DE3471226D1 - Automatic equalizing system with discrete fourier transform (dft) or fast fourier transform (fft) - Google Patents

Automatic equalizing system with discrete fourier transform (dft) or fast fourier transform (fft)

Info

Publication number
DE3471226D1
DE3471226D1 DE8484200221T DE3471226T DE3471226D1 DE 3471226 D1 DE3471226 D1 DE 3471226D1 DE 8484200221 T DE8484200221 T DE 8484200221T DE 3471226 T DE3471226 T DE 3471226T DE 3471226 D1 DE3471226 D1 DE 3471226D1
Authority
DE
Germany
Prior art keywords
fourier transform
dft
fft
equalizing system
automatic equalizing
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
DE8484200221T
Other languages
English (en)
Inventor
De Beek Franciscus J Op
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE3471226D1 publication Critical patent/DE3471226D1/de
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/18—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Stereophonic System (AREA)
DE8484200221T 1983-02-23 1984-02-20 Automatic equalizing system with discrete fourier transform (dft) or fast fourier transform (fft) Expired DE3471226D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8300671A NL8300671A (nl) 1983-02-23 1983-02-23 Automatisch egalisatiesysteem met dtf of fft.

Publications (1)

Publication Number Publication Date
DE3471226D1 true DE3471226D1 (en) 1988-06-16

Family

ID=19841459

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484200221T Expired DE3471226D1 (en) 1983-02-23 1984-02-20 Automatic equalizing system with discrete fourier transform (dft) or fast fourier transform (fft)

Country Status (10)

Country Link
US (1) US4628530A (de)
EP (1) EP0119645B1 (de)
JP (1) JPH0787633B2 (de)
KR (1) KR910002199B1 (de)
AU (1) AU565544B2 (de)
CA (1) CA1210095A (de)
DE (1) DE3471226D1 (de)
DK (1) DK157645B (de)
NL (1) NL8300671A (de)
SG (1) SG50290G (de)

