Packet Loss Concealment Algorithm Based on Speech Characteristics 


Vol. 31,  No. 7, pp. 691-699, Jul.  2006


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  Abstract

Despite of the in-depth effort to control the variability in IP networks, quality of service (QoS) is still not guaranteed in the IP networks. Thus, it is necessary to deal with the audible artifacts caused by packet losses. To overcome the packet loss problem, most speech coding standard have their own embedded packet loss concealment (PLC) algorithms which adapt extrapolation methods utilizing the dependency on adjacent frames. Since many low bit rate CELP coders use predictive schemes for increasing coding efficiency, however, error propagation occurs even if single packet is lost. In this paper, we propose an efficient PLC algorithm with consideration about the speech characteristics of lost frames. To design an efficient PLC algorithm, we perform several experiments on investigating the error propagation effect of lost frames of a predictive coder. And then, we summarize the impact of packet loss to the speech characteristics and analyze the importance of the encoded parameters depending on each speech classes. From the result of the experiments, we propose a new PLC algorithm that mainly focuses on reducing the error propagation time. Experimental results show that the performance is much higher than conventional extrapolation methods over various frame erasure rate (FER) conditions. Especially the difference is remarkable in high FER condition.

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  Cite this article

[IEEE Style]

S. Youn, H. Kang, D. Youn, "Packet Loss Concealment Algorithm Based on Speech Characteristics," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 7, pp. 691-699, 2006. DOI: .

[ACM Style]

Sung-Wan Youn, Hong-Goo Kang, and Dae-Hee Youn. 2006. Packet Loss Concealment Algorithm Based on Speech Characteristics. The Journal of Korean Institute of Communications and Information Sciences, 31, 7, (2006), 691-699. DOI: .

[KICS Style]

Sung-Wan Youn, Hong-Goo Kang, Dae-Hee Youn, "Packet Loss Concealment Algorithm Based on Speech Characteristics," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 7, pp. 691-699, 7. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880