Time Scale Modification as a Packet loss Concealment in VoIP Applications
Hassan Yeganeh, Farid Mousavipour, Amir Hassan Darvishan
Progress in Signals and Telecommunication Engineering , Vol. 1, No. 1, 2012.
DOI: 
Link: http://dline.info/pste/fulltext/v1n1/1.pdf
Abstract:
In this work, Attempts focused on improving the voice quality in VoIP toward packet loss effect. The main aimwas to find an efficient time scale modification method for compensating lost voice samples. This work started by introducingtypical voice codecs; then, some of the well-known voice codecs were applied to the low packet loss condition and theirintrinsic resistance was evaluated. Some time scale modification methods are applied for compensating the lost packet referredas packet loss concealment (PLC) method. Codec characteristics were surveyed to determine the best method for improvingthe quality. Evaluation of quality assessment was gained by ITU P.862.1 (narrowband PESQ) score in narrowband codecs.The results show that the quality of degraded voice significantly improved.