EP0172095A1 - Verfahren und Einrichtung zur Übertragung kodierter Informationen über einen Funkkanal durch Überlagerung auf eine herkömmliche FM-Übertragung - Google Patents

Verfahren und Einrichtung zur Übertragung kodierter Informationen über einen Funkkanal durch Überlagerung auf eine herkömmliche FM-Übertragung Download PDF

Info

Publication number
EP0172095A1
EP0172095A1 EP85401547A EP85401547A EP0172095A1 EP 0172095 A1 EP0172095 A1 EP 0172095A1 EP 85401547 A EP85401547 A EP 85401547A EP 85401547 A EP85401547 A EP 85401547A EP 0172095 A1 EP0172095 A1 EP 0172095A1
Authority
EP
European Patent Office
Prior art keywords
signals
coded
frequency
transmitted
coded information
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
EP85401547A
Other languages
English (en)
French (fr)
Other versions
EP0172095B1 (de
Inventor
Dimitri Baranoff-Rossine
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT85401547T priority Critical patent/ATE64048T1/de
Publication of EP0172095A1 publication Critical patent/EP0172095A1/de
Application granted granted Critical
Publication of EP0172095B1 publication Critical patent/EP0172095B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H04H20/33—Arrangements for simultaneous broadcast of plural pieces of information by plural channels
    • H04H20/34—Arrangements for simultaneous broadcast of plural pieces of information by plural channels using an out-of-band subcarrier signal

