EP0618693A1 - Dispositif de commande du champ sonore et de contrôle de tonalité pour récepteur de radiodiffusion en modulation de fréquence utilisant des signaux RDS - Google Patents

Dispositif de commande du champ sonore et de contrôle de tonalité pour récepteur de radiodiffusion en modulation de fréquence utilisant des signaux RDS Download PDF

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Publication number
EP0618693A1
EP0618693A1 EP94302227A EP94302227A EP0618693A1 EP 0618693 A1 EP0618693 A1 EP 0618693A1 EP 94302227 A EP94302227 A EP 94302227A EP 94302227 A EP94302227 A EP 94302227A EP 0618693 A1 EP0618693 A1 EP 0618693A1
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EP
European Patent Office
Prior art keywords
rds
signal
data
sound field
tone
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Withdrawn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
EP94302227A
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German (de)
English (en)
Inventor
Kazuto Koide
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.)
Victor Company of Japan Ltd
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Victor Company of Japan Ltd
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Filing date
Publication date
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Publication of EP0618693A1 publication Critical patent/EP0618693A1/fr
Withdrawn legal-status Critical Current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
    • H04H20/28—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
    • H04H60/13—Arrangements for device control affected by the 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
    • H04H60/47—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 recognising genres
    • 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
    • H04H60/61—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54
    • H04H60/65—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54 for using the result on users' side
    • 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]

