Method and apparatus for sinusoidal audio coding, and method and apparatus for sinusoidal audio decoding

摘要

A method and apparatus for sinusoidal audio coding and decoding are provided. The method for sinusoidal audio coding includes performing sinusoidal analysis on an input signal and extracting sinusoids of a current frame; tracking and coding a continuation mode sinusoid of the current frame by using a sinusoid of a previous frame which continues to the continuation mode sinusoid; searching for a sinusoid having a closest frequency to a frequency of a birth mode sinusoid of the current frame; calculating and coding a difference between an amplitude of the sinusoid having the closest frequency and an amplitude of the birth mode sinusoid; and coding the frequency of the birth mode sinusoid.