Presentation 2002/7/4
A Concealment Technique for the Packet Loss in VoIP Based on Waveform Substitution
Noriko KOMAKI, Naofumi AOKI, Tsuyoshi YAMAMOTO,
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Abstract(in English) Speech quality of VoIP is degraded by transmission errors such as packet loss that is inevitable in best-effort communications. We have studied how to decrease such degradation. This study investigated PWR (Pitch Waveform Replication) method that is employed as an error hiding technique. The previous version of PWR employs an interpolation where past speech data is only used. For the decrease of some artifacts such as echoic quality in the begging and end of phonation, this study has proposed a new version that takes account of an interpolation from future speech data. In order to shorten the delay of the pitch extraction from future speech data, the proposed method employs a template matching. From the experimental results of objective and subjective evaluation, it is indicated that the proposed method is potentially useful for the improvement of speech quality.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) VoIP / packet loss / waveform substitution method / pitch waveform replication method
Paper # CQ2002-59
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Committee CQ
Conference Date 2002/7/4(1days)
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Registration To Communication Quality (CQ)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Concealment Technique for the Packet Loss in VoIP Based on Waveform Substitution
Sub Title (in English)
Keyword(1) VoIP
Keyword(2) packet loss
Keyword(3) waveform substitution method
Keyword(4) pitch waveform replication method
1st Author's Name Noriko KOMAKI
1st Author's Affiliation Graduate School of Engineering, Hokkaido University()
2nd Author's Name Naofumi AOKI
2nd Author's Affiliation Graduate School of Engineering, Hokkaido University
3rd Author's Name Tsuyoshi YAMAMOTO
3rd Author's Affiliation Graduate School of Engineering, Hokkaido University
Date 2002/7/4
Paper # CQ2002-59
Volume (vol) vol.102
Number (no) 190
Page pp.pp.-
#Pages 6
Date of Issue