Speech signal recovery in packet-switched communication networks
E. Ginters, Valery Zagursky · 2005
Interpolation approaches to shape recovery of a speech signal transmitted over packet switched communications networks are proposed. The samples of signal fragments are mixed and transmitted in correspondence with the standard procedure of packet-switched transmission. After reception a reverse permutation is made. In the case of packet losses missing samples are separated by several samples of the source signal. Correlation properties of the signal are used for the recovery of samples due to first- and second-order non-adaptive and adaptive interpolation. For the loss of 25% of packets and second order adaptive interpolation a 2-4% error distribution range has been achieved.