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Hi Friends, in the g729a recommendation, the excitation is modelled using an "algebraic codebook". what is meant by an "algebraic" codebook ?? also, the postfiltering stage of the decoder uses a tilt compensation filter to compenstate for the spectral tilt of the short-term postfilter. but why does the short-term filter introduce a spectral tilt, when it is only supposed to emphasize the formant frequencies ?? Munish. |