Speech signal coder

Details Speech signal coder Speech signal coder

G - Physics

10

L

G10L 19/10 (2006.01) G10L 19/02 (2006.01)

Patent

CA 2232977

In a speech signal coder according to the present invention, spectral or pitch parameters of a speech signal are quantized, and impulse responses thereof are predicted by using a filter constituted thereby. An orthogonal transform of the speech signal or a signal derived therefrom or the impulse responses or signals derived therefrom is obtained, and the result is entirely or partly quantized to obtain a plurality of pulses. More preferably, these pulses are retrieved recurrently by also using codevectors retrieved from a codebook or collectively quantizing their senses or amplitudes. Optimization is achieved in this way.

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