VECTOR QUANTIZING DEVICE FOR LPC PARAMETERS, DECODING DEVICE FOR LPC PARAMETERS, RECORDING MEDIUM, VOICE ENCODING DEVICE, VOICE DECODING DEVICE, VOICE SIGNAL TRANSMITTING DEVICE, AND VOICE SIGNAL RECEIVING DEVICE

摘要

The present invention carries out pre-selection on many LPC codevectors stored in an LSF codebook 101 using a weighted Euclidean distortion as a measure and carries out a full-code selection on the LPC codevectors left after the pre-selection using an amount of distortion in a spectral space as a measure. This makes it possible to improve the quantization performance of the LPC parameter vector quantizer and improve the quality of synthesized speech of the speech coder/decoder. IMAGE