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GB9103207D0 - Stereophonic sound reproduction system - Google Patents

Stereophonic sound reproduction system

Info

Publication number
GB9103207D0
GB9103207D0 GB919103207A GB9103207A GB9103207D0 GB 9103207 D0 GB9103207 D0 GB 9103207D0 GB 919103207 A GB919103207 A GB 919103207A GB 9103207 A GB9103207 A GB 9103207A GB 9103207 D0 GB9103207 D0 GB 9103207D0
Authority
GB
United Kingdom
Prior art keywords
signals
matrix means
feed
matrix
channel signals
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.)
Pending
Application number
GB919103207A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB919103207A priority Critical patent/GB9103207D0/en
Publication of GB9103207D0 publication Critical patent/GB9103207D0/en
Priority to AT92904564T priority patent/ATE211600T1/en
Priority to DE69232327T priority patent/DE69232327T2/en
Priority to EP92904564A priority patent/EP0571455B1/en
Priority to JP4504183A priority patent/JPH06506092A/en
Priority to PCT/GB1992/000267 priority patent/WO1992015180A1/en
Priority to US08/589,994 priority patent/US5594800A/en
Pending 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/11—Application of ambisonics in stereophonic audio systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H04S5/005—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation  of the pseudo five- or more-channel type, e.g. virtual surround

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Toys (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

Matrix reproduction decoding means (2) derive from input signals (20) intended to feed a stereophonic plurality of loudspeakers output signals (40) intended to feed a second greater plurality of loudspeakers in a stereophonic arrangement (50) covering a sector (3) of directions, substantially so as to preserve total reproduced energy to within an overall gain and equalisation, and to preserve to within constants of proportionality the angular dispositions of reproduced acoustical velocity and sound intensity vectors at an ideal listening position (4). Preferably for two-channel signals (20) matrix means (2) is frequency-dependent giving increased angular width above 5 kHz, and may incorporate width control. Matrix means encoding loudspeaker feed signals (20) into transmission channel signals, and matrix means decoding transmission channel signals into loudspeaker feed signals (40) may be used giving overall matrix means (2) in accordance with the invention. Matrix means (2) may be used to provide improved directional matching of sounds and associated visual images.
GB919103207A 1991-02-15 1991-02-15 Stereophonic sound reproduction system Pending GB9103207D0 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB919103207A GB9103207D0 (en) 1991-02-15 1991-02-15 Stereophonic sound reproduction system
AT92904564T ATE211600T1 (en) 1991-02-15 1992-02-14 SOUND PLAYBACK SYSTEM
DE69232327T DE69232327T2 (en) 1991-02-15 1992-02-14 A sound reproduction
EP92904564A EP0571455B1 (en) 1991-02-15 1992-02-14 Sound reproduction system
JP4504183A JPH06506092A (en) 1991-02-15 1992-02-14 sound reproduction system
PCT/GB1992/000267 WO1992015180A1 (en) 1991-02-15 1992-02-14 Sound reproduction system
US08/589,994 US5594800A (en) 1991-02-15 1996-01-23 Sound reproduction system having a matrix converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919103207A GB9103207D0 (en) 1991-02-15 1991-02-15 Stereophonic sound reproduction system

Publications (1)

Publication Number Publication Date
GB9103207D0 true GB9103207D0 (en) 1991-04-03

Family

ID=10690065

Family Applications (1)

Application Number Title Priority Date Filing Date
GB919103207A Pending GB9103207D0 (en) 1991-02-15 1991-02-15 Stereophonic sound reproduction system

Country Status (6)

Country Link
EP (1) EP0571455B1 (en)
JP (1) JPH06506092A (en)
AT (1) ATE211600T1 (en)
DE (1) DE69232327T2 (en)
GB (1) GB9103207D0 (en)
WO (1) WO1992015180A1 (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5291557A (en) * 1992-10-13 1994-03-01 Dolby Laboratories Licensing Corporation Adaptive rematrixing of matrixed audio signals
DE4440014C2 (en) * 1994-11-09 2002-02-07 Deutsche Telekom Ag Method and device for multi-channel sound reproduction
US6198827B1 (en) 1995-12-26 2001-03-06 Rocktron Corporation 5-2-5 Matrix system
US5771295A (en) * 1995-12-26 1998-06-23 Rocktron Corporation 5-2-5 matrix system
US6697491B1 (en) 1996-07-19 2004-02-24 Harman International Industries, Incorporated 5-2-5 matrix encoder and decoder system
US6711266B1 (en) * 1997-02-07 2004-03-23 Bose Corporation Surround sound channel encoding and decoding
PL338988A1 (en) * 1997-09-05 2000-12-04 Lexicon Matrix-type 5-2-5 encoder and decoder system
US6072878A (en) 1997-09-24 2000-06-06 Sonic Solutions Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics
KR100416757B1 (en) * 1999-06-10 2004-01-31 삼성전자주식회사 Multi-channel audio reproduction apparatus and method for loud-speaker reproduction
JP4861593B2 (en) * 2000-04-19 2012-01-25 エスエヌケー テック インベストメント エル．エル．シー． Multi-channel surround sound mastering and playback method for preserving 3D spatial harmonics
AUPR253601A0 (en) * 2001-01-12 2001-02-08 Banko, Dinko Flange aligning tool
US7490044B2 (en) * 2004-06-08 2009-02-10 Bose Corporation Audio signal processing
KR100725818B1 (en) 2004-07-14 2007-06-11 삼성전자주식회사 Sound reproducing apparatus and sound reproducing method providing optimal virtual sound source
US7283634B2 (en) * 2004-08-31 2007-10-16 Dts, Inc. Method of mixing audio channels using correlated outputs
US8045719B2 (en) * 2006-03-13 2011-10-25 Dolby Laboratories Licensing Corporation Rendering center channel audio
US9015051B2 (en) 2007-03-21 2015-04-21 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Reconstruction of audio channels with direction parameters indicating direction of origin
US8290167B2 (en) 2007-03-21 2012-10-16 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Method and apparatus for conversion between multi-channel audio formats
US8908873B2 (en) 2007-03-21 2014-12-09 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Method and apparatus for conversion between multi-channel audio formats
US20100331048A1 (en) * 2009-06-25 2010-12-30 Qualcomm Incorporated M-s stereo reproduction at a device
EP2523472A1 (en) 2011-05-13 2012-11-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method and computer program for generating a stereo output signal for providing additional output channels
US9959875B2 (en) 2013-03-01 2018-05-01 Qualcomm Incorporated Specifying spherical harmonic and/or higher order ambisonics coefficients in bitstreams
EP2830335A3 (en) * 2013-07-22 2015-02-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus, method, and computer program for mapping first and second input channels to at least one output channel
DE102014100049A1 (en) 2014-01-05 2015-07-09 Kronoton Gmbh Method for audio playback in a multi-channel sound system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5757763B2 (en) * 1974-11-29 1982-12-06 Nippon Columbia
GB2073556B (en) * 1980-02-23 1984-02-22 Nat Res Dev Sound reproduction systems
US5043970A (en) * 1988-01-06 1991-08-27 Lucasarts Entertainment Company Sound system with source material and surround timbre response correction, specified front and surround loudspeaker directionality, and multi-loudspeaker surround

Also Published As

Publication number Publication date
EP0571455B1 (en) 2002-01-02
ATE211600T1 (en) 2002-01-15
JPH06506092A (en) 1994-07-07
DE69232327T2 (en) 2002-08-22
DE69232327D1 (en) 2002-02-07
EP0571455A1 (en) 1993-12-01
WO1992015180A1 (en) 1992-09-03

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