Filter compressor (102, 501) for generating compressed subband filter impulse responses from input subband filter impulse responses corresponding to subbands, which comprise filter impulse response values at filter taps, comprising: a processor for examining the filter impulse response values from at least two input subband filter impulse responses to find filter impulse response values having values in a first set of values, and at least one filter impulse response value having a second value the second value being lower than the values in the first set of values; and a filter impulse response calculator for calculating the compressed subband filter impulse responses using the filter impulse response values having the values in the first set of values, wherein the filter impulse response calculator is adapted to calculate the compressed subband filter impulse responses such that the compressed subband filter impulse responses do not include filter impulse response values corresponding to filter taps of the at least one filter impulse response value having the second value; or comprise zero-valued filter impulse response values corresponding to filter taps of the at least one filter impulse response value having the second value, wherein one or more filter impulse response values is or are close to an aliasing level of a filterbank used for generating the input subband filter impulse responses, and wherein the filter compressor (102, 501) is configured to setting to zero or not include filter impulse response values, when the value of a filter impulse response value is close to an aliasing level of the filterbank. a processor for examining the filter impulse response values from at least two input subband filter impulse responses to find filter impulse response values having values in a first set of values, and at least one filter impulse response value having a second value the second value being lower than the values in the first set of values; and a filter impulse response calculator for calculating the compressed subband filter impulse responses using the filter impulse response values having the values in the first set of values, wherein the filter impulse response calculator is adapted to calculate the compressed subband filter impulse responses such that the compressed subband filter impulse responses do not include filter impulse response values corresponding to filter taps of the at least one filter impulse response value having the second value; or comprise zero-valued filter impulse response values corresponding to filter taps of the at least one filter impulse response value having the second value, do not include filter impulse response values corresponding to filter taps of the at least one filter impulse response value having the second value; or comprise zero-valued filter impulse response values corresponding to filter taps of the at least one filter impulse response value having the second value, wherein one or more filter impulse response values is or are close to an aliasing level of a filterbank used for generating the input subband filter impulse responses, and wherein the filter compressor (102, 501) is configured to setting to zero or not include filter impulse response values, when the value of a filter impulse response value is close to an aliasing level of the filterbank.