EP0954131B1 - Récepteur de radiodiffusion comportant à la fois un récepteur pour la radiodiffusion numérique DAB et pour la réception d'émissions à modulation de fréquence avec un décodeur de signaux RDS - Google Patents
Récepteur de radiodiffusion comportant à la fois un récepteur pour la radiodiffusion numérique DAB et pour la réception d'émissions à modulation de fréquence avec un décodeur de signaux RDS Download PDFInfo
- Publication number
- EP0954131B1 EP0954131B1 EP99303248A EP99303248A EP0954131B1 EP 0954131 B1 EP0954131 B1 EP 0954131B1 EP 99303248 A EP99303248 A EP 99303248A EP 99303248 A EP99303248 A EP 99303248A EP 0954131 B1 EP0954131 B1 EP 0954131B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- broadcast
- specific program
- dab
- priority
- receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]
Definitions
- the present invention relates to a digital-broadcast receiving system, and more particularly to a receiving system for receiving at least a digital audio broadcast (hereinafter called "DAB”) which is at the practical phase in Europe.
- DAB digital audio broadcast
- the DAB system As a system for transmitting broadcasting waves including data signals including digital audio signals and formed into a predetermined format and receiving the broadcasting waves, the DAB system abided by the Europe Standard (Eureka 147) is available.
- the DAB one ensemble is composed of a plurality of services. Each service is composed of a plurality of components, such as English and German.
- Fig. 3 shows an example of the structure of services of the DAB system, in which a state of linking among services (three in this case) and components (six in this case) constituting an ensemble 1 and an OFDM signal transmitted from a DAB station is shown.
- the OFDM signal transmitted from the DAB station includes FIC (Fast Information Channel) and MSC (Main Service Channel).
- Sub-channels (SubChO to 63) constituting the MSC has the correspondence with the foregoing components.
- the FIC includes information about the services which can be used by the ensemble and information indicating the link among the services, components and sub-channels.
- the DAB enables information about the plural services and components included in an ensemble to be obtained if a certain ensemble can be received. Therefore, instantaneous switching to a different service or a component is permitted without a necessity of changing the frequency.
- an interruption receiving function into a specific program of, for example, traffic information is available.
- information indicating whether or not the service which is being received supports a specific program such as traffic information or emergency information, and information indicating a fact that a program is being broadcast can be included in a variety of information data items included in the FIC.
- alarm, road traffic flash and news flash are defined as the specific programs.
- a receiver When a receiver has an operating means for turning on/off a function for priority-receiving the specific program and a user sets the receiver to execute the function for performing the priority-receiving function, the receiver determines start of the specific program in the service which is being selected in accordance with an ASW (Announcement Switching) flag in the FIC.
- ASW Announcement Switching
- An RDS receiver uses a TP flag indicating whether or not traffic information is supported and a TA flag indicating start and end of traffic information are used to realize the interruption function.
- a receiving system incorporating an FM receiver having an RDS decoder and a DAB receiver enables each receiver to independently determine start of the specific program.
- control can be performed such that when an instructed program has been started in either of the receivers, reproduced sound from the receiver is given priority so as to be output from the speaker unit.
- the foregoing receiving system encounters a problem in that the broadcast for receiving the program must be determined.
- the sound quality is considerably different between the FM broadcast and the DAB broadcast and the DAB broadcast exhibits superior sound quality. Therefore, it is not preferable that a simple control method is employed with which the broadcast in which start of the program has been detected is reproduced.
- WO-A-9309615 discloses a digital broadcast receiving system with FM and DAB receiving portions and a control unit giving priority to one receiving portion over the other.
- an object of the present invention is to provide a receiving system which is capable of reliably selecting a DAB broadcast if broadcasting of a specific program has been started on an FM broadcast and the DAB broadcast.
- Another object of the present invention is to provide a receiving system which permits reliable interruption if a specific program is broadcast by either of broadcasts.
- a digital-broadcast receiving system comprising:
- a digital-broadcast receiving system having a structure as set forth in the another aspect of the invention, wherein the control unit determines to start the specific program when the specific program can be received.
- Fig. 1 is a block diagram showing a digital-broadcast receiving system incorporate an RDS receiving portion according to the embodiment of the present invention.
- the receiving system incorporates a DAB receiving portion for receiving a digital broadcast, an FM receiving portion for receiving an RDS broadcast, a system control unit 1, a switching portion 2, an amplifier 3, a speaker unit 4, a storage portion 5 and a CD player 31.
- the DAB receiving portion includes a DAB-FE (a DAB front end) 11 for controlling synchronization with a DAB station; an A/D converter for converting a received analog signal into a digital signal; an FFT (Fast Fourier Transform) portion 13 for demodulating an OFDM wave; a Viterbi decoding portion 14 for correcting an error; and an audio decoder (Musicam Decoder) 15 for restoring compressed audio data (Musicam Data) to original audio data. Since the above-mentioned structure is a known fact disclosed in documents, the foregoing structure is omitted from description.
