EP1133089A2 - Récepteur de radiodiffusion - Google Patents

Récepteur de radiodiffusion Download PDF

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Publication number
EP1133089A2
EP1133089A2 EP01104756A EP01104756A EP1133089A2 EP 1133089 A2 EP1133089 A2 EP 1133089A2 EP 01104756 A EP01104756 A EP 01104756A EP 01104756 A EP01104756 A EP 01104756A EP 1133089 A2 EP1133089 A2 EP 1133089A2
Authority
EP
European Patent Office
Prior art keywords
broadcast program
information
code
received
broadcast
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.)
Granted
Application number
EP01104756A
Other languages
German (de)
English (en)
Other versions
EP1133089B1 (fr
EP1133089A3 (fr
Inventor
Tomonori c/o Clarion Co. Ltd. Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Clarion Co Ltd filed Critical Clarion Co Ltd
Publication of EP1133089A2 publication Critical patent/EP1133089A2/fr
Publication of EP1133089A3 publication Critical patent/EP1133089A3/fr
Application granted granted Critical
Publication of EP1133089B1 publication Critical patent/EP1133089B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/11—Arrangements for counter-measures when a portion of broadcast information is unavailable
    • H04H60/12—Arrangements for counter-measures when a portion of broadcast information is unavailable wherein another information is substituted for the portion of broadcast information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H04H60/43—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast channels
    • 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 broadcast receiver such as a DAB (digital audio broadcasting) receiver having a capability of seeking and receiving a broadcast program having the same content as that of a broadcast program currently being received.
  • a broadcast receiver such as a DAB (digital audio broadcasting) receiver having a capability of seeking and receiving a broadcast program having the same content as that of a broadcast program currently being received.
  • DAB digital audio broadcasting
  • one program is broadcasted at one broadcasting frequency.
  • a plurality of programs are broadcasted at one broadcasting frequency (hereinafter referred to as an ensemble).
  • a DAB receiver designed to receive DAB broadcast programs has a capability of receiving an ensemble and selecting a desired broadcast program from a plurality of broadcast programs in the received ensemble.
  • DAB data being broadcasted includes an EId (Ensemble Identifier) code identifying an ensemble, an SId (Service Identifier) code identifying a broadcast program, an LSN (Linkage Set Number) code identifying an identical broadcast program, and an area code indicating the area.
  • EId Ensemble Identifier
  • SId Service Identifier
  • LSN Linkage Set Number
  • the EId code is information indicating a linkage relationship among ensembles.
  • the SId code is information used not only to identify a broadcast program but also to link a plurality of EId codes.
  • the LSN code is information which identifies broadcast programs having an identical content among a plurality of broadcast programs and which indicates linkage among different SId codes.
  • the DAB receiver When a DAB receiver receives DAB data, the DAB receiver can detect broadcasting frequencies at which an identical program is broadcasted in a receiving area, in accordance with the received SId code, EId code, and the LSN code.
  • the DAB receiver when the DAB receiver receives EId codes and SId codes such as those shown in Fig. 5, the DAB receiver produces a network management database 30 for managing a plurality of broadcast programs in each ensemble and also broadcasting frequencies of each broadcast program.
  • the DAB receiver produces a linkage management database 40 for managing broadcast programs having the same content in accordance with received LSN codes such as those shown in Fig. 6.
  • the DAB receiver detects that the same content as that of C221 is broadcasted at C222.
  • the DAT receiver starts to seek the detected broadcasting frequency to receive the broadcast program having the same content.
  • the DAB receiver is capable of continuously receiving a broadcast program having the same content as that of the broadcast program currently being received by retrieving an SId code corresponding to the broadcast program having the same content as that currently being received using an LSN code and seeking the broadcasting frequency corresponding to the SId code.
  • the network management database 30 shown in Fig. 5 and the linkage management database 40 shown in Fig. 6 are produced in accordance with received three kinds of information, SId code, EId code, and LSN code, and a broadcast program having the same content as that of a broadcast program currently being received is sought in accordance with information stored in the databases 30 and 40.
  • a broadcast program having the same content is sought simply by scanning all broadcasting frequencies without using obtained information. This can cause a problem that no program is received for a long period of time until a broadcast program having the same content is captured.
  • a broadcast receiver having a capability of seeking and receiving a broadcast program having the same content as that of a broadcast program currently being received, the broadcast receiver comprising: information storage means for extracting first information, which associates a plurality of broadcasting frequencies with each other, from a received signal and storing the extracted first information; retrieval means for, if degradation occurs in a receiving condition of a broadcast program currently being received, retrieving another broadcasting frequency associated with a current broadcasting frequency in accordance with the first information; and seeking means for seeking the broadcasting frequency retrieved by the retrieval means so as to receive a broadcast program having the same content as that of the broadcast program currently being received.
