Presentation 2001/4/13
Delay Variation Metrics for Speech Quality Estimation of VoIP
Masataka MASUDA, Katsunori ORI,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) With increasing demands to integrate the voice and the data networks using VoIp (Voice over IP), techniques for evaluating the quality of VoIP are needed. In the conventional method of estimating speech quality of VoIP, the subjectivity quality (MOS) of the speech is estimated from the network quality. The method can estimate MOS based on the function of the playout buffer, the packet loss, and the delay variation of packets. However, the definition of the delay variation was not recommended by standardization organizations. In this paper, the delay variation metrics are generalized using the definition recommended by ITU-T and IETF, and the accuracy of the estimation method is verified. We show MOS estimated using the method with standerd metrics and our using the conventional method. We also show that the method with standerd metrics is more convenient than the conventional method.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) VoIP / MOS / Delay Variation Metrics / Playout Buffer / Invalid Packet / Subjective Quality
Paper # RCS2001-31,CQ2001-31
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Conference Information
Committee CQ
Conference Date 2001/4/13(1days)
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Paper Information
Registration To Communication Quality (CQ)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Delay Variation Metrics for Speech Quality Estimation of VoIP
Sub Title (in English)
Keyword(1) VoIP
Keyword(2) MOS
Keyword(3) Delay Variation Metrics
Keyword(4) Playout Buffer
Keyword(5) Invalid Packet
Keyword(6) Subjective Quality
1st Author's Name Masataka MASUDA
1st Author's Affiliation NTT Service Integration Laboratories()
2nd Author's Name Katsunori ORI
2nd Author's Affiliation NTT Service Integration Laboratories
Date 2001/4/13
Paper # RCS2001-31,CQ2001-31
Volume (vol) vol.101
Number (no) 13
Page pp.pp.-
#Pages 6
Date of Issue