A Packet Loss Recovery of G.729 Speech Using Discriminative Model and N-Gram

Author

Nagano, Takeshi ; Ito, Akinori

Author_Institution

Res. Organ. of Electr. Commun., Tohoku Univ., Sendai, Japan

fYear

2013

fDate

16-18 Oct. 2013

Firstpage

267

Lastpage

270

Abstract

In a VoIP application, packet losses degrade speech quality. Especially, IP network under a large-scale disaster should cause severe packet losses. We have investigated the relationship between parameter loss and speech quality for G.729 codec. In this paper, we propose packet loss recovery method under severe packet loss condition, where the relationship was modeled by Support Vector Machine (SVM). Compared with the "repetition" method, the proposed method could improve speech quality. When we used both SVM and N-gram for concealing packet losses, we could obtain further improvement of speech quality.

Keywords

forward error correction; speech codecs; speech coding; support vector machines; G.729 speech codec; IP network; N-gram model; SVM; VoIP; discriminative model; forward error correction; large-scale disaster; packet loss concealment methods; packet loss recovery method; parameter loss; parameter-level FEC; repetition method; speech quality; support vector machine; Bit rate; Codecs; Packet loss; Speech; Speech coding; Support vector machines; G.729; N-gram; SVM; packet loss recovery;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Information Hiding and Multimedia Signal Processing, 2013 Ninth International Conference on

Conference_Location

Beijing

Type

conf

DOI

10.1109/IIH-MSP.2013.75

Filename

6846631