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ECE 797:Speech and Audio
ProcessingHand-out for Lecture #8
Thursday, March 11, 2004
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Distorts convolutionalmodel
Distortion from values outside the window
Effects of windowing
Length of lifterNumber of polesModel order
Aliasing problemsAliasing problemsEffects of pitch
“Natural” but “muffled”
“Crisper” but more “mechanical”
Speech synthesis
Mixed-phaseMinimum-phasePhase properties
Pole-zero modelAll-pole modelRational function representation
Wider, spurious resonances
Sharp, smooth resonances
Parametric vsnon-parametric
Homomorphic Filtering
Linear Prediction
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