Method and device for detecting a transient in a discrete-time audiosignal

US6453282B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Johannes Hilpert · Nuremberg, DE
• Jürgen Herre · Buckenhof, DE
• Bernhard Grill · Lautenbächle, DE
• Rainer Buchta · Herzogenaurach, DE
• Karlheinz Brandenburg · Erlangen, DE
• Heinz Gerhauser · Waischenfeld, DE

Key dates

• Filing date: Nov 24, 1999
• Grant date: Sep 17, 2002
• Expiry date: Nov 24, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/665
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method for detecting a transient in a discrete-time audio signal is performed completely in the time domain and includes the step of segmenting the discrete-time audio signal as to generate consecutive segments of the same length with unfiltered discrete-time audio signals. The discrete-time audio signal in a current segment is filtered. Either the energy of the filtered discrete-time audio signal in the current segment is compared with the energy of the filtered discrete-time audio signal in a preceding segment or a current relationship between the energy of the filtered discrete-time audio signal in the current segment and the energy of the unfiltered discrete-time audio signal in the current segment is formed and this current relationship compared with a preceding corresponding relationship. Whether a transient is present in the discrete-time audio signal is detected using one and/or the other of these comparisons.