Digital Signal Processing Reference
In-Depth Information
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(a) Stationary voiced speech
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(b) Transitory speech
Figure 9.1
Harmonically-synthesized speech
coders cannot preserve waveform similarity as illustrated in the figures,
since the phase information is not transmitted. However, in the stationary
voiced segments, phase information has little importance in terms of the
perceptual quality of the synthesized speech. Stationary voiced speech has
a strong, slowly-evolving harmonic content. Therefore extracting frequency
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