- the FM receiving portion incorporates an FM-FE (an FM front end) 21 for controlling synchronization with an FM station; an FM-wave detector 22 for amplifying an intermediate-frequency (IF) signal to detect a composite signal from the foregoing signal; and an RDS decoder 23 for extracting an RDS signal from the composite signal to demodulate the RDS signal.
- FM-FE an FM front end
- IF intermediate-frequency
- RDS decoder 23 extracting an RDS signal from the composite signal to demodulate the RDS signal.
- the above-mentioned structure is a known fact disclosed in documents, the foregoing structure is omitted from description.
- the RDS decoder 23 outputs decoded data to the system control unit 1.
- the system control unit 1 controls the DAB receiving portion and the FM receiving portion. Moreover, the system control unit 1 reads FIC information supplied from the DAB receiving portion to store various information data items included in data above in the storage portion 5.
- Information to be stored includes information about the services which can be used by the ensemble, information about linking among the services, components and sub-channels, information about FM stations (PI code information and FI (Frequency Information) list information), Asu (Announcement support) information indicating whether or not specific programs are supported and Asw information which is information for determining start of a specific program.
- the system control unit 1 controls the switching portion 2.
- the basic control is performed such that when start of the specific program on the DAB broadcast has been detected, sound reproduced from the DAB receiving portion is selectively output if another source, such as a CD, is being selected.
- sound reproduced from the FM receiving portion is selectively output.
- Output reproduced sound is amplified by the amplifier 3 so as to be output through the speaker unit 4.
- the digital-broadcast receiving system has the above-mentioned schematic structure.
- Fig. 2 is a flow chart of a priority interruption to the specific program. Note that the foregoing flow chart is periodically executed when an instruction to turn on the interruption function to the specific program has been issued from a user.
- the system control unit 1 determines that the priority order is given to the DAB or the RDS.
- step S2 When the priority order is given to the RDS, whether or not the RDS broadcast supports the specific program is determined (step S2). Specifically, the TP code of the RDS station which is being received is determined so that the foregoing determination is made. Note that the priority order is given to the DAB in an initial stage. The priority order may be given to the RDS by operating the operation portion.
- step S3 When the RDS broadcast supports the specific program, whether or not the specific program has been started on the RDS broadcast is determined (step S3). Specifically, the TA code of the RDS station which is being received is determined so that the foregoing determination is performed.
- a switching signal is output to the switching portion 2 so as to output reproduced sound from the RDS receiving portion (step S4).
- the so-called interruption receiving operation is performed such that reproduced sound from the FM receiver is given priority to be selected though, for example, sound reproduced from the CD player 31 has been selected by the switching portion 2.
- step S3 If start of the specific program on the RDS broadcast is not detected at present in step S3, the current process is completed.
- step S5 a process conversing to step S2 is performed to determine whether or not the instructed specific program is supported by the DAB broadcast (step S5). Specifically, the foregoing determination is performed in accordance with Asu information in received FIC data.
- step S6 whether or not the specific program has been started on the DAB broadcast is determined.
- the foregoing determination can be performed in accordance with Asw information in received FIC data.
- a switching signal is output to the switching portion 2 to select sound of the corresponding program so as to output sound through the speaker unit 4 (step S7).
- the interruption receiving operation is performed.
- step S2 If a determination is made in step S2 that the RDS broadcast does not support the specific program, the operation is shifted to step S9 so that whether or not the DAB broadcast supports the specific program is determined. If the DAB broadcast supports the specific program, whether or not the specific program has been started on the DAB broadcast is determined (step S6). If a determination is made in step S5 that the DAB broadcast does not support the specific program, the operation is shifted to step S8 to determine whether or not the RDS broadcast supports the specific program. If the RDS broadcast supports the specific program, the operation is shifted to step S3 so that whether or not the specific program has been started on the RDS broadcast is determined.
- the broadcast having the lower priority order is considered only when a determination is made that the upper broadcast does not support the specific program.
- the RDS broadcast is not considered as far as the DAB broadcast supports the specific program. Therefore, if the RDS broadcast starts broadcasting the specific program simultaneously or slightly earlier, the DAB broadcast can always be listened. If the specific program is broadcast on only either of the broadcasts, interruption can reliably be performed.
- the present invention is not limited to the foregoing structure.
- a similar process can be performed if interruption of another program, such as news, is performed.
- the RDS broadcast has a structure that a code corresponding to the TP code is not assigned to the programs except for traffic information. Therefore, control from which step S2 shown in Fig. 2 is omitted is performed.
- the instructed specific program is the same program (traffic information) for the DAB broadcast and the RDS broadcast.
- the present invention is not limited to the foregoing structure. If a plurality of programs are instructed and an instructed news program has been started on the DAB broadcast and instructed traffic information program has been started on the RDS broadcast, priority can be given to the DAB broadcast.
