Title :
Complexity-effective auditory compensation for digital hearing aids
Author :
Kuo, Yu Ting ; Lin, Tay Jyi ; Chang, Wei Han ; Li, Yueh Tai ; Liu, Chih Wei ; Young, Shuenn Tsong
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu
Abstract :
This paper describes a complexity-effective design of auditory compensation, which is the most important building block in digital hearing aids. A multi-rate architecture and the filter bank design thereof are proposed to significantly reduce the data rates of the band-limited channels and thus the computational complexity. Several optimizations are discussed to further simplify the implementation of the dynamic range compressors in the multi-rate auditory compensation. In an 18-band 24-KHz digital hearing aid, 94% multiplications and additions are saved from a straightforward filter bank design. Moreover, the computation and memory requirements of the dynamic range compressor of each band are reduced to only 16% and 1% respectively.
Keywords :
audio signal processing; channel bank filters; hearing aids; auditory compensation; band-limited channels; computational complexity; digital hearing aids; dynamic range compressors; filter bank design; frequency 24 kHz; Auditory system; Bandwidth; Compressors; Deafness; Dynamic range; Filter bank; Finite impulse response filter; Frequency; Hearing aids; IIR filters;
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
DOI :
10.1109/ISCAS.2008.4541707