Families Citing this family (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE77879T1 (de) * 1985-04-17 1992-07-15 Geoquip Security Systems Ltd Vibrationsempfindlicher transduktor.
NL8501834A (nl) * 1985-06-26 1987-01-16 Philips Nv Egalisatie-inrichting met verschuifbare bandfilters en een digitaal filter eventueel te gebruiken in de egalisatie-inrichting.
DE3630692A1 (de) * 1985-09-10 1987-04-30 Canon Kk Tonsignaluebertragungssystem
JPH0720310B2 (ja) * 1985-10-23 1995-03-06 松下電器産業株式会社 音質調整装置
JPH0685599B2 (ja) * 1986-04-09 1994-10-26 松下電器産業株式会社 音場補正装置
US4852176A (en) * 1986-05-12 1989-07-25 Truhe Jr Joseph V Continuous differential signal equalizer
JPH071960B2 (ja) * 1986-07-04 1995-01-11 松下電器産業株式会社 音場補正装置およびその音場補正方法
US4823391A (en) * 1986-07-22 1989-04-18 Schwartz David M Sound reproduction system
NL8702200A (nl) * 1987-09-16 1989-04-17 Philips Nv Werkwijze en een inrichting voor het instellen van de overdrachtskarakteristiek naar twee luisterposities in een ruimte
DE3741253A1 (de) * 1987-12-05 1989-06-15 Blaupunkt Werke Gmbh Verfahren und schaltungsanordnung zur selbsttaetigen stoergeraeuschabhaengigen lautstaerkeregelung
GB8816364D0 (en) * 1988-07-08 1988-08-10 Univ Southampton Improvements in/relating to sound reproduction systems
DE68921890T2 (de) * 1988-07-08 1995-07-20 Adaptive Audio Ltd Tonwiedergabesysteme.
US5046101A (en) * 1989-11-14 1991-09-03 Lovejoy Controls Corp. Audio dosage control system
US5272656A (en) * 1990-09-21 1993-12-21 Cambridge Signal Technologies, Inc. System and method of producing adaptive FIR digital filter with non-linear frequency resolution
WO1992005501A1 (en) * 1990-09-21 1992-04-02 Cambridge Signal Technologies, Inc. System and method of producing adaptive fir digital filter with non-linear frequency resolution
US5228093A (en) * 1991-10-24 1993-07-13 Agnello Anthony M Method for mixing source audio signals and an audio signal mixing system
US5506910A (en) * 1994-01-13 1996-04-09 Sabine Musical Manufacturing Company, Inc. Automatic equalizer
DE19580412C1 (de) * 1994-04-30 1998-10-22 Deutsch Zentr Luft & Raumfahrt Verfahren und Vorrichtung zur Kompensation akustischer Verfälschungen infolge der Raumakustik bei der Tonwiedergabe durch elektro-akustische Wiedergabegeräte
GB2292854B (en) * 1994-08-12 1999-08-25 Motorola Ltd Electronic audio device and method of operation
DE4432532A1 (de) * 1994-09-13 1996-03-14 Stn Atlas Elektronik Gmbh Verfahren zur Befreiung von Körperschallstörungen
JPH0890987A (ja) * 1994-09-26 1996-04-09 Yoshiro Yanagisawa 回転黒板
JPH10501951A (ja) * 1995-04-03 1998-02-17 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ 自動イコライザを有する信号増幅システム
JPH10271595A (ja) * 1997-03-21 1998-10-09 Nec Corp 帰還があるスピーカ装置
US6115476A (en) * 1998-06-30 2000-09-05 Intel Corporation Active digital audio/video signal modification to correct for playback system deficiencies
US6111957A (en) * 1998-07-02 2000-08-29 Acoustic Technologies, Inc. Apparatus and method for adjusting audio equipment in acoustic environments
GB0023207D0 (en) * 2000-09-21 2000-11-01 Royal College Of Art Apparatus for acoustically improving an environment
US7158643B2 (en) * 2000-04-21 2007-01-02 Keyhold Engineering, Inc. Auto-calibrating surround system
US7110558B1 (en) * 2000-10-30 2006-09-19 Verizon Corporate Services Group Inc. Systems and methods for automatically adjusting the volume of an audio source
GB0100444D0 (en) * 2001-01-09 2001-02-21 Roke Manor Research Improvements in or relating to hi-fi audio systems
DE10105184A1 (de) * 2001-02-06 2002-08-29 Bosch Gmbh Robert Verfahren zum automatischen Einstellen eines digitalen Equalizers und Wiedergabeeinrichtung für Audiosignale zur Realisierung eines solchen Verfahrens
US6937648B2 (en) * 2001-04-03 2005-08-30 Yitran Communications Ltd Equalizer for communication over noisy channels
WO2002090902A2 (en) * 2001-05-09 2002-11-14 Tc Electronic A/S Method of interacting with the acoustical modal structure of a room
