EP1022873A2 - Receiver for receiving both Digital Audio Broadcasts (DAB) as well as frequency modulated (FM) broadcasts comprising supplementary information - Google Patents

Receiver for receiving both Digital Audio Broadcasts (DAB) as well as frequency modulated (FM) broadcasts comprising supplementary information Download PDF

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Publication number
EP1022873A2
EP1022873A2 EP20000300468 EP00300468A EP1022873A2 EP 1022873 A2 EP1022873 A2 EP 1022873A2 EP 20000300468 EP20000300468 EP 20000300468 EP 00300468 A EP00300468 A EP 00300468A EP 1022873 A2 EP1022873 A2 EP 1022873A2
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EP
European Patent Office
Prior art keywords
broadcast
data
reception
broadcasting
digital audio
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.)
Withdrawn
Application number
EP20000300468
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German (de)
English (en)
French (fr)
Inventor
Masahi Kimoto
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.)
Sony Corp
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Sony Corp
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Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of EP1022873A2 publication Critical patent/EP1022873A2/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • 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
    • H04H60/40—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 time
    • 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

Definitions

  • the present invention relates to a broadcast receiver for receiving digital audio broadcasting in accordance with broadcast content data added to a received FM signal.
  • RDS Radio Data System
  • Encode processing for error correction is carried out on the RDS data, and a subcarrier signal having a frequency of 57 kHz, which is a value thee times a frequency of 19 kHz of a stereo pilot signal, is subjected to equilibrium modulation with the RDS data to which this encode processing has been carried out.
  • the modulated signal is added to a stereo composite signal of a main signal to be frequency multiplexed, and a main carrier signal is FM modulated by this multiplexed signal and is transmitted.
  • DAB Digital Audio Broadcasting
  • broadcasting of programs is made a hierarchical structure, for example, as shown in Fig. 1. That is, in the DAB, although one channel uses a transmission band of 1.5 MHz as described above, this transmission channel is called an "ensemble", and the ensemble is selected by tuning to the center frequency of this ensemble.
  • This ensemble is divided into groups called “services”. In the case of Fig. 1, it is divided into four services. Each service is further divided into some “service components”, and each of the service components is made a digital audio signal or digital data constituting one program.
  • one service corresponds to one of the broadcasting stations in FM broadcasting or the like, and is used in such a manner that, for example, a first service component of a first service broadcasts soccer in a first ground (program 1A), a second service component broadcasts soccer in a second ground (program 1B), ...
  • Identification codes called “ensemble ID (Identification)” and “service ID” are given to the ensemble and the service, respectively, and the data of the ensemble ID and the service ID are also transmitted. Further, a serial number is given to each service in the service components, and the serial number is transmitted.
  • a user listens to a program of the DAB, he or she selects a frequency of an ensemble, selects one service or group of a plurality of services contained in the ensemble, and further selects an objective service component, that is, a program in the selected service.
  • the service ID of the service is made identical to the PI code in the FM broadcasting.
  • the service ID of the service 1 is made identical to the PI code of the FM station A.
  • the service ID of the service 2 is made identical to the PI code of the FM station B.
  • an identifier called "LSN (Linkage Set Number)" is also transmitted.
  • LSN Linkage Set Number
  • Figs. 2A and 2B when some service of the DAB has the same content as some program of the FM broadcasting, the LSNs of both are made identical to each other.
  • the LSNs of the services 1 to 3 are respectively made identical to the LSNs of the FM stations A to C.
  • the user can listen to a program in more excellent sound quality.
  • the reception can be automatically switched from the FM broadcasting to the DAB.
  • a broadcasting station can arbitrarily change the structure of the ensemble. For example, such usage is permitted that only when there are soccer games, the service 1 is prepared and the soccer game in each ground is broadcast, and when there is no game, the service 1 is stopped, that is, it is not contained in the ensemble. Thus, there is a case where when the user tries to receive some service, the service is stopped so that it can not be received.
  • the service having the same content is detected by repeating such processing that an ensemble is detected while seeking the frequency band of the DAB, and the objective service is searched in the ensemble, and the FM broadcasting is switched to the DAB. At this time, 64 service components are prepared for the frequency band of the DAB.
