A new sample-interpolation method for recovering missing speech samples in packet voice communications

A sample-interpolation method based on pattern matching is proposed to reduce speech quality degradation caused by packet losses. This method is used together with packet interleaving, which simplifies the recovery of missing packets to the recovery of missing sample values. The interpolation method is evaluated by an opinion test. The results show that speech quality is satisfactory up to a packet loss rate of 5% when packets are discarded randomly. It is satisfactory up to a packet loss rate of 10% when packet discarding is controlled to prevent consecutive packet losses.<<ETX>>