Granted Patent B2

US 12,658,193 · App. 17/001,722 · Granted Jun 16, 2026

Inventors: Sascha Dick (Nuremberg, DE); Christian Helmrich (Erlangen, DE); Johannes Hilpert (Nuremberg, DE); Andreas Hoelzer (Erlangen, DE)

Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V

G10L19/008G10L19/22H04S1/007H04S3/02G10L19/20H04S2400/03H04S2420/07

Abstract

Claims (26)

1 . A multi-channel audio decoder for providing at least two output audio signals on the basis of an encoded representation,

wherein the multi-channel audio decoder is configured to acquire one of the at least two output audio signals on the basis of a downmix signal, a decorrelated signal and a residual signal using a weighted combination of the downmix signal, the decorrelated signal and the residual signal,

wherein the downmix signal, the decorrelated signal and the residual signal are determined by the multi-channel audio decoder on the basis of the encoded representation;

wherein the multi-channel audio decoder is configured to determine a weighting of the decorrelated signal in the weighted combination in dependence on the residual signal and in dependence on the decorrelated signal,

wherein the multi-channel audio decoder is configured to put a comparatively higher weight on the decorrelated signal if the residual signal is comparatively weak, and to put a comparatively smaller weight on the decorrelated signal if the residual signal is comparatively strong;

wherein the multi-channel audio decoder is configured to variably adjust a weighting of the residual signal in the weighted combination in dependence on the downmix signal.

2 . A multi-channel audio decoder for providing at least two output audio signals on the basis of an encoded representation,

wherein the multi-channel audio decoder is configured to acquire one of the at least two output audio signals on the basis of a downmix signal, a decorrelated signal and a residual signal using a weighted combination of the downmix signal, the decorrelated signal and the residual signal,

wherein the downmix signal, the decorrelated signal and the residual signal are determined by the multi-channel audio decoder on the basis of the encoded representation;

wherein the multi-channel audio decoder is configured to determine a weighting of the decorrelated signal in the weighted combination in dependence on the residual signal and in dependence on the decorrelated signal,

wherein the multi-channel audio decoder is configured to put a comparatively higher weight on the decorrelated signal if the residual signal is comparatively weak, and to put a comparatively smaller weight on the decorrelated signal if the residual signal is comparatively strong; and

wherein the multi-channel audio decoder is configured to variably adjust a weighting of the residual signal in the weighted combination in dependence on the decorrelated signal.

3 . A method for providing at least two output audio signals on the basis of an encoded representation, the method comprising:

obtaining a downmix signal, a decorrelated signal and a residual signal on the basis of the encoded representation;

acquiring one of the at least two output audio signals on the basis of the downmix signal, the decorrelated signal and the residual signal using a weighted combination of the downmix signal, the decorrelated signal and the residual signal,

determining a weighting of the decorrelated signal in the weighted combination in dependence on the residual signal and in dependence on the decorrelated signal,

putting a comparatively higher weight on the decorrelated signal if the residual signal is comparatively weak, and putting a comparatively smaller weight on the decorrelated signal if the residual signal is comparatively strong; and

wherein a weight of the residual signal in the weighted combination is variably adjusted in dependence on the downmix signal.

4 . A non-transitory digital storage medium having a computer program stored thereon to perform the method for providing at least two output audio signals based on an encoded representation according to claim 3 when said computer program is run by a computer.

5 . A method for providing at least two output audio signals on the basis of an encoded representation, the method comprising:

obtaining a downmix signal, a decorrelated signal and a residual signal on the basis of the encoded representation;

acquiring one of the at least two output audio signals on the basis of the downmix signal, the decorrelated signal and the residual signal using a weighted combination of the downmix signal, the decorrelated signal and the residual signal,

determining a weighting of the decorrelated signal in the weighted combination in dependence on the residual signal and in dependence on the decorrelated signal,

putting a comparatively higher weight on the decorrelated signal if the residual signal is comparatively weak, and putting a comparatively smaller weight on the decorrelated signal if the residual signal is comparatively strong; and

wherein a weight of the residual signal in the weighted combination is variably adjusted in dependence on the decorrelated signal.

6 . A non-transitory digital storage medium having a computer program stored thereon to perform the method for providing at least two output audio signals based on an encoded representation according to claim 5 when said computer program is run by a computer.

Assignments (1)

Priority Claims (3)

Continuity (5)

References Cited (104)