Multi-pulse type encoder having a low transmission rate

Details Multi-pulse type encoder having a low transmission rate Multi-pulse type encoder having a low transmission rate

G - Physics

10

L

354/47

G10L 5/00 (1990.01)

Patent

CA 1334688

In an encoder for encoding a speech signal having a spectrum envelope into a plurality of excitation pulses, a spectrum emphasis unit emphasizes peak components of the spectrum envelope to produce an emphasized speech signal. As a result of a spectrum emphasis operation, the emphasized speech signal has an emphasized spectrum envelope which substantially comprises a plurality of line spectra. Responsive to the emphasized speech signal, a pulse producing unit produces a plurality of excitation pulses by the use of a pulse search method.

558067

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