Device and method for a bandwidth extension of an audio signal

BNRE20250004BUndetermined Publication Date: 2025-03-31FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV
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Patent Information

Application Number
BNRE20250004
Authority / Receiving Office
BN · BN
Patent Type
Patents
Current Assignee / Owner
Priority Date
2008-03-26
Filing Date
2025-01-15
Publication Date
2025-03-31
Estimated Expiration
2045-01-15

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Abstract

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a demicator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.
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