  • the present invention is intended to solve such a problem.
  • the present invention has an object to provide a broadcast receiver comprising:
  • reference numeral 10 designates a DAB receiving circuit
  • reference numeral 20 designates an FM broadcast receiving circuit.
  • a broadcast signal of the DAB is received by an antenna 11, and this received signal is supplied to a tuner circuit 12.
  • This tuner circuit 12 includes a PLL (Phase Locked Loop) and is constructed into a superheterodyne form, and a reception frequency can be changed by changing a division ratio N of a variable frequency dividing circuit of the PLL.
  • a baseband signal of the DAB is extracted from this tuner circuit 12, and the baseband signal is supplied to an A/D (Analog/Digital) converter circuit 13 and is A/D converted into a digital signal.
  • A/D Analog/Digital
  • This digital signal is supplied to an orthogonal demodulating circuit 14, and data of a same phase component (real axis component) and an orthogonal component (imaginary component) are demodulated. These data are subjected to complex Fourier transform at an FFT (Fast Fourier Transform) circuit 15, and a frequency component is outputted for every symbol. The output is supplied to a Viterbi decoder circuit 16, so that de-interleave and error correction are carried out, and digital audio data of an objective service component, that is, a program are selected.
  • FFT Fast Fourier Transform
  • the selected data are supplied to an audio decoder circuit 17, decode processing such as MPEG data expansion is carried out, and the digital audio data of the objective program is extracted from the decoder circuit 17.
  • the extracted digital audio data are supplied to a D/A (Digital/Analog) converter circuit 18 and are D/A converted into audio signals L (Left) and R (Right), and the signals L and R are supplied to a switch circuit 31.
  • This switch circuit 31 is switched between the time of reception of the DAB and the time of reception of the FM broadcasting.
  • the audio signals L and R from the D/A converter circuit 18 are extracted through the switch circuit 31, and the extracted signals L and R are supplied to speakers 33L and 33R through amplifiers 32L and 32R.
  • the user can listen to a service of the DAB.
  • an FM broadcast signal is received by an antenna 21, and this received signal is supplied to a tuner circuit 22.
  • This tuner circuit 22 also includes a PLL and is structured into a superheterodyne form, and a reception frequency can be changed by changing a division ratio N of a variable frequency dividing circuit of the PLL. From this tuner circuit 22, a frequency multiplexing signal of a stereo composite signal and a modulated signal by RDS data is extracted. This multiplexing signal is supplied to a stereo demodulating circuit 23, and audio signals L and R are demodulated. The signals are supplied to the switch circuit 31.
  • the audio signals L and R from the stereo demodulating circuit 23 are extracted through the switch circuit 31, and the extracted signals L and R are supplied to the speakers 33L and 33R through the amplifiers 32L and 32R.
  • the user can listen to the FM broadcasting.
  • the signal from the tuner circuit 22 is supplied to a decoder circuit 24 and the RDS data are demodulated, and further, they are subjected to error correction and are extracted.
  • a microcomputer 41 is provided for system control, and as frequency data for selecting an ensemble (reception frequency), data of the division ratio N of the variable frequency dividing circuit in the PLL is supplied from the microcomputer 41 to the tuner circuit 12. Besides, as frequency data for setting a reception frequency, data of the division ratio N of the frequency variable dividing circuit in the PLL is supplied from the microcomputer 41 to the tuner circuit 22.
  • data necessary for identifying or specifying a service and a service component that is, data such as a service ID are extracted from the Viterbi decoder circuit 16, and the data are supplied to the microcomputer 41.
  • selection signals SSV and SSC are supplied from the microcomputer 41 to the Viterbi decoder circuit 16, and the service is selected by the signal SSV, and further, digital audio data of the objective service component are selected from the selected service by the signal SSC.
  • the RDS data outputted from the decoder circuit 24 are supplied to the microcomputer 41.
  • a memory 42 is provided in the microcomputer 41.
  • This memory 42 is, for example, a flash memory, or although not shown, a nonvolatile memory such as a RAM backed up by a battery, so that even if a power source is turned off, written data can be held.
  • a historical table HTBL including a history of ensembles received in the past is provided. That is, this historical table HTBL stores and holds a plurality of sets, each set being composed of a division ratio N of the variable frequency dividing circuit in the PLL of the tuner circuit 12, an ensemble ID, and a reception time expressed by, for example, year, month, day, and hours, as data when an arbitrary service is received.
  • the division ratio N1 at that time, the ensemble ID ENID01, and the reception time TIME01 are held at the first line.
