Method for performing packet loss concealment in complex filter bank domain

A method to conceal a lost or corrupt frame with audio content in a frame sequence, the method comprising:

• obtaining at least one first frame associated with the frame sequence, the at least one first frame being a frame of the frame sequence or a generated replacement frame;
• identifying whether a second frame, subsequent to the at least one first frame, is valid or invalid;
• when the second frame is identified as invalid, generating a set of Time-Frequency (TF) tile values for a replacement frame to replace the second frame by:
• analyzing the at least one first frame to determine a degree of tonality;
• and
• comparing the degree of tonality to a threshold value to determine if the degree of tonality exceeds the threshold value;
• when the degree of tonality exceeds the threshold value, applying a sinusoidal extension process to generate the set of TF tile values for the replacement frame;
• and
• when the degree of tonality does not exceed the threshold value, applying a linear prediction process to generate the set of TF tile values for the replacement frame;
• and
• outputting the replacement frame to replace the second frame;
• wherein the at least one first frame and the second frame are CQMF frames that each include a set of CQMF samples, wherein each of the CQMF samples comprises at least one TF tile value, wherein generating the set of TF tile values for the replacement frame further comprises:
• determining a complex parameter based on at least two TF tile values of different CQMF samples in the at least one first frame;
• and
• generating the set of TF tile values for the replacement frame by modifying a TF tile value of the at least one first frame with the complex parameter.