Definitions

  • the subject of the present invention is a method and a device for transmitting coded information over the air over a traditional frequency modulation transmission.
  • the invention relates more particularly to a method of transmitting coded information over the air in superposition to a traditional transmission in frequency modulation, according to which one modulates in a predetermined frequency range coded information to be transmitted to create modulated coded signals, the modulated coded signals are mixed with the low frequency signals of a traditional program to be broadcast in frequency modulation, the signals delivered by a frequency modulation receiver are filtered to isolate said modulated coded signals, the modulated coded signals are demodulated filtered, and the transmitted encoded information is displayed or recorded, by application of the filtered and demodulated encoded signals to a display or recording unit.
  • the present invention aims precisely to remedy the aforementioned drawbacks and to allow, without altering the quality of a conventional radio broadcast in frequency modulation, to transmit securely, additional coded information capable of supplementing the conventional radio broadcast.
  • a method of the type defined at the head of the description characterized in that the coded information to be transmitted is modulated by displacement of frequencies in a range of frequencies between approximately 15 and 18 kHz, in that the coded signals modulated by displacement of frequencies are mixed with an attenuation from 2D to 40dB compared to the maximum level of transmission with said low frequency signals of a traditional program, and in that the ratio between the frequency excursion of the coded signals modulated by displacement of frequency expressed in herz and the transmission speed of the coded information to be transmitted, expressed in bauds, is kept between approximately 85 and 120% and preferably close to 100%.
  • the signals modulated by displacement of frequencies are applied downstream of the stereophonic filters of the transmitter in frequency modulation in order to mix these modulated signals and the signals of a traditional broadcast program.
  • the reception signals to be filtered are taken upstream of the de-emphasis circuits of the standard frequency modulation receiver.
  • the filtered and demodulated reception signals can be displayed on a computer terminal with the help of which the control of the filtering characteristics can be controlled.
  • a radio transmission device of coded information superimposed on a traditional frequency modulation transmission comprises, in accordance with the invention, an input unit for generating coded information to be transmitted, an FSK coder-modulator for modulating by coded frequency the coded information to be transmitted , in a frequency range between about 15 to 18 kHz, a mixer circuit for superimposing with a 2D attenuation at 40 dB the signals modulated by frequency displacement on a low frequency signal of a traditional program to be applied to a transmitter frequency broadcasting, a decoder comprising filtering circuits and an FSK demodulator for separating the coded information from the signals delivered by a receiver in standard frequency modulation, and a display or recording unit for displaying or recording of coded transmitted, filtered and demodulated information.
  • the display unit can be a standard television receiver or the display unit of a computer terminal provided with a peri-computer socket and if necessary an adaptation circuit.
  • a link may be provided between said computer terminal ensuring the display of the coded information transmitted and the programmable filters of the decoder for the sending of programmable control codes.
  • the decoder further comprises a level adapter arranged at the input and two level control members arranged on either side of the filtering circuits.
  • the device according to the invention lends itself to the transmission of coded information representing for example the title of a disc, an advertising message, or utility information.
  • the coded message which is preferably transmitted repetitively using a looped transmission, may include various control characters or non-displayable coded characters.
  • a conventional transmitter 20 in frequency modulation provided with an antenna 21, and intended to receive by a line 11 low frequency electrical signals representing a radio program to be broadcast and coming from a microphone or a unit for reading recorded information such as a turntable 10 or a tape or cassette recorder.
  • the radio program is simply transmitted in a conventional manner by the FM transmitter 20 and its antenna 21.
  • digital signals coded on the program signals applied by line 11 are superimposed, before frequency modulation transmission, in a mixer 32, so that the FM transmitter then receives via line 33 a mixture of conventional low frequency signals and coded signals.
  • the coded signals can be very easily formed from plain text messages using a conventional computer terminal 40 equipped with a keyboard and capable of delivering on a line 41 signals coded according to a preset code, by example in RTTY code according for example to an R5 232 format.
  • the terminal 40 may include a conventional unit allowing storage and management of texts.
  • the coded signals can also come directly from a memory or other recording medium.
  • the coded signals can be formed from the reading of a bar code using an optical reading device.
  • the coded signals can be constituted by coded signals which cannot be decoded after transmission by radio but which are already present in the recording medium read in the reading device 10 for the radio transmission by the transmitter 20.
  • the signals from the reading device 10 can also be applied by the line 11a to a decoder 12 suitable for decoding encoded discs, cassettes or magnetic tapes.
  • the signals coming from the decoder 12 by the line 4la which include a coded message can then be used to supply the coder 30 intended to receive the coded signals transmitted by the line 41.
  • the encoder 30 essentially comprises a modulator 34 of the FSK type (frequency shift modulation) so as to transmit on line 31 coded signals characterized by two predetermined frequency levels.
  • the FSK modulator 34 is designed in such a way that the frequency levels of the coded signals are situated between approximately 15 kHz and 18 kHz and that the level of the coded signals of line 31 is attenuated by 20 to 40 dB for take into account the level curve of the LF signals usually transmitted by line 11 (see Figure 6). In this way, after mixing in the mixer 32, with the LF signals present on line 11, the coded signals of line 31 do not affect the quality of the conventional radio broadcast and are not removed by the filters either. conventional frequency modulation transmitters or receivers.
  • the introduction of the coded signals can be carried out directly in the FM transmitter 20, by the line 31a in dotted lines on the Figure 1, downstream of the stereophonic filters.
  • the mixer 32 of FIG. 1 is naturally eliminated and the line 33 transmits the same signals as the line 11.
  • the reinjection of coded signals after the stereophonic filters of the FM transmitter makes it possible then to facilitate the separation of the coded signals on reception, thanks to the gain obtained in the frequency band of the FSK modulated coded signals.
