IT958512B - IMPROVEMENT IN EQUIPMENT FOR THE REPRODUCTION OF SOUNDS IN FOUR PHONES - Google Patents

IMPROVEMENT IN EQUIPMENT FOR THE REPRODUCTION OF SOUNDS IN FOUR PHONES

Info

Publication number
IT958512B
IT958512B IT51115/72A IT5111572A IT958512B IT 958512 B IT958512 B IT 958512B IT 51115/72 A IT51115/72 A IT 51115/72A IT 5111572 A IT5111572 A IT 5111572A IT 958512 B IT958512 B IT 958512B
Authority
IT
Italy
Prior art keywords
sounds
phones
reproduction
improvement
equipment
Prior art date
Application number
IT51115/72A
Other languages
Italian (it)
Original Assignee
Columbia Broadcasting Syst 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 Syst Inc filed Critical Columbia Broadcasting Syst Inc
Application granted granted Critical
Publication of IT958512B publication Critical patent/IT958512B/en

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)
IT51115/72A 1971-06-23 1972-06-23 IMPROVEMENT IN EQUIPMENT FOR THE REPRODUCTION OF SOUNDS IN FOUR PHONES IT958512B (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
IT958512B true IT958512B (en) 1973-10-30

Family

ID=22557545

Family Applications (1)

Application Number Title Priority Date Filing Date
IT51115/72A IT958512B (en) 1971-06-23 1972-06-23 IMPROVEMENT IN EQUIPMENT FOR THE REPRODUCTION OF SOUNDS IN FOUR PHONES

Country Status (10)

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

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 (en) 1972-10-24 1982-08-26 Sansui Electric Co., Ltd., Tokyo Decoder for a 4-2-4 matrix system
JPS5527517B2 (en) * 1972-12-01 1980-07-21
JPS5320343B2 (en) * 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 (en) * 1977-09-22 1979-04-13
JPS54137248U (en) * 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
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
DE2230842A1 (en) 1972-12-28
AU464001B2 (en) 1975-08-14
NL7208607A (en) 1972-12-28
DE2230842B2 (en) 1980-02-21
JPS5110963B1 (en) 1976-04-08
AU4377572A (en) 1974-01-03
CA973806A (en) 1975-09-02
BE785279A (en) 1972-10-16
US3798373A (en) 1974-03-19
GB1396352A (en) 1975-06-04
FR2143325A1 (en) 1973-02-02
DE2230842C3 (en) 1980-10-16
FR2143325B1 (en) 1979-04-06

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