IT948394B - IMPROVEMENT IN SYSTEMS FOR RECORDING AND FOUR-PHONE REPRODUCTION OF SOUNDS USING A TWO TRACK RECORDING MEDIA - Google Patents

IMPROVEMENT IN SYSTEMS FOR RECORDING AND FOUR-PHONE REPRODUCTION OF SOUNDS USING A TWO TRACK RECORDING MEDIA

Info

Publication number
IT948394B
IT948394B IT48082/72A IT4808272A IT948394B IT 948394 B IT948394 B IT 948394B IT 48082/72 A IT48082/72 A IT 48082/72A IT 4808272 A IT4808272 A IT 4808272A IT 948394 B IT948394 B IT 948394B
Authority
IT
Italy
Prior art keywords
recording
sounds
improvement
systems
recording media
Prior art date
Application number
IT48082/72A
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 IT948394B publication Critical patent/IT948394B/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00992—Circuits for stereophonic or quadraphonic recording or reproducing
    • 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

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • General Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Algebra (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)
IT48082/72A 1971-02-24 1972-02-01 IMPROVEMENT IN SYSTEMS FOR RECORDING AND FOUR-PHONE REPRODUCTION OF SOUNDS USING A TWO TRACK RECORDING MEDIA IT948394B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11827171A 1971-02-24 1971-02-24

Publications (1)

Publication Number Publication Date
IT948394B true IT948394B (en) 1973-05-30

Family

ID=22377557

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48082/72A IT948394B (en) 1971-02-24 1972-02-01 IMPROVEMENT IN SYSTEMS FOR RECORDING AND FOUR-PHONE REPRODUCTION OF SOUNDS USING A TWO TRACK RECORDING MEDIA

Country Status (11)

Country Link
US (1) US3784744A (en)
JP (1) JPS5240561B1 (en)
AU (1) AU460098B2 (en)
BE (1) BE777215A (en)
CA (1) CA981589A (en)
DE (1) DE2208099C3 (en)
FR (1) FR2126176B1 (en)
GB (2) GB1379771A (en)
IL (1) IL38130A (en)
IT (1) IT948394B (en)
NL (1) NL7115538A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911222A (en) * 1970-12-09 1975-10-07 Kenwood Corp Method and a device for producing a 4-channel stereophonic sound field
US3883692A (en) * 1972-06-16 1975-05-13 Sony Corp Decoder apparatus with logic circuit for use with a four channel stereo
JPS5645358B2 (en) * 1973-11-29 1981-10-26
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

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
GB1387873A (en) 1975-03-19
IL38130A0 (en) 1972-01-27
IL38130A (en) 1974-09-10
NL7115538A (en) 1972-08-28
FR2126176B1 (en) 1976-04-30
FR2126176A1 (en) 1972-10-06
AU460098B2 (en) 1975-04-17
GB1379771A (en) 1975-01-08
BE777215A (en) 1972-06-23
CA981589A (en) 1976-01-13
AU3710771A (en) 1973-06-28
DE2208099A1 (en) 1972-09-07
DE2208099C3 (en) 1979-03-01
US3784744A (en) 1974-01-08
DE2208099B2 (en) 1978-07-06
JPS5240561B1 (en) 1977-10-13

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