  • FIG. 2 schematically shows the elements of the receiving assembly of a device according to the invention.
  • These elements essentially comprise a standard frequency modulation receiver 120 with its antenna 121, a decoder 50 and a display unit 60 which may be a standard television receiver or a computer terminal provided with a peri-computer input.
  • to the decoder 50 can be taken from an audio socket by a line 51 or, preferably, by a line 51a, in dotted lines in FIG. 2, before the de-emphasis circuits of the receiver 120, which makes it possible to have a gain of in the range of 10 to 15 dB in the frequency band containing the coded signals.
  • the coded signals which in the 5D decoder, are separated from the conventional radio message, are applied to the display unit 60 by a line 52 and can then appear in clear on the screen. At the same time, the listener can listen to the usual radio program.
  • the 5D decoder can if necessary be integrated into the housing of the FM receiver 120.
  • the display unit 60 is constituted by a computer terminal, it is also possible to send coded signals from control at the decoder 50 by the line 53 from the terminal 60, in order to adapt to different reception cases and control for example the programming of the quality factor or of the central frequency of the filter contained in the decoder.
  • a recording unit constituted for example by a memory can be substituted or associated with the display unit 60 to record the coded signals coming from the demodulator 50.
  • FIG. 3 shows the constituent elements of the decoder 50.
  • a level adapter 55 receives via an input capacitor 54 the complex signals delivered on the lines 51 or 51a by the FM receiver 120, as previously indicated.
  • the output of the level adapter 55 is connected to filter circuits 56 which are preferably programmable band-pass filters with capacitor switching associated with a clock 57.
  • the programming of the filters can be carried out once and for all, at using keys, but can also be adapted by the user, if the unit 60 is constituted by a computer terminal.
  • Level control elements 63, 64 are respectively disposed before and after the filter circuits 56.
  • An FSK demodulator 58 with phase loop is placed at the output of the filters 56 and of the error correction circuits 59 sensitive to coded signals. error correction can optionally be placed at the output of the FSK demodulator 58.
  • Adapters 61, 62 depending on the type of display unit 60 are interposed between the output of the decoder 50 and line 52a, 52 respectively provided to lead to two display units 60 of different type.
  • FIG. 4 shows a particular example of an FSK modulator which can be incorporated into the encoder 30 of FIG. 1.
  • This modulator 34 is built around a standard basic circuit, for example the XR2206 circuit from the company EXAR - and has characteristics adaptable using external resistors and capacitors.
  • the coded signals are applied to input 35 and the FSK modulated output signals having a sinusoidal shape are available on an output 36. Rectangular output signals are available on an output 37 for control purposes.
  • the FSK modulator 34 can comprise a basic circuit with current switches 131, a frequency-controlled oscillator circuit (VCD) 132 and a multiplier and setting circuit 133 in aususoidale form.
  • VCD frequency-controlled oscillator circuit
  • the external components can then include resistors or potentiometers 141 to 144 and a frequency adjustment capacitor 145, resistors or potentiometers 151 to 153 and a capacitor 154 for adjusting the output signal level, as well as resistors or potentiometers 161, 162 for adjusting the shape and symmetry of the sinusoidal output signal, aiming to obtain minimum distortion.
  • the ratio between the frequency excursion of the signals modulated by frequency shift expressed in herz and the speed of transmission of the coded information to be transmitted , expressed in baud is between approximately 85 and 120% and preferably close to 100%.
  • the frequency offset caused by the FSK modulator is for example + 150Hz.
  • FIG. 5 shows in more detail an exemplary embodiment of a decoder-demodulator circuit 50 with a clock 57 comprising a frequency reference element 70 mounted in parallel on a capacitor 71 and inverting logic gates 73, 74, 75 associated with resistors 77, 79, capacitors 72, 78 and an output circuit 76 constituted by a frequency divider (for example by 9) which makes it possible to deliver clock pulses of the order of 1MHz, for example at a frequency of 8MHz divided by 9.
  • a frequency divider for example by 9
  • the assembly 56 of the filtering circuits comprises first and second filters 56a, 56b with switching of capacitors and which can be constituted for example by the circuits R5620 of the company RETICON.
  • the characteristics of the programmable filters 56a, 56b can be determined by switches, as shown in FIG. 5 or, as indicated previously, by control signals from the terminal 60.
  • the filters 56a, 56b can be of the bandpass type or high pass.
  • the demodulator 58 shown in FIG. 5 has a conventional configuration with an input preamplifier 81, a frequency-controlled circuit (VCD) 80, phase and quadrature detectors 83, a filter 84 for detecting locking, filters loop, and data 85, 86, a latch condition detection comparator 88, an internal reference circuit 89 and a FSK comparator 87 delivering output signals corresponding to the demodulated transmitted coded signals.
  • VCD frequency-controlled circuit
  • FSK comparator 87 delivering output signals corresponding to the demodulated transmitted coded signals.
  • the coded information to be transmitted is transmitted in a repeating loop.
  • the coded message transmitted will advantageously include control characters, including an image erasure code, placed before each message phase, as well as an end of message signaling code.
  • the transmitted coded message comprises non-displayable coded characters and the transmitted non-displayable coded characters are recorded by applying filtered and demodulated signals to a memory unit. This can help, for example, to facilitate the measurement of listening rates of radio stations identified by a specific code.
  • the invention is particularly suitable for the use of the decoder-demodulator in combination with a personal computer terminal such as for example that known under the name ALCATEL 250.
  • the control characters include a character ensuring the configuration of the personal terminal in roll mode.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
  • Circuits Of Receivers In General (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
EP85401547A 1984-07-30 1985-07-29 Verfahren und Einrichtung zur Übertragung kodierter Informationen über einen Funkkanal durch Überlagerung auf eine herkömmliche FM-Übertragung Expired - Lifetime EP0172095B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401547T ATE64048T1 (de) 1984-07-30 1985-07-29 Verfahren und einrichtung zur uebertragung kodierter informationen ueber einen funkkanal durch ueberlagerung auf eine herkoemmliche fm¨bertragung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8412092A FR2568432B1 (fr) 1984-07-30 1984-07-30 Procede et dispositif de transmission d'informations codees par voie hertzienne en superposition a une emission traditionnelle en modulation de frequence
FR8412092 1984-07-30

