Interpolation-based differential vector coding of speech LSF parameters
L. Martins da Silva, Abraham Alcaim · 2002
This paper presents a new strategy to encode the LPC spectral envelope of speech. The proposed scheme uses an interpolation-based differential vector coding of the LSF parameters in order to better track the temporal variations of the speech short-time spectral envelope. Two consecutive sets of LSF parameters are simultaneously encoded during each speech frame. Simulation results show major improvements over techniques that vector quantize a single set of LSF parameters per frame.