Patent ID: 8520536

Claim:
An apparatus for recovering a lost voice packet, comprising: a packet loss detector for determining whether there is packet loss in a received packet; packet information storage for storing voice information of previous voice packets; a packet error corrector for measuring the information of the received packet, identifying a voiced packet and an unvoiced packet in the received packet, measuring voice information of the identified voiced packet comprising both unvoiced information and voiced information, storing the measured voice information in the packet information storage, correcting the voice information when necessary, and generating a corrected voice packet, when the received voice packet is normal; and a packet loss recoverer for recovering the voice information of the received voice packet using the voice information of previous voice packets stored in the packet information storage, and for recovering the unvoiced voice packet using a predetermined value, and generating a recovered packet, when there is packet loss in the received packet, wherein the packet information storage comprises: correction flag storage for storing a correction flag, the correction flag being set when a last recovered voice packet was recovered using unvoiced information; rate information storage for storing the data rate of a latest valid packet; and voice information storage for storing voice information of normal voice packets or the voice information of the recovered voice packet.