Patent ID: 8532319
Filing Date: 2013-09-10
Classification: H03H,H04R

Abstract:
1. A filter bank configuration for a hearing device, comprising: an analysis filter bank having a plurality of filters; a synthesis filter bank having a plurality of filters corresponding to and coupled in pairs with respective said filters in said analysis filter bank, with each pair of coupled filters forming a channel; means provided for at least one said channel for changing a phase of a signal transmitted by said channel, in order to reduce a difference between a group delay of the filter bank configuration and a prescribable reference value for at least one predetermined frequency; and a scaling apparatus connecting at least one filter in said analysis filter bank to a corresponding said filter in said synthesis filter bank; wherein said scaling apparatus is configured to multiply a sub-band signal by a given factor, and the factor, forming said means for changing the phase in said scaling apparatus, corresponds to a complex value having the phase determined such that the difference between the group delay of the filter bank configuration and the prescribable reference value is reduced for the at least one predetermined frequency.