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 PDFInfo
- 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- Withdrawn
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Images
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.
Landscapes
- 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)
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)
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)
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)
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 |
-
1982
- 1982-04-13 FR FR8206329A patent/FR2525052A1/fr active Granted
-
1983
- 1983-04-11 EP EP83400718A patent/EP0091874A1/fr not_active Withdrawn
- 1983-04-13 JP JP58063816A patent/JPS58187099A/ja active Pending
Patent Citations (6)
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)
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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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 FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19840417 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19850811 |