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.

主权项

1. A method of sinusoidal audio coding, the method comprising:
extracting sinusoids of a current frame from an input audio signal; 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, wherein the sinusoid having the closest frequency is searched among continuation mode sinusoids of the current frame and the previous frame, and birth mode sinusoids 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, wherein the birth mode sinusoid is generated in the current frame but not continued from the previous frame, and wherein the tracking and coding is performed by a sinusoidal tracking unit which is implemented as hardware.