| 发明名称 |
Extraction of external noise components |
| 摘要 |
<p>A first band analyzer (21) divides an acoustic signal input from a sound playback system via an input unit into frequency bands, and outputs a first band level. An acoustic signal estimator (22) estimates the band level of the original acoustic signal at the input unit, and outputs a second band level for each band. A processor (23) extracts an external noise component which is contained in the acoustic signal using the first band level and the second band level. The external noise can be accurately estimated with less computation.</p> |
| 申请公布号 |
EP1376541(A2) |
申请公布日期 |
2004.01.02 |
| 申请号 |
EP20030253100 |
申请日期 |
2003.05.17 |
| 申请人 |
ALPINE ELECTRONICS, INC. |
发明人 |
ISE, TOMOHIKO;SAITO, NOZOMU |
| 分类号 |
H04R3/00;G10L21/02;H04B15/00;H04R3/04;(IPC1-7):G10L21/02 |
主分类号 |
H04R3/00 |
| 代理机构 |
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代理人 |
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