  • this broadcast receiver if degradation in the receiving condition of a broadcast program currently being received occurs, another frequency associated with a current broadcasting frequency is retrieved on the basis of the first information which associates a plurality of broadcasting frequencies, and the retrieved broadcasting frequency is sought to receive a broadcast program having the same content as that of the broadcast program currently being received.
  • first information EId code
  • a broadcast receiver having a capability of seeking and receiving a broadcast program having the same content as that of a broadcast program currently being received, the broadcast receiver comprising: information storage means for extracting, from a received signal, first information which associates a plurality of broadcasting frequencies with each other and second information identifying respective broadcast programs and storing the extracted first and second information; retrieval means for, if degradation occurs in a receiving condition of a broadcast program currently being received, retrieving another broadcasting frequency at which the same content as that of the broadcast program currently being received is broadcasted, in accordance with the first and second information; and seeking means for seeking the broadcasting frequency retrieved by the retrieval means so as to receive a broadcast program having the same content as that of the broadcast program currently being received.
  • this broadcast receiver if degradation occurs in the receiving condition of a broadcasting program currently being received, another broadcasting frequency, at which a program having the same content as that currently being received is broadcasted, is retrieved in accordance with the first information which associates a plurality of broadcasting frequencies and the second information identifying the broadcast program, and the retrieved broadcasting frequency is sought to receive a broadcast program having the same content as that of the broadcast program currently being received.
  • a broadcast receiver having a capability of seeking and receiving a broadcast program having the same content as that of a broadcast program currently being received, the broadcast receiver comprising: information storage means for extracting, from a received signal, first information which associates a plurality of broadcasting frequencies with each other, second information identifying respective broadcast programs and third information which associates the second information with each other, and storing the extracted first, second and third information; first retrieval means for, if degradation occurs in a receiving condition of a broadcast program currently being received, retrieving another broadcasting frequency associated with a current broadcasting frequency in accordance with the first information; second retrieval means for, if degradation occurs in the receiving condition of the broadcast program currently being received, retrieving another broadcasting frequency which is associated with the current broadcasting frequency and at which the same content as that of the broadcast program currently being received is broadcasted, in accordance with the first and second information; third retrieval means for, if degradation occurs in the receiving condition of the broadcast program currently being received, retrieving another broadcasting frequency which is
  • proper retrieval means is selected, depending upon the information storage status, from the first retrieval means for retrieving a broadcast frequency on the basis of the first information, the second retrieval means for retrieving a broadcast frequency on the basis of the first and second information, and the third retrieval means for retrieving a broadcast frequency on the basis of the first, second and third information.
  • this broadcast receiver when degradation occurs in a receiving condition of a broadcast program currently being received, if no information other than the second information is stored in the information storage means, seeking is performed by scanning all broadcasting frequencies in accordance with the second information.
  • Fig. 1 is a block diagram illustrating an internal structure of a DAB receiver according to an embodiment of the present invention.
  • the DAB receiver 10 includes a receiving antenna 11 for receiving a DAB program; a DAB front end 12 for converting a receiving frequency of the DAB program into an intermediate frequency and amplifying it; a DAB decoder 13 for extracting DAB data from the output of the DAB front end 12, an audio decoder 14 for extracting an audio signal from the output of the DAB front end 12, a D/A converter 15 for converting the audio signal into analog form, an amplifier 16 for amplifying the audio signal converted into analog form, a speaker 17 for outputting a sound in accordance with the audio signal amplified by the amplifier 16, a BER detector 18 for detecting a BER in accordance with the output of the DAB front end 12, a display 19 for displaying various kinds of information, an operation control unit 20 for inputting various commands, and a controller 21 responsible for controlling the entire DAB receiver 10.