Definitions

  • the present invention relates to a sound field and tone control device for an FM radio receiver and, particularly, to a device which is suitable for use in an FM radio receiver in which a selection of broadcasting station and display of RDS (radio data system) data are performed by using RDS data multiplexed with an FM signal to provide it with a function of automatically setting an optimum sound field and tone correspondingly to a code contained in the RDS data and indicating a content thereof such as broadcasting programs, etc.
  • RDS radio data system
  • the RDS system was developed as a broadcasting system for mainly car radio use. That is, in a case where a car is travelling for a long distance trip while receiving an FM broadcasting, a receiver's tuning frequency set to a certain broadcasting station (first station) needs to be retuned manually to a new station (second station) which is broadcasting the same program as the car goes out of service area of the first station and entering into that of the second station.
  • first station a receiver's tuning frequency set to a certain broadcasting station
  • second station new station
  • EBU adopted and defined the RDS system as to satisfy the following conditions:
  • a DSB (double side band) modulation signal is produced through steps shown in Fig. 4 and multiplexed with a main FM broadcasting signal. That is, a transmission basic clock A [Fig. 4(A)] of 1.1875 kHz is first encoded with RDS data B [Fig. 4(B)] to produce a differentially encoded RDS data C [Fig. 4(C)], and a bi-phase PSK signal D [Fig. 4(D)] is obtained by bi-phase PSK (phase-shift keying) modulation of the encoded RDS data C using the clock A. Then, the bi-phase PSK signal D is high-pass filtered to obtain a signal E [Fig. 4(A)] of 1.1875 kHz is first encoded with RDS data B [Fig. 4(B)] to produce a differentially encoded RDS data C [Fig. 4(C)], and a bi-phase PSK signal D [Fig. 4(D)] is obtained by bi-phase PSK (phase-shift keying)
  • a suppressed carrier modulated signal (DSB modulated signal) F [Fig. 4(F)] is obtained by double sideband modulation of a sub-carrier (57 kHz) with the signal E. Both sidebands of the DSB modulated signal F are multiplexed with the main FM broadcasting signal and transmitted.
  • the resultant RDS signal F [DSB modulated signal] is simply one of modulated signals included (multiplexed) in the FM broadcasting signal in the frequency spectrum thereof, and a degree of modulation of the main carrier of the FM broadcasting with the RDS signal is as low in standard as about 2.7% ( ⁇ 2 kHz), thus it does not affect the broadcast main FM signal (a composite signal composed of a main channel signal, a sub-channel signal and a pilot signal).
  • the sub-carrier (57 kHz) of the RDS data is set in phase or quadrature at the third harmonic of the pilot signal (19 kHz).
  • the main purpose of the RDS system is to give an automatic tuning function to the FM radio receivers, and a function of displaying RDS data content (name of the broadcasting station and the program content, etc.) on the receivers is incidentally utilized, but any more positive utilization of the RDS data in the side of FM receivers has been attempted.
  • FM receivers which have graphic equalizer circuits and tone control circuits to provide a various sound fields and tones.
  • sound field and tone control are performed manually, and once they are adjusted, they are often forgotten and not readjusted. Therefore, under such situation, listening to FM broadcasting with sound field and tone optimum to the broadcast program is very rare.
  • RDS data In a broadcasting of RDS system, such as PTY or M/S included in RDS data have a close relationship with sound field and tone of a reproduced sound and it is possible to perform a discrimination between program content, music and speech by utilizing such data to thereby reproduce the program with sound field and tone optimum to the broadcast content making the FM radio reception more enjoyable.
  • a general object of the present invention is to provide a sound field and tone control device for use in an FM radio receiver, which can automatically and in real-time control sound field and tone of a reproduced sound optimal by utilizing an identification signal which is multiplexed with an FM signal such as RDS and which is indicative of a content of broadcasting program and/or kind of sound.
  • Another and specific object of the present invention is to provide a sound field and tone control device for use in an FM radio receiver, which comprises signal detection means for detecting identification signals multiplexed with an FM signal, which are indicative of content of a broadcasting program and/or kind of sound, decoding means for decoding the identification signal detected by the signal detection means, memory means for storing sound and tone control data prepared correspondingly to decoded data of the respective identification signals multiplexed with the FM signal and control means for reading the sound field and tone control data stored in the memory means correspondingly to the decoded data therein, on the basis of the decoded data of the identification signals obtained from the decoding means, and controlling a variable sound field and tone circuit of the FM radio receiver by using the control data thus read out.
  • the identification signal indicative of a content of a broadcasting program multiplexed with the FM signal and/or kind of sound it becomes possible to output a reproduced signal as an audio sound having optimal sound field and tone to the content of a broadcast audio signal and a kind thereof.
  • the identification signal multiplexed with the FM signal is detected by the signal detection means and decoded by the decoding means.
  • the memory means functions to convert the decoded identification signal into control data for the variable sound field and tone circuit, the control data having a content for realizing an optimal sound field and tone correspondingly with the identification information.
  • Fig. 1 shows a system circuit diagram of an FM receiver (stereo car-radio receiver) responsive to an RDS broadcasting system.
  • the FM receiver includes a front end 1 composed of a radio frequency amplifier (RF AMP) 2, a mixer (MIX) 3 and a local oscillator (LOCAL OSC) 4.
  • the front end 1 tunes to an FM broadcasting signal received at an antenna 5, amplifies it and converts it into an intermediate frequency signal (10.7 MHz).
