Selection of tonal components in an audio spectrum for...

Details Selection of tonal components in an audio spectrum for... Selection of tonal components in an audio spectrum for...

2011-03-22

2011-03-22

Fletcher, Marlon T (Department: 2832)

Music

Instruments

Electrical musical tone generation

C084S613000, C084S615000, C084S616000, C084S649000, C084S653000, C084S654000

Reexamination Certificate

active

07910819

ABSTRACT:
An audio signal is processed to extract key information by selecting (102) tonal components from the audio signal. A mask is then applied (104) to the selected tonal components to discard at least one tonal component. Note values of the remaining tonal components are determined (106) and mapped (108) to a single octave to obtain chroma values. The chroma values are accumulated (110) into a chromagram and evaluated (112).

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patent: 2005122136 (2005-12-01), None
Steffen Pauws; “Musical Key Extraction From Audio”, Proc. of the 5th International Conference on Music Information Retrieval, Barcelona, 2004, pp. 1-4, XP002447154.
Harte et al; “Automatic Chord Indentification Using a Quantised Chromagram”, Paper 6412 118th Audio Engineering Society Convention, Barcelona, Spain, May 2005.
M. DeSainte-Catherine et al; “High-Precision Fourier Analysis of Sounds Using Signal Derivatives”, J. Audio Eng. Soc., vol. 48, No. 7/8, pp. 654-667, Jul./Aug. 2000.

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