JP2017069929A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver capable of improving reception quality by reducing a frequency of suspension of service being received, the suspension being caused by interruption by road traffic information.SOLUTION: A digital broadcast receiver comprises: a reception service setting unit 32 that, according to a user's operation, sets a service to be received; a service reception processing unit 34, RF unit 12, decoder 16, etc. that receive the service and output a content of the service; a monitoring target service determination unit 36 that, depending on a reception history of the service to be received, determines a specific service to be monitored, the specific service being part of a plurality of services; a traffic information reception determination unit 38 that, during reception of the service to be received, determines the presence/absence of reception of road traffic information included in the specific service to be monitored; and a traffic information output processing unit 40 that, when it is determined by the traffic information reception determination unit 38 that road traffic information has been received, inserts the road traffic information into the service being received before outputting the service.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a digital broadcast receiver that acquires and outputs road traffic information during normal program reception.

  Conventionally, the content of the high-speed information channel portion included in the DAB signal being received is analyzed, and the service specified in the DAB signal being received and the service included in another DAB signal not being received are specified by the user. Check if the announcement is supported and if so, whether the announcement is broadcast, and if the type of announcement specified by the user is broadcast, the announcement (1) Display that the announcement is not currently being broadcast on the display, or (2) If broadcast is not being broadcast, start broadcasting A DAB receiver is known that receives the announcement and outputs the sound when it is received (see, for example, Patent Document 1). . By specifying road traffic information as an announcement in this DAB receiver, even if the service being received does not include an announcement of road traffic information, broadcasting of road traffic information is started with other services. Then, the contents can be displayed.

JP-A-10-126293

  By the way, in the DAB receiver disclosed in Patent Document 1 described above, an interrupt is generated when the road traffic information as an announcement included in another service is received and the content is output. If there are many road traffic information included in these, listening to the program being received will be interrupted frequently, making the content difficult to listen and reducing the quality of service There was a problem.

  The present invention was created in view of the above points, and an object of the present invention is to provide digital broadcasting capable of improving reception quality by reducing the frequency of service interruption during reception due to interruption of road traffic information. To provide a receiver.

  In order to solve the above-described problems, a digital broadcast receiver according to the present invention includes a reception service setting unit that sets a service to be received from a plurality of services according to a user's operation, and a reception service setting unit. A service reception unit that receives a service set as a reception target and outputs the contents thereof, and is a part of a plurality of services and is a monitoring target according to a reception history of the service to be received by the service reception unit Whether or not road traffic information included in the monitored specific service determined by the monitored service determining means is received while receiving the service to be received by the monitored service determining means for determining the specific service and the service receiving means. The traffic information reception determination means for determining and the determination that the road traffic information has been received by the traffic information reception determination means When we, and an traffic information output means for outputting by interrupting the road traffic information during reception of the received target service by the service receiving device.

By making a specific service for determining whether or not road traffic information is received as a part of a plurality of services, the frequency of interruption of a service being received due to an interruption of road traffic information can be reduced, and reception quality can be improved. The plurality of services described above are preferably included in one ensemble of DAB broadcasting. As a result, it is possible to receive a service and monitor the reception of road traffic information in other services using one tuner, and the configuration of the digital broadcast receiver can be simplified.

  In addition, the reception history described above includes at least the number of past receptions of the service received by the service receiving unit, and the monitored service determining unit determines a predetermined number of services with a large number of receptions as a specific service. Is desirable. In particular, it is desirable that the monitoring target service determining unit described above determines a service including road traffic information as a specific service. As a result, road traffic information included in services that are frequently used on a daily basis can be acquired during reception of other services.

  Further, when the traffic information is not included in the service to be received by the service receiving unit described above, it is desirable that the traffic information output unit interrupts the road traffic information. As a result, even when a service in which road traffic information is not distributed is being received, the road traffic information can be reliably acquired.

It is a figure which shows the structure of the digital broadcast receiver of one Embodiment. It is a figure which shows the frame structure of a DAB broadcast signal. It is a figure which shows the specific example of the reception log | history produced and updated by the reception log | history creation / update part. It is a flowchart which shows the operation | movement procedure which outputs road traffic information during service reception.

  Hereinafter, a digital broadcast 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 digital broadcast receiver according to an embodiment. For example, this digital broadcast receiver is for receiving a digital broadcast signal according to the DAB broadcast standard (DAB / T-DMB broadcast standard) mainly used in Europe. The digital broadcast receiver is mounted on a vehicle.