  • the DAB receiver 10 when the DAB receiver 10 receives an ensemble, the DAB receiver 10 selects a desired broadcast program from a plurality of broadcast programs contained in the received ensemble.
  • the controller 21 produces a network management database 30 such as that shown in Fig. 2 (Fig. 5) in accordance with an SId code and an EId code included in the DAB data extracted by the DAB decoder 13, and also produces a linkage management database 40 in accordance with an LSN code and an SId code included in the DAB data extracted by the DAB decoder 13.
  • the controller 21 stores the resultant network management database 30 and the linkage management database 40.
  • the controller 21 determines that degradation occurs in the receiving condition of the broadcast program currently being received, and the controller 21 seeks a broadcast program having the same content as that of the broadcast program currently being received in accordance with information stored in the network management database 30 and the linkage management database 40.
  • the network management database 30 and the linkage management database 40 can be stored as shown in Figs. 5 and 6 as descried earlier with reference to the conventional technique.
  • the controller 21 produces the network management database 30 such as that shown in Fig. 2 in accordance with the SId code and the EId code but the controller 21 does not produce the linkage management database 40 such as that shown in Fig. 6.
  • the controller 21 When only an EId code was obtained but neither an SId code nor an LSI code was obtained, the controller 21 produces a network management database 30A including no SId code data such as that shown in Fig. 3, and the controller 21 does not produce the linkage management database 40.
  • the information storage means descried in the appended claims includes the DAB decoder 13 for extracting DAB data and the controller 21 for storing the network management database 30 and the linkage management database 40 produced in accordance with an SId code, an EId code, and an LSN code extracted by the DAB decoder 13.
  • the retrieval means, the first retrieval means, the second retrieval means, the third retrieval means, and the selection means are realized by the controller 21.
  • the seeking means is formed of the DAB front end 12 and the controller 21 which controls the front end 21.
  • Fig. 4 is a flow chart illustrating an operation performed by the DAB receiver 10 to seek a broadcast program having the same content according to the present embodiment.
  • This operation is performed, when degradation in the receiving condition of a broadcast program currently being received is detected, to quickly seek and receive a broadcast program having the same content as that of the broadcast program currently being received.
  • step S11 if the controller 21 detects degradation in the receiving condition of a broadcast program currently being received (hereinafter, such a program will be referred to as a last SId) (step S11), the controller 21 searches the linkage management database 40 for an LSN code corresponding to the last SId in order to receive a broadcast program having the same content as that of the last SId (step S12). The controller 21 then determines whether an LSN code has been successfully retrieved from the linkage management database 40 (step S13).
  • the controller 21 searches the network management database 30 for an SId code of a broadcast program which has the same content as that of the last SId and which is contained in another ensemble included in the acquired LSN code (step S14), and the controller 21 determines (in step S15) whether an SId code having the same content and included in another ensemble has been successfully retrieved from the network management database 30.
  • the controller 21 retrieves a broadcasting frequency corresponding to the acquired SId code (step S16), and the controller 21 determines (in step S17) whether a broadcasting frequency has been successfully acquired from the network management database 30.
  • the DAB receiver 10 acquires DAB data including all of an EId code, an SId code and an LSN code, and the network management database 30 and the linkage management database 40 are produced, for example, as shown in Figs. 5 and 6, and thus the broadcasting frequency is acquired from the network management database 30 and the linkage management database 40.
  • step S17 the controller 21 seeks the acquired broadcasting frequency (step S18) and determines (in step S19) whether a broadcast program having the same content as that of the last SId has been captured as a result of the seeking process.
  • the controller 21 performs setting so as to receive the captured broadcast program (step S20), and thus the operation is completed.
  • an SId code associated with a broadcast program having the same content as that of the last SId but included in another ensemble other than the current ensemble is retrieved from the network management database 30 in accordance with the last SId (step S21), and it is determined (in step S22) whether an SId code in another ensemble has been successfully retrieved from the network management database 30 (step S22).
  • a broadcasting frequency corresponding to the obtained SId code is then retrieved (step S23), and it is determined (in step S24) whether a broadcasting frequency has been successfully retrieved from the network management database 30.
  • the DAB receiver 10 acquires DAB data including only an EId code and an SId code.
