FR2146394B1 - - Google Patents

Info

Publication number
FR2146394B1
FR2146394B1 FR7226055A FR7226055A FR2146394B1 FR 2146394 B1 FR2146394 B1 FR 2146394B1 FR 7226055 A FR7226055 A FR 7226055A FR 7226055 A FR7226055 A FR 7226055A FR 2146394 B1 FR2146394 B1 FR 2146394B1
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
FR7226055A
Other versions
FR2146394A1 (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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of FR2146394A1 publication Critical patent/FR2146394A1/fr
Application granted granted Critical
Publication of FR2146394B1 publication Critical patent/FR2146394B1/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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FR7226055A 1971-07-19 1972-07-19 Expired FR2146394B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46053771A JPS5213082B1 (fr) 1971-07-19 1971-07-19

Publications (2)

Publication Number Publication Date
FR2146394A1 FR2146394A1 (fr) 1973-03-02
FR2146394B1 true FR2146394B1 (fr) 1977-04-01

Family

ID=12952066

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7226055A Expired FR2146394B1 (fr) 1971-07-19 1972-07-19

Country Status (8)

Country Link
US (1) US3786193A (fr)
JP (1) JPS5213082B1 (fr)
CA (2) CA991086A (fr)
DE (1) DE2235238A1 (fr)
FR (1) FR2146394B1 (fr)
GB (1) GB1400061A (fr)
IT (1) IT963000B (fr)
NL (1) NL7209930A (fr)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985978A (en) * 1971-10-06 1976-10-12 Cooper Duane H Method and apparatus for control of FM beat distortion
GB1402320A (en) * 1971-10-25 1975-08-06 Sansui Electric Co Decoder for use in 4-2-4 matrix playback system
JPS5210364B2 (fr) * 1972-05-02 1977-03-23
DE2227705C3 (de) * 1972-06-07 1975-09-11 Polygram Gmbh, 2000 Hamburg Verfahren zur Herstellung einer vielkanaligen vorzugsweise vierkanaligen (quadraphonischen) Toninformation
US3883692A (en) * 1972-06-16 1975-05-13 Sony Corp Decoder apparatus with logic circuit for use with a four channel stereo
GB1447391A (en) * 1972-08-17 1976-08-25 Nagamura F Grooved record playback system
JPS5235282B2 (fr) * 1972-09-09 1977-09-08
DE2252132C3 (de) 1972-10-24 1982-08-26 Sansui Electric Co., Ltd., Tokyo Decodierer für ein 4-2-4-Matrixsystem
DE2253696B1 (de) * 1972-11-02 1974-02-21 Electroacustic Gmbh, 2300 Kiel Verfahren zur verringerung von stoerspannungen bei mehrkanaliger wiedergabe von akustischen darbietungen
GB1450533A (en) * 1972-11-08 1976-09-22 Ferrograph Co Ltd Stereo sound reproducing apparatus
US3890466A (en) * 1973-02-01 1975-06-17 Cbs Inc Encoders for quadraphonic sound system
JPS5317283B2 (fr) * 1973-03-07 1978-06-07
JPS5248001B2 (fr) * 1973-08-20 1977-12-07
US3919478A (en) * 1974-01-17 1975-11-11 Zenith Radio Corp Passive four-channel decoder
GB1514162A (en) * 1974-03-25 1978-06-14 Ruggles W Directional enhancement system for quadraphonic decoders
US3875338A (en) * 1974-04-18 1975-04-01 Columbia Broadcasting Syst Inc Decoder matrix for quadraphonic sound systems
US3943287A (en) * 1974-06-03 1976-03-09 Cbs Inc. Apparatus and method for decoding four channel sound
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
US4862502A (en) * 1988-01-06 1989-08-29 Lexicon, Inc. Sound reproduction
US5136650A (en) * 1991-01-09 1992-08-04 Lexicon, Inc. Sound reproduction
US5157697A (en) * 1991-03-21 1992-10-20 Novatel Communications, Ltd. Receiver employing correlation technique for canceling cross-talk between in-phase and quadrature channels prior to decoding
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
EP2190221B1 (fr) * 2008-11-20 2018-09-12 Harman Becker Automotive Systems GmbH Système audio

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

Also Published As

Publication number Publication date
DE2235238A1 (de) 1973-02-01
IT963000B (it) 1973-12-31
GB1400061A (en) 1975-07-16
US3786193A (en) 1974-01-15
CA991086A (en) 1976-06-15
FR2146394A1 (fr) 1973-03-02
JPS5213082B1 (fr) 1977-04-12
CA1001957A (en) 1976-12-21
NL7209930A (fr) 1973-01-23

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Legal Events

Date Code Title Description
ST Notification of lapse