| 摘要 |
A method and an apparatus for an audio frame loss concealment. According to the method a segment from a previously received or reconstructed audio signal is used as a prototype frame in order to create a substitution frame for a lost audio frame. The prototype frame is transformed into a frequency domain where a sinusoidal model is applied to the prototype frame to identify frequencies of sinusoidal components of the audio signal. A phase shift ¸ k is calculated and the identified sinusoidal components are phase shifted by ¸ k , while a magnitude spectrum of the prototype frame remains unchanged. The substitution frame is created by performing an inverse frequency transform of a frequency spectrum of the prototype frame. |
