Morphology-based single band compression algorithm for digital hearing aids
Xianbo Xiao · Journal of Tsinghua University(Science and Technology) · 2005
A new compression algorithm was developed to improve speech intelligibility in digital hearing aids.Morphology methods were used to localize the spectral cues,including formats and the spectral envelope.Gain values were interpolated to get the entire amplified spectrum.An inverse IFFT transformation was used to provide time-domain waveform output.Logical judgments and addition operations were used for spectral cues localization.As a result,the computations were dramatically reduced with simulation results indicating that the formats and spectral envelope were perfectly preserved.Primary speech intelligibility tests with severely hearing impaired people demonstrated that algorithm users achieve higher scores in consonant recognition tests and speech intelligibility tests in low noise circumstance than traditional LPC algorithm users.