IT983642B - Sistema di decodificazione per un segnale modulato in frequenza a quattro canali - Google Patents

Sistema di decodificazione per un segnale modulato in frequenza a quattro canali

Info

Publication number
IT983642B
IT983642B IT22541/73A IT2254173A IT983642B IT 983642 B IT983642 B IT 983642B IT 22541/73 A IT22541/73 A IT 22541/73A IT 2254173 A IT2254173 A IT 2254173A IT 983642 B IT983642 B IT 983642B
Authority
IT
Italy
Prior art keywords
channel frequency
decoding system
signal modulated
modulated
decoding
Prior art date
Application number
IT22541/73A
Other languages
English (en)
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
Application granted granted Critical
Publication of IT983642B publication Critical patent/IT983642B/it

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)
IT22541/73A 1972-04-07 1973-04-03 Sistema di decodificazione per un segnale modulato in frequenza a quattro canali IT983642B (it)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
IT983642B true IT983642B (it) 1974-11-11

Family

ID=22913337

Family Applications (1)

Application Number Title Priority Date Filing Date
IT22541/73A IT983642B (it) 1972-04-07 1973-04-03 Sistema di decodificazione per un segnale modulato in frequenza a quattro canali

Country Status (9)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5343242B2 (it) * 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 (it) * 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 (en) * 1990-12-11 1992-06-12 William J. Simpson Clay liner for steep slopes

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 (en) * 1970-02-25 1977-11-29 Louis Dorren Compatible four channel fm system
US3708623A (en) * 1970-04-29 1973-01-02 Quadracast Syst Inc Compatible four channel fm system
JPS4838001A (it) * 1971-09-15 1973-06-05
CA984007A (en) * 1971-09-21 1976-02-17 Antal Csicsatka Four channel stereophonic system
JPS49115601A (it) * 1973-02-21 1974-11-05

Also Published As

Publication number Publication date
US3798377A (en) 1974-03-19
GB1417884A (en) 1975-12-17
FR2179032B1 (it) 1978-09-08
CA1014625A (en) 1977-07-26
NL178381B (nl) 1985-10-01
JPS561820B2 (it) 1981-01-16
NL7304448A (it) 1973-10-09
NL178381C (nl) 1986-03-03
BE797716A (fr) 1973-07-31
FR2179032A1 (it) 1973-11-16
JPS4948206A (it) 1974-05-10
DE2317338A1 (de) 1973-10-18

Similar Documents

Publication Publication Date Title
IT971582B (it) Sistema per comprimere dati numerici
IT991412B (it) Sistema di trasmissione
BR7307773D0 (pt) Aperfeicoamentos em sistema de gravacao
IT993086B (it) Sistema modulatore
IT983642B (it) Sistema di decodificazione per un segnale modulato in frequenza a quattro canali
IT993085B (it) Sistema modulatore
BR7307806D0 (pt) Sistema de reproducao de informacoes
NL168973C (nl) Omroepstelsel.
IT971436B (it) Sistema di trasmissione a v
IT994626B (it) Disposizione circuitale per un ricevitore di segnali modulati in frequenza
IT995164B (it) Procedimento per preparare poliuretani tramite un sistema catalitico
IT981171B (it) Sistema di segnalazione per ferrovie
IT977889B (it) Apparecchio ostetrico per zootecnia
BR7303575D0 (pt) Sistema de comunicacao de dados
IT998955B (it) Apparecchio modulatore per la for mazione di un sistema di telefonia multipla di frequenza
BR7300976D0 (pt) Sistema regulador antibloqueio
IT1001965B (it) Dispositivo per gasare liquidi
AU6219473A (en) Transportation system
IT978150B (it) Sistema per trasmettere infor mazioni
IT995625B (it) Sistema per il conteggio di messag gi
IT1049586B (it) Sistema per trasmettere informazioni
IT1019537B (it) Sistema di radiocollegamento
IT996991B (it) Sistema di trasmissione di segnali
IT981094B (it) Sistema di segnalazione
IT1001671B (it) Sistema di trasmissione