METHOD AND APPARATUS FOR ENCODING/DECODING AUDIO SIGNAL USING ADAPTIVE LPC COEFFICIENT INTERPOLATION

摘要

A method and an apparatus for encoding/decoding an audio signal using adaptive LPC coefficient interpolation are provided to selectively perform interpolation of a linear predictive coding coefficient within a frame in which a transient signal exists, thereby improving predictive modeling of linear predictive coding. A window determiner(220) determines a window applied to a current frame. A window application unit(230) performs windowing multiplying an audio signal of the current frame by a selected window. An LPC analyzer(240) outputs a linear predictive coefficient of the audio signal of the current frame. An LPC synthesizer(250) generates a predictive signal of an audio signal of the current frame.