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FR2143325B1 - - Google Patents

Info

Publication number
FR2143325B1
FR2143325B1 FR7222631A FR7222631A FR2143325B1 FR 2143325 B1 FR2143325 B1 FR 2143325B1 FR 7222631 A FR7222631 A FR 7222631A FR 7222631 A FR7222631 A FR 7222631A FR 2143325 B1 FR2143325 B1 FR 2143325B1
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
FR7222631A
Other versions
FR2143325A1 (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.)
CBS Broadcasting Inc
Original Assignee
Columbia Broadcasting System 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
Application filed by Columbia Broadcasting System Inc filed Critical Columbia Broadcasting System Inc
Publication of FR2143325A1 publication Critical patent/FR2143325A1/fr
Application granted granted Critical
Publication of FR2143325B1 publication Critical patent/FR2143325B1/fr
Expired 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
    • 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

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Stereo-Broadcasting Methods (AREA)
FR7222631A 1971-06-23 1972-06-22 Expired FR2143325B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15597671A 1971-06-23 1971-06-23

Publications (2)

Publication Number Publication Date
FR2143325A1 FR2143325A1 (fr) 1973-02-02
FR2143325B1 true FR2143325B1 (fr) 1979-04-06

Family

ID=22557545

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7222631A Expired FR2143325B1 (fr) 1971-06-23 1972-06-22

Country Status (10)

Country Link
US (1) US3798373A (fr)
JP (1) JPS5110963B1 (fr)
AU (1) AU464001B2 (fr)
BE (1) BE785279A (fr)
CA (1) CA973806A (fr)
DE (1) DE2230842C3 (fr)
FR (1) FR2143325B1 (fr)
GB (1) GB1396352A (fr)
IT (1) IT958512B (fr)
NL (1) NL7208607A (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1398786A (en) * 1971-08-06 1975-06-25 Sony Corp Multisignal transmission apparatus
DE2252132C3 (de) 1972-10-24 1982-08-26 Sansui Electric Co., Ltd., Tokyo Decodierer für ein 4-2-4-Matrixsystem
JPS5527517B2 (fr) * 1972-12-01 1980-07-21
JPS5320343B2 (fr) * 1973-03-29 1978-06-26
GB1514162A (en) * 1974-03-25 1978-06-14 Ruggles W Directional enhancement system for quadraphonic decoders
US3937885A (en) * 1974-09-06 1976-02-10 Motorola, Inc. Control circuit for a matrixed four channel audio reproducing system
JPS5453831U (fr) * 1977-09-22 1979-04-13
JPS54137248U (fr) * 1978-03-17 1979-09-22
US5046098A (en) * 1985-03-07 1991-09-03 Dolby Laboratories Licensing Corporation Variable matrix decoder with three output channels
US4799260A (en) * 1985-03-07 1989-01-17 Dolby Laboratories Licensing Corporation Variable matrix decoder
US4862502A (en) * 1988-01-06 1989-08-29 Lexicon, Inc. Sound reproduction
US5136650A (en) * 1991-01-09 1992-08-04 Lexicon, Inc. Sound reproduction
US5870480A (en) * 1996-07-19 1999-02-09 Lexicon Multichannel active matrix encoder and decoder with maximum lateral separation
US5796844A (en) * 1996-07-19 1998-08-18 Lexicon Multichannel active matrix sound reproduction with maximum lateral separation

Family Cites Families (3)

* 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
US3646574A (en) * 1970-05-25 1972-02-29 Howard S Holzer Compatible stereo generator
US3684835A (en) * 1970-07-29 1972-08-15 Parasound Inc Four channel stereo synthesizer

Also Published As

Publication number Publication date
AU4377572A (en) 1974-01-03
JPS5110963B1 (fr) 1976-04-08
AU464001B2 (en) 1975-08-14
BE785279A (fr) 1972-10-16
FR2143325A1 (fr) 1973-02-02
IT958512B (it) 1973-10-30
DE2230842A1 (de) 1972-12-28
DE2230842C3 (de) 1980-10-16
NL7208607A (fr) 1972-12-28
US3798373A (en) 1974-03-19
DE2230842B2 (fr) 1980-02-21
CA973806A (en) 1975-09-02
GB1396352A (en) 1975-06-04

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Legal Events

Date Code Title Description
ST Notification of lapse