JP2015216445A - Broadcast receiver and broadcast receiving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcasting receiver capable of performing automatic follow-up of the same broadcast program, even in a situation where the ID information of a DAB signal and an RDS signal of FM does not match.SOLUTION: A broadcasting receiver includes DAB signal receiving means performing reception processing of the signal of DAB broadcast, RDS signal receiving means performing reception processing of the RDS signal of FM broadcasting, and first automatic follow-up destination determination means for extracting FM broadcasting corresponding to a broadcast program being received via the DAB signal receiving means, based on the RDS information included in the RDS signal, and when a determination is made that it is the same broadcast program by comparing the voice of a broadcast program being received with a voice of an extracted FM broadcasting, determining the FM broadcasting, determined as the same broadcast program, as the FM broadcast station of automatic follow-up destination.

Description

  The present invention relates to a broadcast receiver and a broadcast receiving method capable of receiving DAB (Digital Audio Broadcasting) broadcast and FM broadcast RDS (Radio Data System).

  A broadcast receiver capable of receiving both a DAB signal and an FM RDS signal is known to automatically follow (Service following) the same broadcast program included in the FM broadcast when the DAB signal reception state deteriorates. ing. Specifically, in such a broadcast receiver, the SID (Service Identifier) that is ID information included in the DAB signal and the PI (Program Identifier) that is ID information included in the FM RDS signal, or the DAB signal Automatic tracking is performed based on the included FIG (Fast Information Group) information. The following Patent Document 1 describes an example of a broadcast receiver that performs automatic tracking.

JP 2012-249277 A

  However, the ID information does not always represent accurate information. For example, when the SID and PI are different, the above-described conventional automatic tracking method tracks the fact that the same broadcast program exists in the FM broadcast. It becomes impossible and a situation may occur in which no sound is output.

  The present invention has been made in view of such circumstances, and the object of the present invention is to automatically apply to the same broadcast program even if the DAB signal and the FM RDS signal ID information do not match. To provide a broadcast receiver and a broadcast receiving method capable of following up.

  In order to solve the above-described problems, a broadcast receiver according to one aspect of the present invention is provided with DAB signal receiving means for receiving and processing a DAB broadcast signal, and receiving and processing an RDS signal for FM broadcasting. The FM broadcast corresponding to the broadcast program being received through the RDS signal receiving means and the DAB signal receiving means is extracted based on the RDS information included in the RDS signal, and the audio of the broadcast program being received is extracted. First automatic follow-up destination determining means for determining an FM broadcast determined as the same broadcast program as an automatic follow-up FM broadcast station when it is determined that the same broadcast program is the same by comparing the sound of the FM broadcast With.

  The FM broadcast corresponding to the broadcast program being received is extracted based on the RDS information included in the RDS signal, and the automatic follow-up destination is determined after confirming the same audio. Therefore, even if a situation in which the conventional automatic tracking method becomes impossible to follow, automatic tracking to the same broadcast can be continued.

  The first automatic follow-up destination determining means extracts an FM broadcast station corresponding to the broadcast program being received based on the information on the name of the broadcast program being received and the information on the program name of the FM broadcast included in the RDS information. It may be configured to.

  The first automatic follow-up destination determining means may be configured to extract an FM broadcast having a name that is the same as or similar to the name of the broadcast program being received as an FM broadcast station corresponding to the broadcast program being received. .

  The first automatic follow-up destination determining means is configured to extract an FM broadcast having a PS (Program Service) identical or similar to a DAB broadcast service label as an FM broadcast station corresponding to the broadcast program being received. Also good.

  FM broadcast of the same broadcast program as the broadcast program being received based on at least one of FIG (Fast Information Group) information included in the DAB broadcast signal and the coincidence of DAB broadcast and FM broadcast ID If the second automatic follow-up destination determining means determines the automatic follow-up destination by the second automatic follow-up destination determining means, If not extracted, the FM broadcast may be extracted and an automatic tracking destination may be determined.

