JP2013120967A - Radio receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio receiver capable of consolidating plural pieces of information on obtained services from both of an FM-RDS tuner and a DAB tuner to integrally display a list of services.SOLUTION: The radio receiver having an FM-RDS receiving section 20 for receiving FM-RDS broadcast and a DAB receiving section 10 that receives DAB, includes: a memory device 40 that accumulates plural pieces of information obtained from services received through the two receiving sections; a control microcomputer 30 that generates an integrated service list of FM-RDS services and DAB services without discriminating therebetween based on the information accumulated in the memory device 40; a display device 60 that displays the integrated and generated service list; and an input device 50 that allows a user to select a service from the displayed integrated service list.

Description

  The present invention relates to a radio receiver capable of receiving radio data multiplex system broadcasting and digital radio broadcasting.

  In recent years, a tuner capable of receiving RDS (Radio Data System) broadcasts (hereinafter referred to as FM-RDS tuner) and a DAB (Digital Audio Broadcasting) broadcast receiver tuner (hereinafter referred to as DAB tuner) have been provided and connected to each other. A radio receiver with a configuration, or a radio receiver with an FM-RDS tuner and a DAB tuner set in the same housing, can be applied to in-vehicle devices, portable devices, etc. due to active DAB dissemination activities in European countries. It is starting to spread.

  In the FM-RDS service and the DAB service, an ID for identifying a program service is given for each service, and they are called PI (Program Identification) and SId (Service Identification), respectively. If the co-ID is the same, all the corresponding services can be regarded as the same content being broadcast. The radio receiver can discriminate the simul service related to the receiving service by accumulating the information. Particularly in European countries, there are many programs (hereinafter referred to as simul services) that are simultaneously broadcast by FM-RDS service and DAB service.

  The radio receiver can utilize this feature and maintain a good reception state according to the reception status of the FM-RDS tuner and the DAB tuner. Patent Document 1 proposes a method for searching for a simul DAB service obtained from ODA (Open Data Application) information defined in the RDS standard. From this ODA information (frequency, EId, SId), it is possible to obtain information on the simulcast station of the DAB service for the FM-RDS service being received, and by comparing the reception status of both FM-RDS and DAB tuners A service with better reception status can be selected.

  Similarly, the service names can be regarded as the same among the simul services. If the reception status of the service being received is poor and it is difficult for the radio receiver to acquire the service name, or if the service being received is FM-RDS service and dynamic PS, the radio receiver is using a simul service other than the service being received. It can be supplemented with the acquired service name. In Patent Document 2, even if the FM-RDS service being received is a dynamic PS, the service name of the DAB service stored in the storage unit and having the same broadcasting station identification ID as the received service is stored in the preset memory. It is used as.

  Here, the PI is an ID code (broadcast station identification ID) for identifying a service at the beginning of the data format of all RDS data frames (data groups) of RDS multiplexed data demodulated from the FM-RDS received signal. It is.

  The dynamic PS is a method of transmitting advertisements, music information, and the like by changing information to be transmitted every few seconds by the broadcasting station to PS (Program Service name: name of program service) instead of the broadcasting station name. In general, PS transmits broadcast station names, but dynamic PS is beginning to be used in some services in popular areas such as Germany, and radio receivers uniquely identify broadcast station names from acquired PSs. There is a disadvantage that cannot be done.

  In DAB, a carrier frequency group corresponding to each broadcast channel is called an ensemble, and a plurality of services are multiplexed in each ensemble. Each ensemble is given an EId (Ensemble Identifier) for identifying the ensemble. Further, each service multiplexed in the ensemble is assigned a SId (Service Identifier) code. These pieces of information are included in FIC (Fast Information Channel) data demodulated from the DAB received signal.

JP 2001-308732 A JP 2007-074085 A

  As described in Patent Document 1, in a method for obtaining information about a DAB simulcast station from ODA information of received RDS multiplexed data, an FM-RDS station puts information about a DAB simulcast station in ODA information. That is very rare. In addition, the FM-RDS coverage area is almost saturated throughout Europe, and the FM-RDS station will prepare and expand this information in Europe where DAB dissemination activities are active. Can not expect much.

  In Patent Document 2, a method for determining a simul service uses only the same code as the broadcast station identification ID of the service being received. This is a general method for identifying simulcast stations, and radio receivers having a service link function for switching to a service with good reception when the reception status of the DAB service being received deteriorates are beginning to be sold. The DAB standard includes service link information that provides information related to a simul service that is different from the broadcast station identification ID of the service being received from the broadcast station, and an OE (Other Ensemble) service that provides ensemble information for receiving the simul service. Is defined.

  However, these service link information and OE service information are not currently used, and dedicated operation screens are prepared for FM and DAB, respectively. For example, there are a preset channel function and a receivable program service list screen (generally called a station list screen in FM and a service list screen in DAB).

  Therefore, in the present invention, the radio receiver constructs a database from the reception history information of the service received by the FM-RDS tuner or the DAB tuner, and the service link information and the OE service information acquired from the ensemble received by the DAB tuner, An object is to provide a radio receiver that displays a list of services in an integrated manner.

  In order to achieve the above object, a radio receiver according to the present invention is a radio receiver having an FM-RDS receiver for receiving FM-RDS broadcast and a DAB receiver for receiving DAB. An integrated service list that integrates a list of services without distinguishing between the FM-RDS service and the DAB service based on the information stored in the memory device and the memory device that stores the information acquired from the service received at A control unit for generating, a display unit for displaying the generated integrated service list, and an input unit for selecting a service from the integrated service list displayed by the user.

  Here, the memory device obtains the PI for identifying the program service, the PS indicating the name of the program service, the information for calculating the reception quality level, and the simul DAB service information acquired by the FM-RDS receiver. ODA information including

  The memory device also acquires the EId for identifying the ensemble, the SId for identifying the program service, the Service Label indicating the name of the program service, the Short PS mask bit, and the reception quality acquired by the DAB receiver. Information for calculating the level, service link information, and OE service information are stored.

  The control unit converts the service label and the name of the program service into 8 bytes from the Short PS mask bit.