US20020196951A1 (en) * 2001-06-26 2002-12-26 Kuo-Liang Tsai System for automatically performing a frequency response equalization tuning on speaker of electronic device
US7483540B2 (en) * 2002-03-25 2009-01-27 Bose Corporation Automatic audio system equalizing
US8676361B2 (en) * 2002-06-05 2014-03-18 Synopsys, Inc. Acoustical virtual reality engine and advanced techniques for enhancing delivered sound
US8668045B2 (en) * 2003-03-10 2014-03-11 Daniel E. Cohen Sound and vibration transmission pad and system
NZ542420A (en) * 2003-03-10 2008-03-28 Daniel E Cohen Sound and vibration transmission pad and system
US7553288B2 (en) * 2003-03-10 2009-06-30 Cohen Daniel E Sound and vibration transmission pad and system
US7194096B2 (en) * 2003-06-25 2007-03-20 Intel Corporation Method and apparatus for adaptively pre-shaping audio signal to accommodate loudspeaker characteristics
US7333618B2 (en) * 2003-09-24 2008-02-19 Harman International Industries, Incorporated Ambient noise sound level compensation
EP1680942A1 (de) * 2003-10-24 2006-07-19 Koninklijke Philips Electronics N.V. Adaptive schallwiedergabe
JP4568536B2 (ja) * 2004-03-17 2010-10-27 ソニー株式会社 測定装置、測定方法、プログラム
EP1591995B1 (de) * 2004-04-29 2019-06-19 Harman Becker Automotive Systems GmbH Innenraum-Nachrichtübertragungssystem für eine Fahrzeugkabine
LV13342B (en) * 2005-05-18 2005-10-20 Real Sound Lab Sia Method and device for correction of acoustic parameters of electro-acoustic transducers
DE102005028742B3 (de) * 2005-06-21 2006-09-21 Siemens Audiologische Technik Gmbh Hörhilfegerät mit Mitteln zur Rückkopplungskompensation und Verfahren zur Rückkopplungsunterdrückung
JP4770440B2 (ja) 2005-12-13 2011-09-14 ソニー株式会社 信号処理装置、信号処理方法
US8150069B2 (en) * 2006-03-31 2012-04-03 Sony Corporation Signal processing apparatus, signal processing method, and sound field correction system
JP4285531B2 (ja) 2006-11-29 2009-06-24 ソニー株式会社 信号処理装置、信号処理方法、プログラム
JP4466658B2 (ja) 2007-02-05 2010-05-26 ソニー株式会社 信号処理装置、信号処理方法、プログラム
DE102007031677B4 (de) * 2007-07-06 2010-05-20 Sda Software Design Ahnert Gmbh Verfahren und Vorrichtung zum Ermitteln einer raumakustischen Impulsantwort in der Zeitdomäne
DE102008053721A1 (de) * 2008-10-29 2010-05-12 Trident Microsystems (Far East) Ltd. Verfahren und Anordnung zur Optimierung des Übertragungsverhaltens von Lautsprechersystemen in einem Gerät der Unterhaltungselektronik
JP2010259008A (ja) * 2009-04-28 2010-11-11 Toshiba Corp 信号処理装置、音響装置及び信号処理方法
EP2441274B1 (de) * 2009-06-11 2017-08-09 SDA Software Design Ahnert GmbH Verfahren zum bestimmen einer gemittelten frequenzabhängigen übertragungsfunktion für ein gestörtes lineares zeitinvariantes system, auswertevorrichtung sowie computerprogrammprodukt
FR2955442B1 (fr) * 2010-01-21 2016-02-26 Canon Kk Procede de determination de filtrage, dispositif et programme d'ordinateur associes
EP2537255B8 (de) * 2010-03-31 2014-08-20 Innovationszentrum für Telekommunikationstechnik GmbH IZT Vorrichtung und verfahren zur umwandlung eines analog-zeitbereichssignals in ein digitalfrequenzbereichssignal sowie vorrichtung und verfahren zur umwandlung eines analogzeitbereichssignals in ein digitalzeitbereichssignal
JP2012186676A (ja) * 2011-03-07 2012-09-27 Sony Corp 信号処理装置および信号処理方法
US9060237B2 (en) * 2011-06-29 2015-06-16 Harman International Industries, Incorporated Musical measurement stimuli
JP2013102411A (ja) * 2011-10-14 2013-05-23 Sony Corp 音声信号処理装置、および音声信号処理方法、並びにプログラム
GB201121077D0 (en) * 2011-12-08 2012-01-18 Sontia Logic Ltd Reducing resonance
US9084058B2 (en) 2011-12-29 2015-07-14 Sonos, Inc. Sound field calibration using listener localization
US9219460B2 (en) 2014-03-17 2015-12-22 Sonos, Inc. Audio settings based on environment
US9106192B2 (en) 2012-06-28 2015-08-11 Sonos, Inc. System and method for device playback calibration
US9706323B2 (en) 2014-09-09 2017-07-11 Sonos, Inc. Playback device calibration
