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>
申请公布号
EP1339040(A4)
申请公布日期
2005.09.14
申请号
EP20010998967
申请日期
2001.11.29
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;NIPPON TELEGRAPH AND TELEPHONE CORPORATION