Device and method for a bandwidth extension of an audio signal

BNRE20250032BUndetermined Publication Date: 2009-10-20FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV

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Patent Information

Application Number: BNRE20250032
Authority / Receiving Office: BN · BN
Patent Type: Patents
Current Assignee / Owner
Priority Date: 2008-01-31
Filing Date: 2025-10-25
Publication Date: 2009-10-20
Estimated Expiration: 2045-10-25

Application Information

Patent Timeline

31 Jan 2008

Priority

25 Oct 2025

Application

BNRE20250032

20 Oct 2009

Publication

BNRE20250032B

IPC: G10L

Inventors: NAGEL FREDERIK; DISCH SASCHA

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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 decimator 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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