Time-warping and re-phasing in packet loss concealment

Zopf, Robert; Thyssen, J.; Chen, Juin-Hwey

doi:10.21437/interspeech.2007-472

Interspeech 2007 2007

DOI: 10.21437/interspeech.2007-472

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Time-warping and re-phasing in packet loss concealment

Robert Zopf¹,

J. Thyssen²,

Juin-Hwey Chen³

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2009

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Packet loss concealment based on extrapolation of speech waveform

Chen

2009

2009 IEEE International Conference on Acoustics, Speech and Signal Processing

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A class of packet loss concealment algorithms for speech coding is presented. It generates the replacement waveform for the lost frame by direct extrapolation of the past speech waveform, with or without look-ahead. The ITU-T G.722 Appendix III standard is based on it. When a future frame is unavailable (without lookahead), the PLC algorithm gives significantly better speech quality than G.711 Appendix I -by about 0.2 PESQ for high packet loss rates.When a future frame is available (with look-ahead), the PLC algorithm uses the decoded speech waveform in the future frame to guide the pitch contour of waveform extrapolation during the lost frame such that the extrapolated waveform is phasealigned with the decoded waveform after the packet loss. This technique further improved PESQ by another 0.2 for high packet loss rates.

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Packet loss concealment based on extrapolation of speech waveform

Chen

2009

2009 IEEE International Conference on Acoustics, Speech and Signal Processing

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Time-warping and re-phasing in packet loss concealment

Cited by 1 publication

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Packet loss concealment based on extrapolation of speech waveform

Packet loss concealment based on extrapolation of speech waveform

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