STC

5/27/98

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Table of Contents

Sinusoidal Speech Model

Sinusoidal Speech Parameter Estimation

Pitch Estimation

Pitch Estimation

Voicing Detection

Envelope Fitting

Frequency/Phase Model

Project Breakdown

Analysis Part Block Diagram

Pitch-Adaptive Window

Frame Windowing

Preliminary Analysis

MSE Likelihood Function

Peak Compression: Gamma Root Function

Pitch Estimation from the Correlation Function

Pitch Refinement

Voicing-adaptive comb filterbackground noise

MSE likelihood Function

Backward Tracking

Backward Tracking

Backward Pitch Estimate

Forward Tracking

Maximum MSE from (k+1) to (k+2)(Inner Loop Function)

Inner Loop Function

Forward Pitch Estimation

Coarse & Average Coarse Pitch Estimation

Forward/Backward Tracking Simulation

Average Coarse Pitch

Final Pitch Estimation

Pitch Adaptive Voicing Range

Peak Compression: Beta Root Function

Pitch Refinement

Pitch Simulations

Flattop Seevoc Envelope

MSE Optimization Criterion

Voicing Estimation

Voicing Simulations

Analysis Block Diagram

Spectral Envelopes

Advantages of SEEVOC

Harmonic cubic spline

All-pole modeling

Spectral Warping

Line Spectral Frequencies

Bit assignment and coding

Performance Comparison

What is Actually Received at the Synthesizer

STC Synthesis--Flow Chart

STC Synthesis--Flow Chart

Decoding Voicing

Decoding Spectral Gain

Decode--General Notes

Quantitative Analysis of Speech

Properties of SNR

Properties of SNR

Calculating SNR for our Speech Files

Calculating SNR for our Speech Files

Sine and Cosine--Practical Considerations

Following A 15ms (two 7.5ms Subframes) Frame Through Synthesis

Speech Before and After Synthesis

STC Synthesis--Flow Chart

Voiced Frames--Generating the Spectral Envelope

Frequency Content of this 15ms (120 Sample) Frame

Phase for Frame 18

LPC Spectrum for Frame 18

STC Synthesis--Flow Chart

Voiced Frames--Smoothing Pitch and Voicing

Voiced Frames--Smoothing Pitch and Voicing

STC Synthesis--Flow Chart

Voiced Frames--Sampling the Spectral Envelope

Sampled Harmonic Amplitudes of this Frame

Frame 18 (with 36 peaks)

STC Synthesis--Flow Chart

STC Synthesis--Flow Chart

Over Add (Overlap and Add)First 7.5ms Subframe

Over Add (Overlap and Add)Second 7.5ms Subframe

After Amplitudes, Frequencies, and Phases are Found--IFFT

After Amplitudes, Frequencies, and Phases are Found--IFFT

Inverse 512-point FFT of this Frame

Over Add--First 7.5 ms Subframe

Over Add--First 7.5 ms Subframe (Result)

STC Synthesis--Flow Chart

Over Add--Second 7.5 ms Subframe

Over Add--Second 7.5 ms Subframe (Result)

STC Synthesis--Flow Chart

Final Notes on Over Add

Speech Before and After Synthesis

STC Synthesis--Flow Chart

Some Speech Files

Author: snow