  In addition, the control unit provides a service that can be received from the reception history information stored in the memory device when a tuner that is not used for audio output in the audio mode or in a mode other than the audio mode, or by using a second tuner having a two-tuner configuration. The reception history information stored in the memory device and the information related to the simul service are updated.

  Further, the control unit determines the accuracy of the name based on the method of acquiring the name of the program service, and stores it in the memory device.

  Also, the control unit extracts the service name stored in the memory device from the broadcast station identification ID of the service being received without being affected by the dynamic PS during the preset memory operation, and updates the preset memory information with the extracted service name. .

  Further, the control unit notifies the user that a new service name has been acquired before updating the preset memory information with the extracted service name, and prompts the service name to be updated.

  In addition, the control unit monitors reception quality related to the service being received at regular intervals, extracts an alternative frequency that is a candidate for the simul service from the memory device, and switches to a frequency with good reception before the user cannot listen to the broadcast content.

  The control unit also determines whether each service can be received from the reception history information and the simul service information stored in the memory device, and generates an integrated service list for the receivable services.

  In addition, the control unit generates the integrated service list so that information on the same simul service is not displayed redundantly in the integrated service list.

  In addition, the display unit displays a screen that allows the user to determine whether the currently received service is FM-RDS or DAB.

  According to the radio receiver of the present invention, it is possible to efficiently obtain information related to the simul service by constructing a database related to the simul service stored in the memory device from the broadcast station identification ID of the service being received.

  In addition, when displaying the program service list screen that can be received by the user, the same simul service broadcast on FM-RDS and DAB is displayed as a list of the same service without dividing the FM-RDS service and DAB service as separate services. It is possible to present a list of services that can be received without making the user aware of FM-RDS and DAB.

The block diagram which shows the structure of the radio receiver in one embodiment of this invention Data structure diagram showing an example of a database for searching for information on simul service in the radio receiver 100 The flowchart which shows the process sequence which updates data to the reception service log | history D1 at the time of the FM-RDS service reception of the radio receiver 100 Flow chart showing processing procedure for updating data in reception service history D1 and ensemble D5 when the radio receiver 100 receives a DAB service The flowchart which shows the process sequence which updates data to the service list D2 at the time of the FM-RDS service reception of the radio receiver 100 Flow chart showing a processing procedure for updating data in the service list D2 when the radio receiver 100 receives the DAB service. The flowchart which shows the process sequence which updates data to the service link D3 at the time of FM-RDS service reception of the radio receiver 100 Flow chart showing a processing procedure for updating data in the service link D3 when the radio receiver 100 receives the DAB service. The flowchart which shows the process sequence which updates data to the service list D2 and the OE service D4 at the time of DAB service reception of the radio receiver 100 The flowchart which shows the detailed process sequence which updates the service name of the service list D2 of the radio receiver 100 The flowchart which shows the detailed process sequence which updates data to the ensemble D5 of the radio receiver 100 Flow chart showing a processing procedure for searching for information on a service that is a candidate for simul service of the radio receiver 100 Flow chart showing a processing procedure for extracting a service name in the preset memory of the radio receiver 100 FIG. 6 is a diagram for explaining an integrated service list displayed on the display device 60, (a) a diagram illustrating an example of a conventional DAB service list screen, and (b) a diagram illustrating an example of a conventional FM station list screen; (C) The figure which shows an example of the screen of the 1st page of an integrated service list, (d) The figure which shows an example of the screen of the 2nd page of an integrated service list

  Hereinafter, a radio receiver according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a radio receiver according to an embodiment of the present invention. As shown in FIG. 1, the radio receiver 100 of the present invention includes a DAB receiving unit 10, an AM / FM-RDS receiving unit 20, a control microcomputer 30, a memory device 40, an input device 50, and a display device 60. And an audio selector unit 70.

  The DAB receiving unit 10 includes a DAB front end unit 11, a DAB baseband processing unit 12, an audio decoder unit 13, and an FIC data decoder unit 14. An RF signal is input from the DAB antenna to the DAB front end unit 11, a signal obtained by digitizing the intermediate frequency signal is output from the DAB front end unit 11, and is input to the DAB baseband processing unit 12. The DAB baseband processing unit 12 demodulates the input digital signal and separates it into a radio audio digital audio data signal and an FIC data signal. The separated signals are transmitted to the audio decoder unit 13 and the FIC data decoder unit 14, respectively. The

  The audio decoder unit 13 decodes the radio broadcast digital audio data signal output from the DAB baseband processing unit 12 and extracts audio codec data of MPEG2 (DAB) or MPEG4 HE-AAC v2 (DAB +, DMB). The audio signal is converted into an audio signal and sent to the audio selector unit 70.

  The FIC data decoder unit 14 decodes the FIC (Fast Information Channel) data signal output from the DAB baseband processing unit 12, and receives the EId of the ensemble being received, the SId of each service included in the ensemble, and service link information Various information such as OE service is extracted and sent to the control microcomputer 30.

  Here, for the services included in the ensemble being received, information that lists broadcast station identification IDs related to the simul service for each service SId is provided from the broadcast station in the service link information. The list information includes FM-RDS PI and DAB SId codes which are simulative services. When the reception status of the receiving service deteriorates, the radio receiver can switch to another simultaneous service with good reception by using this list information. The service link information is included in the FIG type 0 extension 6 of the FIC data demodulated from the DAB received signal.

  In the OE service, information that lists EIds for the SId of the DAB service among the broadcast station identification IDs of the simul service obtained from the service link information is provided from the broadcast station. When the reception status of the receiving DAB service deteriorates, the radio receiver can search for DAB simul service included in other ensembles other than the reception ensemble from these information. This information is included in the FIG type 0 extension 24 of the FIC data demodulated from the DAB received signal.