  As shown in FIG. 1, the digital broadcast receiver according to the present embodiment includes an RF unit 12, an analog-digital converter (A / D) 14, a decoder 16, an output processing unit 18, an amplifier 20, a speaker 22, and a control unit 30. , A display unit 60 and an operation unit 70 are provided.

  FIG. 2 is a diagram showing a frame structure of a digital broadcast signal according to the DAB / T-DMB broadcast standard. As shown in FIG. 2, the frame is composed of a synchronization channel, a first information channel FIC, and a main service channel MSC.

  The synchronization channel is composed of a NULL symbol and a phase reference symbol PRS (Phase Reference Symbol), and is used for frame synchronization by detecting the head portion of the frame. The first information channel FIC is an area for explaining the contents of the main service channel MSC, and includes time / date data, service (program) arrangement data, service label (name), service identification code SID (Service Identification). Code). A plurality of FIGs (first information groups) are energy-spread to form one FIB (first information block) which is a predetermined information unit. Each FIB is convolutionally encoded, and the three FIBs subjected to the convolutional coding constitute one FIC. The main service channel MSC mainly includes voice data corresponding to each of a plurality of services. The main service channel MSC includes a plurality of sub-channels (SubCh) that are energy spread, convolutionally encoded, and time interleaved.

  In this embodiment, it is necessary to determine whether each service supports road traffic information that is one of announcements, and if it is supported, whether road traffic information is being broadcast. These determinations are made based on the announcement support information FIG0 / 18 and the announcement switch information FIG0 / 19 included in the FIC described above. For example, whether or not each service included in the DAB signal supports road traffic information that is one of the announcements can be determined by examining the contents of the announcement support information FIG0 / 18. In addition, when each service supports road traffic information, whether this road traffic information is currently being broadcast, whether the road traffic information being broadcast is new or repeated, etc. This can be determined by examining the contents of the announcement switch information FIG0 / 19.

  The RF unit 12 converts a digital broadcast signal (DAB signal) corresponding to one ensemble received via the antenna 10 into an intermediate frequency signal. The analog-digital converter 14 converts an analog intermediate frequency signal into digital data (intermediate frequency data). The decoder 16 performs demodulation processing and decoding processing on the intermediate frequency data to generate voice data for each service, and various kinds of announcement support information FIG0 / 18 and announcement switch information FIG0 / 19 described above. Extract information necessary for judgment and control. A digital broadcast signal (first digital signal) broadcast by one broadcast station in a multicarrier scheme using OFDM (Orthogonal Frequency Division Multiplexing) as a modulation scheme by the RF unit 12, the analog-digital converter 14, and the decoder 16. (Broadcast signal) is received, demodulation processing and decoding processing are performed, and audio data corresponding to one service included in the main service channel MSC is reproduced.

  The output processing unit 18 receives the audio data output from the decoder 16, and performs variable control of the volume of the audio data, overlay processing of other sounds (for example, operation sounds), and the like. The amplifier 20 amplifies the audio data output from the output processing unit 18 and outputs the amplified audio from the speaker 22. Actually, it is necessary to convert the audio data after the various processes in the output processing unit 18 into an analog audio signal. This conversion processing may be performed in the output processing unit 18 or may be performed by providing a digital-analog converter in the subsequent stage of the output processing unit 18.

  The control unit 30 controls the reception operation of the entire digital broadcast receiver, and acquires and outputs road traffic information included in another specific service in parallel with the reception operation of one service set as a listening target. Interrupt processing is performed. Details of the control unit 30 will be described later.

  The display unit 60 displays an operation screen indicating an operation state of the digital broadcast receiver, an operation screen for performing various operations, and the like. The operation unit 70 is for a user to give an operation instruction, and includes various operation keys and operation knobs. An instruction to change the volume by the user, an instruction to switch the service to be received, and the like are performed using the operation unit 70.

  In addition, the control unit 30 described above receives a reception service setting unit 32, a service reception processing unit 34, a monitoring target service determination unit 36, a traffic information reception determination unit 38, and a traffic information output in order to perform the road traffic information interruption process. A processing unit 40 and a reception history creation / update unit 50 are provided.

  The reception service setting unit 32 sets a service to be received from a plurality of services included in the ensemble according to a user operation using the operation unit 70.

  The service reception processing unit 34 sends an instruction to the decoder 16 to specify a service to be processed, thereby performing reception processing for the service set as the reception target by the reception service setting unit 32. The decoder 16 outputs audio data corresponding to the service.

  The monitoring target service determination unit 36 determines a specific service that is a part of a plurality of services included in the ensemble and is a monitoring target, according to the reception history of the service that is the target of the reception process by the service reception processing unit 34. . A specific example of determining this specific service will be described later.

