Title :
Speech signal recovery in packet-switched communication networks
Author :
Zagursky, V. ; Ginters, E.
Author_Institution :
Inst. of Electron. & Comput. Sci., Latvian State Univ., Riga, Latvia
Abstract :
The interpolation approaches to 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 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. The correlation properties of the signal are used for the recovery samples due to the first- and second-order non-adaptive and adaptive interpolation. For a loss of 25% of packets and second-order adaptive interpolation a 2-4% error distribution range has been achieved
Keywords :
adaptive signal processing; correlation methods; interpolation; packet switching; signal sampling; speech processing; telecommunication networks; voice communication; correlation properties; 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; source signal samples; speech signal recovery; speech transmission; Communication networks; Communication switching; Computer science; Intelligent networks; Interpolation; Packet switching; Pulse modulation; Shape; Smoothing methods; Speech;
Conference_Titel :
Africon, 1999 IEEE
Conference_Location :
Cape Town
Print_ISBN :
0-7803-5546-6
DOI :
10.1109/AFRCON.1999.820796