  • the intermediate frequency signal is amplified by an intermediate frequency amplifier (1F AMP) 6 and then detected by an FM detector (FM DET) 7, resulting in a low frequency signal.
  • the low frequency signal is a composite signal including a main channel signal (L+R; up to 15 kHz or lower), a sub-channel signal (L-R; DSB of 23 - 38 kHz and 38 - 53 kHz) and a pilot signal (19 kHz).
  • a stereo demodulator (MPX) 8 which demodulates an L signal and an R signal by using the pilot signal since the receiver is an FM stereo receiver.
  • the demodulated L and R signals are supplied to a reproduction circuit having an L channel and an R channel.
  • the L channel includes a graphic equalizer circuit 9L for adding reverberation by causing a signal delay, a tone control circuit 10L, a power amplifier 11L and a loud speaker 12L and the R channel includes, correspondingly to the L channel, a graphic equalizer circuit 9R, a tone control circuit 10R, a power amplifier 11R and a loud speaker 12R.
  • the equalizer circuits 9L and 9R and the tone control circuits 10L and 10R are controlled by a microcomputer circuit 13.
  • the FM radio receiver In order to make the FM radio receiver compatible with the RDS broadcasting system, it includes an RDS signal detection section 14 and an RDS decoder 15.
  • the RDS signal detection section 14 includes an RDS sub-carrier detection circuit 16, a switching signal generator circuit 17 and a switching circuit 18.
  • the sub-carrier detection circuit 16 detects a sub-carrier (57 kHz) upon which the switching signal generator circuit 17 generates a switching signal having the same frequency as that of the sub-carrier.
  • the switching circuit 18 switches the output of the FM detector 7 with a timing of the switching signal to detect the RDS signal F [DSB modulated RDS signal] shown in Fig. 4(F).
  • the RDS decoder 15 demodulates the signal through a process in a reversed order of the modulation scheme shown in Fig. 4 and outputs the RDS data.
  • the microcomputer circuit 13 includes an I/O port (including an A/D converter and a D/A converter) 19, a RAM 20, a ROM 21 and a CPU 22.
  • the ROM 21 stores a system control program for controlling the receiver as a whole and stores, in a table format, tuning and display data and sound field and tone control data prepared correspondingly to various RDS data. This embodiment is featured by the fact that the ROM 21 stores the sound field and tone control data.
  • An LCD control section 23 functions to display the various RDS data obtained by the microcomputer circuit 13 on an LCD 24 and a controller 25 functions to output manual control data to the microcomputer circuit 13 through an interface I/F 26.
  • Fig. 2 is a flowchart showing operating procedures of RDS data display and automatic tuning functions.
  • station tuning and sound field and tone control settings can be selectively performed through the controller 25 in an automatic control mode or a manual control mode, it is assumed in this embodiment that the automatic control mode is selected.
  • the RDS signal detection section 14 detects the RDS signal and the microcomputer circuit 13 acquires the RDS data from the RDS decoder 15 every constant time period ⁇ T (for example, every 0.5 sec.) and stores them in the RAM 20 (steps S1, S2).
  • the CPU 22 renews the RDS data previously stored in the RAM 20 every time new RDS data is acquired through the I/0 port 19.
  • the CPU 22 outputs display data to the LCD control section 23 through the I/0 port 19 by using the display control data corresponding to the RDS data to renew a display content on the LCD 24 (step S3).
  • the network designation corresponding to PI of the RDS data, the name of the broadcasting station corresponding to PS thereof, the kind of program ("news”, “sports", “music”, etc.) identified by PTY thereof, the frequency of receiving station obtained by PS and AF thereof and the date and time using CT, etc., are displayed on the LCD 24.
  • the radio receiver is a car radio thus moving in this embodiment, the field strength reduces as a distance from the broadcasting station increases.
  • the CPU 22 checks whether the field strength becoming a predetermined level or lower than that (step S4) and retuning of the front end 1 is needed, and if it is "YES” it executes retuning of the front end 1 by using tuning control data corresponding to PI, AF and EON of the RDS data stored in the RAM 20 (step S5).
  • the tuning frequency of the front end is shifted sequentially through those of broadcasting stations which are in the same network as that of the previously tuned station and are broadcasting programs of the same content and the tuning frequency of the front end is fixed to one of them having a highest field strength.
  • step S6 to S1 since the above mentioned procedures are executed every ⁇ T time period (steps S6 to S1), renewed RDS data are displayed on the LCD 24 sequentially and thus it is possible to listen always the broadcasting program under the best receiving condition.
  • the latest RDS data is stored in the RAM 20 of the microcomputer circuit 13 every ⁇ T time period according to the procedures shown in Fig. 2.
  • the RDS data in the RAM 20 is sequentially rewritten in the above mentioned procedures.
  • the CPU 22 confirms PTY and M/S of the RDS data every time it is rewritten, and reads out the preliminary stored sound field and tone control data corresponding to the confirmed data, and controls sound field and tone condition optimal to the program content, the music or the speech by controlling the graphic equalizer circuits 9L and 9R and the tone control circuits 10L and 10R (steps S11, S12).
  • the program content confirmed from PTY is a news program
  • sound field is adjusted to a state close to a monaural output and significant.audio signal components of the voice of announcer or newscaster are enhanced in frequency spectrum to make the voice more legible.
  • the program content is music or sport
  • sound field and tone with vivid presence are produced by setting a full frequency range of the reproduced signal in stereo and/or by performing sound field processing for adding reverberation effect.
  • the sound field and tone control device of the FM radio receiver which is constituted as mentioned previously, there are provided advantages over the conventional system.
  • an FM signal is multiplexed with identification signals indicative of a broadcasting program content and/or kind of sound as in the RDS system broadcasting

