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WO2002026000A3 - A method of synthesising an approximate impulse response function - Google Patents

A method of synthesising an approximate impulse response function Download PDF

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Publication number
WO2002026000A3
WO2002026000A3 PCT/GB2001/004027 GB0104027W WO0226000A3 WO 2002026000 A3 WO2002026000 A3 WO 2002026000A3 GB 0104027 W GB0104027 W GB 0104027W WO 0226000 A3 WO0226000 A3 WO 0226000A3
Authority
WO
WIPO (PCT)
Prior art keywords
impulse response
synthesising
function
response function
impulse
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.)
Ceased
Application number
PCT/GB2001/004027
Other languages
French (fr)
Other versions
WO2002026000A2 (en
Inventor
Alastair Sibbald
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.)
Central Research Laboratories Ltd
Original Assignee
Central Research Laboratories 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 Central Research Laboratories Ltd filed Critical Central Research Laboratories Ltd
Priority to JP2002528242A priority Critical patent/JP2004509376A/en
Priority to EP01965411A priority patent/EP1374637A2/en
Priority to GB0305710A priority patent/GB2389288A/en
Publication of WO2002026000A2 publication Critical patent/WO2002026000A2/en
Anticipated expiration legal-status Critical
Publication of WO2002026000A3 publication Critical patent/WO2002026000A3/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04S7/305—Electronic adaptation of stereophonic audio signals to reverberation of the listening space
    • 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
    • H04S1/005—For headphones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals
    • 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
    • H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • User Interface Of Digital Computer (AREA)
  • Steroid Compounds (AREA)
  • Telephone Function (AREA)

Abstract

A method of synthesising an approximate impulse response function from a measured first impulse response function in a given sound field includes: - sampling an early part of the impulse response for the given sound field; synthesising a part impulse response which approximates to the sampled part of the given impulse response by curve fitting using a plurality of basis functions provided by respective multi-tap FIR filters, said part impulse response including scattering artefacts; synthesising subsequent further part impulse responses using the same filters; appyling an envelope function which decrease the amplitude with increasing time, and constructing an extended approximate impulse response by combining successive part impulse responses with irregular overlap to minimise audible artefacts. The synthesised impulse response fuction has psycho-acoustic properties similar to thse of the original impulse response function, and enables fewer taps to be employed.
PCT/GB2001/004027 2000-09-19 2001-09-10 A method of synthesising an approximate impulse response function Ceased WO2002026000A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2002528242A JP2004509376A (en) 2000-09-19 2001-09-10 How to synthesize an approximate impulse response function
EP01965411A EP1374637A2 (en) 2000-09-19 2001-09-10 A method of synthesising an approximate impulse response function
GB0305710A GB2389288A (en) 2000-09-19 2001-09-10 A method of synthesising an approximate impulse response function

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0022892.4 2000-09-19
GB0022892A GB2366976A (en) 2000-09-19 2000-09-19 A method of synthesising an approximate impulse response function

Publications (2)

Publication Number Publication Date
WO2002026000A2 WO2002026000A2 (en) 2002-03-28
WO2002026000A3 true WO2002026000A3 (en) 2003-10-09

Family

ID=9899678

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/004027 Ceased WO2002026000A2 (en) 2000-09-19 2001-09-10 A method of synthesising an approximate impulse response function

Country Status (4)

Country Link
EP (1) EP1374637A2 (en)
JP (1) JP2004509376A (en)
GB (2) GB2366976A (en)
WO (1) WO2002026000A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011088346B4 (en) * 2011-12-13 2022-01-05 Robert Bosch Gmbh Device for detecting acoustic signals and the associated method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369710A (en) * 1992-03-23 1994-11-29 Pioneer Electronic Corporation Sound field correcting apparatus and method
EP0687130A2 (en) * 1994-06-08 1995-12-13 Matsushita Electric Industrial Co., Ltd. Reverberant characteristic signal generation apparatus
GB2314749A (en) * 1996-06-28 1998-01-07 Mitel Corp Sub-band echo canceller
EP0827361A2 (en) * 1996-08-29 1998-03-04 Fujitsu Limited Three-dimensional sound processing system
JPH11243598A (en) * 1997-10-31 1999-09-07 Yamaha Corp Digital filter processing method, digital filtering device, recording medium, fir filter processing method and sound image localizing device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5371799A (en) * 1993-06-01 1994-12-06 Qsound Labs, Inc. Stereo headphone sound source localization system
WO1999051062A1 (en) * 1998-03-31 1999-10-07 Lake Technolgy Limited Formulation of complex room impulse responses from 3-d audio information
JP3460602B2 (en) * 1998-11-25 2003-10-27 ヤマハ株式会社 Reflection sound generator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369710A (en) * 1992-03-23 1994-11-29 Pioneer Electronic Corporation Sound field correcting apparatus and method
EP0687130A2 (en) * 1994-06-08 1995-12-13 Matsushita Electric Industrial Co., Ltd. Reverberant characteristic signal generation apparatus
GB2314749A (en) * 1996-06-28 1998-01-07 Mitel Corp Sub-band echo canceller
EP0827361A2 (en) * 1996-08-29 1998-03-04 Fujitsu Limited Three-dimensional sound processing system
JPH11243598A (en) * 1997-10-31 1999-09-07 Yamaha Corp Digital filter processing method, digital filtering device, recording medium, fir filter processing method and sound image localizing device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 14 22 December 1999 (1999-12-22) *

Also Published As

Publication number Publication date
EP1374637A2 (en) 2004-01-02
GB0022892D0 (en) 2000-11-01
GB2389288A (en) 2003-12-03
WO2002026000A2 (en) 2002-03-28
GB0305710D0 (en) 2003-04-16
JP2004509376A (en) 2004-03-25
GB2366976A (en) 2002-03-20

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