Efficient adaptive vector quantization of LPC parameters
Miguel A. Ferrer, Aníbal Ramón Figueiras-Vidal · IEEE Transactions on Speech and Audio Processing · 1995
This correspondence presents a new two-stage adaptive vector quantizer of LSF parameters in LPC speech coding. The first codebook is adapted by a partition-delete operation, whereas the code-vectors of the second codebook remain unchanged. The objective and subjective evaluations show that the proposed scheme offers transparent quantization with 22 b/frame.>