FR2310672A1 - Quadrphonic sound equipment using dual composite signals - has four loudspeakers receiving dual compositie signals to produce phantom sound sources - Google Patents

Quadrphonic sound equipment using dual composite signals - has four loudspeakers receiving dual compositie signals to produce phantom sound sources

Info

Publication number
FR2310672A1
FR2310672A1 FR7514400A FR7514400A FR2310672A1 FR 2310672 A1 FR2310672 A1 FR 2310672A1 FR 7514400 A FR7514400 A FR 7514400A FR 7514400 A FR7514400 A FR 7514400A FR 2310672 A1 FR2310672 A1 FR 2310672A1
Authority
FR
France
Prior art keywords
signals
dual
quadrphonic
compositie
loudspeakers
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Withdrawn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
FR7514400A
Other languages
French (fr)
Inventor
Gyula Dr Tofalvi
Laszlo Varga
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.)
EMV ELEKTROMECHANIKAI VALLALAT
Original Assignee
EMV ELEKTROMECHANIKAI VALLALAT
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 EMV ELEKTROMECHANIKAI VALLALAT filed Critical EMV ELEKTROMECHANIKAI VALLALAT
Priority to FR7514400A priority Critical patent/FR2310672A1/en
Publication of FR2310672A1 publication Critical patent/FR2310672A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

An equipment for quadraphonic transmission of sound uses three or four channels. The equipment has four microphones (1, 2, 3, 4) located at the corners of a diamond shape. The four separate signals from the microphones (1, 2, 3, 4) are supplied to quadrophonic encoder (5) which generates a multiplexed signal. The multiplexed signal is transmitted by an installation (6) and decoded by a decoder (7). The sounds are reproduced by four loudspeakers (8, 9, 10, 11) located at the corners of a square. These loudspeakers (8, 9, 10, 11) receive dual composite signals and form phantom sound sources (12, 13, 14, 15) at the corners of a diamond shape.
FR7514400A 1975-05-07 1975-05-07 Quadrphonic sound equipment using dual composite signals - has four loudspeakers receiving dual compositie signals to produce phantom sound sources Withdrawn FR2310672A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7514400A FR2310672A1 (en) 1975-05-07 1975-05-07 Quadrphonic sound equipment using dual composite signals - has four loudspeakers receiving dual compositie signals to produce phantom sound sources

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7514400A FR2310672A1 (en) 1975-05-07 1975-05-07 Quadrphonic sound equipment using dual composite signals - has four loudspeakers receiving dual compositie signals to produce phantom sound sources

Publications (1)

Publication Number Publication Date
FR2310672A1 true FR2310672A1 (en) 1976-12-03

Family

ID=9154998

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7514400A Withdrawn FR2310672A1 (en) 1975-05-07 1975-05-07 Quadrphonic sound equipment using dual composite signals - has four loudspeakers receiving dual compositie signals to produce phantom sound sources

Country Status (1)

Country Link
FR (1) FR2310672A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2159664A5 (en) * 1971-11-08 1973-06-22 Quadracast Systems
FR2163689A1 (en) * 1971-12-16 1973-07-27 Matsushita Electric Ind Co Ltd
FR2179032A1 (en) * 1972-04-07 1973-11-16 Quadracast Systems
FR2212717A1 (en) * 1972-12-28 1974-07-26 Elektromechanikai Vallalat

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2159664A5 (en) * 1971-11-08 1973-06-22 Quadracast Systems
FR2163689A1 (en) * 1971-12-16 1973-07-27 Matsushita Electric Ind Co Ltd
FR2179032A1 (en) * 1972-04-07 1973-11-16 Quadracast Systems
FR2212717A1 (en) * 1972-12-28 1974-07-26 Elektromechanikai Vallalat

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Revue US: 'IEEE Transactions on Broadcast and Television Receivers', Vol BTR-19, no. 4, novembre 1973, pages 277 - 285, article: 'An Optimum Quadraphonic FM Broadcasting System' de DORREN *
Revue US: 'Journal of the Audio Engineering Society', Vol 18, april 1970, no. 2, page 198, article: 'Time-Division Multiplex for Four-Channel FM' de COOPER *

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Legal Events

Date Code Title Description
ST Notification of lapse