Adaptive transfer function estimating method and estimating device using the same
US5602765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1994 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Jul 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/30232
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an adaptive estimation of an acoustic transfer function of an unknown system, a forward linear prediction coefficient vector a(k) of an input signal x(k), the sum of forward a posteriori prediction-error squares F(k), a backward linear prediction coefficient vector b(k) of the input signal x(k) and the sum of backward a posteriori prediction-error squares B(k) are computed. Letting a step size and a pre-filter deriving coefficient vector be represented by .mu. and f(k), respectively, a pre-filter coefficient vector g(k) is calculated by a recursion formula for the pre-filter coefficient vector g(h), which is composed of the following first and second equations: ##EQU1##
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