Mémo - Claire Bridge

List of FiguresFig. 1 Human generation of speech 5Fig. 2 basic model of speech production 5Fig. 3 comparison of voiced and unvoiced speech 6Fig. 4 Block Diagrams of CELP 7Fig. 5 Different quantization schemes for different parameters 11Fig. 6 Block diagram of a CELP synthesizer 12Fig. 7 Frequency response of perceptual weighting filters 13Fig. 8 Frequency response of the perceptual filter with different values of c 13Fig. 9 Waveform of the original and reconstructed speech signals. Only excitationindex and pitch are quantized. 14Fig. 10 Original and reconstructed waveforms. Only LP coefficients are unquantized. 15Fig. 11 Performance predicted by Zador’s formula and by experimentation. 18Fig. 12 the prediction gain of DPCM over SQ at different rates 19Fig. 13 Original and Reconstructed Speech for TSVQ with Rate = 1.2 24Fig. 14 TSVQ performance by theory and by experimentation 243