Downmixer and Method of Downmixing
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsFranz REUTELHUBER, Bernd EDLER, Eleni FOTOPOULOU, Markus MULTRUS, Pallavi MABEN, Sascha DISCH
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Abstract
A downmixer for downmixing a multi-channel signal having at least two channels, includes: a weighting value estimator for estimating band-wise weighting values for the at least two channels; a spectral weighter for weighting spectral domain representations of the at least two channels using the band-wise weighting values; a converter for converting weighted spectral domain representations of the at least two channels into time representations of the at least two channels; and a mixer for mixing the time representations of the at least two channels to obtain a downmix signal.
Claims26
A downmixer for downmixing a multi-channel signal having at least two channels, comprising:
- a weighting value estimator configured for estimating band-wise weighting values for the at least two channels, wherein the at least two channels are audio channels, and wherein the multi-channel signal is a multichannel audio signal;
- a spectral weighter configured for weighting spectral domain representations of the at least two channels using the band-wise weighting values;
- a converter configured for converting weighted spectral domain representations of the at least two channels into time representations of the at least two channels;
- and
- a mixer configured for mixing the time representations of the at least two channels to acquire a downmix signal.
A downmixer for downmixing a multi-channel signal comprising at least two channels, comprising:
- a weighting value estimator configured for estimating band-wise weighting values for the at least two channels, wherein the weighting value estimator is configured to calculate the band-wise weighting values based on a target energy value per band, so that an energy in the band of a downmix signal is in a predetermined relation to energies in the same bands of the at least two channels, wherein the at least two channels are audio channels, and wherein the multi-channel signal is a multichannel audio signal;
- a spectral weighter configured for weighting spectral domain representations of the at least two channels using the band-wise weighting values to acquire weighted spectral domain representations;
- and
- a mixer configured for calculating the downmix signal using the weighted spectral domain representations of the at least two channels.
A method for downmixing a multi-channel signal comprising at least two channels, comprising:
- estimating band-wise weighting values for the at least two channels, wherein the at least two channels are audio channels, and wherein the multi-channel signal is a multichannel audio signal;
- weighting spectral domain representations of the at least two channels using the band-wise weighting values;
- converting weighted spectral domain representations of the at least two channels into time representations of the at least two channels;
- and
- mixing the time representations of the at least two channels to acquire a downmix signal.
A method of downmixing a multi-channel signal comprising at least two channels, comprising:
- estimating band-wise weighting values for the at least two channels, comprising calculating the band-wise weighting values based on a target energy value per band, so that an energy in the band of a downmix signal is in a predetermined relation to energies in the same bands of the at least two channels, wherein the at least two channels are audio channels, and wherein the multi-channel signal is a multichannel audio signal;
- weighting spectral domain representations of the at least two channels using the band-wise weighting values to acquire weighted spectral domain representations;
- and
- calculating the downmix signal using the weighted spectral domain representations of the at least two channels.
A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, a method for downmixing a multi-channel signal comprising at least two channels, the method comprising:
- estimating band-wise weighting values for the at least two channels;
- weighting spectral domain representations of the at least two channels using the band-wise weighting values;
- converting weighted spectral domain representations of the at least two channels into time representations of the at least two channels;
- and
- mixing the time representations of the at least two channels to acquire a downmix signal.
A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, a method of downmixing a multi-channel signal comprising at least two channels, the method comprising:
- estimating band-wise weighting values for the at least two channels, comprising calculating the band-wise weighting values based on a target energy value per band, so that an energy in the band of a downmix signal is in a predetermined relation to energies in the same bands of the at least two channels;
- weighting spectral domain representations of the at least two channels using the band-wise weighting values to acquire weighted spectral domain representations;
- and
- calculating the downmix signal using the weighted spectral domain representations of the at least two channels.
Dependencies are inferred from the claim text.