Publications (2)

Publication Number Publication Date
EP0172095A1 true EP0172095A1 (de) 1986-02-19
EP0172095B1 EP0172095B1 (de) 1991-05-29

Family

ID=9306637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401547A Expired - Lifetime EP0172095B1 (de) 1984-07-30 1985-07-29 Verfahren und Einrichtung zur Übertragung kodierter Informationen über einen Funkkanal durch Überlagerung auf eine herkömmliche FM-Übertragung

Country Status (6)

Country Link
EP (1) EP0172095B1 (de)
JP (1) JPS6199446A (de)
AT (1) ATE64048T1 (de)
CA (1) CA1253920A (de)
DE (1) DE3582979D1 (de)
FR (1) FR2568432B1 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2619662A1 (fr) * 1987-08-19 1989-02-24 Bernard Alain Procede de transmission d'informations relatives aux courses et recepteur pour la mise en oeuvre de ce procede
WO1989007374A1 (en) * 1988-02-08 1989-08-10 Robert John Suffern Apparatus for transmitting information
EP0338917A1 (de) * 1988-04-22 1989-10-25 Denis Marinier Kommunikationsverfahren und Anordnung mit in analogen oder digitalen Signalen integrierten Unterträgern
DE3937515A1 (de) * 1989-10-16 1991-04-25 Falter & Funk Gmbh Co Verfahren zur uebertragung von audioinformationen und/oder digitalen informationen und vorrichtung zur ausfuehrung des verfahrens
EP0548471A1 (de) * 1991-12-20 1993-06-30 BOSCH-SIEMENS HAUSGERÄTE GmbH Rundfunkempfangsgerät zum bestimmungsgemässen Empfang von Hörfunkprogrammen
GR910100504A (el) * 1991-12-18 1993-08-31 Baranoff Rossine Dimitri Μεθοδος και διαταξh για ραδιομεταδοση κωδικοποιημενων δεδομeνων τοποθετουμενων επι παραδοσιακου πομπου διαμορφωμενης συχνοτητος.
ES2048043A2 (es) * 1991-08-14 1994-03-01 Baranoff Rossine Proceso y dispositivo para la radio transmision de datos codificados superpuestos sobre una radiodifusion tradicional de frecuencia modulada
EP0606703A1 (de) * 1993-01-12 1994-07-20 Lee S. Weinblatt Verfahren zur Einschaltquotenschätzung für Rundfunk-oder Fernsehprogramme mit Programmidentifizierungssignalen im Tonkanal
EP0639933A2 (de) * 1993-08-19 1995-02-22 Samsung Electronics Co., Ltd. Verfahren und Gerät zur Verarbeitung von Audiosignalen durch Rundum-Betriebsarten
US6850555B1 (en) 1997-01-16 2005-02-01 Scientific Generics Limited Signalling system
US7460991B2 (en) 2000-11-30 2008-12-02 Intrasonics Limited System and method for shaping a data signal for embedding within an audio signal
US7505823B1 (en) 1999-07-30 2009-03-17 Intrasonics Limited Acoustic communication system
US7796978B2 (en) 2000-11-30 2010-09-14 Intrasonics S.A.R.L. Communication system for receiving and transmitting data using an acoustic data channel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3512297C2 (de) * 1985-04-04 1994-03-10 Grundig Emv Einrichtung zum Empfang von Zusatzinformationen im Hörrundfunk
US8248528B2 (en) 2001-12-24 2012-08-21 Intrasonics S.A.R.L. Captioning system
GB2460306B (en) 2008-05-29 2013-02-13 Intrasonics Sarl Data embedding system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066076A1 (de) * 1981-06-02 1982-12-08 Texas Instruments Incorporated Integriertes Modem für frequenzangetastete Signale

