EP0091874A1 - Procédé et dispositif de transmission stéréophonique à partir d'une installation de reproduction du son, sans fil, à des enceintes acoustiques - Google Patents

Procédé et dispositif de transmission stéréophonique à partir d'une installation de reproduction du son, sans fil, à des enceintes acoustiques Download PDF

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Publication number
EP0091874A1
EP0091874A1 EP83400718A EP83400718A EP0091874A1 EP 0091874 A1 EP0091874 A1 EP 0091874A1 EP 83400718 A EP83400718 A EP 83400718A EP 83400718 A EP83400718 A EP 83400718A EP 0091874 A1 EP0091874 A1 EP 0091874A1
Authority
EP
European Patent Office
Prior art keywords
frequency
signal
enclosure
stereophonic
synthesizer
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Withdrawn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
EP83400718A
Other languages
German (de)
English (en)
French (fr)
Inventor
Denis Marinier
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
Publication of EP0091874A1 publication Critical patent/EP0091874A1/fr
Withdrawn legal-status Critical Current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
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers

Definitions

  • the invention relates to a method and a device for transmitting to musical speakers, musical or other sound signals, wirelessly, from a so-called "high-fidelity" sound reproduction installation by means of a stereophonic transmission in frequency modulation.
  • radio relays allowing the use of acoustic speakers provided with a receiver and a low frequency amplifier, which receive a transmission from a transmitter located remotely, said transmitter transmitting an amplified signal from various accessories such as a record player, a radio receiver or the like.
  • This installation does not allow retransmission of stereophony.
  • the installation should have two transmitters, one for each channel (left and right), which would cause interference to reception and poor reproduction of the signals thus transmitted.
  • the invention aims to overcome these drawbacks by providing an installation in which the loudspeakers are completely independent, that is to say not connected by wire to a common preamplifier, while allowing quality stereophonic hearing.
  • a method according to the invention in that the "left" and “right” signals from the low-frequency stereophonic preamplifier are coded in a multiplexer and then used to frequency-modulate a high-frequency signal from a synthesizer which is itself amplified and sent thus modulated to a transmitting antenna and in that the transmitted signal is received by the receiving antennas specific to each enclosure, preamplified, demodulated, then decoded in each enclosure, only one of the two original low frequency signals being amplified and addressed to the loudspeakers of one enclosure, while in the other enclosure it is the second signal which is amplified and addressed to the loudspeakers.
  • the demodulation in each enclosure is controlled by a synthesizer adjusted to the same frequency as that of the emission.
  • the synthesizers are provided for selectively delivering several frequencies.
  • the device comprises a transmission unit 1, receiving the two low frequency signals "left” and "right” coming from one of the stereophonic playback devices (record player, tape recorder, radio receiver or other) and two loudspeakers 2, only one of which has been shown, and which each comprise a reception and decoding stage, a low-frequency amplification stage and three speakers.
  • the stereophonic playback devices record player, tape recorder, radio receiver or other
  • the loudspeakers 2 only one of which has been shown, and which each comprise a reception and decoding stage, a low-frequency amplification stage and three speakers.
  • the transmitting unit 1 comprises a low frequency preamplifier 3 with two channels, "left” and “right”; which transmits the two signals to a multiplexer 4.
  • the multiplexer 4 delivers a coded signal to a frequency modulator 6 which also receives a high frequency signal from a frequency synthesizer 5.
  • the modulated high frequency signal is then transmitted to a high frequency amplifier 7, then to a transmitting antenna 8.
  • Each acoustic enclosure 2 includes in its housing a reception antenna 9, which receives the modulated high-frequency signal transmitted by the antenna 8.
  • the received signal is transmitted to a high-frequency preamplifier 10 and amplified and then transmitted to a frequency demodulator 12 controlled by a frequency synthesizer 11.
  • the signal from the demodulator 12 is sent to a stereophonic decoder 13 which then reproduces by its outputs D and G the low frequency signals from the sound players.
  • a switch 14 then makes it possible to connect one or the other of the two outputs D or G of the decoder 13 to a low frequency amplification stage constituted by an amplifier 15 with possibly a preamplifier 17, both of them with a single channel.
  • the amplified low frequency signal is then sent to the speakers 16 of the speaker 2 to restore the "right" or "left” signal from the sound player.
  • Hearing in stereophony will be obtained by adjusting, by means of switches 14, one of the speakers 2 on the left channel and the other on the right channel.
  • Each speaker can be powered by an integrated battery or by its own power supply unit.
  • synthesizers for the device according to the invention is determined by the fact that the synthesizers deliver an extremely precise frequency which makes it possible to avoid interference with neighboring emissions.
  • the synthesizers of the device according to the invention can be adjusted in steps over a wide range of frequencies.
  • the synthesizers can be adjusted in 10 KHz steps between 100 and 110 MHz.
  • the wide choice of carrier frequencies thus authorized makes it possible to choose a free frequency in the event of disturbance by other emissions on the frequency previously chosen, such as in particular the remote control emissions of reduced models.
  • This adjustment can be carried out by the user of the high-fidelity system, using a button placed on the transmitting unit 1 and on each of the 2 receiving speakers.
  • a second button also placed on each enclosure 2 makes it possible to actuate the switch 14 to choose the channel which each enclosure will have to restore.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Stereophonic System (AREA)
EP83400718A 1982-04-13 1983-04-11 Procédé et dispositif de transmission stéréophonique à partir d'une installation de reproduction du son, sans fil, à des enceintes acoustiques Withdrawn EP0091874A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8206329A FR2525052A1 (fr) 1982-04-13 1982-04-13 Procede et dispositif de transmission stereophonique a partir d'une installation de reproduction du son, sans fil, a des enceintes acoustiques
FR8206329 1982-04-13