  Whether the traffic information reception determination unit 38 receives the road traffic information included in the specific service to be monitored determined by the monitoring target service determination unit 36 while the service reception processing unit 34 is receiving the service currently being received. Determine.

  When the traffic information reception determination unit 38 determines that the road traffic information has been received, the traffic information output processing unit 40 interrupts the road traffic information into the service being received by the service reception processing unit 34. Process to output. Actually, when it is determined that the reception of the road traffic information is started, the traffic information output processing unit 40 sends an instruction to switch the reception target to the service including the road traffic information to the decoder 16. . The decoder 16 switches the reception target from the service that has been received so far to another service that includes road traffic information, and includes voice data and display data corresponding to the road traffic information (specifically, this road traffic information is included) (Which is determined by the broadcasting station providing the service).

  The reception history creation / update unit 50 creates and updates a reception history of a service that is a target of reception processing by the service reception processing unit 34.

  FIG. 3 is a diagram showing a specific example of the reception history created and updated by the reception history creation / update unit 50. In the example illustrated in FIG. 3, the ensemble A includes seven services 1 to 7. Among these seven services 1 to 7, services 1, 3-5, and 7 correspond to TP stations that are broadcasting stations that support road traffic information as announcements, and other services 2 and 6 Corresponds to a noTP station which is a broadcasting station that does not support road traffic information as an announcement.

  The reception history creation / update unit 50 creates and updates the reception history by accumulating the number of receptions for each of the services 1, 3-5, and 7 corresponding to the TP stations. For example, every time the digital broadcast receiver is turned on, the past number of receptions as the reception history (the number of times the service has been listened to) is read out, 1 is added, and the value after this addition is the number of times received so far. The reception history is updated by overwriting to. In the example illustrated in FIG. 3, the number of receptions corresponding to service 1 (the number of previous listenings) is 2, the number of receptions corresponding to service 3 is 10, the number of receptions corresponding to service 4 is 30, and the service 5 is supported. The number of receptions is 5, and the reception history corresponding to the service 7 is 7. The number of receptions of the service 4 broadcast is the largest.

  The reception service setting unit 32 described above is the reception service setting unit, and the service reception processing unit 34, the RF unit 12, the analog-digital converter 14, the decoder 16, the output processing unit 18, the amplifier 20, and the speaker 22 are the service reception unit. The monitoring target service determination unit 36 corresponds to the monitoring target service determination unit, the traffic information reception determination unit 38 corresponds to the traffic information reception determination unit, and the traffic information output processing unit 40 and the decoder 16 correspond to the traffic information output unit.

  The digital broadcast receiver according to the present embodiment has such a configuration. Next, while receiving a service desired by the user, an operation for receiving and outputting road traffic information supported by another service. Will be described.

  FIG. 4 is a flowchart showing an operation procedure for outputting road traffic information during service reception. The digital broadcast receiver is activated and the reception of the service is started by the reception process of the service reception processing unit 34 (in the case of starting reception of the service selected by the user or the service received at the previous power-off) When the audio data corresponding to this service is output from the decoder 16 (step 100), the monitored service setting unit 36 checks the contents of the announcement support information FIG0 / 18, thereby It is determined whether or not it corresponds to a TP station that supports road traffic information (TA information) (step 102). If the service being received corresponds to a TP station, that is, if this service supports TA information, the TA information included in this service may be acquired. Acquisition of TA information included in the service (operation of the present invention) is not performed. If it corresponds to a TP station, an affirmative determination is made in the determination of step 102. Next, the service reception processing unit 34 determines whether service switching is instructed by the user (step 104). If not, a negative determination is made and this determination is repeated. When the service switching is instructed, an affirmative determination is made in the determination in step 104, and the process returns to step 100 to receive the service after switching.

  If the service being received does not correspond to the TP station (in the case of a noTP station), a negative determination is made in the determination in step 102. Next, based on the reception history created and updated by the reception history creation / update unit 50, the monitoring target service determination unit 36 determines one specific service with the highest number of receptions as a monitoring target (step 106).

  In the example shown in FIG. 2, when the service 2 or 6 corresponding to the noTP station is being received, the service 4 having the largest number of receptions as the reception history is determined as the specific service to be monitored.

  Next, the traffic information reception determination unit 38 determines whether the TA information has been received (whether reception has started) in the specific service to be monitored by examining the contents of the announcement switch information FIG0 / 19. (Step 108). If the reception of TA information has not started, a negative determination is made and this determination is repeated. If the reception of TA information is started in the specific service, an affirmative determination is made in step 108.