  According to another aspect of the present invention, there is provided a broadcast receiver having both a DAB signal receiving means for receiving and processing a DAB broadcast signal and an RDS signal receiving means for receiving and processing an FM broadcast RDS signal. A broadcast receiving method to be executed, an extraction procedure for extracting an FM broadcast corresponding to a broadcast program being received via the DAB signal receiving means based on RDS information included in the RDS signal, and a broadcast program being received Of determining FM broadcast determined to be the same broadcast program as an automatic follow-up FM broadcast station when it is determined that the same broadcast program is the same by comparing the extracted audio and the extracted FM broadcast audio Including.

  The FM broadcast corresponding to the broadcast program being received is extracted based on the RDS information included in the RDS signal, and the automatic follow-up destination is determined after confirming the same audio. Therefore, even if a situation in which the conventional automatic tracking method becomes impossible to follow, automatic tracking to the same broadcast can be continued.

  In the determination procedure, an FM broadcast station corresponding to the broadcast program being received may be extracted based on information on the name of the broadcast program being received and information on the program name of the FM broadcast included in the RDS information.

  In the determination procedure, an FM broadcast having the same or similar name as the name of the broadcast program being received may be extracted as an FM broadcast station corresponding to the broadcast program being received.

  In the determination procedure, an FM broadcast having a PS (Program Service) that is the same as or similar to the DAB broadcast service label may be extracted as an FM broadcast station corresponding to the broadcast program being received.

  FM broadcast of the same broadcast program as the broadcast program being received based on at least one of FIG (Fast Information Group) information included in the DAB broadcast signal and the coincidence of the DAB broadcast and FM broadcast ID In the case where it further includes a second determination procedure for extracting and determining as an automatic tracking destination, the extraction procedure and the determination procedure may be executed on condition that the automatic tracking destination is not extracted in the second determination procedure. .

  Even if a situation in which the conventional automatic tracking method becomes impossible to follow, automatic tracking to the same broadcast program can be continued, and the continuity of automatic tracking to the same broadcast program is increased.

It is a block diagram showing the structure of the broadcast receiver as embodiment of this invention. It is a flowchart showing the service automatic tracking process performed under control by the control part of a broadcast receiver.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a broadcast receiver 1 as an embodiment of the present invention. As shown in FIG. 1, the broadcast receiver 1 of this embodiment includes an FM block 50 that receives and processes an RDS signal of FM broadcasting, a DAB block 60 that receives and processes a DAB signal, and an audio block 70 that performs audio signal processing. . The FM block 50, the DAB block 60, and the audio block 70 are connected to the control unit 14, and the control unit 14 comprehensively controls these blocks. In FIG. 1, the main components of the broadcast receiver are illustrated, and the display unit, operation unit, and the like, which are general components of the broadcast receiver, are shown for convenience of explanation. Omitted.

  The flow of processing when the DAB service is viewed is as follows. The DAB signal received by the antenna 8 is subjected to predetermined processing such as conversion to an intermediate frequency signal by the DAB_RF unit 9 and then input to the DAB decoder 10. The DAB decoder 10 performs demodulation processing on the DAB signal. An audio signal (hereinafter referred to as DAB audio A) obtained by the demodulation process is output as audio from the speaker 7 via the calculation unit 11, the audio source switching unit 13, the audio I / F 5, and the audio amplifier 6.

  Information obtained by the demodulation process (hereinafter referred to as DAB information B) is detected by the signal information / quality detection unit 12 and extracted by the control unit 14. The signal information / quality detection unit 12 detects information related to the quality of the received signal based on, for example, an error rate. Through this process, accompanying information such as a service name is displayed via a display unit (not shown).

  The flow of processing when an FM broadcast RDS is viewed is as follows. The RDS signal received by the antenna 15 is subjected to predetermined processing such as conversion to an intermediate frequency signal by the RDS_RF unit 2 and then input to the RDS demodulation unit 3. The RDS demodulator 3 performs demodulation processing on the RDS signal. An audio signal (hereinafter referred to as RDS audio C) obtained by the demodulation process is output as audio from the speaker 7 via the audio I / F 5 and the audio amplifier 6.

