| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent deterioration of voice quality caused by recovery process. SOLUTION: An apparatus of packet loss recovery comprises: a decode unit 3 for decoding a voice packet train 2 input from a packet network; a voice presence/absence detecting unit 6 for detecting a voice absence or presence state of each voice data in the voice packet train 2; a packet loss detecting unit 5 for detecting a packet loss in a voice packet in a frame N changed from voice absence to voice presence state; and an interpolation execution unit 12 for executing interpolation of lossy voice packet based on the voice presence data included in the voice packet in a time-delayed frame N+1 arriving later the lossy voice packet occurred in the voice packet in the frame N changed from the voice absence state to the voice presence state.</p> |
