| 摘要 |
An apparatus ( 1240 ), method, and computer program to assess VoIP speech quality ( 130 ) using access to degraded signals is provided. Different types of impairment ( 110 ) have different effect on speech quality. Preferred embodiments address up to four different types of impairment that affect VoIP signal quality: packet loss ( 230 ), speech clipping in time ( 850 ), noise ( 1400 ) and echo. An overall assessment algorithm factors in degradation due to various impairment factors to generate an overall speech quality assessment score or value.
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