- reproduced sound of a broadcast wave given high priority can always be listened in a case a specific program has simultaneously been started on a plurality of broadcast waves.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
Claims (1)
- Système de réception de diffusion numérique comprenant :une partie de réception FM (21, 22, 23), incluant un décodeur RDS (23), pour recevoir une diffusion RDS et sortir un signal audio FM et une partie de réception DAB (11, 13, 14, 15) pour recevoir une diffusion audio numérique et sortir un signal audio DAB, chaque partie de réception ayant une fonction de réception d'interruption capable de détecter indépendamment le début d'un programme spécifique à l'intérieur des signaux audio respectifs ;une partie de commutation (2) pour sélectionner le signal audio FM ou le signal audio DAB pour la sortie ;un moyen de détermination d'ordre de priorité pour déterminer un ordre de priorité qui est donné à la diffusion RDS ou à la diffusion audio numérique ;un moyen d'instruction pour permettre à un utilisateur d'allumer la fonction de réception d'interruption pour un programme spécifique afin de donner ainsi pour instruction de sortir le programme spécifique ; etune unité de commande (1) pour commander la partie de commutation pour sélectionner la sortie soit du signal audio FM soit du signal audio DAB conformément à un résultat d'une instruction effectuée par ledit moyen d'instruction et à l'ordre de priorité de sorte qu'un programme spécifique détecté par la fonction de réception d'interruption et donné pour instruction par le moyen d'instruction soit sorti par la partie de commutation,dans lequel l'unité de commande (1) détermine si le programme spécifique peut être reçu ou non via la diffusion qui s'est vue donner l'ordre de priorité élevée et si oui, l'unité de commande commande la partie de commutation pour sortir le programme spécifique via la diffusion qui s'est vue donner l'ordre de priorité élevée, et seulement lorsque le programme spécifique ne peut pas être reçu via la diffusion ayant l'ordre de priorité élevée, l'unité de commande détermine si le programme spécifique peut être reçu ou non via la diffusion ayant un ordre de priorité faible et si oui, l'unité de commande commande la partie de commutation pour sortir le programme spécifique via la diffusion ayant un ordre de priorité faible ; etdans lequel le moyen de détermination d'ordre de priorité est configuré pour changer l'ordre de priorité sur la base d'une opération prédéterminée de l'unité de commande.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13453198A JP3591810B2 (ja) | 1998-04-28 | 1998-04-28 | ディジタル放送受信システム |
JP13453198 | 1998-04-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0954131A2 EP0954131A2 (fr) | 1999-11-03 |
EP0954131A3 EP0954131A3 (fr) | 2001-04-25 |
EP0954131B1 true EP0954131B1 (fr) | 2012-05-30 |
Family
ID=15130508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99303248A Expired - Lifetime EP0954131B1 (fr) | 1998-04-28 | 1999-04-27 | Récepteur de radiodiffusion comportant à la fois un récepteur pour la radiodiffusion numérique DAB et pour la réception d'émissions à modulation de fréquence avec un décodeur de signaux RDS |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0954131B1 (fr) |
JP (1) | JP3591810B2 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001059943A1 (fr) * | 2000-01-28 | 2001-08-16 | Kabushiki Kaisha Kenwood | Recepteur de radiodiffusion numerique |
DE10103400A1 (de) * | 2001-01-26 | 2002-08-14 | Bosch Gmbh Robert | Verfahren zur Audioserviceumschaltung bei einem Rundfunkempfänger |
EP1233556A1 (fr) * | 2001-02-16 | 2002-08-21 | Sony International (Europe) GmbH | Récepteur pour la réception d'émissions radiophoniques comportant deux récepteurs, pour la réception d'un signal radiophonique qui est transmis sur deux fréquences différentes ou avec deux systèmes de transmission différents |
EP1370016B1 (fr) * | 2002-06-07 | 2005-04-20 | Sony International (Europe) GmbH | Procédé et appareil pour la réception d'un signal audio transmis à la fois en modulation analogique et numérique d'une qualité supérieure, avec une commutation graduelle du digital au numérique en cas de mauvais état du canal, de façon à rendre le changement moins perceptible |
JP5921467B2 (ja) * | 2013-03-07 | 2016-05-24 | 三菱電機株式会社 | 放送受信装置および割り込み判定方法 |
CN111209244B (zh) * | 2018-11-21 | 2022-05-06 | 上海寒武纪信息科技有限公司 | 数据处理装置及相关产品 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE163114T1 (de) * | 1991-11-01 | 1998-02-15 | Thomson Consumer Electronics | Rundfunkübertragungssystem und rundfunkempfänger |
DE4136068A1 (de) * | 1991-11-01 | 1993-05-06 | Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover, De | Rundfunkuebertragungssystem und rundfunkempfaenger fuer ukw-fm und digitalen rundfunk (dab) |
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1998
- 1998-04-28 JP JP13453198A patent/JP3591810B2/ja not_active Expired - Fee Related
-
1999
- 1999-04-27 EP EP99303248A patent/EP0954131B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP3591810B2 (ja) | 2004-11-24 |
EP0954131A2 (fr) | 1999-11-03 |
EP0954131A3 (fr) | 2001-04-25 |
JPH11312996A (ja) | 1999-11-09 |
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