Patent ID: 9076442
Filing Date: 2015-07-07
Classification: G10L

Abstract:
1. A method of encoding a speech signal, the method comprising: obtaining, with a speech encoding apparatus, a linear prediction filter coefficient of a current frame from an input signal using linear prediction; obtaining, with the speech encoding apparatus, a quantized spectrum candidate vector of the current frame corresponding to the linear prediction filter coefficient of the current frame based on first best information; interpolating, with the speech encoding apparatus, the quantized spectrum candidate vector of the current frame and a quantized spectrum vector of a previous frame; generating, with the speech encoding apparatus, weighted input signal using the quantized spectrum candidate vector; and obtaining, with the speech encoding apparatus, adaptive codebook candidate based on the weighted input signal and second best information, wherein the first best information is information about a number of codebook indexes extracted in frame units, wherein the second best information is information about a number of the adaptive codebook candidate acquired in frame units.