FR2126176A1 - - Google Patents

Info

Publication number
FR2126176A1
FR2126176A1 FR7146313A FR7146313A FR2126176A1 FR 2126176 A1 FR2126176 A1 FR 2126176A1 FR 7146313 A FR7146313 A FR 7146313A FR 7146313 A FR7146313 A FR 7146313A FR 2126176 A1 FR2126176 A1 FR 2126176A1
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.)
Granted
Application number
FR7146313A
Other versions
FR2126176B1 (fr
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.)
COLUMBIA BROADCASTING
Original Assignee
COLUMBIA BROADCASTING
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 COLUMBIA BROADCASTING filed Critical COLUMBIA BROADCASTING
Publication of FR2126176A1 publication Critical patent/FR2126176A1/fr
Application granted granted Critical
Publication of FR2126176B1 publication Critical patent/FR2126176B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00992—Circuits for stereophonic or quadraphonic recording or reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • General Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Algebra (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)
FR7146313A 1971-02-24 1971-12-23 Expired FR2126176B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11827171A 1971-02-24 1971-02-24

Publications (2)

Publication Number Publication Date
FR2126176A1 true FR2126176A1 (fr) 1972-10-06
FR2126176B1 FR2126176B1 (fr) 1976-04-30

Family

ID=22377557

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7146313A Expired FR2126176B1 (fr) 1971-02-24 1971-12-23

Country Status (11)

Country Link
US (1) US3784744A (fr)
JP (1) JPS5240561B1 (fr)
AU (1) AU460098B2 (fr)
BE (1) BE777215A (fr)
CA (1) CA981589A (fr)
DE (1) DE2208099C3 (fr)
FR (1) FR2126176B1 (fr)
GB (2) GB1379771A (fr)
IL (1) IL38130A (fr)
IT (1) IT948394B (fr)
NL (1) NL7115538A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911222A (en) * 1970-12-09 1975-10-07 Kenwood Corp Method and a device for producing a 4-channel stereophonic sound field
US3883692A (en) * 1972-06-16 1975-05-13 Sony Corp Decoder apparatus with logic circuit for use with a four channel stereo
JPS5645358B2 (fr) * 1973-11-29 1981-10-26
US4799260A (en) * 1985-03-07 1989-01-17 Dolby Laboratories Licensing Corporation Variable matrix decoder
US5046098A (en) * 1985-03-07 1991-09-03 Dolby Laboratories Licensing Corporation Variable matrix decoder with three output channels

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632886A (en) * 1969-12-29 1972-01-04 Peter Scheiber Quadrasonic sound system
US3708631A (en) * 1970-06-08 1973-01-02 Columbia Broadcasting Syst Inc Quadraphonic reproducing system with gain control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
FR2126176B1 (fr) 1976-04-30
DE2208099C3 (de) 1979-03-01
CA981589A (en) 1976-01-13
GB1387873A (en) 1975-03-19
AU460098B2 (en) 1975-04-17
AU3710771A (en) 1973-06-28
DE2208099B2 (de) 1978-07-06
US3784744A (en) 1974-01-08
GB1379771A (en) 1975-01-08
BE777215A (fr) 1972-06-23
IT948394B (it) 1973-05-30
NL7115538A (fr) 1972-08-28
IL38130A (en) 1974-09-10
IL38130A0 (en) 1972-01-27
DE2208099A1 (de) 1972-09-07
JPS5240561B1 (fr) 1977-10-13

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Legal Events

Date Code Title Description
ST Notification of lapse