Granted Patent B2

US 12,462,819 · App. 18/622,507 · Granted Nov 4, 2025

Inventors: Sascha Dick (Nuremberg, DE); Florian Schuh (Zirndorf, DE); Nikolaus Rettelbach (Nuremberg, DE); Tobias Schwegler (Nuremberg, DE); Richard Fueg (Nuremberg, DE); Johannes Hilpert (Nuremberg, DE); Matthias Neusinger (Rohr, DE)

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

G10L19/008G10L19/02H04S3/008H04S2400/01

Abstract

Claims (22)

1 . Apparatus for decoding an encoded multi-channel signal comprising encoded channels and at least first and second multichannel parameters, comprising:

a channel decoder for decoding the encoded channels to acquire decoded channels; and

a multichannel processor for performing a multichannel processing using a second pair of the decoded channels identified by the second multichannel parameters and using the second multichannel parameters to acquire processed channels, and for performing a further multichannel processing using a first pair of channels identified by the first multichannel parameters and using the first multichannel parameters, wherein the first pair of channels comprises at least one processed channel,

wherein the multichannel processing and the further multichannel processing comprise a stereo processing using a stereo parameter, wherein for individual scale factor bands or groups of scale factor bands of the decoded channels, a first stereo parameter is comprised by the first multichannel parameter and a second stereo parameter is comprised by the second multichannel parameter; and

wherein the first stereo parameter comprises a rotation angle, wherein the second stereo parameter comprises a prediction coefficient, or vice versa.

2 . Apparatus of claim 1 ,

wherein the encoded multi-channel signal comprises a multichannel processing allowance indicator indicating only a sub-group of the decoded channels, for which the multichannel processing is allowed and indicating at least one decoded channel for which the multichannel processing is not allowed, and

wherein the multichannel processor is configured for not performing any multichannel processing for the at least one decoded channel, for which the multichannel processing is not allowed as indicated by the multichannel processing allowance indicator.

3 . Apparatus of claim 1 ,

wherein the encoded multi-channel signal is a serial signal, wherein the second multichannel parameters are received, at the decoder, before the first multichannel parameters, and

wherein the multichannel processor is configured to process the decoded channels in an order, in which the multichannel parameters are received by the decoder.

4 . Method of decoding an encoded multi-channel signal comprising encoded channels and at least first and second multichannel parameters, comprising:

decoding the encoded channels to acquire decoded channels; and

performing a multichannel processing using a second pair of the decoded channels identified by the second multichannel parameters and using the second multichannel parameters to acquire processed channels, and performing a further multichannel processing using a first pair of channels identified by the first multichannel parameters and using the first multichannel parameters, wherein the first pair of channels comprises at least one processed channel,

wherein the multichannel processing and the further multichannel processing comprise a stereo processing using a stereo parameter, wherein for individual scale factor bands or groups of scale factor bands of the decoded channels, a first stereo parameter is comprised by the first multichannel parameter and a second stereo parameter is comprised by the second multichannel parameter; and

wherein the first stereo parameter comprises a rotation angle, wherein the second stereo parameter comprises a prediction coefficient, or vice versa.

5 . Non-transitory digital storage medium having a computer program stored thereon to perform the method of decoding an encoded multi-channel signal comprising encoded channels and at least first and second multichannel parameters, comprising:

decoding the encoded channels to acquire decoded channels; and

performing a multichannel processing using a second pair of the decoded channels identified by the second multichannel parameters and using the second multichannel parameters to acquire processed channels, and performing a further multichannel processing using a first pair of channels identified by the first multichannel parameters and using the first multichannel parameters, wherein the first pair of channels comprises at least one processed channel,

wherein the multichannel processing and the further multichannel processing comprise a stereo processing using a stereo parameter, wherein for individual scale factor bands or groups of scale factor bands of the decoded channels, a first stereo parameter is comprised by the first multichannel parameter and a second stereo parameter is comprised by the second multichannel parameter; and

wherein the first stereo parameter comprises a rotation angle, wherein the second stereo parameter comprises a prediction coefficient, or vice versa;

when said computer program is run by a computer.

Assignments (1)

Priority Claims (2)

Continuity (6)

References Cited (69)