US20140095161A1 (en) * 2012-09-28 2014-04-03 At&T Intellectual Property I, L.P. System and method for channel equalization using characteristics of an unknown signal
WO2014100012A1 (en) * 2012-12-20 2014-06-26 The Regents Of The University Of California Electrostatic graphene speaker
US9357302B2 (en) * 2014-02-18 2016-05-31 Maxim Integrated Products, Inc. System and method for extracting parameters of a speaker without using stimulus
US9264839B2 (en) 2014-03-17 2016-02-16 Sonos, Inc. Playback device configuration based on proximity detection
US10027299B2 (en) * 2014-08-25 2018-07-17 Lenovo (Singapore) Pte. Ltd. Volume control
US9952825B2 (en) 2014-09-09 2018-04-24 Sonos, Inc. Audio processing algorithms
US10664224B2 (en) 2015-04-24 2020-05-26 Sonos, Inc. Speaker calibration user interface
US9538305B2 (en) 2015-07-28 2017-01-03 Sonos, Inc. Calibration error conditions
US9693165B2 (en) 2015-09-17 2017-06-27 Sonos, Inc. Validation of audio calibration using multi-dimensional motion check
EP3351015B1 (de) 2015-09-17 2019-04-17 Sonos, Inc. Erleichtern der kalibrierung einer audiowiedergabevorrichtung
US9743207B1 (en) 2016-01-18 2017-08-22 Sonos, Inc. Calibration using multiple recording devices
US10003899B2 (en) 2016-01-25 2018-06-19 Sonos, Inc. Calibration with particular locations
US11106423B2 (en) 2016-01-25 2021-08-31 Sonos, Inc. Evaluating calibration of a playback device
US9864574B2 (en) 2016-04-01 2018-01-09 Sonos, Inc. Playback device calibration based on representation spectral characteristics
US9860662B2 (en) 2016-04-01 2018-01-02 Sonos, Inc. Updating playback device configuration information based on calibration data
US9763018B1 (en) 2016-04-12 2017-09-12 Sonos, Inc. Calibration of audio playback devices
US9794710B1 (en) 2016-07-15 2017-10-17 Sonos, Inc. Spatial audio correction
US10372406B2 (en) 2016-07-22 2019-08-06 Sonos, Inc. Calibration interface
US10459684B2 (en) * 2016-08-05 2019-10-29 Sonos, Inc. Calibration of a playback device based on an estimated frequency response
US10878797B2 (en) * 2017-09-15 2020-12-29 Harman International Industries, Incorporated Frequency-based causality binary limiter for active noise control systems
US11206484B2 (en) 2018-08-28 2021-12-21 Sonos, Inc. Passive speaker authentication
US10299061B1 (en) 2018-08-28 2019-05-21 Sonos, Inc. Playback device calibration
US10734965B1 (en) 2019-08-12 2020-08-04 Sonos, Inc. Audio calibration of a portable playback device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973112A (en) * 1974-07-29 1976-08-03 Time/Data Corporation System for determining transfer function
JPS53120401A (en) * 1977-03-29 1978-10-20 Matsushita Electric Ind Co Ltd Sound reproducing system
DE2830837C2 (de) * 1977-07-15 1983-06-09 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Verfahren und Vorrichtung zur Messung der Kennwerte eines Lautsprechers
JPS5439120A (en) * 1977-07-15 1979-03-26 Toshiba Corp Speaker characteristics measuring device
JPS5630397A (en) * 1979-08-21 1981-03-26 Yoshio Yamazaki Additional device for howling prevention
US4306113A (en) * 1979-11-23 1981-12-15 Morton Roger R A Method and equalization of home audio systems
US4316060A (en) * 1980-01-04 1982-02-16 Dbx, Inc. Equalizing system
US4458362A (en) * 1982-05-13 1984-07-03 Teledyne Industries, Inc. Automatic time domain equalization of audio signals
US4549289A (en) * 1983-06-20 1985-10-22 Jack Schwartz Method for correcting acoustic distortion

Also Published As

Publication number Publication date
KR840008072A (ko) 1984-12-12
JPH0787633B2 (ja) 1995-09-20
DK157645B (da) 1990-01-29
AU2473684A (en) 1984-08-30
DK79484D0 (da) 1984-02-20
EP0119645B1 (de) 1988-05-11
DK79484A (da) 1984-08-24
CA1210095A (en) 1986-08-19
NL8300671A (nl) 1984-09-17
SG50290G (en) 1990-08-31
KR910002199B1 (ko) 1991-04-06
US4628530A (en) 1986-12-09
JPS59158700A (ja) 1984-09-08
AU565544B2 (en) 1987-09-17
EP0119645A1 (de) 1984-09-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8339 Ceased/non-payment of the annual fee