Audio decoder and method for providing a decoded audio information using an error concealment based on a time domain excitation signal
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsJérémie Lecomte, Goran Markovic, Michael Schnabel, Grzegorz Pietrzyk
Life of this patent
Estimating the term…
Abstract
An audio decoder for providing a decoded audio information on the basis of an encoded audio information includes an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame following an audio frame encoded in a frequency domain representation using a time domain excitation signal.
Claims33
A method for providing a decoded audio information on the basis of an encoded audio information, the method comprising:
- providing an error concealment audio information for concealing a loss of an audio frame following an audio frame encoded in a frequency domain representation using a time domain excitation signal;
- wherein the method comprises combining an extrapolated time domain excitation signal and a noise signal, in order to acquire an input signal for an LPC synthesis, and
- wherein the method comprises performing the LPC synthesis,
- wherein the LPC synthesis filters the input signal of the LPC synthesis in dependence on linear-prediction-coding parameters, in order to acquire the error concealment audio information;
- wherein the method comprises high-pass filtering the noise signal which is combined with the extrapolated time domain excitation signal.
An audio decoder for providing a decoded audio information on the basis of an encoded audio information, the audio decoder comprising:
- a frequency domain decoder core;
- and
- an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame following an audio frame encoded in a frequency domain representation using a time domain excitation signal;
- wherein the error concealment unitcombines an extrapolated time domain excitation signal and a noise signal, in order to acquire an input signal for an LPC synthesis, and
- wherein the error concealment unitperforms the LPC synthesis,
- wherein the LPC synthesis filters the input signal of the LPC synthesis in dependence on linear-prediction-coding parameters, in order to acquire the error concealment audio information;
- wherein the error concealment unithigh-pass filters the noise signal which is combined with the extrapolated time domain excitation signal.
An audio decoder for providing a decoded audio information on the basis of an encoded audio information, the audio decoder comprising:
- an error concealment unit to provide an error concealment audio information for concealing a loss of an audio frame following an audio frame encoded in a frequency domain representation using a time domain excitation signal;
- wherein the error concealment unit combines an extrapolated time domain excitation signal and a noise signal, in order to acquire an input signal for an LPC synthesis, and
- wherein the error concealment unitperforms the LPC synthesis,
- wherein the LPC synthesis filters the input signal of the LPC synthesis in dependence on linear-prediction-coding parameters, in order to acquire the error concealment audio information;
- wherein the error concealment unithigh-pas filters the noise signal which is combined with the extrapolated time domain excitation signal.
Dependencies are inferred from the claim text.