  Information obtained by the demodulation process by the RDS demodulator 3 (hereinafter referred to as RDS information D) is detected by the signal information / quality detector 4 and extracted by the controller 14. The signal information / quality detection unit 4 detects information related to the quality of the received signal based on, for example, an error rate. Through this process, accompanying information such as a service name is displayed via a display unit (not shown).

  The broadcast receiver 1 according to the present embodiment has a function of automatically following the same broadcast program broadcast by FM broadcasting (hereinafter referred to as a service automatic follow-up function) when the reception status of the DAB signal deteriorates. The calculation unit 11 and the audio source switching unit 13 function for the service automatic tracking function. The DAB audio A is input from the DAB decoder 10 to the calculation unit 11, and the RDS audio C is input from the audio I / F 5. The calculation unit 11 has a seamless function of seamlessly connecting the digital sound and the analog sound by correcting the difference between the digital sound and the analog sound, and determines whether the DAB sound A and the RDS sound C match. The determination result by the calculation unit 11 is input to the control unit 14. The audio source switching unit 13 switches between the DAB audio A and the RDS audio C input from the calculation unit 11 in accordance with a control signal from the control unit 14.

  DAB information B, which is information included in the transmission frame of the DAB signal, includes FIG (Fast Information Group) information. FIG information includes FIG 0/6 (type 0 field for extension 6) and FIG 0/21 ( type 0 field for extension 21). FIG 0/6 and FIG 0/21 are service linking information, and include a linkage set number which is identification information indicating which DAB SID and FM PI code are linked. Thereby, the control part 14 can know FM broadcast station which performs the same broadcast as the broadcast station of DAB currently received. Further, a service label (Service Label) representing the name of the service (program name) being received can be acquired from the information of FIG.

  The RDS signal includes a PI code (hereinafter referred to as PI) for identifying an RDS broadcasting station. By PI, it is possible to know the broadcast station of the received RDS signal.

  Hereinafter, the automatic service tracking function will be described in detail. The control unit 14 receives quality information of the DAB broadcast signal from the signal information / quality detection unit 12. When it is determined from this quality information that the reception status of the DAB broadcast signal has deteriorated (for example, when the error rate exceeds a predetermined value), the control unit 14 automatically follows the same broadcast program in the FM broadcast. .

The broadcast receiver 1 confirms and selects the same FM broadcast program as the DAB broadcast program by the following method.
(1) Select target FM broadcast station explicitly specified in FIG 0/6, 0/21 included in DAB information B (2) SID included in DAB information B and included in RDS information D of FM (3) Select the target FM broadcast station based on the relationship between the SID included in the DAB information B and the PI (Region Code) included in the RDS information D of the FM (4) DAB Based on the SID included in the information B and the PS and AF included in the RDS information D of the FM, FM broadcast stations determined to be related are extracted, and finally the same broadcast program is determined by the audio comparison by the calculation unit 11. Determine whether. Note that PS is information (Program Service) representing a broadcast program name, and AF is information representing an alternative broadcast station (Alternative Frequency).

  FIG. 2 is a flowchart showing an automatic service follow-up process executed under the control of the control unit 14 of the broadcast receiver 1. The service automatic tracking process of FIG. 2 may be configured as, for example, a software module that is activated and continuously executed when the broadcast receiver 1 is turned on.

  For example, when a DAB signal is received for a DAB broadcast station designated by the user (step S1), the control unit 14 determines whether or not FIG information (FIG 0/6, 0/21) is included in the DAB information B. Is determined (step S2). If the DAB information B includes FIG information (FIG 0/6, 0/21) (S2: YES), the process proceeds to step S5, and the control unit 14 determines that the FIG information (FIG 0/6, 0 / Select the FM station explicitly specified in 21). Then, the control unit 14 controls the FM block 50 so that the RDS signal of the selected FM broadcast station is received and the RDS sound C is selected when the reception status of the DAB signal deteriorates. The audio source switching unit 13 is controlled (step S9).

