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US 8,805,697 B2Granted
Decomposition of music signals using basis functions with time-evolution information
AssigneeQUALCOMM Incorporated
InventorsErik Visser, Yinyi Guo, Mofei Zhu, Sang-Uk Ryu, Lae-Hoon Kim, Jongwon Shin
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Abstract
Decomposition of a multi-source signal using a basis function inventory and a sparse recovery technique is disclosed.
Claims43
A method of decomposing an audio signal, said method comprising:
- for each of a plurality of segments in time of the audio signal, calculating a corresponding signal representation over a range of frequencies;
- and
- based on the plurality of calculated signal representations and on a plurality of basis functions, calculating a vector of activation coefficients,
- wherein each activation coefficient of the vector corresponds to a different basis function of the plurality of basis functions, and
- wherein each of the plurality of basis functions comprises a first corresponding signal representation over the range of frequencies and a second corresponding signal representation over the range of frequencies that is different than said first corresponding signal representation.
2 more elements
An apparatus for decomposing an audio signal, said apparatus comprising:
- means for calculating, for each of a plurality of segments in time of the audio signal, a corresponding signal representation over a range of frequencies;
- and
- means for calculating a vector of activation coefficients, based on the plurality of calculated signal representations and on a plurality of basis functions,
- wherein each activation coefficient of the vector corresponds to a different basis function of the plurality of basis functions, and
- wherein each of the plurality of basis functions comprises a first corresponding signal representation over the range of frequencies and a second corresponding signal representation over the range of frequencies that is different than said first corresponding signal representation.
2 more elements
An apparatus for decomposing an audio signal, said apparatus comprising:
- a transform module configured to calculate, for each of a plurality of segments in time of the audio signal, a corresponding signal representation over a range of frequencies;
- and
- a coefficient vector calculator configured to calculate a vector of activation coefficients, based on the plurality of calculated signal representations and on a plurality of basis functions,
- wherein each activation coefficient of the vector corresponds to a different basis function of the plurality of basis functions, and
- wherein each of the plurality of basis functions comprises a first corresponding signal representation over the range of frequencies and a second corresponding signal representation over the range of frequencies that is different than said first corresponding signal representation.
2 more elements
A non-transitory machine-readable storage medium comprising tangible features that when read by a machine cause the machine to:
- calculate, for each of a plurality of segments in time of the audio signal, a corresponding signal representation over a range of frequencies;
- and
- calculate a vector of activation coefficients, based on the plurality of calculated signal representations and on a plurality of basis functions,
- wherein each activation coefficient of the vector corresponds to a different basis function of the plurality of basis functions, and
- wherein each of the plurality of basis functions comprises a first corresponding signal representation over the range of frequencies and a second corresponding signal representation over the range of frequencies that is different than said first corresponding signal representation.
2 more elements
Dependencies are inferred from the claim text.