Invention Publication
- Patent Title: VERFAHREN UND VORRICHTUNG ZUM ERFASSEN EINES ANSCHLAGS IN EINEM ZEITDISKRETEN AUDIOSIGNAL
- Patent Title (English): Method and device for detecting a transient in a discrete-time audiosignal, and device and method for coding an audiosignal
- Patent Title (中): 方法和装置用于记录攻击在时间离散音频信号
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Application No.: EP98937484.8Application Date: 1998-06-15
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Publication No.: EP1005695A2Publication Date: 2000-06-07
- Inventor: HILPERT, Johannes , HERRE, Jürgen , GRILL, Bernhard , BUCHTA, Rainer , BRANDENBURG, Karlheinz , GERHÄUSER, Heinz
- Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.
- Applicant Address: Leonrodstrasse 54 80636 München DE
- Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.
- Current Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.
- Current Assignee Address: Leonrodstrasse 54 80636 München DE
- Agency: Schoppe, Fritz, Dipl.-Ing.
- Priority: DE19736669 19970822
- International Announcement: WO9910886 19990304
- Main IPC: G11B20/00
- IPC: G11B20/00
Abstract:
The invention relates to a method for detecting a transient in a discrete-time audiosignal (x(k)) which is carried out entirely in the time domain. Said method comprises a step in which the discrete-time audiosignal is segmented so as generate consecutive segments of identical length with unfiltered discrete-time audiosignals (xs(T), xs(T-1), xs(T-2), ...), after which the discrete-time audiosignal (xs(T)) in a current segment is filtered. Thereafter there are two options: either the energy (Ef(T)) of the filtered discrete-time audiosignal (Ys(T)) in the current segment can be compared with the energy (Ef(T-1)) of the filtered discrete-time audiosignal (Ys(T-1)) in a preceding segment, or a current relationship can be generated between the energy (Ef(T)) of the filtered discrete-time audiosignal (Ys(T)) in the current segment and the energy (Eu(T)) of the unfiltered discrete-time audiosignal (Xs(T)) in the current segment and said current relationship compared with a corresponding preceding relationship. On the basis of the one comparison and/or the other comparison it is determined whether a transient is present in the discrete-time audiosignal.
Public/Granted literature
- EP1005695B1 VERFAHREN UND VORRICHTUNG ZUM ERFASSEN EINES ANSCHLAGS IN EINEM ZEITDISKRETEN AUDIOSIGNAL Public/Granted day:2001-07-11
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