GB1396352A - Apparatus for reproducing quadraphonic sound - Google Patents

Apparatus for reproducing quadraphonic sound

Info

Publication number
GB1396352A
GB1396352A GB2958472A GB2958472A GB1396352A GB 1396352 A GB1396352 A GB 1396352A GB 2958472 A GB2958472 A GB 2958472A GB 2958472 A GB2958472 A GB 2958472A GB 1396352 A GB1396352 A GB 1396352A
Authority
GB
United Kingdom
Prior art keywords
signals
signal
output
adders
logic circuit
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
GB2958472A
Other languages
English (en)
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
Publication of GB1396352A publication Critical patent/GB1396352A/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)
  • 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)
GB2958472A 1971-06-23 1972-06-23 Apparatus for reproducing quadraphonic sound Expired GB1396352A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1396352A true GB1396352A (en) 1975-06-04

Family

ID=22557545

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2958472A Expired GB1396352A (en) 1971-06-23 1972-06-23 Apparatus for reproducing quadraphonic sound

Country Status (10)

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

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 (it) * 1972-12-01 1980-07-21
JPS5320343B2 (it) * 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 (it) * 1977-09-22 1979-04-13
JPS54137248U (it) * 1978-03-17 1979-09-22
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
US5796844A (en) * 1996-07-19 1998-08-18 Lexicon Multichannel active matrix sound reproduction with maximum lateral separation
US5870480A (en) * 1996-07-19 1999-02-09 Lexicon Multichannel active matrix encoder and decoder 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
NL7208607A (it) 1972-12-28
DE2230842B2 (it) 1980-02-21
CA973806A (en) 1975-09-02
AU4377572A (en) 1974-01-03
DE2230842C3 (de) 1980-10-16
IT958512B (it) 1973-10-30
JPS5110963B1 (it) 1976-04-08
DE2230842A1 (de) 1972-12-28
BE785279A (fr) 1972-10-16
AU464001B2 (en) 1975-08-14
FR2143325B1 (it) 1979-04-06
US3798373A (en) 1974-03-19
FR2143325A1 (it) 1973-02-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee