Invention Grant
- Patent Title: Concept for encoding an audio signal and decoding an audio signal using speech related spectral shaping information
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Application No.: US15131681Application Date: 2016-04-18
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Publication No.: US10373625B2Publication Date: 2019-08-06
- Inventor: Guillaume Fuchs , Markus Multrus , Emmanuel Ravelli , Markus Schnell
- Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Applicant Address: DE Munich
- Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Current Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Current Assignee Address: DE Munich
- Agency: Perkins Coie LLP
- Agent Michael A. Glenn
- Priority: EP13189392 20131018; EP14178788 20140728
- Main IPC: G10L19/06
- IPC: G10L19/06 ; G10L19/07 ; G10L19/12 ; G10L19/083 ; G10L19/20 ; G10L19/032 ; G10L25/93
Abstract:
According to an aspect of the present invention an encoder for encoding an audio signal has an analyzer configured for deriving prediction coefficients and a residual signal from a frame of the audio signal. The encoder has a formant information calculator configured for calculating a speech related spectral shaping information from the prediction coefficients, a gain parameter calculator configured for calculating a gain parameter from an unvoiced residual signal and the spectral shaping information and a bitstream former configured for forming an output signal based on an information related to a voiced signal frame, the gain parameter or a quantized gain parameter and the prediction coefficients.
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