Apparatus and method for improving speech intelligibility in background noise by amplification and compression

US10319394B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Jan Rennies · Oldenburg, DE
• Henning Schepker · Oldenburg, DE
• Simon Doclo · Oldenburg, DE
• Jens-Ekkehart APPELL · Wardenburg, DE

Key dates

• Filing date: Jul 8, 2015
• Grant date: Jun 11, 2019
• Expiry date: Jul 8, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L21/0316
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating a modified speech signal from a speech input signal which has a plurality of speech subband signals, the modified speech signal having a plurality of modified subband signals is provided, having: a weighting information generator for generating weighting information for each speech subband signal depending on a signal power of said speech subband signal, and a signal modifier for modifying each speech subband signal by applying the weighting information on said speech subband signal to obtain a modified subband signal. The weighting information generator is configured to generate the weighting information for each of the plurality of speech subband signals, wherein the signal modifier is configured to modify each of the speech subband signals so that a first speech subband signal having a first signal power is amplified with a first degree, and so that a second speech subband signal having a second signal power is amplified with a second degree, the first signal power being greater than the second signal power, and the first degree being lower than the second degree.