Research Article
Cochlear Implant Speech Processing Using Wavelet Transform
Table 2
Comparison of approximate number of multiplications in various speech processing technique.
| Approximate number of real multiplications for sample frame, 128-point FFT, 22 channels, and , 24, and 30 length wavelet packet filter |
| Filter bank | FFT (N-point) | Recursive DFT update | Wavelet |
| Channels * (6th order BPF) | | Rectangular window | 2nd order all-pole window | | | | | | | | | |
| 112 k | 519 k | 100 k | 167 k | 25 k | 47 k | 57 k |
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