FR2159664A5 - - Google Patents

Info

Publication number
FR2159664A5
FR2159664A5 FR7139957A FR7139957A FR2159664A5 FR 2159664 A5 FR2159664 A5 FR 2159664A5 FR 7139957 A FR7139957 A FR 7139957A FR 7139957 A FR7139957 A FR 7139957A FR 2159664 A5 FR2159664 A5 FR 2159664A5
Authority
FR
France
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.)
Expired
Application number
FR7139957A
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.)
Quadracast Systems Inc
Original Assignee
Quadracast Systems Inc
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
Priority to BE795901D priority Critical patent/BE795901Q/fr
Application filed by Quadracast Systems Inc filed Critical Quadracast Systems Inc
Priority to FR7139957A priority patent/FR2159664A5/fr
Application granted granted Critical
Publication of FR2159664A5 publication Critical patent/FR2159664A5/fr
Expired legal-status Critical Current

Links

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
    • H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
FR7139957A 1971-11-08 1971-11-08 Expired FR2159664A5 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE795901D BE795901Q (fr) 1971-11-08 Systeme a modulation de frequence compatible a quatre canaux
FR7139957A FR2159664A5 (fr) 1971-11-08 1971-11-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7139957A FR2159664A5 (fr) 1971-11-08 1971-11-08

Publications (1)

Publication Number Publication Date
FR2159664A5 true FR2159664A5 (fr) 1973-06-22

Family

ID=9085470

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7139957A Expired FR2159664A5 (fr) 1971-11-08 1971-11-08

Country Status (2)

Country Link
BE (1) BE795901Q (fr)
FR (1) FR2159664A5 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310672A1 (fr) * 1975-05-07 1976-12-03 Emv Elektromechanikai Vallalat Dispositif pour la realisation d'une transmission tetraphonique compatible au moyen de sources sonores virtuelles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109557A1 (de) * 1970-02-25 1971-09-09 Quadracast Systems Vierkanal FM Stereosystem

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109557A1 (de) * 1970-02-25 1971-09-09 Quadracast Systems Vierkanal FM Stereosystem

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310672A1 (fr) * 1975-05-07 1976-12-03 Emv Elektromechanikai Vallalat Dispositif pour la realisation d'une transmission tetraphonique compatible au moyen de sources sonores virtuelles

Also Published As

Publication number Publication date
BE795901Q (fr) 1973-06-18

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Legal Events

Date Code Title Description
TP Transmission of property
TP Transmission of property
ST Notification of lapse