TY - GEN
T1 - Subjective evaluation of packet loss recovery techniques for voice over IP
AU - Okamoto, Masahito
AU - Nose, Takashi
AU - Ito, Akinori
AU - Nagano, Takeshi
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2015/1/13
Y1 - 2015/1/13
N2 - We conducted a subjective evaluation experiment for VoIP speech under severe packet loss condition. The target codec was G.729, and four packet loss concealment methods were tested: parameter redundancy, SVM-based parameter redundancy, N-gram-based parameter estimation and interleaving. We first evaluated the effect of the interleaving block length on the subjective delay and speech quality. As a result, we found that the interleaving improved the subjective speech quality, but longer block length did not improve the quality. Next, we investigated the effect of PLC methods on the subjective latency and quality, and we found interleaving and simple PLC method gave the best result. N-gram-based PLC method made the quality worse.
AB - We conducted a subjective evaluation experiment for VoIP speech under severe packet loss condition. The target codec was G.729, and four packet loss concealment methods were tested: parameter redundancy, SVM-based parameter redundancy, N-gram-based parameter estimation and interleaving. We first evaluated the effect of the interleaving block length on the subjective delay and speech quality. As a result, we found that the interleaving improved the subjective speech quality, but longer block length did not improve the quality. Next, we investigated the effect of PLC methods on the subjective latency and quality, and we found interleaving and simple PLC method gave the best result. N-gram-based PLC method made the quality worse.
KW - Packet loss
KW - Packet loss concealment
KW - Subjective evaluation
KW - VoIP
UR - http://www.scopus.com/inward/record.url?scp=84922496339&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84922496339&partnerID=8YFLogxK
U2 - 10.1109/ICALIP.2014.7009887
DO - 10.1109/ICALIP.2014.7009887
M3 - Conference contribution
AN - SCOPUS:84922496339
T3 - ICALIP 2014 - 2014 International Conference on Audio, Language and Image Processing, Proceedings
SP - 711
EP - 714
BT - ICALIP 2014 - 2014 International Conference on Audio, Language and Image Processing, Proceedings
A2 - Wan, Wanggen
A2 - Luo, Fa-Long
A2 - Yu, Xiaoqing
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 4th International Conference on Audio, Language and Image Processing, ICALIP 2014
Y2 - 7 July 2014 through 9 July 2014
ER -