GB1430195A - Four-channel stereophonic sound reproducing system - Google Patents

Four-channel stereophonic sound reproducing system

Info

Publication number
GB1430195A
GB1430195A GB1105073A GB1105073A GB1430195A GB 1430195 A GB1430195 A GB 1430195A GB 1105073 A GB1105073 A GB 1105073A GB 1105073 A GB1105073 A GB 1105073A GB 1430195 A GB1430195 A GB 1430195A
Authority
GB
United Kingdom
Prior art keywords
signals
phase
channels
components
amplitudes
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
GB1105073A
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB1430195A publication Critical patent/GB1430195A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
    • 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)
  • Multimedia (AREA)
  • Stereophonic System (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB1105073A 1972-03-07 1973-03-07 Four-channel stereophonic sound reproducing system Expired GB1430195A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47022747A JPS5240563B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-03-07 1972-03-07

Publications (1)

Publication Number Publication Date
GB1430195A true GB1430195A (en) 1976-03-31

Family

ID=12091275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1105073A Expired GB1430195A (en) 1972-03-07 1973-03-07 Four-channel stereophonic sound reproducing system

Country Status (3)

Country Link
US (1) US3864516A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5240563B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1430195A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154835A (en) * 1984-02-21 1985-09-11 Kintek Inc Signal decoding system
WO1989002195A1 (fr) * 1987-08-26 1989-03-09 Vsesojuzny Nauchno-Issledovatelsky Institut Radiov Dispositif pour coder et decoder des signaux de radiodiffusion sonore

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018992A (en) * 1975-09-25 1977-04-19 Clifford H. Moulton Decoder for quadraphonic playback
US4211978A (en) * 1977-04-25 1980-07-08 Victor Company Of Japan, Limited Cross-talk component cancellation circuit in an angle-modulated wave signal transmission system
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
US4680796A (en) * 1986-04-11 1987-07-14 Kintek, Inc. Sound encoding system
US5295189A (en) * 1990-06-08 1994-03-15 Fosgate James W Control voltage generator for surround sound processor
US5172415A (en) * 1990-06-08 1992-12-15 Fosgate James W Surround processor
US5504819A (en) * 1990-06-08 1996-04-02 Harman International Industries, Inc. Surround sound processor with improved control voltage generator
US5666424A (en) * 1990-06-08 1997-09-09 Harman International Industries, Inc. Six-axis surround sound processor with automatic balancing and calibration
US5339363A (en) * 1990-06-08 1994-08-16 Fosgate James W Apparatus for enhancing monophonic audio signals using phase shifters
US5642423A (en) * 1995-11-22 1997-06-24 Sony Corporation Digital surround sound processor
US7454257B2 (en) * 2001-02-08 2008-11-18 Warner Music Group Apparatus and method for down converting multichannel programs to dual channel programs using a smart coefficient generator
TWI420918B (zh) * 2005-12-02 2013-12-21 Dolby Lab Licensing Corp 低複雜度音訊矩陣解碼器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718773A (en) * 1970-05-18 1973-02-27 Barnard R Four channel recording and reproducing system
US3708631A (en) * 1970-06-08 1973-01-02 Columbia Broadcasting Syst Inc Quadraphonic reproducing system with gain control

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154835A (en) * 1984-02-21 1985-09-11 Kintek Inc Signal decoding system
AU577355B2 (en) * 1984-02-21 1988-09-22 Kintek Inc. Pseudo-stereo reproduction
AU602107B2 (en) * 1984-02-21 1990-09-27 Kintek Inc. Signal decoding system
WO1989002195A1 (fr) * 1987-08-26 1989-03-09 Vsesojuzny Nauchno-Issledovatelsky Institut Radiov Dispositif pour coder et decoder des signaux de radiodiffusion sonore
DE3791003T1 (de) * 1987-08-26 1989-10-19 Vnii Radiovesh Priema Akustiki Einrichtung zur kodierung und dekodierung von tonprogramm-signalen
GB2224185A (en) * 1987-08-26 1990-04-25 Vnii Radiovesh Priema Akustiki Device for coding and decoding sound broadcast signals
GB2224185B (en) * 1987-08-26 1991-05-08 Vnii Radiovesh Priema Akustiki Device for coding and decoding sound broadcast signals

Also Published As

Publication number Publication date
JPS4890705A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-11-27
US3864516A (en) 1975-02-04
JPS5240563B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-10-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee