Patent · US Expired

Method and device for characterizing a signal and method and device for producing an indexed signal

US7478045B2 · kind B2 · utility

9Cited by

11References

22Claims

0Family size

Assignee

M2ANY GmbH · DE

Inventors

Eric A. Allamanche · Nuremberg, DE
Jürgen Herre · Buckenhof, DE
Oliver Hellmuth · Erlangen, DE
Thorsten Kastner · Kronach, DE

Key dates

Filing date	Jul 15, 2002
Grant date	Jan 13, 2009
Priority date	—
Expiry date	Nov 14, 2024

Classification

Technology area (CPC G)Physics
CPC primaryG10H2250/601
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In a method for characterizing a signal representing an audio content a measure is determined for a tonality of the signal, whereupon a statement is made about the audio content of the signal on the basis of the measure for the tonality of the signal. The measure for the tonality is derived from a quotient whose numerator is the mean of the summed values of spectral components of the signal exponentiated with a first power and whose denominator is the mean of the summed values of spectral components exponentiated with a second power, the first and second powers differing from each other. The measure for the tonality of the signal for the content analysis is robust in relation to a signal distortion, due e.g. to MP3 coding, and has a high correlation with the content of the analyzed signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.