Methods and apparatus to extract a pitch-independent timbre attribute from a media signal
AssigneeThe Nielson 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
An apparatus comprising:
- 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.
A non-transitory computer readable storage medium comprising instructions which, when executed, cause a one or more processors to at least:
- 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.
An apparatus comprising:
- means for determining a timbre attribute of an audio signal, the means for determining to:
- determine a logarithmic spectrum of the 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 the timbre attribute of the audio signal based on an inverse transform of the magnitude.
Dependencies are inferred from the claim text.