ATE467316T1 - Spatially robust audio pre-compensation - Google Patents

Spatially robust audio pre-compensation

Info

Publication number
ATE467316T1
ATE467316T1 AT08102812T AT08102812T ATE467316T1 AT E467316 T1 ATE467316 T1 AT E467316T1 AT 08102812 T AT08102812 T AT 08102812T AT 08102812 T AT08102812 T AT 08102812T AT E467316 T1 ATE467316 T1 AT E467316T1
Authority
AT
Austria
Prior art keywords
filter
causal
minimum phase
impulse response
response
Prior art date
Application number
AT08102812T
Other languages
German (de)
Inventor
Lars Johan Braennmark
Mikael Sternad
Anders Ahlen
Original Assignee
Dirac Res Ab
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 Dirac Res Ab filed Critical Dirac Res Ab
Application granted granted Critical
Publication of ATE467316T1 publication Critical patent/ATE467316T1/en

Links

Classifications

    • 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
    • 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
    • H04S7/307—Frequency adjustment, e.g. tone control

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

A discrete-time audio precompensation filter is designed based on a linear model that describes the dynamic response of a sound generating system at p > 1 listening positions. The filter construction is based on providing information (S2) representative of n non-minimum phase zeros { z i } that are outside of the stability region l z l = 1 in the complex frequency domain. A causal Finite Impulse Response (FIR) filter, of user-specified degree d , having coefficients corresponding to a causal part of a delayed non-causal impulse response is determined (S4) based on the information representative of n non-minimum phase zeros. The resulting precompensation filter is determined (S5) as the product of at least two scalar dynamic systems, represented by an inverse of a characteristic scalar magnitude response (S3) in the frequency domain that represents the power gains at the listening positions, and the causal Finite Impulse Response (FIR) filter designed (S4) to approximately invert only non-minimum phase zeros that can be safely inverted.
AT08102812T 2008-03-20 2008-03-20 Spatially robust audio pre-compensation ATE467316T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08102812A EP2104374B1 (en) 2008-03-20 2008-03-20 Spatially robust audio precompensation

Publications (1)

Publication Number Publication Date
ATE467316T1 true ATE467316T1 (en) 2010-05-15

Family

ID=39672149

Family Applications (1)

Application Number Title Priority Date Filing Date
AT08102812T ATE467316T1 (en) 2008-03-20 2008-03-20 Spatially robust audio pre-compensation

Country Status (3)

Country Link
EP (1) EP2104374B1 (en)
AT (1) ATE467316T1 (en)
DE (1) DE602008001155D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2595896C2 (en) * 2012-03-22 2016-08-27 Дирак Рисерч Аб Circuit of preliminary controller of correcting audio using alternating supporting set of loudspeakers
US8970455B2 (en) 2012-06-28 2015-03-03 Google Technology Holdings LLC Systems and methods for processing content displayed on a flexible display
US9426600B2 (en) * 2012-07-06 2016-08-23 Dirac Research Ab Audio precompensation controller design with pairwise loudspeaker channel similarity
US8798283B2 (en) 2012-11-02 2014-08-05 Bose Corporation Providing ambient naturalness in ANR headphones
US9020160B2 (en) * 2012-11-02 2015-04-28 Bose Corporation Reducing occlusion effect in ANR headphones
CN108337015B (en) * 2017-12-26 2019-09-20 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） A kind of pseudo-code method for catching and device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7215787B2 (en) * 2002-04-17 2007-05-08 Dirac Research Ab Digital audio precompensation
JP4496186B2 (en) * 2006-01-23 2010-07-07 株式会社神戸製鋼所 Sound source separation device, sound source separation program, and sound source separation method
JP2007279517A (en) * 2006-04-10 2007-10-25 Kobe Steel Ltd Sound source separating device, program for sound source separating device, and sound source separating method

Also Published As

Publication number Publication date
EP2104374A1 (en) 2009-09-23
DE602008001155D1 (en) 2010-06-17
EP2104374B1 (en) 2010-05-05

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