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066076A1 (de) * 1981-06-02 1982-12-08 Texas Instruments Incorporated Integriertes Modem für frequenzangetastete Signale

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON BROADCASTING, vol. BC-27, no. 4, décembre 1981, pages 65-70, New York, US; H.R. ANDERSON et al.: "A technique for digital information broadcasting using SCA channels" *
RADIO AND ELECTRONIC ENGINEER, vol. 52, no. 6, juin 1982, pages 291-296, Londres, GB; S.R. ELY: "The impact of radio-data on broadcast receivers" *
RUNDFUNKTECHNISCHE MITTEILUNGEN, vol. 28, no. 2, mars-avril 1984, pages 69-73, Norderstedt, DE; J. MIELKE: "Die übertragung von Zusatzinformationen im UKW-Hörrundfunk" *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2619662A1 (fr) * 1987-08-19 1989-02-24 Bernard Alain Procede de transmission d'informations relatives aux courses et recepteur pour la mise en oeuvre de ce procede
WO1989007374A1 (en) * 1988-02-08 1989-08-10 Robert John Suffern Apparatus for transmitting information
EP0338917A1 (de) * 1988-04-22 1989-10-25 Denis Marinier Kommunikationsverfahren und Anordnung mit in analogen oder digitalen Signalen integrierten Unterträgern
FR2630604A1 (fr) * 1988-04-22 1989-10-27 Marinier Denis Procede et dispositif de communication, par sous-porteuses integrees dans un signal analogique ou numerique
WO1989010662A1 (fr) * 1988-04-22 1989-11-02 Denis Marinier Procede et dispositif de communication, par sous-porteuses integrees dans un signal analogique ou numerique
DE3937515A1 (de) * 1989-10-16 1991-04-25 Falter & Funk Gmbh Co Verfahren zur uebertragung von audioinformationen und/oder digitalen informationen und vorrichtung zur ausfuehrung des verfahrens
ES2048043A2 (es) * 1991-08-14 1994-03-01 Baranoff Rossine Proceso y dispositivo para la radio transmision de datos codificados superpuestos sobre una radiodifusion tradicional de frecuencia modulada
GR910100504A (el) * 1991-12-18 1993-08-31 Baranoff Rossine Dimitri Μεθοδος και διαταξh για ραδιομεταδοση κωδικοποιημενων δεδομeνων τοποθετουμενων επι παραδοσιακου πομπου διαμορφωμενης συχνοτητος.
EP0548471A1 (de) * 1991-12-20 1993-06-30 BOSCH-SIEMENS HAUSGERÄTE GmbH Rundfunkempfangsgerät zum bestimmungsgemässen Empfang von Hörfunkprogrammen
US5630203A (en) * 1993-01-12 1997-05-13 Weinblatt; Lee S. Technique for surveying a radio or a television audience
EP0606703A1 (de) * 1993-01-12 1994-07-20 Lee S. Weinblatt Verfahren zur Einschaltquotenschätzung für Rundfunk-oder Fernsehprogramme mit Programmidentifizierungssignalen im Tonkanal
US5826164A (en) * 1993-01-12 1998-10-20 Weinblatt; Lee S. Technique for surveying a radio or a television audience
EP0639933A2 (de) * 1993-08-19 1995-02-22 Samsung Electronics Co., Ltd. Verfahren und Gerät zur Verarbeitung von Audiosignalen durch Rundum-Betriebsarten
EP0639933A3 (de) * 1993-08-19 1995-11-02 Samsung Electronics Co Ltd Verfahren und Gerät zur Verarbeitung von Audiosignalen durch Rundum-Betriebsarten.
US6850555B1 (en) 1997-01-16 2005-02-01 Scientific Generics Limited Signalling system
US7796676B2 (en) 1997-01-16 2010-09-14 Intrasonics Limited Signalling system
US7505823B1 (en) 1999-07-30 2009-03-17 Intrasonics Limited Acoustic communication system
US7460991B2 (en) 2000-11-30 2008-12-02 Intrasonics Limited System and method for shaping a data signal for embedding within an audio signal
US7796978B2 (en) 2000-11-30 2010-09-14 Intrasonics S.A.R.L. Communication system for receiving and transmitting data using an acoustic data channel
US8185100B2 (en) 2000-11-30 2012-05-22 Intrasonics S.A.R.L. Communication system

