发明名称 |
Time-scale modification of music signals based on polyphase filterbanks and constrained time-domain processing |
摘要 |
A time scale modification method employs separate bands obtained through an analysis polyphase filter bank with separate time-scale modification processing for the bands. The outputs are combined using a synthesis filter bank. Some constraints are imposed on the time-scale modification processing, such a limitation of the range of overlap adjustment values for bands other than the greatest energy band, to eliminate noise due to aliasing and inter-channel phase mismatch. This invention produces output quality considerably higher than conventional time-domain time-scale modification methods for general music signals with computational requirements comparable to those of conventional time-domain time-scale modification methods.
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申请公布号 |
US2005132870(A1) |
申请公布日期 |
2005.06.23 |
申请号 |
US20030739632 |
申请日期 |
2003.12.18 |
申请人 |
SAKURAI ATSUHIRO;TRAUTMANN STEVEN;ZELAZO DANIEL L. |
发明人 |
SAKURAI ATSUHIRO;TRAUTMANN STEVEN;ZELAZO DANIEL L. |
分类号 |
G10H1/12;G10H7/00;(IPC1-7):G10H7/00 |
主分类号 |
G10H1/12 |
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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