CA978860A - Apparatus for recording and reproducing quadruphonic sound - Google Patents

Apparatus for recording and reproducing quadruphonic sound

Info

Publication number
CA978860A
CA978860A CA133,379A CA133379A CA978860A CA 978860 A CA978860 A CA 978860A CA 133379 A CA133379 A CA 133379A CA 978860 A CA978860 A CA 978860A
Authority
CA
Canada
Prior art keywords
quadruphonic
reproducing
sound
recording
reproducing quadruphonic
Prior art date
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
CA133,379A
Other versions
CA133379S (en
Inventor
Benjamin B. Bauer
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
CBS 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 CBS Inc filed Critical CBS Inc
Application granted granted Critical
Publication of CA978860A publication Critical patent/CA978860A/en
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)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Algebra (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
CA133,379A 1971-03-15 1972-01-28 Apparatus for recording and reproducing quadruphonic sound Expired CA978860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00124135A US3821471A (en) 1971-03-15 1971-03-15 Apparatus for reproducing quadraphonic sound

Publications (1)

Publication Number Publication Date
CA978860A true CA978860A (en) 1975-12-02

Family

ID=22412987

Family Applications (1)

Application Number Title Priority Date Filing Date
CA133,379A Expired CA978860A (en) 1971-03-15 1972-01-28 Apparatus for recording and reproducing quadruphonic sound

Country Status (8)

Country Link
US (1) US3821471A (en)
JP (2) JPS5110962B2 (en)
BE (2) BE780710R (en)
CA (1) CA978860A (en)
DE (1) DE2209424C3 (en)
FR (2) FR2130306B2 (en)
GB (1) GB1387874A (en)
NL (1) NL7203169A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645358B2 (en) * 1973-11-29 1981-10-26
JPS5424841B2 (en) * 1974-02-26 1979-08-24
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
US4018992A (en) * 1975-09-25 1977-04-19 Clifford H. Moulton Decoder for quadraphonic playback
GB1550627A (en) * 1975-11-13 1979-08-15 Nat Res Dev Sound reproduction systems
JPS5827645B2 (en) * 1977-11-24 1983-06-10 株式会社日立製作所 stationary induction equipment
US4799260A (en) * 1985-03-07 1989-01-17 Dolby Laboratories Licensing Corporation Variable matrix decoder
US4941177A (en) * 1985-03-07 1990-07-10 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
US7251337B2 (en) * 2003-04-24 2007-07-31 Dolby Laboratories Licensing Corporation Volume control in movie theaters
EP1767201B8 (en) * 2004-06-28 2012-02-29 Ajinomoto Co., Inc. Nutrient composition and composition for prevention/mitigation of digestive tract depression
JP4835298B2 (en) * 2006-07-21 2011-12-14 ソニー株式会社 Audio signal processing apparatus, audio signal processing method and program
US11039263B2 (en) * 2019-05-29 2021-06-15 Mark Petrouske Wide effect sound producing method

Also Published As

Publication number Publication date
DE2209424C3 (en) 1978-09-28
JPS5136903A (en) 1976-03-29
BE780711R (en) 1972-09-15
FR2130306A2 (en) 1972-11-03
US3821471A (en) 1974-06-28
DE2209424B2 (en) 1978-01-26
GB1387874A (en) 1975-03-19
JPS5110962B2 (en) 1976-04-08
DE2209424A1 (en) 1972-09-28
NL7203169A (en) 1972-09-19
BE780710R (en) 1972-09-15
FR2130305B2 (en) 1979-04-27
JPS5316281B2 (en) 1978-05-31
FR2130306B2 (en) 1977-12-23
FR2130305A2 (en) 1972-11-03
JPS4849401A (en) 1973-07-12

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Legal Events

Date Code Title Description
MKEX Expiry

Effective date: 19921202