GB1402474A - Sound reproduction systems - Google Patents

Sound reproduction systems

Info

Publication number
GB1402474A
GB1402474A GB5875772A GB5875772A GB1402474A GB 1402474 A GB1402474 A GB 1402474A GB 5875772 A GB5875772 A GB 5875772A GB 5875772 A GB5875772 A GB 5875772A GB 1402474 A GB1402474 A GB 1402474A
Authority
GB
United Kingdom
Prior art keywords
signals
matrix
converter
composite
reproduction
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
GB5875772A
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.)
Sansui Electric Co Ltd
Original Assignee
Sansui 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 Sansui Electric Co Ltd filed Critical Sansui Electric Co Ltd
Publication of GB1402474A publication Critical patent/GB1402474A/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 Analysis (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Stereophonic System (AREA)
  • Stereo-Broadcasting Methods (AREA)
GB5875772A 1971-12-21 1972-12-20 Sound reproduction systems Expired GB1402474A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10397071A JPS5313962B2 (ja) 1971-12-21 1971-12-21

Publications (1)

Publication Number Publication Date
GB1402474A true GB1402474A (en) 1975-08-06

Family

ID=14368190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5875772A Expired GB1402474A (en) 1971-12-21 1972-12-20 Sound reproduction systems

Country Status (5)

Country Link
US (1) US3885101A (ja)
JP (1) JPS5313962B2 (ja)
DE (1) DE2262761C3 (ja)
GB (1) GB1402474A (ja)
NL (1) NL163939C (ja)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1494751A (en) * 1974-03-26 1977-12-14 Nat Res Dev Sound reproduction systems
US3971890A (en) * 1975-02-10 1976-07-27 Cbs Inc. Method and apparatus for quadraphonic enhancement of stereophonic signals
GB1550627A (en) * 1975-11-13 1979-08-15 Nat Res Dev Sound reproduction systems
JPS56102625A (en) * 1980-01-19 1981-08-17 Matsushita Electric Ind Co Ltd Cooker
US5412731A (en) * 1982-11-08 1995-05-02 Desper Products, Inc. Automatic stereophonic manipulation system and apparatus for image enhancement
US4589129A (en) * 1984-02-21 1986-05-13 Kintek, Inc. Signal decoding system
US4612663A (en) * 1984-03-26 1986-09-16 Holbrook Kyle A Multichannel audio reproduction 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
US4819269A (en) * 1987-07-21 1989-04-04 Hughes Aircraft Company Extended imaging split mode loudspeaker system
US4910778A (en) * 1987-10-16 1990-03-20 Barton Geoffrey J Signal enhancement processor for stereo system
US5661808A (en) * 1995-04-27 1997-08-26 Srs Labs, Inc. Stereo enhancement system
US5850453A (en) 1995-07-28 1998-12-15 Srs Labs, Inc. Acoustic correction apparatus
US6118876A (en) * 1995-09-07 2000-09-12 Rep Investment Limited Liability Company Surround sound speaker system for improved spatial effects
US5708719A (en) * 1995-09-07 1998-01-13 Rep Investment Limited Liability Company In-home theater surround sound speaker system
US5930370A (en) * 1995-09-07 1999-07-27 Rep Investment Limited Liability In-home theater surround sound speaker system
US5970152A (en) * 1996-04-30 1999-10-19 Srs Labs, Inc. Audio enhancement system for use in a surround sound environment
US5912976A (en) * 1996-11-07 1999-06-15 Srs Labs, Inc. Multi-channel audio enhancement system for use in recording and playback and methods for providing same
US6281749B1 (en) 1997-06-17 2001-08-28 Srs Labs, Inc. Sound enhancement system
US7031474B1 (en) 1999-10-04 2006-04-18 Srs Labs, Inc. Acoustic correction apparatus
US7277767B2 (en) * 1999-12-10 2007-10-02 Srs Labs, Inc. System and method for enhanced streaming audio
JP2007208679A (ja) * 2006-02-02 2007-08-16 Matsushita Electric Ind Co Ltd 音響再生装置
US8050434B1 (en) 2006-12-21 2011-11-01 Srs Labs, Inc. Multi-channel audio enhancement system
WO2012094338A1 (en) 2011-01-04 2012-07-12 Srs Labs, Inc. Immersive audio rendering system
US9258664B2 (en) 2013-05-23 2016-02-09 Comhear, Inc. Headphone audio enhancement system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329772A (en) * 1963-10-28 1967-07-04 John H Farrell Binaural simulator
US3170991A (en) * 1963-11-27 1965-02-23 Glasgal Ralph System for stereo separation ratio control, elimination of cross-talk and the like
US3718773A (en) * 1970-05-18 1973-02-27 Barnard R Four channel recording and reproducing system
US3757047A (en) * 1970-05-21 1973-09-04 Sansui Electric Co Four channel sound reproduction system
US3684835A (en) * 1970-07-29 1972-08-15 Parasound Inc Four channel stereo synthesizer
CA942198A (en) * 1970-09-15 1974-02-19 Kazuho Ohta Multidimensional stereophonic reproducing system
NL172815B (nl) * 1971-04-13 Sony Corp Meervoudige geluidweergeefinrichting.
US3697692A (en) * 1971-06-10 1972-10-10 Dynaco Inc Two-channel,four-component stereophonic system
US3710023A (en) * 1971-09-27 1973-01-09 Int Technical Dev Corp Sound reproducing system for a four speaker stereo utilizing signal expansion and signal delay

Also Published As

Publication number Publication date
NL163939C (nl) 1980-10-15
DE2262761B2 (de) 1980-08-21
DE2262761C3 (de) 1981-04-09
NL7217342A (ja) 1973-06-25
JPS5313962B2 (ja) 1978-05-13
DE2262761A1 (de) 1973-07-05
JPS4869501A (ja) 1973-09-21
US3885101A (en) 1975-05-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee