Patent ID: 9461900
Filing Date: 2016-10-04
CPC Classification: G01R,G10L,H04L,H04N

Claim Text:
1. A signal processing apparatus which processes a voice packet, comprising: a network jitter measurer which estimates network jitter using information on a received voice packet and a weighting of a network jitter variance and determines a network state by comparing the estimated network jitter with a spike detection threshold value; a loss concealer which divides a voice packet loss into short-term loss concealment and long-term loss concealment when there is the voice packet loss, and generates a loss concealment signal by performing loss concealment in a different way depending on whether the voice packet loss is the short-term loss concealment or the long-term loss concealment; and a compression and output unit which compresses or outputs a voice frame based on the network state and the loss concealment signal.