发明名称 |
Estimation method and apparatus of overall conversational speech quality |
摘要 |
The delay time and listening quality of a system under test are measured from a signal received therefrom, then the measured delay time and listening quality are transformed to a delay-related degradation and a listening quality degradation on the same quality measure, then the quantity of interaction between the delay-related degradation and the listening quality degradation is calculated, and the delay-related degradation, the listening quality degradation and the quantity of interaction are added together to obtain an overall degradation. The overall degradation is transformed to a subj ective evaluation value to estimate the overall speech quality. <IMAGE>
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申请公布号 |
EP1434197(A1) |
申请公布日期 |
2004.06.30 |
申请号 |
EP20030029657 |
申请日期 |
2003.12.23 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
TAKAHASHI, AKIRA;OKAMOTO, JUN;KAWAGUTI, GINGA |
分类号 |
G10L25/69;(IPC1-7):G10L19/00 |
主分类号 |
G10L25/69 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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