Title :
Speech signal recovery in packet-switched communication networks
Author :
Zagursky, V. ; Ginters, E.
Author_Institution :
Inst. of Electron. & Comput. Sci., Latvian Univ., Riga, Latvia
Abstract :
The interpolation approaches to the shape recovery of a speech signal in transmission over packet switched communications networks are proposed. The samples of a signal fragments are mixed and transmitted in correspondence with 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 samples due to the first- and second-order non-adaptive and adaptive interpolation. For the loss of 25% packets and second order adaptive interpolation are 2-4% error distribution range has been achieved
Keywords :
adaptive signal processing; correlation methods; interpolation; losses; packet switching; speech processing; telecommunication networks; correlation; error distribution; first order adaptive interpolation; first-order nonadaptive interpolation; packet losses; packet-switched communication networks; reverse permutation; second order adaptive interpolation; second-order nonadaptive interpolation; shape recovery; signal fragments; speech signal recovery; Communication networks; Communication switching; Computer science; Intelligent networks; Interpolation; Packet switching; Pulse modulation; Shape; Smoothing methods; Speech;
Conference_Titel :
AUTOTESTCON '99. IEEE Systems Readiness Technology Conference, 1999. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-5432-X
DOI :
10.1109/AUTEST.1999.800375
