Method and apparatus for sinusoidal identification for packet loss concealment

A decoder comprising:

• a processing circuitry;
• and
• a memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the decoder to perform operations to determine whether or not to mute valley bins in a frequency domain, FD, evolution step of a packet loss concealment in the decoder, the decoder, the operations comprising:
• obtaining an initial number of peaks, n_plocs, and peak locations, plocs, of the audio signal;
• if the number of peaks indicated by n_plocs is 1 or 2, performing, using the plocs, a non-pure sinusoidal analysis to determine whether or not the audio signal is a pure sinusoid;
• responsive to determining that the audio signal is not a pure sinusoid, not muting the valley bins in the FD evolution step;
• and
• responsive to determining that the audio signal is a pure sinusoid, muting the valley bins in the FD evolution step.