  The AM / FM-RDS receiver 20 includes an AM / FM front-end unit 21, an AM / FM demodulator 22, an RDS data decoder 23, and a PLL demodulator 24. An RF signal is input from the AM / FM antenna to the AM / FM front end unit 21 and an intermediate frequency signal is output. The AM / FM demodulator 22 receives the intermediate frequency signal output from the AM / FM front end unit 21 as an input signal and demodulates it. After the demodulation, the radio broadcast signal and the RDS signal are separated, and the separated demodulated signals are transmitted to the audio selector unit 70 and the RDS data decoder unit 23, respectively.

  The RDS data decoder 23 decodes the demodulated signal of the data broadcast from the AM / FM demodulator 22, extracts various information including PI, PS information, and ODA information, and sends it to the control microcomputer 30. A PLL (Phase Locked Loop) demodulator 24 performs control for tuning a certain frequency selected by the user.

  The control microcomputer 30 has a configuration in which the reception functions of the DAB receiver 10 and the AM / FM-RDS receiver 20 can be made to function separately and can be received simultaneously. In addition, each receiving unit may be configured to include two or more tuners. Further, the control microcomputer 30 acquires information for calculating the reception quality of the FM-RDS service or the DAB service from the RDS data decoder unit 23 or the FIC data decoder unit 14, respectively.

  In addition, the control microcomputer 30 detects a user operation (for example, an operation of selecting and inputting a service from a preset service list screen) in the input device 50, and responds to the user operation by the radio receiver 100. Display data necessary for controlling the operation and generating a display screen is sent to the display device 60.

  The memory device 40 includes a ROM and a RAM, and a program executed by the control microcomputer 30, predetermined data, and the like are recorded in the ROM. The RAM is used as a temporary storage location for data or as a data storage location for a database constructed in the present invention when the control microcomputer 30 performs predetermined processing or calculation. Further, these ROM and / or RAM may be built in the control microcomputer 30.

  The input device 50 is configured such that a user can perform an input operation on the radio receiver 100. Note that the input device 50 includes an input device by pressing a button such as a touch panel or a hard key, a remote controller using infrared communication, or the like.

  The display device 60 is configured to be able to display status information about the service being received, information transmitted as RDS data and DAB FIC data, and a screen that allows the user to select the service that the user wants to listen to. For example, it is composed of a liquid crystal display.

  The processing operation of the radio receiver 100 of the present embodiment configured as described above will be described in detail with reference to the drawings. First, FIG. 2 is a data structure diagram showing an example of a database constructed in the memory device 40 of the radio receiver 100 in the present embodiment. As shown in FIG. 2, the database constructed in the memory device 40 of the radio receiver 100 includes six data of a receiving service D0, a receiving service history D1, a service list D2, a service link D3, an OE service D4, and an ensemble D5. The structure and the role of each data structure will be described in detail below.

  First, the notation in each data structure shown in the figure will be described. Each data structure is represented by a solid rectangle, and is divided into three stages by dotted lines in order to express the details of the data structure in an easy-to-understand manner. << >> shown at the top is the name of the data structure. The middle row is the key data (data for uniquely identifying the attribute data) of the data structure, meaning that the same key data is not duplicated, and that the information associated with the key data is unique. . The lower row shows attribute data related to key data.

<< Receiving service >> D0 in the figure is a data structure for holding information related to the receiving service that the user is listening to. In the data structure, the control microcomputer 30 can store the following four pieces of information in order to store the reception status regarding the service being received. The key data is unnecessary because it is information related to the service being listened to by the user.
(1) “Frequency” for maintaining the frequency tuned by the PLL demodulator 24.
(2) “Broadcasting station identification ID” for identifying the receiving service acquired from the RDS data decoder unit 23 or the FIC data decoder unit 14. PI or SId is stored in accordance with the decoder unit acquired by the control microcomputer 30 and becomes necessary information for determining a simul service to be described later.
(3) “Band type” for determining whether the frequency with which the radio receiver 100 is tuned is the FM band or the DAB band. The control microcomputer 30 can determine the tuner in use by this type.
(4) “Reception quality” for indicating the reception quality level calculated by the control microcomputer 30 from information such as the electric field strength from the tuner and the bit error rate (hereinafter referred to as BER) corresponding to the service being received. From this information, the control microcomputer 30 can determine that the service being received is audible if it exceeds a certain threshold.

In the figure, << reception service history >> D1 accumulates information about the service received by the radio receiver 100 and its reception status, and extracts frequency candidates that can be switched to a receivable simul service from the broadcast station identification ID. This is a data structure for The data structure uses key data as a frequency and broadcasting station identification ID to derive a frequency as a simul service candidate from a certain broadcasting station identification ID, and allows the following three pieces of information to be stored in attribute data.
(1) “Band type” stored to determine whether the radio receiver 100 is in the FM band or DAB band when the radio receiver 100 is tuned to the frequency.
(2) “Last reception quality” for storing the value at which the control microcomputer 30 last calculated the reception quality level when the radio receiver 100 is tuned to the frequency.
(3) “Last reception date and time” stored in order to obtain an elapsed time after calculating the last reception quality in (2) above when checking the reception status of the frequency. Since some radio receivers do not have a clock, it is possible to register the time that has elapsed since the frequency was not received.

  Since the present invention considers mobile reception such as in-vehicle devices, the control microcomputer 30 does not determine whether the frequency can be received only by the last reception quality, and together with the elapsed time obtained from the last reception date and time, It may be determined whether the frequency is receivable. Alternatively, when the last reception date and time has passed for a certain period of time, the reception quality and the broadcast station identification ID may be re-inspected by tuning to the frequency.

  Since the data structure stores the switching frequency of the simul service, the control microcomputer 30 controls the DAB receiving unit 10 and the AM / FM-RDS receiving unit 20 to keep the last received quality of each frequency as new as possible. It is desirable. For example, when a tuner that is not used for audio output in the audio mode or in a mode other than the audio mode, the control microcomputer 30 uses the information stored in the data structure as a reference such as the order of the last reception date and time, or the order of the last reception quality is poor. Based on this, the corresponding frequency is searched (hereinafter referred to as background search), and the reception quality can be constantly updated. Alternatively, if each tuner has a two-tuner configuration, in addition to background search, the control microcomputer 30 efficiently controls the tuner that is outputting sound, outputs the sound with the first tuner, and updates the reception quality with the second tuner. Then it is even better.

