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Robuste Bandbreitenerweiterung schmalbandiger Sprachsignale

Authors Schulz, R.
Year 2007
Thesis Type Audio Engineering project
Topic Audio Signal Processing
Abstract Speech signals contain frequencies between 100 Hz and 8 kHz (broadband speech).In telecommunication systems speech is transmitted in a frequency range between 300 Hz and 3.4 kHz (narrowband speech). This leads to a degradation of the intelligibility of the speech, since an important part of the frequency content of fricatives like /f/ or /s/ are in the upper band (3.4 kHz – 8 kHz). This project aims at the implementation of an algorithm in MATLAB to estimate the upper band out of the narrow band. Consequently, the speech sounds more natural and the intelligibility is being increased.
Supervisors Noisternig, M.