发明名称 |
QUALITY ESTIMATION METHOD AND QUALITY ESTIMATION APPARATUS IN TWO-WAY COMMUNICATION SERVICE SYSTEM |
摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately estimate comprehensive quality in two-way communication service using a voice and a video medium. <P>SOLUTION: As factors responsible for a deterioration in quality in the two-way communication service between terminals, the following are monitored: a video bit rate Br; a frame rate Fr; a video invalid packet rate Pv; a voice invalid packet rate Pa; and a delay time D. On the basis of the factors responsible for the deterioration in quality, estimation is made to a factor score S1 for an aesthetic feeling and a factor score S2 for an uplifting feeling as mental factors with respect to quality received by a user. An evaluation value MOS for the general quality is obtained by substituting the estimated factor score S1 for the aesthetic feeling and factor score S2 for the uplifting feeling for an expression using A, B, C as constants: MOS=A×S1+B×S2+C. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
申请公布号 |
JP2006074333(A) |
申请公布日期 |
2006.03.16 |
申请号 |
JP20040254061 |
申请日期 |
2004.09.01 |
申请人 |
NIPPON TELEGR & TELEPH CORP <NTT> |
发明人 |
YAMAGISHI KAZUHISA;HAYASHI TAKANORI |
分类号 |
H04N17/00;H04L12/70;H04L12/801;H04L12/911 |
主分类号 |
H04N17/00 |
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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