Publications (1)

Publication Number Publication Date
EP0091874A1 true EP0091874A1 (fr) 1983-10-19

Family

ID=9272982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400718A Withdrawn EP0091874A1 (fr) 1982-04-13 1983-04-11 Procédé et dispositif de transmission stéréophonique à partir d'une installation de reproduction du son, sans fil, à des enceintes acoustiques

Country Status (3)

Country Link
EP (1) EP0091874A1 (es)
JP (1) JPS58187099A (es)
FR (1) FR2525052A1 (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554657A1 (fr) * 1983-11-03 1985-05-10 Burstin Gilbert Dispositif adaptateur pour liaison audiophonique sans fil
FR2619480A1 (fr) * 1987-08-14 1989-02-17 Marinier Denis Procede et dispositif de transmission de haute qualite, a partir d'une installation de reproduction du son, sans fil, a des projecteurs de son autonomes
EP0600043A1 (en) * 1991-08-21 1994-06-08 L.S. Research, Inc. System for short-range transmission of signals over the air using a high frequency carrier
WO1995033357A1 (de) * 1994-05-26 1995-12-07 Mb Quart Akustik Und Elektronik Gmbh Verfahren und vorrichtung zur wiedergabe von schallsignalen sowie steuergerät und schallwiedergabegerät

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1203582B (it) * 1986-07-18 1989-02-15 Italiana Per Lo Sviluppo Dell Riproduttore perfezionato di segnali stereofonici
JP2002064900A (ja) * 2000-08-18 2002-02-28 Sony Corp 多チャンネル音響信号再生装置
JP4368210B2 (ja) 2004-01-28 2009-11-18 ソニー株式会社 送受信システム、送信装置およびスピーカ搭載機器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1591095A1 (de) * 1967-04-03 1970-12-17 Wolfgang Dietz Drahtlose Ankopplung von Stereo-Kopfhoerern
US3590382A (en) * 1967-12-20 1971-06-29 Frank M Kenney Wireless stereo sound speaker system and modulator-oscillator circuit
FR2168999A1 (es) * 1972-01-24 1973-09-07 Ferrero Alexandre
DE2433893A1 (de) * 1974-07-15 1976-02-05 Werner Mertin Kabelfreies raumtongeraet
FR2453552A1 (fr) * 1979-04-04 1980-10-31 Marinier Denis Relais radiophonique amovible
FR2479616A1 (fr) * 1980-03-28 1981-10-02 Marinier Denis Appareil recepteur a modulation de frequence

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1591095A1 (de) * 1967-04-03 1970-12-17 Wolfgang Dietz Drahtlose Ankopplung von Stereo-Kopfhoerern
US3590382A (en) * 1967-12-20 1971-06-29 Frank M Kenney Wireless stereo sound speaker system and modulator-oscillator circuit
FR2168999A1 (es) * 1972-01-24 1973-09-07 Ferrero Alexandre
DE2433893A1 (de) * 1974-07-15 1976-02-05 Werner Mertin Kabelfreies raumtongeraet
FR2453552A1 (fr) * 1979-04-04 1980-10-31 Marinier Denis Relais radiophonique amovible
FR2479616A1 (fr) * 1980-03-28 1981-10-02 Marinier Denis Appareil recepteur a modulation de frequence

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554657A1 (fr) * 1983-11-03 1985-05-10 Burstin Gilbert Dispositif adaptateur pour liaison audiophonique sans fil
FR2619480A1 (fr) * 1987-08-14 1989-02-17 Marinier Denis Procede et dispositif de transmission de haute qualite, a partir d'une installation de reproduction du son, sans fil, a des projecteurs de son autonomes
EP0600043A1 (en) * 1991-08-21 1994-06-08 L.S. Research, Inc. System for short-range transmission of signals over the air using a high frequency carrier
EP0600043A4 (es) * 1991-08-21 1994-08-03 L.S. Research, Inc.
WO1995033357A1 (de) * 1994-05-26 1995-12-07 Mb Quart Akustik Und Elektronik Gmbh Verfahren und vorrichtung zur wiedergabe von schallsignalen sowie steuergerät und schallwiedergabegerät

Also Published As

Publication number Publication date
FR2525052A1 (fr) 1983-10-14
FR2525052B1 (es) 1984-07-06
JPS58187099A (ja) 1983-11-01

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Effective date: 19850811