Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Low-Power Two-Digit Multi-dimensional Logarithmic Number System Filterbank Architecture for a Digital Hearing Aid | EURASIP Journal on Applied Signal Processing 2005 18 3015-3025 2005 Hindawi Publishing Corporation A Low-Power Two-Digit Multi-dimensional Logarithmic Number System Filterbank Architecture for a Digital Hearing Aid Roberto Muscedere Research Centre for Integrated Microsystems RCIM University of Windsor ON Canada N9B3P4 Email rmusced@ Vassil Dimitrov Advanced Technology Information Processing Systems ATIPS Laboratory University of Calgary AB Canada T2N1N4 Email dimitrov@ Graham Jullien Advanced Technology Information Processing Systems ATIPS Laboratory University of Calgary AB Canada T2N1N4 Email jullien@ William Miller Research Centre for Integrated Microsystems RCIM University of Windsor ON Canada N9B3P4 Email wmiller@ Received 30 April 2004 Revised 7 December 2004 This paper addresses the implementation of a filterbank for digital hearing aids using a multi-dimensional logarithmic number system MDLNS . The MDLNS which has similar properties to the classical logarithmic number system LNS provides more degrees of freedom than the LNS by virtue of having two or more orthogonal bases and the ability to use multiple MDLNS components or digits. The logarithmic properties of the MDLNS also allow for reduced complexity multiplication and large dynamic range and a multiple-digit MDLNS provides a considerable reduction in hardware complexity compared to a conventional LNS approach. We discuss an improved design for a two-digit 2D MDLNS filterbank implementation which reduces power and area by over two times compared to the original design. Keywords and phrases logarithmic number system double-base number system multi-dimensional logarithmic number system filterbank low power hearing aids or instruments. 1. INTRODUCTION Digital signal processing for hearing aids is providing possibilities for new signal processing strategies to compensate for hearing loss 1 . Hearing loss compensation in a typical digital hearing instrument is performed