  Next, the traffic information output processing unit 40 instructs the decoder 16 to interrupt the TA information that has been received for the service being received (step 110). Thereafter, TA information is output from the decoder 16 (step 112). Thereafter, the traffic information output processing unit 40 examines the contents of the announcement switch information FIG0 / 19 to determine whether or not the TA information has been received (step 114). If not completed, a negative determination is made, and the process returns to step 112 to continue outputting TA information. Further, when the reception of the TA information is completed, an affirmative determination is made in the determination of step 114.

  Next, the service reception processing unit 34 resumes the output process of the service received before the TA information interruption occurs (step 116), and determines whether or not service switching is instructed by the user (step 116). Step 118). If not instructed, a negative determination is made, and the operation returns to step 108 and the operations after the determination of whether or not TA information is received are repeated. If service switching is instructed, an affirmative determination is made in step 118, and the process returns to step 100 to receive the service after switching.

  As described above, in the digital broadcast receiver according to the present embodiment, the specific service for determining the presence / absence of reception of road traffic information (TA information) is limited to some services instead of all services included in the ensemble. It is possible to reduce the frequency of interruption of service during reception due to interruption of road traffic information and improve reception quality.

  In addition, a specific service is determined from a plurality of services included in one ensemble of DAB broadcasting. As a result, it is possible to receive a service and monitor the reception of road traffic information in other services using one tuner, and the configuration of the digital broadcast receiver can be simplified.

  In addition, by making a service with a high number of past receptions of each service (especially a service including road traffic information) a specific service, road traffic information included in services that are frequently used on a daily basis It can be acquired during service reception.

  Further, when a service that does not support road traffic information (a service corresponding to a noTP station) is being received, an interrupt is generated when road traffic information included in another service as described above is received. As a result, even when a service in which road traffic information is not distributed is being received, the road traffic information can be reliably acquired.

  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, the present invention is applied to a digital broadcast receiver as a DAB receiver. However, the present invention can be applied to other digital broadcast receivers.

  In the above-described embodiment, when a service being received does not support road traffic information, the specific service is monitored and road traffic information is acquired. However, the service being received supports road traffic information. Even in this case, a similar operation (acquisition of road traffic information included in other services) may be performed.

  In the above-described embodiment, one service with the highest number of receptions is set as the specific service to be monitored. However, the top two or three or more services with the highest number of receptions are less than all the services. It may be set as a specific service to be monitored. The number of specific services may be set as appropriate according to the interrupt frequency when the road traffic information is received. Alternatively, the number of specific services may be input (or changed) by the user operating the operation unit 70 according to the interrupt frequency.

  As described above, according to the present invention, a specific service for determining whether or not road traffic information is received is part of a plurality of services, thereby reducing the frequency of interruption of a service being received due to interruption of road traffic information. And reception quality can be improved.

10 antenna 12 RF unit 14 analog-digital converter (A / D)
DESCRIPTION OF SYMBOLS 16 Decoder 18 Output processing part 30 Control part 32 Reception service setting part 34 Service reception processing part 36 Monitoring object service determination part 38 Traffic information reception determination part 40 Traffic information output processing part 50 Reception log creation / update part 60 Display part 70 Operation part

Claims (5)

A receiving service setting means for setting a service to be received from a plurality of services according to a user operation;
Service receiving means for receiving the service set as the reception target by the reception service setting means and outputting the content;
Monitoring target service determining means for determining a specific service that is a part of the plurality of services and is to be monitored, according to the reception history of the service to be received by the service receiving means;
A traffic information reception determining unit that determines whether or not road traffic information included in the specific service to be monitored determined by the monitoring target service determining unit is received while receiving the service to be received by the service receiving unit;
Traffic information output for interrupting and outputting the road traffic information during reception of the service to be received by the service receiving means when the traffic information reception judging means determines that the road traffic information has been received Means,
A digital broadcast receiver comprising: In claim 1,
The digital broadcasting receiver characterized in that the plurality of services are included in one ensemble of DAB broadcasting. In claim 1 or 2,
The reception history includes at least the past reception count of the service received by the service receiving means,
The monitoring target service determining means determines a predetermined number of services with a large number of receptions as the specific service. In claim 3,
The monitoring target service determining means determines a service including road traffic information as the specific service. In any one of Claims 1-4,
A digital broadcast receiver, wherein road traffic information is interrupted by the traffic information output means when road traffic information is not included in the service to be received by the service receiving means.

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