GB2221595B - Improvements in or relating to sound reproduction systems - Google Patents

Improvements in or relating to sound reproduction systems

Info

Publication number
GB2221595B
GB2221595B GB8910847A GB8910847A GB2221595B GB 2221595 B GB2221595 B GB 2221595B GB 8910847 A GB8910847 A GB 8910847A GB 8910847 A GB8910847 A GB 8910847A GB 2221595 B GB2221595 B GB 2221595B
Authority
GB
United Kingdom
Prior art keywords
relating
sound reproduction
reproduction systems
systems
sound
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 - Lifetime
Application number
GB8910847A
Other versions
GB8910847D0 (en
GB2221595A (en
Inventor
Philip Arthur Nelson
Stephen John Elliott
Ian Mcgregor Stothers
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.)
University of Southampton
Original Assignee
University of Southampton
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 University of Southampton filed Critical University of Southampton
Publication of GB8910847D0 publication Critical patent/GB8910847D0/en
Priority to AU39814/89A priority Critical patent/AU3981489A/en
Priority to EP89908465A priority patent/EP0434691B1/en
Priority to DE68921890T priority patent/DE68921890T2/en
Priority to AT89908465T priority patent/ATE120328T1/en
Priority to PCT/GB1989/000773 priority patent/WO1990000851A1/en
Priority to JP50788089A priority patent/JP3264489B2/en
Publication of GB2221595A publication Critical patent/GB2221595A/en
Application granted granted Critical
Publication of GB2221595B publication Critical patent/GB2221595B/en
Priority to US07/655,409 priority patent/US5727066A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/165—Equalizers; Volume or gain control in limited frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
GB8910847A 1988-07-08 1989-05-11 Improvements in or relating to sound reproduction systems Expired - Lifetime GB2221595B (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP89908465A EP0434691B1 (en) 1988-07-08 1989-07-07 Improvements in or relating to sound reproduction systems
AU39814/89A AU3981489A (en) 1988-07-08 1989-07-07 Improvements in or relating to sound reproduction systems
DE68921890T DE68921890T2 (en) 1988-07-08 1989-07-07 SOUND PLAYING SYSTEMS.
AT89908465T ATE120328T1 (en) 1988-07-08 1989-07-07 SOUND REPRODUCTION SYSTEMS.
PCT/GB1989/000773 WO1990000851A1 (en) 1988-07-08 1989-07-07 Improvements in or relating to sound reproduction systems
JP50788089A JP3264489B2 (en) 1988-07-08 1989-07-07 Sound reproduction device
US07/655,409 US5727066A (en) 1988-07-08 1993-04-27 Sound Reproduction systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888816364A GB8816364D0 (en) 1988-07-08 1988-07-08 Improvements in/relating to sound reproduction systems

Publications (3)

Publication Number Publication Date
GB8910847D0 GB8910847D0 (en) 1989-06-28
GB2221595A GB2221595A (en) 1990-02-07
GB2221595B true GB2221595B (en) 1992-09-30

Family

ID=10640167

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888816364A Pending GB8816364D0 (en) 1988-07-08 1988-07-08 Improvements in/relating to sound reproduction systems
GB8910847A Expired - Lifetime GB2221595B (en) 1988-07-08 1989-05-11 Improvements in or relating to sound reproduction systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888816364A Pending GB8816364D0 (en) 1988-07-08 1988-07-08 Improvements in/relating to sound reproduction systems

Country Status (1)

Country Link
GB (2) GB8816364D0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0139176B1 (en) * 1992-06-30 1998-06-15 김광호 Multi-resolution linear distortion compensation method and apparatus
FI97576C (en) * 1995-03-17 1997-01-10 Farm Film Oy Listening System
AU2003255673A1 (en) * 2003-06-13 2005-01-28 France Telecom Binaural signal processing with improved efficiency
US20110311065A1 (en) 2006-03-14 2011-12-22 Harman International Industries, Incorporated Extraction of channels from multichannel signals utilizing stimulus
US8121312B2 (en) * 2006-03-14 2012-02-21 Harman International Industries, Incorporated Wide-band equalization system
CN101262253B (en) * 2007-03-06 2011-11-09 华为技术有限公司 Method for solving cross-interference issue in digital user line and cross-interference elimination device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192969A (en) * 1977-09-10 1980-03-11 Makoto Iwahara Stage-expanded stereophonic sound reproduction
EP0094762A2 (en) * 1982-05-13 1983-11-23 Teledyne Industries, Inc. Automatic time domain equalization of audio signals
EP0119791A1 (en) * 1983-03-08 1984-09-26 Victor Company Of Japan, Limited Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field
EP0119645A1 (en) * 1983-02-23 1984-09-26 Koninklijke Philips Electronics N.V. Automatic equalizing system with discrete Fourier transform (DFT) or fast Fourier transform (FFT)
EP0159546A1 (en) * 1984-03-24 1985-10-30 Sony Corporation Digital graphic equalizer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192969A (en) * 1977-09-10 1980-03-11 Makoto Iwahara Stage-expanded stereophonic sound reproduction
EP0094762A2 (en) * 1982-05-13 1983-11-23 Teledyne Industries, Inc. Automatic time domain equalization of audio signals
EP0119645A1 (en) * 1983-02-23 1984-09-26 Koninklijke Philips Electronics N.V. Automatic equalizing system with discrete Fourier transform (DFT) or fast Fourier transform (FFT)
EP0119791A1 (en) * 1983-03-08 1984-09-26 Victor Company Of Japan, Limited Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field
EP0159546A1 (en) * 1984-03-24 1985-10-30 Sony Corporation Digital graphic equalizer

Also Published As

Publication number Publication date
GB8910847D0 (en) 1989-06-28
GB2221595A (en) 1990-02-07
GB8816364D0 (en) 1988-08-10

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20090510