step S16 (list registration process) for the record number 5, the broadcast information having a broadcast frequency of 103.8 MHz (broadcast information of the list number 1) has already been registered. Therefore, regarding the record number 5, it is determined that the broadcast information of the same broadcasting station is already registered in the station list (S12c: YES), and the broadcast information is not registered in the station list (see FIG. 7B).

The record with record number 5 has a larger value of the stationed counter than the list number 1 (record with record number 1) having the same broadcast frequency of 103.8 MHz. However, in the present embodiment, the broadcast information registered in the preset memory 118c is prioritized over the broadcast information having a large value of the stationed counter. Therefore, the broadcast information of the list number 1 (record number 1) is registered in the station list, and the broadcast information of the record number 5 is not registered in the station list. In another embodiment, the broadcast information having a large value of the stationed counter may be preferentially registered in the station list.

The record number 7 has a stationed counter of 3 (S12b: YES). Further, at the time of executing the processing step S16 (list registration processing) for the record number 7, the broadcasting information having a broadcasting frequency of 92.6 MHz is not registered (S12c: NO). Therefore, the broadcast information of record number 7 is registered in the station list (see list number 4 in FIG. 7B).

The record number 10 has a stationed counter of 3 (S12b: YES). Further, at the time of executing the processing step S16 (list registration processing) for the record number 10, the broadcasting information having a broadcasting frequency of 103.3 MHz is not registered (S12c: NO). Therefore, the broadcast information of record number 10 is registered in the station list (see list number 5 in FIG. 7B).

The record number 9 has a stationed counter of 2 (S12b: YES). Further, at the time of executing the processing step S16 (list registration processing) for the record number 9, the broadcasting information having a broadcasting frequency of 106.2 MHz is not registered (S12c: NO). Therefore, the broadcast information of record number 9 is registered in the station list (see list number 6 in FIG. 7B).

The record number 2 has a stationed counter of 1 (S12b: YES). On the other hand, at the time of executing the process step S16 (list registration process) for the record number 2, the broadcast information having a broadcast frequency of 100.4 MHz (broadcast information of the list number 0) has already been registered. Therefore, for record number 2, it is determined that the broadcast information of the same broadcasting station is already registered in the station list (S12c: YES), and the broadcast information is not registered in the station list (see FIG. 7B).

The record number 6 has a stationed counter of 1 (S12b: YES). On the other hand, at the time of executing the process step S16 (list registration process) for the record number 6, the broadcast information having a broadcast frequency of 103.3 MHz (broadcast information of the list number 5) has already been registered. Therefore, for record number 6, it is determined that the broadcast information of the same broadcasting station is already registered in the station list (S12c: YES), and the broadcast information is not registered in the station list (see FIG. 7B).

The record number 4 has a stationed counter of zero (S12b: NO). Since it is unlikely that the record number 4 can be received, the broadcast information is not registered in the station list (see FIG. 7B).

[S17 in FIG. 3 (search for registration candidates)]
In this processing step S17, registration candidates in the station list are searched in the order of "latest order" in the non-RDS station DB. In this processing step S17, a record in which the registration presence / absence field is blank in the non-RDS station DB (that is, a non-RDS station that is not registered in the preset memory 118c) is searched as a registration candidate.

FIG. 8A shows a list of records searched as registration candidates in the present processing step S17. In the present embodiment, as shown in FIG. 7A, the records of record numbers 11 and 12 are searched as registration candidates.

[S18 (list registration process) in FIG. 3]
In the present processing step S18, the broadcast information of the record searched as the registration candidate in the processing step S17 (search for registration candidate) is registered in the station list. When the execution of the processing step S18 is completed, the station list is completed.

FIG. 8B exemplifies a station list (completed version) obtained as a result of executing the present processing step S18. Each of the records of record numbers 11 and 12 has a stationed counter of 3. Therefore, as shown in FIG. 8B, the broadcast information of the record numbers 11 and 12 is registered in the station list. This completes the station list.

As shown in FIG. 8B, broadcast information having the same broadcast frequency (that is, broadcast information of the same broadcast station) is not registered in the station list. Therefore, duplicate display of the same broadcasting station is eliminated. This makes it easier for the user to appropriately specify the broadcasting station he / she wants to watch from the station list.

PS (typically, a broadcasting station name), which is display information, is displayed on the display screen of the display 122. In the example of FIG. 8B, there are three "BBC 3CR" and two "Heart". In order to improve convenience when the user designates a broadcasting station, for example, the same PS may be displayed with a branch number (for example, "BBC 3CR-1", "BBC 3CR-2", etc.).

The display screen of the display 122 may display not only the PS but also the PI code and the broadcasting frequency.

The above is the description of the exemplary embodiment of the present invention. The embodiments of the present invention are not limited to those described above, and various modifications can be made within the scope of the technical idea of the present invention. For example, the embodiment of the present application also includes the content obtained by appropriately combining examples and the like or obvious examples and the like as exemplified in the specification.

The first digit of the PI code is the country code. In the above embodiment, the case where the station list is created from the data of the RDS station whose country code is all "C" (that is, the same country) is illustrated. Here, consider a case where a vehicle equipped with the broadcast receiver 1 travels near the border. In this case, by executing the seek process, data of RDS stations having the same broadcast frequency may be sought and stored in the RDS station DB, although the country code is different. As an example, data having the following information is stored in the RDS station DB.
(1) PI code: C2A1 PS: Classic Frequency: 100.4 MHz
(2) PI code: D2A1 PS: Heart Frequency: 100.4 MHz

If the country code is different, different services may be broadcast even if the broadcast frequency is the same. In this case, in the processing step S12c of FIG. 4, NO determination may be made as exception processing.

