Multimedia Communications: Speech Compression

3/3/00


Click here to start


Table of Contents

Multimedia Communications: Speech Compression

Speech Waveforms

4-Bit PCM Coder

Error in 8-Bit PCM Coder

Errors in 1,5,8-Bit PCM Coders

Autocorrelation Function

First-Order Linear Prediction: LPC (1)

Differential PCM (DPCM) Coder

Backward-Adaptive 3-Bit Quantizer

Backward-Adaptive Predictor

Forward-Adaptive Predictor

Yule-Walker Equations: LPC (N)

Prediction Gain

LPC Modeling of Speech Spectrum

Spectrum and Pitch Prediction

Perceptual Noise Shaping

Code Excited Linear Prediction (CELP)

LPC Vocoder, MP-LPC and CELP

Standard Speech Coders: Performance Metrics

Quality versus Bit Rate

Demonstrations of Telephone Speech Coders