Methods and apparatus to extract a pitch-independent timbre attribute from a media signal
AssigneeThe Nielsen Company (US), LLC
InventorZafar Rafii
Life of this patent
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Abstract
Methods and apparatus to extract a pitch-independent timbre attribute from a media signal are disclosed. An example apparatus includes an audio characteristic extractor to determine a logarithmic spectrum of an audio signal; transform the logarithmic spectrum of the audio signal into a frequency domain to generate a transform output; determine a magnitude of the transform output; and determine a timbre attribute of the audio signal based on an inverse transform of the magnitude.
Claims20
A non-transitory computer readable storage medium comprising instructions which, when executed cause one or more processors to at least:
- access a media signal;
- extract a pitch-independent timbre spectrum of the accessed media signal;
- and
- classify the accessed media signal based on data corresponding to the pitch-independent timbre spectrum, wherein the classification corresponds to at least one of an instrument or a genre.
A method comprising:
- accessing, by one or more processors, a media signal;
- extracting, by the one or more processors, a pitch-independent timbre spectrum of the accessed media signal;
- and
- classifying, by the one or more processors, the accessed media signal based on data corresponding to the pitch-independent timbre spectrum, wherein the classification corresponds to at least one of an instrument or a genre.
An apparatus comprising:
- an interface to receive a media signal;
- and
- one or more processors to at least:
- access the media signal;
- extract a pitch-independent timbre spectrum of the accessed media signal;
- and
- classify the accessed media signal based on data corresponding to the pitch-independent timbre spectrum, wherein the classification corresponds to at least one of an instrument or a genre.
Dependencies are inferred from the claim text.