Title :
Speech signal recovery in packet-switched communication networks
Author :
Ginters, E. ; Zagursky, V.
Author_Institution :
Inst. of Electron. & Comput. Sci., Latvian Univ., Latvia
Abstract :
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.
Keywords :
interpolation; losses; packet switching; speech processing; adaptive interpolation; correlation properties; first order interpolation; missing samples; nonadaptive interpolation; packet losses; packet-switched communication networks; recovery; reverse permutation; samples; second order interpolation; shape recovery; signal fragments; source signal; speech signal recovery; Communication networks; Communication switching; Computer errors; Intelligent networks; Interpolation; Packet switching; Pulse modulation; Shape; Smoothing methods; Speech;
Conference_Titel :
Electrotechnical Conference, 2000. MELECON 2000. 10th Mediterranean
Print_ISBN :
0-7803-6290-X
DOI :
10.1109/MELCON.2000.879984
