Device and method for analyzing an information signal
First Claim
1. A device for analyzing an information signal, wherein the information signal is an audio signal consisting of a superposition of partial signals, wherein the partial signals originate from individual sources together forming the audio signal, wherein the device includes:
- a unit for decomposing the information signal into several component signals;
a unit for calculating a feature for each individual component signal, wherein the feature is defined so that it is correlated with one source characteristic for one subspace and with another source characteristic for another subspace, wherein one or more individual sources are associated with each subspace, and wherein the one or more individual sources associated with the one subspace differ from the one or more individual sources associated with the other subspace; and
a unit for associating the component signals with at least two subspaces on the basis of the features for the component signals, so that the one subspace includes component signals corresponding to the one or more individual sources associated with the one subspace, and that the other subspace includes component signals corresponding to the one or more individual sources associated with the other subspace.
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Abstract
For analyzing an information signal consisting of a superposition of partial signals, wherein a partial signal originates from an individual source, the information signal is first decomposed into several component signals. Then one or more features are calculated for each component signal, wherein the feature(s) is/are defined so that it/they provide(s) a statement on an information content of the component signal. Finally, an association of the component signals with at least two subspaces is performed on the basis of the features calculated for the component signals. By feature extraction on the component signal level, an efficient subspace decomposition which is meaningful with respect to a present audio scene is achieved.
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Citations
28 Claims
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1. A device for analyzing an information signal, wherein the information signal is an audio signal consisting of a superposition of partial signals, wherein the partial signals originate from individual sources together forming the audio signal, wherein the device includes:
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a unit for decomposing the information signal into several component signals;
a unit for calculating a feature for each individual component signal, wherein the feature is defined so that it is correlated with one source characteristic for one subspace and with another source characteristic for another subspace, wherein one or more individual sources are associated with each subspace, and wherein the one or more individual sources associated with the one subspace differ from the one or more individual sources associated with the other subspace; and
a unit for associating the component signals with at least two subspaces on the basis of the features for the component signals, so that the one subspace includes component signals corresponding to the one or more individual sources associated with the one subspace, and that the other subspace includes component signals corresponding to the one or more individual sources associated with the other subspace. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for analyzing an information signal, wherein the information signal is an audio signal consisting of a superposition of partial signals, wherein the partial signals originate from individual sources together forming the audio signal, the method comprising:
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decomposing the information signal into several component signals;
calculating a feature for each individual component signal, wherein the feature is defined so that it is correlated with one source characteristic for one subspace and with another source characteristic for another subspace, wherein one or more individual sources are associated with each subspace, and wherein the one or more individual sources associated with the one subspace differ from the one or more individual sources associated with the other subspace; and
associating the component signals with at least two subspaces on the basis of the features for the component signals, so that the one subspace includes component signals corresponding to the one or more individual sources associated with the one subspace, and that the other subspace includes component signals corresponding to the one or more individual sources associated with the other subspace.
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28. A computer program with a program code for performing a method for analyzing an information signal, when the program runs on a computer, wherein the information signal is an audio signal consisting of a superposition of partial signals, wherein the partial signals originate from individual sources together forming the audio signal, the method comprising the steps of decomposing the information signal into several component signals;
- calculating a feature for each individual component signal, wherein the feature is defined so that it is correlated with one source characteristic for one subspace and with another source characteristic for another subspace, wherein one or more individual sources are associated with each subspace, and wherein the one or more individual sources associated with the one subspace differ from the one or more individual sources associated with the other subspace; and
associating the component signals with at least two subspaces on the basis of the features for the component signals, so that the one subspace includes component signals corresponding to the one or more individual sources associated with the one subspace, and that the other subspace includes component signals corresponding to the one or more individual sources associated with the other subspace.
- calculating a feature for each individual component signal, wherein the feature is defined so that it is correlated with one source characteristic for one subspace and with another source characteristic for another subspace, wherein one or more individual sources are associated with each subspace, and wherein the one or more individual sources associated with the one subspace differ from the one or more individual sources associated with the other subspace; and
Specification