发明名称 |
Estimation method and apparatus of overall conversational quality taking into account the interaction between quality factors |
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 subjective evaluation value to estimate the overall speech quality.
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申请公布号 |
US7499856(B2) |
申请公布日期 |
2009.03.03 |
申请号 |
US20030740642 |
申请日期 |
2003.12.22 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
TAKAHASHI AKIRA;OKAMOTO JUN;KAWAGUTI GINGA |
分类号 |
G10L21/00;G10L19/00;G10L25/69 |
主分类号 |
G10L21/00 |
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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