That is, even if the broadcast information registered in the station list includes the broadcast information of the target record and the broadcast information having the same broadcast frequency, if the country codes are different from each other, the broadcasts of different broadcast stations are broadcast. It is considered to be information. Therefore, in the processing step S12c of FIG. 4, it is determined that the broadcast information of the same broadcasting station as the broadcast information of the target record is not registered in the station list. As a result, for example, both (1) and (2) above are registered in the station list. By executing this exception handling, it becomes possible to register the broadcast information of different broadcasting stations having the same broadcasting frequency in the station list.

1 Broadcast receiver 102 Antenna 104 Tuner 106 Radio signal processing circuit 108 Audio signal processing circuit 110 Power amplifier 112 Speaker 114 RDS demodulator 116 PLL circuit 118 Microcomputer 118a RAM for data
118b DB RAM
118c Preset memory 118d List memory 120 Input interface 122 Display 1182 RDS decoder

Claims (13)

A receiver that receives broadcast signals in a predetermined format in which digital data is multiplexed,
A decoding unit that decodes the code corresponding to the broadcasting station from the broadcasting signal received by the receiving unit, and
A storage unit that stores the code decoded by the decoding unit as broadcast information in association with the broadcast frequency of the broadcast signal, and a storage unit.
A creation unit that creates a list using the broadcast information stored in the storage unit, and
A display control unit that displays the list created by the creation unit on the display screen of the display device,
With
The creation part
Regarding the broadcast information stored in the storage unit, if the broadcast frequencies are the same even if the codes are different, it is determined that the broadcast information is the same broadcast station.
Of the two or more broadcast information determined to be the broadcast information of the same broadcasting station, one broadcast information is registered in the list, and the other broadcast information is not registered in the list.
Broadcast receiver. The creation part
Register the one broadcast information in the list according to the priority based on a predetermined parameter.
The broadcast receiver according to claim 1. A storage unit for storing the broadcast information in the preset memory is further provided.
The parameters are
It is a parameter indicating whether or not it is stored in the preset memory.
The creation part
Broadcast information stored in the preset memory is preferentially registered in the list.
The broadcast receiver according to claim 2. The parameters are
It is a parameter indicating the receivability of the broadcast frequency by the broadcast receiver.
The creation part
The broadcast information having a high receivable value is preferentially registered in the list.
The broadcast receiver according to claim 2 or 3. The decoding unit
From the broadcast signal received by the receiver, the display information for displaying the name of the broadcast station is decoded.
The storage unit is
The display information is also stored as broadcast information in association with the broadcast frequency.
The creation part
Create a list containing the above display information
The display control unit
List the names of the broadcasting stations on the display screen.
The broadcast receiver according to any one of claims 1 to 4. The creation part
Regarding the broadcast information stored in the storage unit, if the broadcast frequency is the same but the country code included in the code is different, it is determined that the broadcast information is broadcast information of a different broadcasting station.
Each broadcast information determined to be broadcast information of the different broadcasting station is registered in the list.
The broadcast receiver according to any one of claims 1 to 5. The broadcast signal is
A broadcast signal transmitted by the RDS (Radio Data System) signal format.
The broadcast receiver according to any one of claims 1 to 6. A list-making method performed by a computer
A reception step in which digital data is multiplexed to receive a broadcast signal in a predetermined format, and
A decoding step that decodes the code corresponding to the broadcasting station from the broadcast signal received in the reception step, and
A storage step in which the code decoded in the decoding step is associated with the broadcast frequency of the broadcast signal and stored as broadcast information in a predetermined storage medium, and
A creation step of creating a list using the broadcast information stored in the storage medium, and
A display control step for displaying the list created in the creation step on the display screen of the display device, and
Including
In the creation step
Regarding the broadcast information stored in the storage medium, if the broadcast frequencies are the same even if the codes are different, it is determined that the broadcast information is the same broadcast station.
Of the two or more broadcast information determined to be the broadcast information of the same broadcasting station, one broadcast information is registered in the list, and the other broadcast information is not registered in the list.
How to create a list. In the creation step
Register the one broadcast information in the list according to the priority based on a predetermined parameter.
The list creation method according to claim 8. Further including a storage step of storing the broadcast information in the preset memory,
The parameters are
It is a parameter indicating whether or not it is stored in the preset memory.
In the creation step
Broadcast information stored in the preset memory is preferentially registered in the list.
The list creation method according to claim 9. The parameters are
It is a parameter indicating the receivability of the broadcast frequency by the computer.
In the creation step
The broadcast information having a high receivable value is preferentially registered in the list.
The method for creating a list according to claim 9 or 10. In the decoding step
From the broadcast signal received in the reception step, the display information for displaying the name of the broadcasting station is decoded.
In the storage step
The display information is also stored in the storage medium as broadcast information in association with the broadcast frequency.
In the creation step
Create a list containing the above display information
In the display control step
List the names of the broadcasting stations on the display screen.
The list creation method according to any one of claims 8 to 11. In the creation step
Regarding the broadcast information stored in the storage medium , if the broadcast frequency is the same but the country code included in the code is different, it is determined that the broadcast information is broadcast information of a different broadcasting station.
Each broadcast information determined to be broadcast information of the different broadcasting station is registered in the list.
The list creation method according to any one of claims 8 to 12.

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