  • the microcomputer 41 supplies the switch circuit 31 with its control signal, and a clock circuit 43 indicating the current time is connected to the microcomputer 41. Moreover, various operation keys 44 constituted by, for example, push switches are connected, and a display device for displaying various information, for example, an LCD (Liquid Crystal Display) 45 is connected.
  • LCD Liquid Crystal Display
  • the historical table HTBL is updated. That is, in the case where the selected ensemble is not contained in the historical table HTBL, one set of the dividing ratio N at that time, the ensemble ID, and the time indicated by the clock circuit 43 is added to the historical table HTBL. In the case where the selected ensemble is contained in the historical table HTBL, the reception time paired with the division ratio N at that time in the historical table HTBL, that is, the reception time at the same line is updated to the current time indicated by the clock circuit 43.
  • the set of the division ratio N, the ensemble ID, and the reception time at the last reception is registered.
  • sorting is made so that, for example, the set of data with the latest reception time becomes first.
  • the switch circuit 31 is connected to the side of the FM receiving circuit 20 by the microcomputer 41, so that the user can listen to the FM broadcasting as described above.
  • the DAB_FM link function is set ineffective, nothing is executed.
  • a procedure as set forth below is executed by the microcomputer 41.
  • step 102 it is judged whether the PI code of the RDS data has been obtained from the decoder circuit 24, and in the case where it has been obtained, the procedure proceeds from step 102 to step 103.
  • step 103 the routine 200 is executed, and in the case where the service ID or LSN identical to the PI code or LSN of the RDS data is obtained from the DAB receiving circuit 10, the service giving the service ID is selected in the DAB receiving circuit 10.
  • the processing of the microcomputer 41 starts from step 201, and next, at step 202, it is judged whether reception has been executed for all division ratios N registered in the historical table HTBL. In the case where there is a division ratio N at which reception has not been executed, the procedure proceeds from step 202 to step 203. At this step 203, the division ratio N of a frequency at which reception has not been executed in the historical table HTBL is read out from the historical table HTBL and is set in the tuner circuit 12, and the reception frequency is set.
  • step 204 it is judged whether an ensemble can be received at the current reception frequency, and when it can not be received, the procedure returns from step 204 to step 202.
  • the steps 202 to 204 are repeated until the ensemble can be received, and the ensemble is changed.
  • step 204 when it is judged that the ensemble can be received at the current reception frequency, the procedure proceeds from step 204 to step 211, and at this step 211, the historical table HTBL is updated.
  • the reception time paired with the division ratio N which is set at step 203 and gives the current reception frequency is updated by the current time indicated by the clock circuit 43.
  • step 212 it is searched whether a service having the same content as the program under reception in the FM receiving circuit 20 is contained in the services of the ensemble received by the DAB receiving circuit 10. This search is executed in such a manner that the PI code and the LSN of the RDS data outputted from the decoder circuit 24 are sequentially used as key words to search the service ID and the LSN obtained from the Viterbi decoder circuit 16.
  • step 213 The result of this search is judged at step 213, and in the case where a service having the same content as the program under reception in the FM receiving circuit 20 is not contained in the services of the ensemble received by the DAB receiving circuit 10, the procedure returns from step 213 to step 202.
  • the steps 202 to 213 are repeated until the service having the same content as the program under reception in the FM receiving circuit 20 comes to be contained in the services of the ensemble received by the DAB receiving circuit 10, and the ensemble is changed.
  • the selecting signal SSV for specifying the service having the same content as the program under reception in the FM receiving circuit 20 and the selecting signal SSC for specifying, for example, the first service component in the service are supplied to the Viterbi decoder circuit 16, so that the service is selected and the service component is selected.
  • the DAB receiving circuit 10 receives the service having the same content as the program under reception in the FM receiving circuit 20.
  • a service setting flag SFLG is set to "1"
  • this routine 200 is ended at step 223.
  • step 105 the program to which the user listens in the FM broadcasting is switched to the service having the same content in the DAB.
  • step 102 when the PI code of the RDS data can not be obtained from the decoder circuit 24, the procedure proceeds from step 102 to step 106, and switching from the FM broadcast to the DAB is not executed.
  • the FM broadcasting can be automatically switched to the service of the DAB.