  In the figure, << service list >> D2 indicates that the radio receiver 100 treats the same broadcast station identification ID as the same simul service, and the service name related to the simul service and information necessary for the integrated service list screen to be displayed on the display device 60. Is a data structure for extracting. In order to uniquely derive the service name from the broadcast station identification ID, the key data is the broadcast station identification ID, and the attribute data is the following four.

  (1) “Service name” that stores the broadcast station name acquired while the radio receiver 100 receives the broadcast station identification ID. The control microcomputer 30 acquires PS (Program Service name) for the FM-RDS service and Service Label for the DAB service from the RDS data decoder unit 23 and the FIC data decoder unit 14 as the information, and stores them in the data structure. Character string information (hereinafter referred to as “Long PS”) having a maximum of 8 bytes for PS and a maximum of 16 bytes for Service Label can be acquired. When PS data is stored, PS data is preferably padded in the upper 8 bytes, and the lower 8 bytes are padded with ASCII code space or NULL.

  (2) “Short PS mask bit” for storing a mask bit for converting a service name (abbreviation) of up to 8 bytes from the service name of (1). The control microcomputer 30 can acquire the information from the FIC data decoder unit 14 while receiving the DAB service, and can convert the Long PS of the DAB service into a Short PS of 8 bytes at maximum. In the case of FM-RDS, 0xFF00 (fixed value) is stored from the description of (1), and the data structure is shared.

  (3) “PS type classification” for determining a priority order for storing data related to service names acquired by the control microcomputer 30. As a feature of the service name, first, in the FM-RDS service, it is difficult to obtain an accurate service name because many broadcasting stations apply dynamic PS. In the DAB service, it is possible to obtain a detailed service name based on the Long PS and not to operate like the dynamic PS. Furthermore, since the PS of the Short PS and the simul FM-RDS service can be regarded as the same information, it can be said that the Service Label of the DAB service is a more accurate service name. Therefore, the order in which the data is preferentially stored in the database is DAB Service Label, FM-RDS normal PS, and FM-RDS dynamic PS.

  (4) “Receivability flag” for determining whether or not the service can be received from the frequency of the candidate for the simul service associated with the broadcast station identification ID. The control microcomputer 30 may determine whether or not the broadcast station identification ID can be received depending on whether or not there is a switchable frequency in the simul service stored in the << reception service history >> D1 associated with the broadcast station identification ID. it can. The determination as to whether or not each frequency can be received is the same as the content described in the last reception quality and last reception date and time of << reception service history >> D1. Here, when the control microcomputer 30 determines that reception is possible, it may be determined that the higher the number of receivable frequencies, the higher the level that can be received, and the display device 60 may display an icon indicating the level.

  << Service link >> D3 in the figure is the broadcast station identification of the service being received using the ODA information acquired by the radio receiver 100 from the RDS data decoder 23 and the service link information acquired from the FIC data decoder 14. The broadcast station identification ID different from the ID is also a data structure for enabling the control microcomputer 30 to determine as a simultaneous service. The key data is broadcast station identification ID, simul service broadcast station identification ID (simal broadcast station) so that the control microcomputer 30 can determine the simul service broadcast station identification ID and the simul service band from the broadcast station identification ID of the receiving service. Identification ID) and band type (simultaneous broadcast band type).

  “Data acquisition classification” in the figure, which is attribute data, is a code for determining whether it is ODA information acquired from RDS data or service link information acquired from DAB data.

  In particular, the above-mentioned << receiving service >> D0 to << service link >> D3 have a data structure that can be used in common with FM-RDS and DAB, and the control microcomputer 30 determines the broadcast station name from the information regarding the receiving service. And the data structure that can handle information such as simul service in common with FM-RDS and DAB.

  << OE service >> D4 in the figure is a data structure for converting the OE service information acquired by the radio receiver 100 from the FIC data decoder unit 14, the EId of the ensemble received in the past, and the received frequency into the received service history information. It is. The data structure stores the combination of SId and EId for which a frequency to be received by the DAB tuner could not be derived from the EId acquired by the control microcomputer 30 by the << ensemble >> D5 described later, and the key data is SId and EId. This is because the control microcomputer 30 cannot derive the frequency to be received by the DAB tuner from only EId and cannot handle it as an alternative frequency for the simul service. A method of using the accumulated data as an alternative frequency candidate for the simul service will be described later.

  << Ensemble >> D5 in the figure is a data structure for accumulating the EId and reception frequency acquired while the radio receiver 100 is receiving the ensemble which is a DAB tuner, and deriving the frequency to be received from a certain EId. is there. The key data of the data structure is a frequency and EId.

  When the control microcomputer 30 detects a new combination of EId and frequency by processing such as service selection or background search of another ensemble and updates the information to the data structure, the acquired EId is << OE. If it exists in the service >> D4, the combination data registered in << OE service >> D4 is transferred to << received service history >> D1, so that information on more simultaneous services can be accumulated. Yes. After the combination data is transferred to << reception service history >> D1, the data of << OE service >> D4 may be deleted.

  FIGS. 3 and 4 are flowcharts showing processing procedures for updating the reception status when the receiving service is the FM-RDS service and the DAB service in the radio receiver 100 according to the present embodiment.

  First, the processing flow during reception of the FM-RDS service in FIG. 3 will be described in detail. As shown in FIG. 3, the radio receiver 100 acquires a PI for identifying the FM-RDS service being received (step S01). After obtaining PI in step S01, the process proceeds to step S02 in order to monitor the reception quality at regular time intervals.

  In step S02, the control microcomputer 30 acquires parameters for calculating reception quality such as electric field strength from the AM / FM-RDS receiver 20, and calculates reception quality from these values. If the value of the calculated result is equal to or greater than a certain threshold, the control microcomputer 30 can determine that the corresponding service is receivable.

  Next, in step S03, information associated with the reception frequency and the PI acquired in step S01 is accumulated in the reception service history D1. Here, for each data item defined in << reception service history >> D1, the control microcomputer 30 uses the frequency received by the radio receiver 100 as the frequency and the broadcast station identification ID as step S01. The acquired PI, FM-RDS for the band type, the reception quality calculated in step S02 for the last reception quality, and the date and time when the last reception quality was calculated for the last reception date and time are stored in the database built in the memory device 40. Let By periodically updating the information, it can be used for information at the time of switching between the AF (Alternative Frequency) function of FM-RDS and the service link function.

  Step S04 is a process necessary for storing, in addition to << reception service history >> D1, information in the << reception service >> D0 as information related to the last service received by the radio receiver 100. The same values as the data used in step S03 are stored in << receiving service >> D0 for the reception frequency, broadcast station identification ID, band type, and reception quality. When this processing is completed, the control microcomputer 30 repeats the processing from step S02 again after a predetermined time has elapsed, so that the reception status of the receiving service is always kept up to date.

  Next, the processing flow regarding the DAB service reception in FIG. 4 will be described in detail. As shown in FIG. 4, the radio receiver 100 first acquires an EId for identifying an ensemble including the reception service (step S11), and subsequently acquires the SId of the reception service (step S12). Next, the process proceeds to step S13 in order to monitor the reception quality at regular time intervals as in FIG.

  In step S13, the control microcomputer 30 acquires parameters for calculating reception quality such as electric field strength and BER from the DAB receiver 10, and calculates reception quality from these values. The control microcomputer 30 can determine a receivable service using this value, as in step S02 of FIG.

  In step S14, the reception frequency and EId acquired in S11 are accumulated in << ensemble >> D5. Further, when there is data stored in << OE service >> D4 corresponding to the acquired EId, the corresponding data is transferred to << reception service history >> D1 as described above. This process will be described in detail with reference to FIG.

  In step S15, for each data item defined in << reception service history >> D1, the control microcomputer 30 uses the frequency received by the radio receiver 100 as the frequency and S12 as the broadcast station identification ID. In the database constructed in the memory device 40, the SId acquired in step S13, DAB for the band type, the reception quality calculated in step S13 for the last reception quality, and the date and time when the last reception quality is calculated for the last reception date and time are stored. .

  In step S16, the corresponding data is stored in << receiving service >> D0, as in step S04 of FIG. 3 of the FM-RDS service. When this processing is completed, the control microcomputer 30 repeats the processing from step S13 again after a predetermined time has elapsed so that the reception status of the receiving service is always kept up to date.

  Next, in the radio receiver 100 according to the present embodiment, a processing procedure for accumulating information on the FM-RDS service or DAB service received by the radio receiver 100 so far will be described with reference to the flowcharts of FIGS. explain.

  FIG. 5 shows a processing procedure for accumulating information on services such as PI and PS acquired during reception of the FM-RDS service in the << service list >> D2. First, in step S21, the PI and PS of the FM-RDS service being received are acquired. In step S22, it is determined whether the PS acquired in step S21 is a normal PS or a dynamic PS so that it can be distinguished whether the PS acquired by the control microcomputer 30 is a service name.

  In step S23, the control microcomputer 30 searches for the alternative frequency and the last reception quality for the simul service from the PI acquired in step S21 and << reception service history >> D1. As a result of the search, the control microcomputer 30 determines TRUE if a receivable frequency exists in the corresponding broadcast station identification ID, and determines FALSE if it does not exist.

  Next, in step S24, information related to the PI acquired in step S21 is accumulated in << service list >> D2. Here, for each data item of << service list >> D2, the control microcomputer 30 sets PI as the broadcast station identification ID, PS as the service name, 0xFF00 (fixed value) as the Short PS mask bit, and PS type. The result determined in step S22 for the classification and the result determined in step S23 for the reception enable / disable flag are stored in the database built in the memory device 40. However, the service name acquired by the radio receiver 100 is correctly stored in the database so that the dynamic PS does not affect the service name. For this reason, processing related to the service name is separately performed, and the processing procedure will be described in detail later with reference to FIG.

  At this time, in the case of FM-RDS, for the purpose of sharing the data structure with DAB, the PS should be padded with data from the beginning of the service name up to 8 bytes and padded with a space after the PS. At this time, not NULL but NULL may be used. Therefore, the Short PS mask bit is fixed to 0xFF00.

  FIG. 6 shows a processing procedure for storing information on services such as SId and Service Label acquired during DAB service reception in the << service list >> D2. First, in step S31, the control microcomputer 30 acquires the EId of the reception ensemble from the FIC data decoder unit 14 and all the SIds related to the services included in the ensemble. Next, in order to acquire the service name of each service acquired in step S31, the control microcomputer 30 acquires a service label (long PS) and a short PS mask bit for each SId from the FIC data decoder unit 14 (step S32). .

  In step S33, the control microcomputer 30 searches for the alternative frequency and the last reception quality for the simul service from the corresponding SId and << reception service history >> D1. As a result of the search, the control microcomputer 30 determines TRUE if a receivable frequency exists in the corresponding broadcast station identification ID, and determines FALSE if it does not exist.

  In step S34, information such as a service name related to the corresponding SId is accumulated in << service list >> D2. Here, for each data item of << service list >> D2, the control microcomputer 30 sets SId as the broadcast station identification ID, Service Label (Long PS) acquired in step S32 as the service name, and Short PS. The Short PS mask bit acquired in step S32 is stored in the mask bit, the DAB Service Label is stored in the PS type section, and the determination result in step S33 is stored in the reception enable / disable flag in the database built in the memory device 40. In this process, as in FIG. 5, the processing procedure related to the service name will be described later with reference to FIG.

  The DAB service does not operate a dynamic PS like the FM-RDS service, and utilizes the fact that the service names related to the same simul service are the same. In step S35, the corresponding service IDs obtained in step S32 are all replaced with the corresponding IDs obtained by searching the thermal service broadcasting station identification IDs stored in << service link >> D3 from SId. . As a result, all the same simul service have the same name, which is used for obtaining a service name at the time of preset memory, which will be described later, and for extracting a list of integrated service lists in which simul services are grouped together.

