Sip - Societa Italiana Per L'esercizio Delle Telecommunicazioni

Rosario Drogo De Iacovo

Daniele Sereno

Roberto Montagna

A low-delay audio signal coding system, using analysis-by-synthesis techniques, has circuitry for adapting the spectral parameters and the prediction order of synthesis filters, and of perceptual weighting filters in the order at each frame, starting from the reconstructed signal relevant to the previous frame. In the case of a CELP coder, gain controls are also provided to adapt, starting from the reconstructed sinal, a factor, bound to the average power of the input signal, of the gain by which the innovation vectors are weighted.

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Rocco Imperiale Marina, Italy

Rosario Drogo De Iacovo