Concept for encoding an audio signal and decoding an audio signal using deterministic and noise like information

US10304470B2 · kind B2 · utility

Assignee

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

Inventors

• Guillaume Fuchs · Erlangen, DE
• Markus Multrus · Nuremberg, DE
• Emmanuel Ravelli · Erlangen, DE
• Markus Schnell · Nuremberg, DE

Key dates

• Filing date: Apr 18, 2016
• Grant date: May 28, 2019
• Expiry date: May 4, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L2025/932
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An encoder for encoding an audio signal has: an analyzer configured for deriving prediction coefficients and a residual signal from an unvoiced frame of the audio signal; a gain parameter calculator configured for calculating a first gain parameter information for defining a first excitation signal related to a deterministic codebook and for calculating a second gain parameter information for defining a second excitation signal related to a noise-like signal for the unvoiced frame; and a bitstream former configured for forming an output signal based on an information related to a voiced signal frame, the first gain parameter information and the second gain parameter information.