Patent ID: 8719011
Filing Date: 2014-05-06
Classification: G10L

Abstract:
1. A coding apparatus that quantizes and encodes a frequency spectrum of a transformed residual component resulting from a linear predictive coding (LPC) inverse-filtering, with a shape vector which includes a plurality of pulses and a gain vector, the apparatus comprising: an LPC analyzer that performs a linear prediction analysis of an input speech signal and outputs a spectral envelope parameter; an inverse filter that inverse-filters the input speech signal using the spectral envelope parameter and outputs a residual component; an orthogonal transformer that transforms the residual component into a frequency domain, and outputs the frequency spectrum of the transformed residual component; a shape quantizer that divides the frequency spectrum of the transformed residual component into a plurality of sub-bands and performs a 1 a gain quantizer that encodes the gain vector based on the 1