Encoding by reconstructing phase information using a structure tensor on audio spectrograms
AssigneeFraunhofer-Gesellschaft Zur Forderung Der
InventorsAndreas Niedermeier, Richard Füg, Sascha Disch
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Abstract
An apparatus for phase reconstruction from a magnitude spectrogram of an audio signal is provided. The apparatus includes a frequency change determiner being configured to determine a change of a frequency for each time-frequency bin of a plurality of time-frequency bins of the magnitude spectrogram of the audio signal depending on the magnitude spectrogram of the audio signal, and a phase reconstructor being configured to generate phase values for the plurality of time-frequency bins depending on the changes of the frequencies determined for the plurality of the time-frequency bins.
Claims21
An apparatus for phase reconstruction from a magnitude spectrogram of an audio signal, comprising:
- a frequency change determiner being configured to determine a change of a frequency for each time-frequency bin of a plurality of time-frequency bins of the magnitude spectrogram of the audio signal depending on the magnitude spectrogram of the audio signal, and
- a phase reconstructor being configured to generate phase values for the plurality of time-frequency bins depending on the changes of the frequencies determined for the plurality of the time-frequency bins.
A method for phase reconstruction from a magnitude spectrogram of an audio signal, comprising:
- determining a change of a frequency for each time-frequency bin of a plurality of time-frequency bins of the magnitude spectrogram of the audio signal depending on the magnitude spectrogram of the audio signal, and
- generating phase values for the plurality of time-frequency bins depending on the changes of the frequencies determined for the plurality of the time-frequency bins.
A non-transitory digital storage medium having a computer program stored thereon to perform the method for phase reconstruction from a magnitude spectrogram of an audio signal, comprising:
- determining a change of a frequency for each time-frequency bin of a plurality of time-frequency bins of the magnitude spectrogram of the audio signal depending on the magnitude spectrogram of the audio signal, and
- generating phase values for the plurality of time-frequency bins depending on the changes of the frequencies determined for the plurality of the time-frequency bins,
- when said computer program is run by a computer.
Dependencies are inferred from the claim text.