发明名称 |
SIGNAL DISTORTION ELIMINATION DEVICE, METHOD, PROGRAM, AND RECORDING MEDIUM CONTAINING THE PROGRAM |
摘要 |
<p>Provided is a signal distortion elimination apparatus comprising: an inverse filter application means that outputs the signal obtained by applying an inverse filter to an observed signal as a restored signal when a predetermined iteration termination condition is met and outputs the signal obtained by applying the inverse filter to the observed signal as an ad-hoc signal when the predetermined iteration termination condition is not met; a prediction error filter calculation means that segments the ad-hoc signal into frames and outputs a prediction error filter of each frame obtained by performing linear prediction analysis of the ad-hoc signal of each frame; an inverse filter calculation means that calculates an inverse filter such that a concatenation of innovation estimates of the respective frames becomes mutually independent among their samples, where the innovation estimate of a single frame (an innovation estimate) is the signal obtained by applying the prediction error filter of the corresponding frame to the ad-hoc signal of the corresponding frame, and outputs the inverse filter; and a control means that iteratively executes the inverse filter application means, the prediction error filter calculation means and the inverse filter calculation means until the iteration termination condition is met.</p> |
申请公布号 |
EP1883068(A1) |
申请公布日期 |
2008.01.30 |
申请号 |
EP20070714404 |
申请日期 |
2007.02.16 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
YOSHIOKA, TAKUYA;HIKICHI, TAKAFUMI;MIYOSHI, MASATO |
分类号 |
G10L21/02;H04R3/00 |
主分类号 |
G10L21/02 |
代理机构 |
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代理人 |
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地址 |
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