Implements an inverse LP filter and obtains the residual signal.
Reconstructs the speech signal from LP coefficients and residuals.
Restores the long-term information from the old speech signal.
Restores speech signal from the residuals.
Compensates for the tilt in the short-term filter.
Calculates the harmonic filter.
Calculates the G729 high-pass filter size.
Initializes the high-pass filter.
Performs G729 high-pass filtering.