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

Volume

1

fYear

1999

fDate

1999

Firstpage

203

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Africon, 1999 IEEE

Conference_Location

Cape Town

Print_ISBN

0-7803-5546-6

Type

conf

DOI

10.1109/AFRCON.1999.820796

Filename

820796