  • the linkage management database 40 is not produced, and only the network management database 30 is produced and stored, for example, such as shown in Fig. 2 (Fig. 5), and thus the broadcasting frequency is acquired from the network management database 30.
  • step S24 If it is determined in step S24 that a broadcasting frequency has been successfully retrieved, the process goes to step S18 to seek the obtained broadcasting frequency.
  • step S22 In the case where it is determined in step S22 that an SId code in another ensemble is not found, another broadcasting frequency is retrieved from the network management database 30A in accordance with the last SId and the last EId (step S25).
  • the DAB receiver 10 obtains DAB data including only an EId code, and only the network management database 30A such as that shown in Fig. 3 is produced and stored without producing the linkage management database 40, and the broadcasting frequency is obtained only on the basis of the network management database 30A.
  • step S26 It is determined (in step S26) whether a broadcasting frequency has been successfully retrieved from the network management database 30A as a result of the retrieval process in step S25.
  • step S18 the process goes to step S18 to seek the obtained broadcasting frequency.
  • step S27 seeking by means of scanning all broadcasting frequencies is started (step S27) and the process goes to step S19.
  • step S15 In the case where it is determined in step S15 that an SId code in another ensemble is not found in the network management database 30, or in the case where it is determined in step S17 that a broadcasting frequency corresponding to the SId code is not found in the network management database 30, the process goes to step S21 to search the network management database 30 in accordance with the last SId to retrieve an SId code included in another ensemble and having the same content as that of the last SId.
  • step S24 In the case where it is determined in step S24 that a broadcasting frequency corresponding to the SId code is not found in the network management database 30, the process goes to step S25 to search the network management database 30 in accordance with the last SId and the last EId to retrieve a broadcasting frequency in another ensemble.
  • step S19 In the case where it is determined in step S19 that a broadcast program having the same content as that of the last SId was not captured, the process returns to step S12.
  • the obtained EId is fully used such that a plurality of broadcasting frequencies contained in an ensemble other than that containing a broadcast program which has encountered degradation in the receiving condition are retrieved and a broadcast program having the same content is quickly sought and received on the basis of the retrieved broadcast frequencies without scanning all broadcasting frequencies.
  • the obtained EId code and the SId code are fully used such that a broadcasting frequency associated with a broadcast program having the same content of that of a current broadcast program which has encountered degradation in the receiving condition is retrieved from a plurality of broadcasting frequencies contained in an ensemble other than an ensemble containing the current broadcast program, and the broadcast program having the same content is quickly sought and received on the basis of the retrieved broadcast frequency without scanning all broadcasting frequencies.
  • the obtained code(s) is/are fully used depending upon the obtained code(s) so as to quickly seek and receive a broadcast program having the same content without scanning all frequencies.
  • the present invention provides great advantages. That is, in the broadcast receiver according to the present invention, even when an LSN code and an SId code are not obtained, if first information (EId code) is obtained, the obtained first information is fully used such that a plurality of broadcasting frequencies contained in an ensemble other than that containing a broadcast program which has encountered degradation in the receiving condition are retrieved and a broadcast program having the same content is quickly sought and received on the basis of the retrieved broadcast frequencies without scanning all broadcasting frequencies.
  • SId code first information
  • the broadcast receiver even when an LSN code is not obtained, if an EId code and an SId code are obtained, the obtained EId code and the SId code are fully used such that a broadcasting frequency associated with a broadcast program having the same content of that of a current broadcast program which has encountered degradation in the receiving condition is retrieved from a plurality of broadcasting frequencies contained in an ensemble other than an ensemble containing the current broadcast program, and the broadcast program having the same content is quickly sought and received on the basis of the retrieved broadcast frequency without scanning all broadcasting frequencies.
  • an obtained code(s) is/are fully used depending upon which code of EId, SId, and LSN codes is obtained, so as to quickly seek and receive a broadcast program having the same content without scanning all frequencies.
  • seeking is performed by scanning all broadcasting frequencies so as to seek and receive a broadcast program having the same content.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Television Receiver Circuits (AREA)
  • Noise Elimination (AREA)
EP01104756A 2000-03-01 2001-02-26 Récepteur de radiodiffusion Expired - Lifetime EP1133089B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000055890A JP4260328B2 (ja) 2000-03-01 2000-03-01 放送受信装置
JP2000055890 2000-03-01