  The processing from step S32 to step S35 loops as many times as the number of SId acquisitions in the SId list acquired in step S31, and information about all the services included in the received ensemble is accumulated in the << service list >> D2. . In addition, as with the last reception quality described in FIG. The reception enable / disable flag may be monitored for each station identification ID.

  Next, a processing procedure for accumulating service link information related to a receiving service provided from a broadcasting station in radio receiver 100 according to the present embodiment will be described with reference to FIGS. By accumulating this information, the control microcomputer 30 can determine that not only the same broadcast station identification ID as the broadcast station identification ID of the service being received, but also different services are simultaneous services.

  FIG. 7 shows a processing procedure for accumulating ODA information related to the simul DAB service corresponding to the corresponding PI during reception of the FM-RDS service. First, in step S41, ODA information is acquired from the FM-RDS service being received, and information related to the simul DAB service is extracted from these data.

  Next, in step S42, information related to the simul DAB service of the ODA information acquired in step S41 is accumulated in << service link >> D3. Here, for each data item of << service link >> D3, the control microcomputer 30 receives the SId of the simul DAB service acquired from the ODA information as the broadcasting station identification ID and the FM-RDS receiving the simul broadcasting station identification ID. The service PI is stored in a database constructed in the memory device 40, and FM-RDS for the simulcast band type.

  Further, in step S43, the combination of the frequency and SId related to the simul DAB service from the ODA information acquired in step S41 is accumulated in << received service history >> D1, and in step S44, the simulative from the ODA information acquired in step S41. It can be stored in << ensemble >> D5 with a combination of frequency and EId for DAB service.

  When both the processes in steps S43 and S44 are executed, the radio receiver 100 cannot calculate the last reception quality because the radio receiver 100 has not received the ensemble and service acquired in step S41. In order to allow the control microcomputer 30 to calculate the reception quality with priority when executing the background search, it is preferable to store a value that can determine whether the reception is unconfirmed in the last reception quality or the last reception date and time. .

  FIG. 8 shows a processing procedure for accumulating service link information related to an ensemble during DAB service reception. The control microcomputer 30 can accumulate the information of the simul service for the DAB service included in the receiving ensemble by accumulating the service link information acquired from the FIC data decoder unit 14 in << service link >> D3.

  First, in step S51, the control microcomputer 30 acquires service link information related to the receiving ensemble from the FIC data decoder unit 14. Based on the acquired service link information, it is possible to acquire a combination of SId as a service link source, a broadcasting station identification ID (SId of FM-RDS and SIB of DAB service) and a band type regarding the simul service related to this ID. From << service link >> D3 and << received service history >> D1, the control microcomputer 30 can extract simultaneous service candidates having a broadcast station identification ID different from the broadcast station identification ID of the service being received.

  In step S52, all combinations of the service link source SId acquired in step S51, the broadcast station identification ID of the service link destination simul service, and the band type thereof are stored in << service link >> D3. The date and time when the data is acquired may be added to the database, and may not be used if the accumulated information is old.

  By accumulating such information, it is possible to extract more simul service candidates than the simul service obtained from the prior art, and it becomes possible to realize a more accurate and more stable reception status of service names. .

  FIG. 9 shows a processing procedure for accumulating OE Service information during reception of a certain ensemble in radio receiver 100 according to the present embodiment. By accumulating this information, the control microcomputer 30 can recognize the frequency of the ensemble including the simul DAB service candidate SId from the combination of the EId and the frequency accumulated in the << ensemble >> D5.

  First, in step S61, the control microcomputer 30 acquires OE Service data from the FIC data decoder unit 14. The OE Service information acquired by the control microcomputer 30 can acquire a list of EIds in which the simul DAB service is included in other ensembles for services included in the ensemble being received. The control microcomputer 30 can determine the frequency corresponding to EId from the EId and data stored in << ensemble >> D5.

  In step S62, in order to determine the frequency of each EId acquired in step S61, the control microcomputer 30 searches for the EId acquired in step S61 from the data stored in << ensemble >> D5. If the EId exists (YES in step S62), the process proceeds to step S63, and if not (NO in step S62), the process proceeds to step S64.

  In step S63, since the frequency associated with the corresponding EId can be extracted, the combination of the corresponding frequency and SId is accumulated in the << service list >> D2. In step S64, if only EId is used, the control microcomputer 30 does not know the frequency to be tuned to the DAB tuner. Therefore, the combination of the corresponding SId and EId is accumulated in << OE service >> D4 until the frequency of the corresponding EId can be determined.

  FIG. 10 is a flowchart showing a detailed processing procedure when the service name of << service list >> D2 is updated in radio receiver 100 according to the present embodiment. When the service name is acquired while receiving the FM-RDS service or DAB service, the service name is classified into the following three patterns as described in the PS type classification, and the accuracy of the service name differs depending on the pattern.

(1) M-RDS service Dynamic PS
(2) RDS service Normal PS
(3) DAB service Service Label
The service name becomes more accurate as it goes from the top to the bottom of the pattern, and in the present invention, the service name is stored in the priority order of (3)>(2)> (1), and the user can accurately recognize the service name. I am doing so.

  First, in step S71, since the control microcomputer 30 has already acquired the broadcast station identification ID and service name relating to the reception service, the data relating to the corresponding broadcast station identification ID has already been accumulated in the << service list >> D2. Search for. As a result of the search, if the information related to the corresponding broadcast station identification ID has already been stored in << service list >> D2 (YES in step S71), the process proceeds to step S73 in order to update the corresponding data. If not stored (NO in step S71), the control microcomputer 30 determines that new data has been acquired, stores the acquired service name in the << service list >> D2 (step S72), and ends this process. .

  Next, in step S73, it is determined whether the receiving service is the DAB service in order to preferentially store the DAB Service Label. If the control microcomputer 30 determines that the service being received is DAB (YES in step S73), the process proceeds to step S74. If it is determined that the service being received is FM-RDS (NO in step S73), the process proceeds to step S76.

