Adaptive filter device and method for determining filter coefficients
AssigneeSony Deutschland GmbH
InventorBen Eitel
Life of this patent
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Abstract
An adaptive filter device, including a finite impulse response (FIR) filter which is based on filter coefficients, which are determined based on a predetermined iterative adaptation algorithm for determining filter coefficients of an adaptive filter, wherein, in at least one iteration step of said predetermined iterative adaptation algorithm a sum value is determined, wherein each summand of said sum value depends on one of said filter coefficients, and, if said sum value is above a predetermined threshold, the filter coefficients are modified.
Claims28
An adaptive filter device, comprising:
- a finite impulse response (FIR) filter which is based on filter coefficients, which are determined based on a predetermined iterative adaptation algorithm for determining filter coefficients of an adaptive filter,
- wherein, in at least one iteration step of said predetermined iterative adaptation algorithm a sum value is determined, wherein at least one summand of said sum value depends on at least one of said filter coefficients, and, if said sum value is above a predetermined threshold, the filter coefficients are modified.
A method for determining filter coefficients of a finite impulse response (FIR) filter of an adaptive filter device, comprising
- determining said filter coefficients based on a predetermined iterative adaptation algorithm for determining filter coefficients of an adaptive filter,
- determining, in at least one iteration step of said predetermined iterative adaptation algorithm, a sum value, wherein each summand of said sum value depends on one of said filter coefficients,
- modifying, if said sum value is above a predetermined threshold, the filter coefficients.
An adaptive filter device comprising a finite impulse response (FIR) filter which is based on filter coefficients,
- wherein said filter coefficients are determined based on first filter coefficients and depending on a sum value, wherein each summand of said sum value depends on one of said filter coefficients, and
- wherein, if said sum value is below a predefined threshold, said filter coefficients are equal to said first filter coefficients, and, if said sum value is equal to or above said predefined threshold, said filter coefficients are determined such that said sum value becomes smaller than said predefined threshold.
An adaptive filter device which is based on filter coefficients,
- wherein said filter coefficients are determined based on first filter coefficients and depending on a sum value, wherein each summand of said sum value depends on one of said filter coefficients, and
- wherein, if said sum value is below a predefined threshold, said filter coefficients are equal to said first filter coefficients, and, if said sum value is equal to or above said predefined threshold, said filter coefficients are determined such that said sum value becomes smaller than said predefined threshold.
Dependencies are inferred from the claim text.