Digital Signal Processing Chapter 7: Parametric Spectrum Estimation

example 3:vowel ”a”, german male speakerLDS in dB →0-10-20-30-40-50a) - AR(ˆn=14); -- Welch-600 0.5 1 1.5 2 2.5 3 3.5 4f in kHz →e(k) →b) Prädiktionsfehler10.80.60.40.20-0.2-0.4-0.6-0.8-10 0.02 0.04 0.06 0.08 0.1kT A /s →• − AR-model (N = 200, ˆn = 14); - - Welch estimation (N = 8000, L = 256)• prediction error not white but contains impulsespitch-frequency 1/8ms = 125Hz identifiable!application for speech coding Page 40