Patent ID: 8271270
Filing Date: 2012-09-18
Classification: G10L

Abstract:
1. A method performed on a coding apparatus, the method comprising: extracting a linear prediction coefficient (LPC) from a broadband voice signal; removing, using a processor of the coding apparatus, an envelope from the broadband voice signal using the LPC to obtain a linear prediction (LP) residual signal; pitch-searching a spectrum of the LP residual signal; extracting a plurality of spectral magnitudes and phases of the LP residual signal, which correspond to a damping factor, by adding the damping factor to a matching pursuit algorithm; obtaining, from among the extracted plurality of spectral magnitudes and phases, a first spectral magnitude and a first phase at which a power value of the LP residual signal is minimized; and quantizing the first spectral magnitude and the first phase, wherein the damping factor is determined according to a ratio of a parameter of a current frame to a parameter of a previous frame, and wherein the extracting the plurality of spectral magnitudes and phases of the LP residual signal comprises: