CA961417A - Quadruphonic reproducing system - Google Patents

Quadruphonic reproducing system

Info

Publication number
CA961417A
CA961417A CA111,591A CA111591A CA961417A CA 961417 A CA961417 A CA 961417A CA 111591 A CA111591 A CA 111591A CA 961417 A CA961417 A CA 961417A
Authority
CA
Canada
Prior art keywords
quadruphonic
reproducing system
reproducing
quadruphonic reproducing
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
CA111,591A
Other versions
CA111591S (en
Inventor
Daniel W. Gravereaux
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 CA961417A publication Critical patent/CA961417A/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)
CA111,591A 1970-06-08 1971-04-28 Quadruphonic reproducing system Expired CA961417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4419670A 1970-06-08 1970-06-08

Publications (1)

Publication Number Publication Date
CA961417A true CA961417A (en) 1975-01-21

Family

ID=21931011

Family Applications (1)

Application Number Title Priority Date Filing Date
CA111,591A Expired CA961417A (en) 1970-06-08 1971-04-28 Quadruphonic reproducing system

Country Status (7)

Country Link
US (1) US3708631A (en)
JP (1) JPS5017843B1 (en)
BE (1) BE768184A (en)
CA (1) CA961417A (en)
FR (1) FR2094122B1 (en)
GB (1) GB1347994A (en)
NL (1) NL7106252A (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787622A (en) * 1971-02-05 1974-01-22 Sansui Electric Co Quadrasonic sound system for two channel transmission
US3784744A (en) * 1971-02-24 1974-01-08 Columbia Broadcasting Syst Inc Decoders for quadruphonic sound utilizing wave matching logic
US3967063A (en) * 1971-06-23 1976-06-29 Cbs Inc. Logic for matrix systems for reproducing quadraphonic sound
US3830978A (en) * 1971-07-08 1974-08-20 Matsushita Electric Ind Co Ltd Circuit for mixing four audio input signals to produce four audio output signals
JPS5213082B1 (en) * 1971-07-19 1977-04-12
GB1398786A (en) * 1971-08-06 1975-06-25 Sony Corp Multisignal transmission apparatus
US3794781A (en) * 1971-09-01 1974-02-26 Columbia Broadcasting Syst Inc Four channel decoder with improved gain control
US3824618A (en) * 1971-10-07 1974-07-16 Pioneer Electronic Corp Magnetic head and simulated four-channel stereo system
US3772479A (en) * 1971-10-19 1973-11-13 Motorola Inc Gain modified multi-channel audio system
US3783192A (en) * 1971-12-30 1974-01-01 Sansui Electric Co Decoder for use in matrix four-channel system
JPS5240563B2 (en) * 1972-03-07 1977-10-13
JPS5228361B2 (en) * 1972-03-09 1977-07-26
JPS5317283B2 (en) * 1973-03-07 1978-06-07
GB1522599A (en) * 1974-11-16 1978-08-23 Dolby Laboratories Inc Centre channel derivation for stereophonic cinema sound
US4018992A (en) * 1975-09-25 1977-04-19 Clifford H. Moulton Decoder for quadraphonic playback
US4006306A (en) * 1975-10-10 1977-02-01 Yudin Industries, Inc. Audio signal processing apparatus
US4474441A (en) * 1980-03-04 1984-10-02 Polaroid Corporation Method and apparatus for controlling exposure by selective use of blocking visible filter
US4532647A (en) * 1981-08-19 1985-07-30 John C. Bogue Automatic dimension control for a directional enhancement system
US4525855A (en) * 1981-08-27 1985-06-25 John C. Bogue Variable rate and variable limit dimension controls for a directional enhancement system
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
US5295189A (en) * 1990-06-08 1994-03-15 Fosgate James W Control voltage generator for surround sound processor
US5666424A (en) * 1990-06-08 1997-09-09 Harman International Industries, Inc. Six-axis surround sound processor with automatic balancing and calibration
US5504819A (en) * 1990-06-08 1996-04-02 Harman International Industries, Inc. Surround sound processor with improved control voltage generator
US5172415A (en) * 1990-06-08 1992-12-15 Fosgate James W Surround processor
US5339363A (en) * 1990-06-08 1994-08-16 Fosgate James W Apparatus for enhancing monophonic audio signals using phase shifters
US6925426B1 (en) 2000-02-22 2005-08-02 Board Of Trustees Operating Michigan State University Process for high fidelity sound recording and reproduction of musical sound
GB2514598B (en) * 2013-05-30 2015-04-29 Egils Ranga An optimised three speaker stereo sound system
US20170078793A1 (en) * 2015-03-23 2017-03-16 Eric Jay Alexander Inversion Speaker and Headphone for Music Production

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2098561A (en) * 1934-02-09 1937-11-09 Rca Corp System for producing stereosonic effects
US2126929A (en) * 1936-05-15 1938-08-16 Bell Telephone Labor Inc Sound reproducing system
US3184550A (en) * 1961-06-06 1965-05-18 Admiral Corp Stereophonic system with derived center channel
US3632886A (en) * 1969-12-29 1972-01-04 Peter Scheiber Quadrasonic sound system

Also Published As

Publication number Publication date
US3708631A (en) 1973-01-02
FR2094122B1 (en) 1976-12-03
BE768184A (en) 1971-12-07
NL7106252A (en) 1971-12-10
DE2126480B2 (en) 1976-09-30
DE2126480A1 (en) 1972-01-27
GB1347994A (en) 1974-02-27
JPS5017843B1 (en) 1975-06-24
FR2094122A1 (en) 1972-02-04

Similar Documents

Publication Publication Date Title
CA961417A (en) Quadruphonic reproducing system
CA949279A (en) Structural system
CA940476A (en) Moving system
CA945241A (en) Transducing positioning system
CA948937A (en) Storage system
CA931529A (en) Storage system
CA1021057A (en) Recorder-reproducer system
CA965273A (en) Recorder
CA948558A (en) Sound system
CA948272A (en) Electrographic recording system
CA953551A (en) Audio-visual system
CA972796A (en) Sound reproduction system
CA947813A (en) Electrographic recording system
AU457639B2 (en) Quadruphonic reproducing system
CA974457A (en) Quadruphonic reproducing system
CA857517A (en) Terrain-following system
CA833166A (en) Recording system
CA844156A (en) Amplifier system
CA855374A (en) Bathythermograph system
CA854971A (en) Photointerpretation system
CA852232A (en) Mark-making system
CA852230A (en) Marking-record system
CA821024A (en) Recording system
CA804677A (en) Recording system
CA833366A (en) Storage system