  After the control microcomputer 30 determines that the service being received is DAB, the information of << service list >> D2 is updated by using the acquired Service Label as the service name for the broadcast station identification ID (step S74), and further the service being received The service names of the broadcasting station identification IDs of all simul services related to the SId are updated (step S75).

  In step S76, since the service received by the radio receiver 100 is the FM-RDS service, the control microcomputer 30 first sets the PS type classification of the service name stored in the << service list >> D2 to DAB Service Label. It is determined whether it is other than. As a result of the determination, if the PS type classification is other than DAB Service Label (YES in step S76), the process proceeds to step S77. When the PS type classification is DAB Service Label (NO in step S76), since the service name with the highest priority has already been accumulated, the service name is not updated, and this process ends.

  As described above, since FM-RDS PS has two patterns of normal PS and dynamic PS, it is determined in step S77 whether the acquired PS is a normal PS. If the control microcomputer 30 determines that it is a normal PS (YES in step S77), the process proceeds to step S78, and if it is determined that it is a dynamic PS (step S77, NO), the service name is not updated, and this process ends. However, the service name may be updated when the acquired PS is a dynamic PS and the PS acquisition classification stored in the << service list >> D2 is a dynamic PS.

  In step S78, since the service name can be acquired as a normal PS by FM-RDS, the database is updated using the PS for the PI of the reception service as the service name, and this processing is terminated.

  Next, FIG. 11 is a detailed flowchart showing a processing procedure for updating << OE service >> D4 and << ensemble >> D5 when updating information related to a certain ensemble in radio receiver 100 according to the present embodiment. It is.

  First, in step S81, the control microcomputer 30 is required for << ensemble >> D5 when it is desired to detect a new frequency / EId combination or update the last reception quality with respect to the acquired frequency / EId combination. Accumulate information.

  In step S82, the control microcomputer 30 searches the << OE service >> D4 for data relating to the EId with respect to the EId updated in step S81. If data exists (YES in step S82), the process proceeds to step S83. If it does not exist (NO in step S82), this process ends.

  In step S83, the control microcomputer 30 can determine the frequency from the corresponding EId with respect to the SId stored in << OE service >> D4 and the reception frequency is unknown. Information is stored in << reception service history >> D1, and the data stored in << OE service >> D4 is no longer necessary and is deleted (step S84), and this process ends.

  FIG. 12 is a flowchart showing a processing procedure for extracting a candidate list of simul service for a service being received in radio receiver 100 according to the present embodiment. With this process, when the reception status of the receiving service deteriorates, it is possible to switch to another service with good reception, and it is possible to always maintain a stable reception state.

  First, in step S91, it is determined whether the broadcast station identification ID of the service being received has already been acquired. If the broadcast station identification ID has been acquired (YES in step S91), the process proceeds to step S92. If not acquired, the simul service candidate cannot be extracted, and thus this process ends.

  In step S92, if the PS type category stored in << service link >> D2 corresponding to the broadcast station identification ID of the service being received is DAB Service Label (YES in step S92), the process proceeds to step S93. In other cases (NO in step S92), the process proceeds to step S94.

  As described in step S35 of FIG. 6, when the PS type classification is DAB Service Label, the service names related to the same simul service are processed to be the same, and the efficiency is obtained by searching using the service name as a search key. The simul service candidate can be extracted.

  In step S93, the broadcast station identification ID corresponding to the broadcast station identification ID of the service being received, which has the same service name as the service name stored in << service list >> D2, is obtained from << service list >> D2. All are extracted, and the process proceeds to step S95.

  In step S94, the control microcomputer 30 can determine that the reception service of the corresponding broadcast station identification ID is only the past FM-RDS service. In this processing, from the information stored in << service link >> D3, a broadcast station identification ID in which the simulcast station identification ID and the broadcast service identification ID of the reception service are the same and the simulcast band type is FM-RDS is obtained. << Service link >> Extracted from D3.

  Finally, from the result obtained in step S93 or step S94 in step S95, the control microcomputer 30 extracts a receivable alternative frequency that becomes a simul service from the data stored in << reception service history >> D1. . The alternative frequency that can be received here is a frequency that is equal to or higher than a certain threshold at which the last reception quality can be received, and the last reception date and time is within a certain time from the current time.

  The control microcomputer 30 rearranges the extracted alternative frequencies from the list of the alternative frequencies in the order of the best reception quality, checks whether it is possible to switch to the simul service in the order of the good reception quality, and ends this processing. In the method of checking the receivable simul service, the control microcomputer 30 performs the simul service switching check in preference to the simul DAB service having good sound quality, and then processes the FM-RDS service in the order of checking. Also good.

  As described above, the control microcomputer 30 monitors the reception quality related to the service being received at regular intervals, and extracts the alternative frequency that is a candidate for the simul service from the memory device, so that the user can receive the broadcast content before it can hear it. It is possible to switch to a good frequency.

  FIG. 13 is a flowchart showing a processing procedure for specifying a service name when the radio receiver 100 according to the present embodiment has a preset memory function and a user stores data in a preset channel for a service being received.

  In step SA1, it is determined whether the broadcast station identification ID of the service being received has been acquired. If it has been acquired (YES in step SA1), the process proceeds to step SA2, and if it has not been acquired (NO in step SA1), the service name cannot be specified, so this process ends.

  In step SA2, the service name stored in << service list >> D2 is acquired from the broadcast station identification ID of the service being received, and this data is handled as data stored in the preset memory and held in the memory device 40. The preset memory information is updated (step SA3).

  Here, if the PS type classification of the service name stored in << service list >> D2 is dynamic PS, then the radio receiver 100 determines that the service name for the corresponding broadcast station identification ID is normal PS or Service Label. If the service name is updated, a screen that informs the user that a new service name has been acquired may be displayed to prompt the user to update the service name stored in the preset memory.

  In this way, for example, there is a case in which the user is notified of the update by notifying the same country in Europe, but there are cases where the broadcast station identification ID is the same, and this case is encountered when traveling far away on vacation, etc. In such a case, the mechanism for automatically updating the service name may cause inconvenience to the user. Therefore, it may be more convenient to update the service name according to the user's intention.