  • the routines 100 and 200 it is designed such that the ensembles having been received in the past are received, and it is detected whether the objective service having the same content as the FM broadcasting is broadcast in the DAB.
  • the detection can be made in a short time, and it becomes possible to listen to the objective service through the DAB in a short time.
  • routine 200 in the case where the routine 200 is executed at step 103, and when the service having the same content as the FM broadcasting under reception can not be received from the ensemble registered in the historical table HTBL, the service having the same content as the FM broadcasting under reception is not searched any longer.
  • routine 300 shown in Fig. 7 in the case where the routine 200 is executed at step 103, and when the service having the same content as the FM broadcasting under reception can not be received in the ensemble registered in the historical table HTBL, the service having the same content as the FM broadcasting under reception is further searched from an ensemble not registered in the historical table HTBL.
  • routine 300 of Fig. 7 is also executed at step 103 of the routine 100, and steps from step 201 to step 223 are constructed similarly to the routine 200.
  • the service having the same content as the FM broadcasting under reception is contained in the ensemble registered in the historical table HTBL, the service can be selected in a short time in the manner as described above, and the FM broadcasting is switched to the DAB.
  • step 202 it is judged whether there is a division ratio N which is not registered in the historical table HTBL and at which search for services has not been executed.
  • step 331 the procedure proceeds from step 331 to step 332, and at this step 332, the division ratio N at which the service has not been searched is set in the tuner circuit 12, and then, the procedure proceeds to step 204.
  • the historical table HTBL is updated, and a set of the division ratio N, the ensemble ID, and the time indicated by the clock circuit 43 is added and registered in the historical table HTBL.
  • the ensemble received in the past is first searched, and further, all ensembles are searched, so that the search can be made in a short time without fail.
  • routine 400 is also executed at step 103 of the routine 100.
  • steps from step 201 to step 332 are constructed similarly to the routine 300, and a step 401 is provided between step 201 and step 202.
  • step 401 it is judged whether program types of services in a different ensemble are transmitted.
  • the procedure proceeds from step 401 to step 402, and at this step 402, it is searched whether a program type of a service having the same content as the FM broadcasting under reception exists in the program types of the services of the transmitted different ensemble.
  • the procedure proceeds from step 402 to step 403.
  • the reception frequency is set to the ensemble containing the service having the same content as the FM broadcasting under reception, and then, the procedure proceeds to step 204, and thereafter, the search and the reception of the service having the same content as the broadcasting under reception is executed.
  • step 401 in the case where program types of services in a different ensemble are not transmitted, or at step 402, in the case where the program type of the service having the same content as the FM broadcasting under reception does not exist in program types of services in a transmitted different ensemble, the procedure proceeds from step 401 or step 402 to step 202, and thereafter, the search process is executed as described above.
  • step 204 in the case where the ensemble can not be received, the procedure returns from step 204 to step 401.
  • step 213 in the case where the service having the same content as the FM broadcasting under reception is not contained in the ensemble under reception, the procedure returns from step 213 to step 401.
  • routine 400 in the case where the program type of the service in the different ensemble is transmitted as data of the different station, search and reception of the objective service is executed by using the data. Thus, it is possible to switch to the service having the same content as the FM broadcasting under reception in a still shorter time.
  • the reception frequency is set to the ensemble registered in the historical table HTBL, and when the ensemble can not be received, the set of the data with respective to the ensemble may be deleted from the historical table HTBL.
  • the FM broadcasting in the case where a program having the same content as FM broadcasting under reception is broadcast in digital audio broadcasting, the FM broadcasting can be automatically switched to the program of the digital audio broadcasting. In that case, the program in the digital audio broadcasting can be received in a short time. Moreover, it is possible to certainly detect the program having the same content in the digital audio broadcasting.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
EP20000300468 1999-01-22 2000-01-21 Receiver for receiving both Digital Audio Broadcasts (DAB) as well as frequency modulated (FM) broadcasts comprising supplementary information Withdrawn EP1022873A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1427699 1999-01-22
JP1427699A JP4048632B2 (ja) 1999-01-22 1999-01-22 デジタル音声放送の受信機

