Segmentation Use of a window function: hanning Without window overlap: not very smooth sound, many glitches With window overlap: slightly smoother, but sometimes messy pitch and intonation
V/U/S detector Goal was the lpc-10e standard: weighted voicing detection using several indicators → too little information, well hidden Tremain paper In the end: a fairly simple speaker independent (normalized!) voicing detector using MSF, ZCR and pitch information
Demonstration LPC No window overlap – High pitch (female) – Low pitch (male) Window overlap – High pitch (female) – Low pitch (male) – Own voice → more noise
LPC vocoder and music Basic idea: replace pulse train for voiced frames with periodic elementary note shapes of a music instrument, at a frequency corresponding to the pitch. No access to such libraries Therefore: channel vocoder…
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