EP 2104374 B1 20100505 - Spatially robust audio precompensation
Title (en)
Spatially robust audio precompensation
Title (de)
Räumlich robuste Audiovorkompensierung
Title (fr)
Précompensation audio spatialement robuste
Publication
Application
Priority
EP 08102812 A 20080320
Abstract (en)
[origin: EP2104374A1] 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.
IPC 8 full level
CPC (source: EP)
H04R 3/04 (2013.01); H04S 7/307 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2104374 A1 20090923; EP 2104374 B1 20100505; AT E467316 T1 20100515; DE 602008001155 D1 20100617
DOCDB simple family (application)
EP 08102812 A 20080320; AT 08102812 T 20080320; DE 602008001155 T 20080320