  If the DAB information B does not include FIG information (FIG 0/6, 0/21) (S2: NO), the process proceeds to step S3. In step S3, the control unit 14 determines whether there is an FM broadcast station having a PI that matches the SID included in the DAB information, based on the DAB information B and the RDS information D. When there is an FM broadcast station having a PI that matches the SID included in the DAB information (S3: YES), the process proceeds to step S5, and the control unit 14 has an FM having a PI that matches the SID included in the DAB information. Select a broadcast station. Then, the control unit 14 controls the FM block 50 so that the RDS signal of the selected FM broadcast station is received and the RDS sound C is selected when the reception status of the DAB signal deteriorates. The audio source switching unit 13 is controlled (step S9).

  If there is no FM broadcast station having a PI that matches the SID included in the DAB information B (S3: NO), the process proceeds to step S4. In step S4, the control unit 14 determines whether there is an FM broadcast station having a PI that differs only in the DAB SID and the area code. If there is an FM broadcast station that has a PI that differs only in the DAB SID and area code (S4: YES), the process proceeds to step S5, and the control unit 14 has an FM that has a PI that differs only in the DAB SID and area code. Select a broadcast station. Then, the control unit 14 controls the FM block 50 so that the RDS signal of the selected FM broadcast station is received and the RDS sound C is selected when the reception status of the DAB signal deteriorates. The audio source switching unit 13 is controlled (step S9).

  On the other hand, if there is no FM broadcast station having a PI that differs only in the SID of the DAB and the area code (S4: NO), the process proceeds to step S6. In step S6, the control unit 14 determines whether there is an FM broadcast station having a PS that matches or is similar to the DAB service label. If there is an FM broadcast station having a PS that matches or is similar to the DAB service label (S6: YES), the process proceeds to step S7. In determining whether the service label and the program service (PS) are similar, a normal comparison method such as forward matching, backward matching, partial matching, or the like may be used.

  In step S <b> 7, the RDS audio C and DAB audio A of the selected FM broadcast station are compared by the calculation unit 11. Here, an AF (Alternative Frequency) station (such as an AF / EON (Enhanced Other Net's information) station) of the target FM broadcast station may be included in the comparison target. As a result, if the RDS audio C and the DAB audio A match (S7: YES), it is confirmed that they are the same broadcast program. Next, in step S9, when the reception status of the DAB signal deteriorates, the selected FM broadcast station is received (ie, tracking is performed).

  When there is no FM broadcast station having a PS that matches or resembles the DAB service label (S6: NO), or when RDS audio C and DAB audio A do not match (S7: NO) It is assumed that no FM broadcast station exists, and a mute process is performed (step S8).

  With the above configuration, an automatic tracking function with higher continuity than the conventional automatic tracking function is achieved. In particular, even when the information required in the confirmation / selection methods (1) to (3) is not accurate or cannot be obtained, the control unit 14 uniquely matches the service name (service label) of the DAB. An FM broadcast station having a similar broadcast program name (PS) is searched for, and after confirming the same audio by comparing audio, it is determined whether the programs are the same broadcast program. That is, the control unit 14 extracts the FM broadcast corresponding to the DAB broadcast being received based on the RDS information included in the RDS signal, and determines the automatic follow-up destination after confirming the same voice.

  Therefore, even if the identification information (SID) included in the RDS information and the identification information (PI) included in the RDS information are different, the same broadcast program is found, and the continuity of automatic service tracking increases. . In particular, with respect to service linking information that cannot be supported by DAB broadcasting stations, the effects of the above-described embodiments are exhibited. Since the same broadcast program is finally determined by comparing the audio, the possibility of selecting the wrong broadcast service is extremely low.

  The above is the description of the exemplary embodiments of the present invention. Embodiments of the present invention are not limited to those described above, and various modifications are possible within the scope of the technical idea of the present invention. For example, the embodiment of the present application also includes contents appropriately combined with examples and the like clearly shown in the specification or obvious examples.

