Device and method for characterizing a tone signal

US7273978B2 · kind B2 · utility

Assignee

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

Inventor

• Christian Uhle · Nuremberg, DE

Key dates

• Filing date: May 5, 2005
• Grant date: Sep 25, 2007
• Expiry date: Nov 18, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G10H2210/071
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

For characterizing a tone signal a sequence of quantized entry times for each of at least two tone sources over time is provided on the basis of a quantization raster. Hereupon, a common period length underlying the at least two tone sources is determined using the sequences of entry times. Hereupon, the sequence of entry times is divided into respective sub-sequences, wherein a length of a sub-sequence is equal to the common period length. Finally, the sub-sequences for the first tone source are combined into a first combined sub-sequence and for the second tone source into a second combined sub-sequence, i.e. for example using a pattern histogram, in order to characterize the tone signal by the first combined sub-sequence and by the second combined sub-sequence, e.g. with regard to rhythm, speed or genre.