Patent · US Active

Device and method for analyzing an information signal

US7565213B2 · kind B2 · utility

10Cited by

33References

24Claims

0Family size

Assignee

GRACENOTE, INC. · US

Inventors

Christian Dittmar · Ilmenau, DE
Christian Uhle · Nuremberg, DE
Jürgen Herre · Buckenhof, DE

Key dates

Filing date	May 5, 2005
Grant date	Jul 21, 2009
Priority date	—
Expiry date	May 3, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG10L25/48
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A significant short-time spectrum is extracted from an information signal, the means for extracting being configured to extract such short-time spectra which come closer to a specific characteristic than others. The short-time spectra extracted are then decomposed into component signals using ICA analysis, a component signal spectrum representing a profile spectrum of a tone source which generates a tone corresponding to the characteristic sought. From a sequence of short-time spectra of the information signal and from the profile spectra determined, an amplitude envelope is calculated for each profile spectrum to indicate how a tone source profile spectrum changes over time. The profile spectra and all the amplitude envelopes associated therewith provide a description of the information signal which may be evaluated further, for example for transcription purposes in the case of a music signal.

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