  Next, an integrated service list generated using the database stored and updated as described above will be described with reference to FIG. 14A and 14B are diagrams for explaining an integrated service list displayed on the display device 60. FIG. 14A shows a screen of a conventional DAB service list, and FIG. 14B shows a screen of a conventional FM station list. (C) is a diagram showing a screen of the first page of the integrated service list obtained by integrating (a) and (b), and (d) is a diagram showing a screen of the second page of the integrated service list.

  Conventionally, the user has displayed the DAB service list screen with the DAB selection button 202 shown in FIG. 14A, and the FM station list screen with the FM selection button 203 shown in FIG. 14B. That is, service link information, OE service information, and the like are not used, and dedicated operation screens are prepared for FM and DAB, respectively. Further, in FIG. 14A, two service names “C1” are displayed in duplicate on the list. This is because the service names are the same, but the broadcast station identification IDs are different.

  In the present embodiment, it is possible to construct a database and display on the screen integrated service lists 300 and 310 obtained by integrating a list of services. For example, FIGS. 14C and 14D respectively show examples of screens on the first and second pages of the integrated service list. The received service display unit 301 that displays the service being received and the receivable service list. 306 and 307, a page feed button 304, and a page return button 305. By selecting the page feed button 304 from the display screen of the first page in FIG. 14C, the screen changes to the screen of the second page in FIG.

  In each of the receivable service lists 306 and 307, a receivable service name is displayed on each button. For example, “1: A1” has a service name “A1” registered first, and the user can select this service name. By selecting the button, “A1” is received, and “A1” is displayed on the receiving service display unit 301. Since “C1” registered in the sixth and seventh positions in FIG. 14A described above can be determined as the same service by searching for information of << service link >> D3, in FIG. 14C, It is integrated so that it is not displayed twice. Similarly, the fourth “B1” in FIG. 14A and the fourth “B1” in FIG. 14B are integrated because they are simultaneous services.

  As described above, the same simul service broadcasted by FM-RDS and DAB can display a list integrated as the same service without dividing each of the FM-RDS service and DAB service as separate services. A list of services that can be received without being aware of RDS and DAB can be presented.

  In the integrated service list, a service list that can be received without being aware of FM-RDS and DAB is presented to the user, but a screen that allows the user to determine whether the currently received service is FM-RDS or DAB. Can also be displayed. For example, “FM-RDS” or “DAB” may be displayed on the receiving service display unit 301 in FIGS. In this way, when FM-RDS can be received but there is a lot of noise, the user can consciously display a list of simulcasts and select DAB simulcasts. .

  As described above, according to the present embodiment, the radio receiver 100 efficiently constructs a database relating to the simul service stored in the memory device 40 from the broadcast station identification ID of the service being received, thereby efficiently information relating to the simul service. Can be obtained quickly.

  The radio receiver of the present invention has an effect that information on simul service can be efficiently obtained, and can receive radio data multiplexing system broadcasts and digital radio broadcasts such as in-vehicle devices and portable devices. It is useful as a machine.

DESCRIPTION OF SYMBOLS 10 DAB receiving part 11 DAB front end part 12 DAB baseband process part 13 Audio decoder part 14 FIC data decoder part 20 AM / FM-RDS receiving part 21 AM / FM front end part 22 AM / FM demodulation part 23 RDS data decoder part 24 PLL demodulator 30 Control microcomputer 40 Memory device 50 Input device 60 Display device 70 Audio selector unit 100 Radio receiver 300, 310 Integrated service list

Claims (12)

In a radio receiver having an FM-RDS receiver for receiving FM-RDS broadcasting and a DAB receiver for receiving DAB,
A memory device for storing information acquired from services received by the two receiving units;
A control unit that generates an integrated service list that integrates a list of services based on information stored in the memory device without distinguishing between FM-RDS service and DAB service;
A display unit for displaying the generated integrated service list;
An input unit for a user to select a service from the displayed integrated service list;
A radio receiver characterized by comprising: The memory device includes a PI for identifying a program service, a PS indicating the name of the program service, information for calculating a reception quality level, and simultaneous DAB service information obtained by the FM-RDS receiver. The radio receiver according to claim 1, further comprising: ODA information including: The memory device includes an EId for identifying an ensemble acquired by the DAB receiver, an SId for identifying a program service, a Service Label indicating the name of the program service, a Short PS mask bit, and reception quality. 2. The radio receiver according to claim 1, wherein information for calculating a level, service link information, and OE service information are stored. 4. The radio receiver according to claim 3, wherein the control unit converts the service label and the name of the program service into 8 bytes from the Short PS mask bit. The control unit is configured to provide a service that can be received from the reception history information stored in the memory device when a tuner that is not used for audio output in the audio mode or a mode other than the audio mode, or using a second tuner having a two-tuner configuration. 4. The radio receiver according to claim 2, wherein the radio receiver searches and updates the reception history information and the information related to the simul service stored in the memory device. 4. The radio receiver according to claim 2, wherein the control unit determines the accuracy of the name based on a method of acquiring the name of the program service, and stores it in the memory device. 5. The controller extracts the service name stored in the memory device from the broadcast station identification ID of the service being received without being affected by the dynamic PS during the preset memory operation, and updates the preset memory information with the extracted service name. The radio receiver according to claim 1. The control unit notifies the user that a new service name has been acquired before updating the preset memory information with the extracted service name, and prompts the user to update the service name. The listed radio receiver. The control unit monitors reception quality related to a service being received at regular intervals, extracts an alternative frequency as a simul service candidate from the memory device, and switches to a frequency with good reception before the user can no longer listen to the broadcast content. The radio receiver according to claim 2 or 3. 2. The control unit according to claim 1, wherein the control unit determines whether each service can be received from reception history information and simul service information stored in the memory device, and generates the integrated service list for receivable services. Radio receiver. The radio receiver according to claim 10, wherein the control unit generates an integrated service list so that information on the same simul service is not displayed redundantly in the integrated service list. The radio receiver according to claim 11, wherein the display unit displays a screen that allows a user to determine whether the service currently being received is FM-RDS or DAB.

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