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EP1022873A2 true EP1022873A2 (en) 2000-07-26

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1227608A2 (de) * 2001-01-26 2002-07-31 Robert Bosch Gmbh Verfahren zur Umschaltung eines Rundfunkempfängers auf einer anderen Funkübertragung mit gleichem Audioinhalt
WO2002071664A1 (en) * 2001-03-01 2002-09-12 Knox Gregory D Wireless music and data transceiver system
WO2005086394A1 (en) * 2004-02-24 2005-09-15 Koninklijke Philips Electronics N.V. Appliance for converting digital audio broadcast (dab) signals
US6968164B2 (en) 2003-05-19 2005-11-22 Visteon Global Technologies, Inc. Method of controlling filter bandwidth in a radio receiver for a duplicative broadcast signal
US6980769B2 (en) 2003-05-19 2005-12-27 Visteon Global Technologies, Inc. Method for determining the validity of a radio station lookup table
WO2005125023A1 (de) * 2004-06-17 2005-12-29 Volkswagen Aktiengesellschaft Radio für ein kraftfahrzeug
US7043215B2 (en) 2003-05-19 2006-05-09 Visteon Global Technologies, Inc. Method of performing a fast tune for a digital broadcast station in a radio receiver
WO2007078336A2 (en) * 2005-12-15 2007-07-12 Sony Ericsson Mobile Communications Ab Methods for using broadcast multimedia content information and related broadcast multimedia receivers/playback devices
WO2010127864A1 (fr) * 2009-05-07 2010-11-11 Continental Automotive France Systeme et procede de protection contre les perturbations engendrees par des signaux fm sur la reception de signaux de bande iii
CN101521550B (zh) * 2008-02-26 2012-03-14 启碁科技股份有限公司 嵌入式多媒体系统及其相关数字广播解调装置
CN103138862B (zh) * 2007-02-20 2016-06-01 尼尔森（美国）有限公司 创建表示媒体的签名的装置和方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4916059B2 (ja) 2001-07-31 2012-04-11 キヤノン株式会社 画像処理装置
KR100667770B1 (ko) 2004-11-09 2007-01-11 삼성전자주식회사 디지털 멀티미디어 방송 수신장치 및 그 사용자인터페이스 방법

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1227608A3 (de) * 2001-01-26 2003-01-02 Robert Bosch Gmbh Verfahren zur Umschaltung eines Rundfunkempfängers auf einer anderen Funkübertragung mit gleichem Audioinhalt
EP1227608A2 (de) * 2001-01-26 2002-07-31 Robert Bosch Gmbh Verfahren zur Umschaltung eines Rundfunkempfängers auf einer anderen Funkübertragung mit gleichem Audioinhalt
WO2002071664A1 (en) * 2001-03-01 2002-09-12 Knox Gregory D Wireless music and data transceiver system
US6968164B2 (en) 2003-05-19 2005-11-22 Visteon Global Technologies, Inc. Method of controlling filter bandwidth in a radio receiver for a duplicative broadcast signal
US6980769B2 (en) 2003-05-19 2005-12-27 Visteon Global Technologies, Inc. Method for determining the validity of a radio station lookup table
US7043215B2 (en) 2003-05-19 2006-05-09 Visteon Global Technologies, Inc. Method of performing a fast tune for a digital broadcast station in a radio receiver
WO2005086394A1 (en) * 2004-02-24 2005-09-15 Koninklijke Philips Electronics N.V. Appliance for converting digital audio broadcast (dab) signals
US7844225B2 (en) 2004-06-17 2010-11-30 Volkswagen Ag Radio for a motor vehicle
WO2005125023A1 (de) * 2004-06-17 2005-12-29 Volkswagen Aktiengesellschaft Radio für ein kraftfahrzeug
WO2007078336A2 (en) * 2005-12-15 2007-07-12 Sony Ericsson Mobile Communications Ab Methods for using broadcast multimedia content information and related broadcast multimedia receivers/playback devices
US7643807B2 (en) 2005-12-15 2010-01-05 Sony Ericsson Mobile Communications Ab Methods for using broadcast media content information and related broadcast media receivers/playback devices
WO2007078336A3 (en) * 2005-12-15 2007-09-27 Sony Ericsson Mobile Comm Ab Methods for using broadcast multimedia content information and related broadcast multimedia receivers/playback devices
CN103138862B (zh) * 2007-02-20 2016-06-01 尼尔森（美国）有限公司 创建表示媒体的签名的装置和方法
CN101521550B (zh) * 2008-02-26 2012-03-14 启碁科技股份有限公司 嵌入式多媒体系统及其相关数字广播解调装置
WO2010127864A1 (fr) * 2009-05-07 2010-11-11 Continental Automotive France Systeme et procede de protection contre les perturbations engendrees par des signaux fm sur la reception de signaux de bande iii
FR2945392A1 (fr) * 2009-05-07 2010-11-12 Continental Automotive France Systeme et procede de protection contre les perturbations engendrees par des signaux fm sur la reception de signaux de bande iii
CN102414993A (zh) * 2009-05-07 2012-04-11 法国欧陆汽车公司 用于防止由fm信号对接收频带iii信号所生成的干扰的系统和方法
AU2010244693B2 (en) * 2009-05-07 2014-06-19 Continental Automotive France System and method for protecting against interference generated by FM signals in receiving band III signals
CN102414993B (zh) * 2009-05-07 2014-09-24 法国欧陆汽车公司 防止fm信号的干扰的系统和方法和带该系统的机动车无线电

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JP2000216694A (ja) 2000-08-04
JP4048632B2 (ja) 2008-02-20

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