Lpc vector quantization apparatus

Details Lpc vector quantization apparatus Lpc vector quantization apparatus

G - Physics

10

L

G10L 19/04 (2006.01) H04W 28/06 (2009.01) G10L 19/12 (2006.01) H03M 7/30 (2006.01)

Patent

CA 2733453

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.

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