Patent ID: 8654761

Claim:
A method, comprising: receiving, at a network device, Internet Protocol (IP) packets that include audio information; storing, by the network device, the IP packets in a buffer; examining, by the network device, an audio waveform based on the audio information included in the IP packets in the buffer; determining, by the network device, presence of an erasure in a portion of the audio waveform; responsive to determining the presence of the erasure: identifying an extant pitch included in the audio waveform preceding the erasure, and determining a first overlay add (OLA) on a last quarter pitch wavelength of the audio waveform preceding the erasure; and generating, by the network device and in the portion of the audio waveform corresponding to the erasure, a synthesized signal including: a first pitch and a second pitch that are based on the identified pitch and directly connected to one another, the first and the second pitches positioned following the first OLA, and a second OLA on a first quarter pitch wavelength of the audio waveform succeeding the erasure, the second OLA positioned following the first and the second pitches, wherein characteristics of an extended ending portion of the synthesized signal are based on the first OLA.