Method and apparatus for a tunable high-resolution spectral...

Details Method and apparatus for a tunable high-resolution spectral... Method and apparatus for a tunable high-resolution spectral...

G - Physics

10

L

G10L 19/06 (2006.01) G10L 11/00 (2006.01)

Patent

CA 2347187

A tunable high resolution spectral estimator (Fig. 18) method and apparatus for encoding and decoding signals, signal analysis and synthesis, and for performing high resolution spectral estimation. An encoder coupled with either or both of a signal synthesizer and a spectral analyzer is used to process a frame of a time-based input signal by passing it through a bank of lower order filters and estimating a plurality of lower order covariances from which a plurality of filter parameters may be determined. The signal synthesizer includes a decoder for processing the covariances and a parameter transformer for determining filter parameters for an ARMA filter.

On décrit un estimateur spectral à haute résolution accordable ainsi qu'un procédé et un appareil permettant de coder et de décoder des signaux, d'effectuer l'analyse et la synthèse du signal ainsi que l'estimation spectrale à haute résolution. Un codeur couplé à un synthétiseur de signal et/ou à un analyseur spectral est utilisé pour traiter une trame d'un signal d'entrée à base temporelle, ce traitement consistant à le faire traverser un banc de filtres d'ordre inférieur et à estimer une pluralité de paramètres de filtres. Le synthétiseur de signal comprend un décodeur qui traite les covariances et un transformateur de paramètres qui détermine les paramètres de filtre d'un filtre ARMA.

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