Also Published As

Publication number Publication date
FR2568432B1 (fr) 1990-06-29
FR2568432A1 (fr) 1986-01-31
CA1253920A (en) 1989-05-09
DE3582979D1 (de) 1991-07-04
EP0172095B1 (de) 1991-05-29
ATE64048T1 (de) 1991-06-15
JPS6199446A (ja) 1986-05-17

Similar Documents

Publication Publication Date Title
EP0172095B1 (de) Verfahren und Einrichtung zur Übertragung kodierter Informationen über einen Funkkanal durch Überlagerung auf eine herkömmliche FM-Übertragung
US5128933A (en) Process and device for the radio transmission of coded data superimposed on a traditional frequency-modulated broadcast
US4811357A (en) Secondary channel for digital modems using spread spectrum subliminal induced modulation
FR2684507A1 (fr) Modem semi-duplex pour reseau de radiotelephones gsm.
FR2496375A1 (fr) Appareil d'enregistrement/reproduction de signaux de television avec des signaux autio multiplexes
EP0702481A1 (de) Detektor für Trägerverlust in einem Faksimile-Modem
FR2494018A1 (fr) Dispositif pour enregistrer et restituer des signaux sur des supports d'enregistrement de haute densite
US3054857A (en) Secrecy system
US6025946A (en) Transmission device and transmission method
EP0424201B1 (de) Dekoder zum Dekodieren eines verschlüsselten Fernsehaudiosignals
EP0273815B1 (de) Verfahren und Einrichtung mit einstellbarem Schutzniveau für Modulation und Demodulation mit verschiedenen Zuständen
EP0491639A1 (de) Tragbare Karte zum Empfangen von Personen-Nachrichten
FR2508751A1 (fr) Recepteur-son d'un televiseur
EP0702468B1 (de) Einrichtung zur Erkennung einer Synchronisierungsfolge
US4538285A (en) FM-receiver for receiving FM-signals with transmission identification
FR2482804A1 (fr) Recepteur radioelectrique a modulation de frequence
US20100136921A1 (en) Interface unit for display of alphanumeric data
EP0731588A1 (de) Phasenmodulation mit mehrfacher Auflösung, für Mehrträgersysteme
Ishida et al. A spatial optical transmission system for audio-video signal
FR2616603A1 (fr) Procede de transmission de donnees par un canal radiophonique, emetteur et recepteur pour la mise en oeuvre de ce procede
FR2615056A1 (fr) Systeme de communication digital a recepteur miniaturise et microprocessorise
KR100641094B1 (ko) 디지탈 브이씨알과 위성방송 수신기간의 인터페이스장치
EP1555794B1 (de) Mobilfunkgerät vom Typ an zwei verschiedenen Modulen
Dunn Considerations for Interfacing Digital Audio Equipment to the Standards AES-3, AES-5, AES-11
JPH07250311A (ja) テレビ電話

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860721

17Q First examination report despatched

Effective date: 19881010

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 64048

Country of ref document: AT

Date of ref document: 19910615

Kind code of ref document: T

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19910702

Year of fee payment: 7

REF Corresponds to:

Ref document number: 3582979

Country of ref document: DE

Date of ref document: 19910704

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910708

Year of fee payment: 7

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19910717

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910723

Year of fee payment: 7

Ref country code: GB

Payment date: 19910723

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910731

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910809

Year of fee payment: 7

ITF It: translation for a ep patent filed

Owner name: DR. ING. A. RACHELI & C.

EPTA Lu: last paid annual fee
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19920729

Ref country code: GB

Effective date: 19920729

Ref country code: AT

Effective date: 19920729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920731

Ref country code: CH

Effective date: 19920731

Ref country code: BE

Effective date: 19920731

BERE Be: lapsed

Owner name: BARANOFF-ROSSINE DIMITRI

Effective date: 19920731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930216

Year of fee payment: 8

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920729

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940401

EUG Se: european patent has lapsed

Ref document number: 85401547.6

Effective date: 19930204