Publications (3)

Publication Number Publication Date
EP1133089A2 true EP1133089A2 (fr) 2001-09-12
EP1133089A3 EP1133089A3 (fr) 2002-01-23
EP1133089B1 EP1133089B1 (fr) 2007-01-17

Family

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Family Applications (1)

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EP01104756A Expired - Lifetime EP1133089B1 (fr) 2000-03-01 2001-02-26 Récepteur de radiodiffusion

Country Status (3)

Country Link
EP (1) EP1133089B1 (fr)
JP (1) JP4260328B2 (fr)
DE (1) DE60126003T2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1551105A1 (fr) * 2002-10-09 2005-07-06 Kabushiki Kaisha Kenwood Poste recepteur de radiodiffusion numerique
EP1659819A2 (fr) * 2004-11-19 2006-05-24 LG Electronics Inc. Transfert du canal de diffusion dans des systèmes de communication mobiles
EP1679812A2 (fr) 2005-01-07 2006-07-12 Samsung Electronics Co., Ltd. Procédé pour fournir un service de radiodiffusion et récepteur de radiodiffusion associé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907265A2 (fr) * 1997-10-02 1999-04-07 Robert Bosch Gmbh Récepteur de radiodiffusion RDS avec une mémoire pour les fréquences alternatives et méthode pour organiser la mémoire
JPH11234227A (ja) * 1998-02-10 1999-08-27 Alpine Electron Inc ラジオ放送受信方法
EP0946011A2 (fr) * 1998-03-23 1999-09-29 Pioneer Electronic Corporation Récepteur pour la réception de programmes radiophoniques numériques et de programmes radiophoniques en modulation de fréquence comportant des données supplémentaires
EP0989695A2 (fr) * 1998-09-24 2000-03-29 Sony Corporation Récepteur pour la réception de programmes de radiodiffusion numérique DAB

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907265A2 (fr) * 1997-10-02 1999-04-07 Robert Bosch Gmbh Récepteur de radiodiffusion RDS avec une mémoire pour les fréquences alternatives et méthode pour organiser la mémoire
JPH11234227A (ja) * 1998-02-10 1999-08-27 Alpine Electron Inc ラジオ放送受信方法
EP0946011A2 (fr) * 1998-03-23 1999-09-29 Pioneer Electronic Corporation Récepteur pour la réception de programmes radiophoniques numériques et de programmes radiophoniques en modulation de fréquence comportant des données supplémentaires
EP0989695A2 (fr) * 1998-09-24 2000-03-29 Sony Corporation Récepteur pour la réception de programmes de radiodiffusion numérique DAB

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Digital Audio Broadcasting (DAB); VHF/FM Broadcasting: cross-referencing to simulcast DAB services by RDS-ODA 147" DRAFT ETSI EN 301 700 V1.1.1, October 1999 (1999-10), XP014003746 *
[Online] XP002183025 Retrieved from the Internet: <URL: www.worlddab.org/rarchive/products/carradi os_grundig3.html> [retrieved on 2001-11-15] * the whole document * *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1551105A1 (fr) * 2002-10-09 2005-07-06 Kabushiki Kaisha Kenwood Poste recepteur de radiodiffusion numerique
EP1551105A4 (fr) * 2002-10-09 2011-07-20 Kenwood Corp Poste recepteur de radiodiffusion numerique
EP1659819A2 (fr) * 2004-11-19 2006-05-24 LG Electronics Inc. Transfert du canal de diffusion dans des systèmes de communication mobiles
EP1659819A3 (fr) * 2004-11-19 2007-04-25 LG Electronics Inc. Transfert du canal de diffusion dans des systèmes de communication mobiles
CN100438668C (zh) * 2004-11-19 2008-11-26 Lg电子株式会社 移动通信终端中的广播频道切换
US7970416B2 (en) 2004-11-19 2011-06-28 Lg Electronics Inc. Broadcasting channel handover in mobile communication terminal
EP1679812A2 (fr) 2005-01-07 2006-07-12 Samsung Electronics Co., Ltd. Procédé pour fournir un service de radiodiffusion et récepteur de radiodiffusion associé
EP1679812A3 (fr) * 2005-01-07 2011-04-06 Samsung Electronics Co., Ltd. Procédé pour fournir un service de radiodiffusion et récepteur de radiodiffusion associé

Also Published As

Publication number Publication date
DE60126003T2 (de) 2007-08-23
EP1133089B1 (fr) 2007-01-17
DE60126003D1 (de) 2007-03-08
EP1133089A3 (fr) 2002-01-23
JP2001244831A (ja) 2001-09-07
JP4260328B2 (ja) 2009-04-30

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