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
EP94302227A 1993-03-31 1994-03-29 Dispositif de commande du champ sonore et de contrôle de tonalité pour récepteur de radiodiffusion en modulation de fréquence utilisant des signaux RDS Withdrawn EP0618693A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP97156/93 1993-03-31
JP9715693A JPH06291692A (ja) 1993-03-31 1993-03-31 Ｆｍラジオ受信機における音場・音質制御装置

Publications (1)

Publication Number Publication Date
EP0618693A1 true EP0618693A1 (fr) 1994-10-05

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299248A (en) * 1995-03-23 1996-09-25 Blaupunkt Werke Gmbh Radio receiver
EP0762681A2 (fr) * 1995-08-26 1997-03-12 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co. KG. Méthode et circuit pour changer de programme pendant les interruptions brèves du signal
DE19809522A1 (de) * 1998-03-05 1999-09-09 Volkswagen Ag Rundfunkempfänger und Verfahren zum Betreiben desselben
EP0967748A2 (fr) * 1998-06-26 1999-12-29 Nippon Columbia Co., Ltd. Méthode et dispositif pour la radiodiffusion de signaux multiplexés comportant des signaux audiophoniques et des données, dispositif de réception pour capter ces signaux multiplexés et dispositif pour l'enregistrement sélectif des signaux audiophoniques
EP0999650A2 (fr) * 1998-10-21 2000-05-10 Robert Bosch Gmbh Récepteur de radiodiffusion RDS , et procedé pour influencer la caracteristique des signaux audio dans un récepteur de radiodiffusion
GB2414123A (en) * 2004-05-11 2005-11-16 Radioscape Ltd Controlling audio reproduction in a receiver by means of broadcast program type codes
EP1631120A2 (fr) * 2004-08-31 2006-03-01 Delphi Technologies, Inc. Système et procédé pour régler automatiquement les paramètres acoustiques d'un système audio
US7996567B2 (en) 2003-03-31 2011-08-09 Sony United Kingdom Limited Audio processing
US8929558B2 (en) 2009-09-10 2015-01-06 Dolby International Ab Audio signal of an FM stereo radio receiver by using parametric stereo

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2000269773B2 (en) * 2000-09-18 2006-03-02 Phonak Ag Method for controlling a transmission system, use of this method, transmission system, receiving unit and hearing aid
JP5358781B2 (ja) * 2010-02-01 2013-12-04 株式会社ユピテル マイクロ波検出器及びその調整方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6462922A (en) * 1987-09-02 1989-03-09 Fujitsu Ten Ltd Automatic sound quality adjustor for rds radio receiver
GB2215927A (en) * 1988-03-16 1989-09-27 British Broadcasting Corp Improvements to RDS radio receivers
JPH03106129A (ja) * 1989-09-20 1991-05-02 Mitsubishi Electric Corp ラジオデータシステム受信機
EP0503154A2 (fr) * 1991-03-14 1992-09-16 Pioneer Electronic Corporation Récepteur RDS
EP0558918A2 (fr) * 1992-02-29 1993-09-08 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Récepteur de radiodiffusion pour RDS avec dispositif d'adaptation de volume en mode de réception EON

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6462922A (en) * 1987-09-02 1989-03-09 Fujitsu Ten Ltd Automatic sound quality adjustor for rds radio receiver
GB2215927A (en) * 1988-03-16 1989-09-27 British Broadcasting Corp Improvements to RDS radio receivers
JPH03106129A (ja) * 1989-09-20 1991-05-02 Mitsubishi Electric Corp ラジオデータシステム受信機
EP0503154A2 (fr) * 1991-03-14 1992-09-16 Pioneer Electronic Corporation Récepteur RDS
EP0558918A2 (fr) * 1992-02-29 1993-09-08 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Récepteur de radiodiffusion pour RDS avec dispositif d'adaptation de volume en mode de réception EON

