Title :
Speech signal reconstruction for real-time voice transmission over the Internet
Author :
Zagursky, V. ; Riekstinch, A.
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 nonadaptive and adaptive interpolation. For the loss of 25% packets and second order adaptive interpolation are 2-4% error distribution range has been achieved.
Keywords :
Internet; interpolation; packet switching; source separation; speech processing; voice communication; Internet; error distribution range; first-second adaptive interpolation; first-second-order nonadaptive interpolation; interpolation; packet loss; packet switched communications network transmission; reverse permutation; signal correlation property; signal fragment sample; source signal separation; speech signal reconstruction; speech signal shape recovery; voice transmission; Computer science; Electronic mail; IP networks; Internet; Interpolation; Packet switching; Pulse modulation; Shape; Signal reconstruction; Speech;
Conference_Titel :
Video/Image Processing and Multimedia Communications, 2003. 4th EURASIP Conference focused on
Print_ISBN :
953-184-054-7
DOI :
10.1109/VIPMC.2003.1220522
