BE797716A - Systeme decodeur pour un signal de modulation de frequence a quatre canaux - Google Patents

Systeme decodeur pour un signal de modulation de frequence a quatre canaux

Info

Publication number
BE797716A
BE797716A BE129596A BE129596A BE797716A BE 797716 A BE797716 A BE 797716A BE 129596 A BE129596 A BE 129596A BE 129596 A BE129596 A BE 129596A BE 797716 A BE797716 A BE 797716A
Authority
BE
Belgium
Prior art keywords
modulation signal
frequency modulation
channel frequency
decoder system
decoder
Prior art date
Application number
BE129596A
Other languages
English (en)
Inventor
Del Dorren
Original Assignee
Quadracast Systems
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 Quadracast Systems filed Critical Quadracast Systems
Publication of BE797716A publication Critical patent/BE797716A/fr

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)
  • Stereo-Broadcasting Methods (AREA)
BE129596A 1972-04-07 1973-04-03 Systeme decodeur pour un signal de modulation de frequence a quatre canaux BE797716A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24207372A 1972-04-07 1972-04-07

Publications (1)

Publication Number Publication Date
BE797716A true BE797716A (fr) 1973-07-31

Family

ID=22913337

Family Applications (1)

Application Number Title Priority Date Filing Date
BE129596A BE797716A (fr) 1972-04-07 1973-04-03 Systeme decodeur pour un signal de modulation de frequence a quatre canaux

Country Status (9)

Country Link
US (1) US3798377A (fr)
JP (1) JPS561820B2 (fr)
BE (1) BE797716A (fr)
CA (1) CA1014625A (fr)
DE (1) DE2317338A1 (fr)
FR (1) FR2179032B1 (fr)
GB (1) GB1417884A (fr)
IT (1) IT983642B (fr)
NL (1) NL178381C (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5343242B2 (fr) * 1973-03-19 1978-11-17
JPS5822892B2 (ja) * 1974-02-25 1983-05-12 ソニー株式会社 ４ チヤンネルステレオゴウセイシンゴウノ ハンベツカイロ
JPS5175105U (fr) * 1974-12-09 1976-06-12
JPS589615B2 (ja) * 1974-12-16 1983-02-22 ソニー株式会社 Ｆｍ ステレオフクチヨウホウシキ
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
US4061882A (en) * 1976-08-13 1977-12-06 Quadracast Systems, Inc. Quadrature multiplying four-channel demodulator
JPS61179338A (ja) * 1985-02-01 1986-08-12 旭化成株式会社 布製袋体
CA2054062A1 (fr) * 1990-12-11 1992-06-12 William J. Simpson Sous-couche d'argile pour pente raide

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283079A (en) * 1964-07-14 1966-11-01 Collins Radio Co Phase control network for a stereophonic system
US3584154A (en) * 1968-06-17 1971-06-08 Clarence Hunter Mcshan Stereo multiplex decoding system with a phase locked loop switching signal control
CA997000A (en) * 1969-12-29 1976-09-14 Allen L. Limberg Multiplex decoding system
CA1021852A (fr) * 1970-02-25 1977-11-29 Louis Dorren Systeme fm gradriphonique compatible
US3708623A (en) * 1970-04-29 1973-01-02 Quadracast Syst Inc Compatible four channel fm system
JPS4838001A (fr) * 1971-09-15 1973-06-05
CA984007A (en) * 1971-09-21 1976-02-17 Antal Csicsatka Four channel stereophonic system
BE811207A (fr) * 1973-02-21 1974-06-17 Decodeur pour signal de modulation de frequence a plusieurs canaux

Also Published As

Publication number Publication date
US3798377A (en) 1974-03-19
GB1417884A (en) 1975-12-17
FR2179032B1 (fr) 1978-09-08
JPS561820B2 (fr) 1981-01-16
FR2179032A1 (fr) 1973-11-16
DE2317338A1 (de) 1973-10-18
CA1014625A (en) 1977-07-26
NL178381C (nl) 1986-03-03
JPS4948206A (fr) 1974-05-10
IT983642B (it) 1974-11-11
NL178381B (nl) 1985-10-01
NL7304448A (fr) 1973-10-09

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: MATSUSHITA ELECTRIC CORP. OF AMERICA

Effective date: 19870430