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학술대회 A Forward-Backward Voice Packet Loss Concealment Algorithm for Multimedia over IP Network Services
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이미숙, 김홍국, 최승호, 이응돈, 김도영
Pacific-Rim Conference on Multimedia (PCM) 2004 (LNCS 3332), v.3332, pp.381-388
04MT2300, 차세대 고품질 VoIP 핵심 원천기술, 김도영
In this paper, we propose a voice packet loss concealment algorithm in order to improve voice quality for both multimedia over IP and voice over IP services. The proposed algorithm estimates the coding parameters of lost frames by combining forward and backward prediction from the good frames before and after the lost frames. The performance of the proposed algorithm is evaluated on the ITU-T G.729 coder, and it is compared with the performance of the conventional algorithms in terms of objective and subjective quality measures. From the PESQ score comparison and the listening test, it is found that the proposed algorithm provides better voice quality than the conventional ones. © Springer-Verlag Berlin Heidelberg 2004.
KSP 제안 키워드
Forward and Backward, IP networks, ITU-T G.729, Multimedia over IP, Network service, PESQ score, Quality measure, Subjective quality, Transmission gate(TG), Voice quality, Voice-over-IP(VoIP)