The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2012
Filed:
Nov. 23, 2009
Daniel Alfsmann, Bochum, DE;
Heinz Goeckler, Backnang, DE;
Daniel Alfsmann, Bochum, DE;
Heinz Goeckler, Backnang, DE;
Siemens Medical Instruments Pte. Ltd., Singapore, SG;
Abstract
The circuit complexity or the filter order, respectively, of an analysis/synthesis filter bank system especially for hearing aids is to be reduced. For this reason, the stop-band attenuation of at least one of the transfer functions of the analysis filter bank is composed of a separately configurable, frequency-independent analysis basic attenuation component and a separately configurable frequency-dependent analysis attenuation component. Furthermore, the stop-band attenuation of at least one of the transfer functions of the synthesis filter bank is composed of a separately configurable, frequency-independent synthesis basic attenuation component, a separately configurable, frequency-dependent first synthesis attenuation component and a separately configurable, frequency-dependent second synthesis attenuation component which is also dependent on the manipulation of the sub-band signals. As a result, the stop-band attenuation can be reduced in dependence on frequency and the filter order can be correspondingly reduced.