Speech quality estimation of voice over internet protocol codec using a packet loss impairment model | Zendy

Min-Ki Lee | Zendy; Hong-Goo Kang | Zendy

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Speech quality estimation of voice over internet protocol codec using a packet loss impairment model

Author(s) -

Min-Ki Lee,

Hong-Goo Kang

Publication year - 2013

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4824628

Subject(s) - computer science , packet loss , codec , degradation (telecommunications) , encoder , mean opinion score , network packet , speech recognition , quality (philosophy) , psqm , speech coding , computer network , telecommunications , linear predictive coding , metric (unit) , operations management , philosophy , epistemology , economics , operating system

This letter proposes a degradation and cognition model to estimate speech quality impairment because of packet loss concealment (PLC) algorithm implemented in the speech CODEC SILK. By considering the fact that the quality degradation caused by packet loss is highly related to the PLC algorithm, the impact of quality degradation on various types of previous and lost packet classes is analyzed. Then, the PLC effects to the proposed class types are measured by the class conditional expectation of the degradation scores. Finally, the cognition module is derived to estimate the total quality degradation in a mean opinion score (MOS) scale. When assessed for correlation with subject test results, the correlation coefficient of the encoder-based class model is 0.93, and that of the decoder-based model is 0.87.

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