대한음성학회:학술대회논문집 (Proceedings of the KSPS conference)
- 대한음성학회 2003년도 10월 학술대회지
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- Pages.109-112
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- 2003
상태별 이득 제어 및 fixed codebook estimation을 이용한 G.729에서의 Packet Loss Concealment 알고리즘 개선
Improvement of Packet Loss Concealment Algorithm by Using state gain control and fixed codebook estimation
- 발행 : 2003.10.01
초록
In real time packetized voice applications, missing frames is a major source of voice quality degradation. Thus packet loss concealment(PLC) algorithms are needed to guarantee the QoS of the VoIP. Still current speech codecs for VoIP work poor when consecutive packet losses are issued. In this paper, we proposed a new PLC algorithm for the G.729 codec. Our algorithm works better especially when the consecutive packet loss occurs mainly because it adopts an adaptive gain controller utilizing the number of missing packet information combined with a fixed codebook vector estimation algorithm and LPC bandwidth expansion.
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