DESCRIPTION OF SYMBOLS 1 Broadcast receiver 2 RDS_RF part 3 RDS demodulation part 4 Signal information / quality detection part 5 Audio I / F
6 Audio amplifier 9 DAB_RF unit 10 DAB decoder 11 Calculation unit 12 Signal information / quality detection unit 13 Audio source switching unit 50 FM block 60 DAB block 70 Audio block

Claims (10)

A broadcast receiver,
DAB signal receiving means for receiving and processing a DAB broadcast signal;
RDS signal receiving means for receiving and processing RDS signals of FM broadcasting;
The FM broadcast corresponding to the broadcast program being received via the DAB signal receiving means is extracted based on the RDS information included in the RDS signal, and the voice of the broadcast program being received and the extracted FM broadcast are transmitted. A first automatic follow-up destination determination unit that determines an FM broadcast determined as the same broadcast program as an FM track station to be automatically followed when it is determined that the program is the same broadcast program by comparing with audio; A broadcast receiver comprising:   The first automatic follow-up destination determining means is configured to receive an FM corresponding to the broadcast program being received based on information on the name of the broadcast program being received and information on the program name of the FM broadcast included in the RDS information. The broadcast receiver according to claim 1, wherein a broadcast station is extracted.   The first automatic follow-up destination determining means extracts an FM broadcast having a name that is the same as or similar to the name of the broadcast program being received as an FM broadcast station corresponding to the broadcast program being received. The broadcast receiver according to claim 2.   The first automatic follow-up destination determining means extracts an FM broadcast having a PS (Program Service) that is the same as or similar to a service label of the DAB broadcast as an FM broadcast station corresponding to the broadcast program being received. The broadcast receiver according to claim 3. Based on at least one of FIG (Fast Information Group) information included in the DAB broadcast signal and the ID of the DAB broadcast and the FM broadcast, the FM broadcast of the same broadcast program as the broadcast program being received is transmitted. A second automatic follow-up destination determining means for extracting and determining as an automatic follow-up destination;
The first automatic follow-up destination determination unit performs extraction of the FM broadcast and determination of an automatic follow-up destination when an automatic follow-up destination is not extracted by the second automatic follow-up destination determination unit. The broadcast receiver according to any one of claims 1 to 4. A broadcast receiving method executed in a broadcast receiver having both a DAB signal receiving means for receiving and processing a DAB broadcast signal and an RDS signal receiving means for receiving and processing an FM broadcast RDS signal,
An extraction procedure for extracting an FM broadcast corresponding to a broadcast program being received via the DAB signal receiving means based on RDS information included in the RDS signal;
When it is determined that the broadcast program being received is the same broadcast program by comparing the audio of the broadcast program being extracted and the extracted FM broadcast, the FM broadcast determined to be the same broadcast program is automatically tracked. A broadcast receiving method comprising: a determination procedure for determining an FM broadcast station.   In the determination procedure, an FM broadcast station corresponding to the broadcast program being received is extracted based on information related to the name of the broadcast program being received and information related to the program name of the FM broadcast included in the RDS information. The broadcast receiving method according to claim 6.   8. The determination procedure according to claim 7, wherein an FM broadcast having a name that is the same as or similar to a name of the broadcast program being received is extracted as an FM broadcast station corresponding to the broadcast program being received. Broadcast reception method.   9. The determination procedure includes extracting an FM broadcast having a PS (Program Service) that is the same as or similar to a service label of the DAB broadcast as an FM broadcast station corresponding to the broadcast program being received. The broadcast receiving method described in 1. Based on at least one of FIG (Fast Information Group) information included in the DAB broadcast signal and the ID of the DAB broadcast and the FM broadcast, the FM broadcast of the same broadcast program as the broadcast program being received is transmitted. A second determination procedure for extracting and determining as an automatic follow-up destination;
The said extraction procedure and the said determination procedure are performed on the condition that an automatic follow-up destination is not extracted in the said 2nd determination procedure, The one of Claim 6 to 9 characterized by the above-mentioned. Broadcast receiving method.

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