Efficient uniform digital filter bank with linear phase and FRM technique for hearing aids

 
 
 
  • Abstract
  • Keywords
  • References
  • PDF
  • Abstract


    This paper attempts to present an uniform digital filter bank based on linear phase FIR and IIR filters applied for Frequency Response Masking (FRM) technique in hearing aid applications.In the proposed filter bank, nine uniformly spaced sub-bands are formed with the help of half band filters and masking filters. These nine channel FIR filter bank is realized using an interpolated half band linear phase FIR filter and an appropriate number of masking FIR filters. The nine channel IIR filter bank is realized using an interpolated half band approximately linear phase IIR filter and an appropriate number of masking filters. The proposed approximately linear phase IIR half band filter bank is compared with filter bank based on linear phase FIR half band filters in terms of area, power, memory and number of gates needed for implementation. The experiment was carried on various hearing loss cases and the results obtained from these tests proves that, the proposed filter bank achieved the required matching between audiograms and magnitude response of the filter bank at very reasonable range with less computational complexity.


  • Keywords


    FIR and IIR Filter Banks; Frequency Response Masking; Approximately Linear Phase IIR Filter.

  • References


      [1] Lian Y & Wei Y, “A computationally efficient nonuniform FIR digital filter bank for hearing aids”, IEEE Transactions on Circuits and Systems I: Regular Papers, Vol.52, No.12, (2005), pp.2754-2762.https://doi.org/10.1109/TCSI.2005.857871.

      [2] Elias E & George JT, “A 16-band reconfigurable hearing aid using variable bandwidth filters”, Global Journal of Research In Engineering, Vol.14, No.1, (2014).

      [3] Lim YC, “Frequency Response Masking Approach for the Synthesis of Sharp Linear Phase Digital Filters”, IEEE Transaction on Circuits and Systems, Vol.33, No.4, (1986).

      [4] Ćertić JD, Lutovac MD &Milic LD, “Digital filter banks with approximately liner phase”, 20th Telecommunications Forum (TELFOR), (2012), pp.768-771.

      [5] Lim Y, “Frequency-response masking approach for the synthesis of sharp linear phase digital filters”, IEEE transactions on circuits and systems, Vol.33, No.4, (1986), pp.357-364.https://doi.org/10.1109/TCS.1986.1085930.

      [6] Johansson H &Wanhammar L, “High-speed recursive digital filters based on the frequency-response masking approach”, IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, Vol.47, No.1, (2000), pp.48-61.https://doi.org/10.1109/82.818894.

      [7] Chong KS, Gwee BH & Chang JS, “A 16-channel low-power nonuniform spaced filter bank core for digital hearing aids”, IEEE Transactions on Circuits and Systems II: Express Briefs, Vol.53, No.9, (2006), pp.853-857.https://doi.org/10.1109/TCSII.2006.881821.

      [8] Kuo YT, Lin TJ, Li YT & Liu CW, “Design and implementation of low-power ANSI S1. 11 filter bank for digital hearing aids”, IEEE Transactions on Circuits and Systems I: Regular Papers, Vol.57, No.7, (2010), pp.1684-1696.https://doi.org/10.1109/TCSI.2009.2033539.

      [9] Pantic RD, “Efficiency analysis of one class of uniform linear phase filter banks”, 20th Telecommunications Forum (TELFOR), (2012), pp.1721-1724.https://doi.org/10.1109/TELFOR.2012.6419559.

      [10] Ćertić JD, Lutovac MD &Milić LD, “Approximately Liner Phase, IIR Digital Filter Banks”, Telfor Journal, Vol.5, No.2, (2013), pp.107-112.

      [11] Lutovac MD &Milic LD, “IIR filters based on frequency-response masking approach”, 5th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, Vol.1, (2001), pp.163-170.https://doi.org/10.1109/TELSKS.2001.954867.

      [12] Milić L, Ćertić J &Lutovac M, “A class of FRM-based all-pass digital filters with applications in half-band filters and Hilbert transformers”, International Conference on Green Circuits and Systems (ICGCS), (2010), pp.273-278.

      [13] Jagadale BN, “Interpolated FIR Filter Design and its Frequency Response”, Journal of Computer Science & Math. Sci., Vol.3, No.4, (2012), pp.422-497.

      [14] Bauml RW &Sorgel W, “Uniform polyphase filter banks for use in hearing aids: design and constraints”, 16th European Signal Processing Conference, (2008), pp.1-5.

      [15] Haridas N & Elias E, “Efficient variable bandwidth filters for digital hearing aid using Farrow structure”, Journal of advanced research, Vol.7, No.2, (2016), pp.255-262.https://doi.org/10.1016/j.jare.2015.06.002.

      [16] Haridas N & Elias E, “Design of reconfigurable low-complexity digital hearing aid using Farrow structure based variable bandwidth filters”, Journal of applied research and technology, Vol.14, No.2, (2016), pp.154-165.https://doi.org/10.1016/j.jart.2016.03.005.

      [17] Khoubrouy SA & Panahi IM, “An efficient delayless sub-band filtering for adaptive feedback compensation in hearing aid”, Journal of Signal Processing Systems, Vol.83, No.3, (2016), pp.401-409.https://doi.org/10.1007/s11265-015-1028-y.

      [18] Sebastian A, Ragesh MN & James TG, “A low complex 10-band non-uniform FIR digital filter bank using frequency response masking technique for hearing aid”, First International Conference on Computational Systems and Communications, (2014), pp.167-172.https://doi.org/10.1109/COMPSC.2014.7032641.


 

View

Download

Article ID: 9738
 
DOI: 10.14419/ijet.v7i1.9.9738




Copyright © 2012-2015 Science Publishing Corporation Inc. All rights reserved.