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 272 (E - 777) 22 June 1989 (1989-06-22) *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 299 (E - 1095) 30 July 1991 (1991-07-30) *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299248A (en) * 1995-03-23 1996-09-25 Blaupunkt Werke Gmbh Radio receiver
FR2732172A1 (fr) * 1995-03-23 1996-09-27 Blaupunkt Werke Gmbh Recepteur radiophonique dont l'etage basses frequences comprend un decodeur stereo avec une commande par microprocesseur
GB2299248B (en) * 1995-03-23 1997-03-26 Blaupunkt Werke Gmbh Radio receiver
EP0762681A2 (fr) * 1995-08-26 1997-03-12 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co. KG. Méthode et circuit pour changer de programme pendant les interruptions brèves du signal
EP0762681A3 (fr) * 1995-08-26 2000-01-26 GRUNDIG Aktiengesellschaft Méthode et circuit pour changer de programme pendant les interruptions brèves du signal
DE19809522A1 (de) * 1998-03-05 1999-09-09 Volkswagen Ag Rundfunkempfänger und Verfahren zum Betreiben desselben
DE19809522B4 (de) * 1998-03-05 2007-11-08 Volkswagen Ag Rundfunkempfänger und Verfahren zum Betreiben desselben
EP0967748A3 (fr) * 1998-06-26 2004-12-08 Denon, Ltd. Méthode et dispositif pour la radiodiffusion de signaux multiplexés comportant des signaux audiophoniques et des données, dispositif de réception pour capter ces signaux multiplexés et dispositif pour l'enregistrement sélectif des signaux audiophoniques
US6680931B1 (en) 1998-06-26 2004-01-20 Denon, Ltd. Data multiplex broadcasting method, data multiplex broadcasting system, receiving device, and recording device
EP0967748A2 (fr) * 1998-06-26 1999-12-29 Nippon Columbia Co., Ltd. Méthode et dispositif pour la radiodiffusion de signaux multiplexés comportant des signaux audiophoniques et des données, dispositif de réception pour capter ces signaux multiplexés et dispositif pour l'enregistrement sélectif des signaux audiophoniques
EP0999650A3 (fr) * 1998-10-21 2001-12-19 Robert Bosch Gmbh Récepteur de radiodiffusion RDS , et procedé pour influencer la caracteristique des signaux audio dans un récepteur de radiodiffusion
EP0999650A2 (fr) * 1998-10-21 2000-05-10 Robert Bosch Gmbh Récepteur de radiodiffusion RDS , et procedé pour influencer la caracteristique des signaux audio dans un récepteur de radiodiffusion
US7996567B2 (en) 2003-03-31 2011-08-09 Sony United Kingdom Limited Audio processing
GB2414123A (en) * 2004-05-11 2005-11-16 Radioscape Ltd Controlling audio reproduction in a receiver by means of broadcast program type codes
WO2005109635A1 (fr) * 2004-05-11 2005-11-17 Radioscape Limited Procede de reproduction audio dans un recepteur au moyen d'un egaliseur audio
GB2414123B (en) * 2004-05-11 2008-11-12 Radioscape Ltd A method of audio reproduction at a receiver using an audio-equaliser
EP1631120A2 (fr) * 2004-08-31 2006-03-01 Delphi Technologies, Inc. Système et procédé pour régler automatiquement les paramètres acoustiques d'un système audio
EP1631120A3 (fr) * 2004-08-31 2008-01-02 Delphi Technologies, Inc. Système et procédé pour régler automatiquement les paramètres acoustiques d'un système audio
US8929558B2 (en) 2009-09-10 2015-01-06 Dolby International Ab Audio signal of an FM stereo radio receiver by using parametric stereo
US9877132B2 (en) 2009-09-10 2018-01-23 Dolby International Ab Audio signal of an FM stereo radio receiver by using parametric stereo

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