GB1347994A - Sound recording and reproduction - Google Patents

Sound recording and reproduction

Info

Publication number
GB1347994A
GB1347994A GB1948871*[A GB1948871A GB1347994A GB 1347994 A GB1347994 A GB 1347994A GB 1948871 A GB1948871 A GB 1948871A GB 1347994 A GB1347994 A GB 1347994A
Authority
GB
United Kingdom
Prior art keywords
signals
channels
signal
gain
channel
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
GB1948871*[A
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
Columbia Broadcasting System 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 System Inc filed Critical Columbia Broadcasting System Inc
Publication of GB1347994A publication Critical patent/GB1347994A/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)
GB1948871*[A 1970-06-08 1971-06-08 Sound recording and reproduction Expired GB1347994A (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
GB1347994A true GB1347994A (en) 1974-02-27

Family

ID=21931011

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1948871*[A Expired GB1347994A (en) 1970-06-08 1971-06-08 Sound recording and reproduction

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2514598A (en) * 2013-05-30 2014-12-03 Egils Ranga An optimised three speaker stereo sound system

Families Citing this family (28)

* 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 Industrial Co Ltd Circuit for mixing four audio input signals to produce four audio output signals
JPS5213082B1 (enExample) * 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 (enExample) * 1972-03-07 1977-10-13
JPS5228361B2 (enExample) * 1972-03-09 1977-07-26
JPS5317283B2 (enExample) * 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
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
US5666424A (en) * 1990-06-08 1997-09-09 Harman International Industries, Inc. Six-axis surround sound processor with automatic balancing and calibration
US5295189A (en) * 1990-06-08 1994-03-15 Fosgate James W Control voltage generator for surround sound processor
US5504819A (en) * 1990-06-08 1996-04-02 Harman International Industries, Inc. Surround sound processor with improved control voltage generator
US5339363A (en) * 1990-06-08 1994-08-16 Fosgate James W Apparatus for enhancing monophonic audio signals using phase shifters
US5172415A (en) * 1990-06-08 1992-12-15 Fosgate James W Surround processor
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
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2514598A (en) * 2013-05-30 2014-12-03 Egils Ranga An optimised three speaker stereo sound system
GB2514598B (en) * 2013-05-30 2015-04-29 Egils Ranga An optimised three speaker stereo sound system

Also Published As

Publication number Publication date
CA961417A (en) 1975-01-21
NL7106252A (enExample) 1971-12-10
JPS5017843B1 (enExample) 1975-06-24
BE768184A (fr) 1971-12-07
DE2126480B2 (de) 1976-09-30
DE2126480A1 (de) 1972-01-27
US3708631A (en) 1973-01-02
FR2094122B1 (enExample) 1976-12-03
FR2094122A1 (enExample) 1972-02-04

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Legal Events

Date Code Title Description
49S Specification amended (sect. 9/1949)
PS Patent sealed [section 19, patents act 1949]
49S Specification amended (sect. 9/1949)
PCNP Patent ceased through non-payment of renewal fee