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Title: | Sharp Transition Multiband Filter in Speech Processing Scheme for Hearing Impaired |
Authors: | Gudino, Lucy J. |
Keywords: | Computer Science Speech Processing Hearing Impaired |
Issue Date: | Sep-2011 |
Publisher: | Joseph X. Rodrigues, Lucy J. Gudino and K. R. Pai |
Abstract: | A simple analytical approach to the synthesis of a sharp transition, linear phase, multiband FIR filter is presented. The filter magnitude response is modeled using trigonometric functions of frequency. Approach: Employing variable density of ripple cycles in passband and stopband regions with large density of ripples cycles at the sharp transition edges, reduces the abrupt discontinuities at these edges. Results: As a result, Gibb’s phenomenon is reduced in the filter implementation thus giving a flat passband and good stopband attenuation. A closed form expression for impulse response coefficients is obtained. The filter design is easily tunable and allows for variation in transition bandwidth of each band. A speech processing scheme is implemented using a pair of the proposed sharp transition multiband FIR filters to split the speech spectrum into complementary short time spectral bands. Conclusion: The adjacent speech formants are fed dichotically to the two ears to reduce the effect of spectral masking and hence improve speech perception in sensorineural hearing impaired. |
URI: | https://thescipub.com/abstract/10.3844/ajeassp.2012.42.48 http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/8577 |
Appears in Collections: | Department of Computer Science and Information Systems |
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