US RE50,650 E1
Apparatus and method for generating a bandwidth extended signal
Frederik Nagel, Nuremberg (DE); Sascha Disch, Fuerth (DE); Max Neuendorf, Nuremberg (DE); Stefan Bayer, Nuremberg (DE); Marc Gayer, Erlangen (DE); Markus Lohwasser, Hersbruck (DE); Nikolaus Rettelbach, Nuremberg (DE); and Ulrich Kraemer, Stuttgart (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed on Nov. 22, 2023, as Appl. No. 18/518,309.
Application 18/518,309 is a continuation of application No. 16/230,764, filed on Dec. 21, 2018, granted, now RE49801.
Application 16/230,764 is a continuation of application No. 15/341,763, filed on Nov. 2, 2016, granted, now RE47180.
Application 13/004,314 is a continuation of application No. PCT/EP2009/004603, filed on Jun. 25, 2009.
Application 15/341,763 is a reissue of application No. 13/004,314, filed on Jan. 11, 2011, granted, now 8,880,410, issued on Nov. 4, 2014.
Application 18/518,309 is a reissue of application No. 13/004,314, filed on Jan. 11, 2011, granted, now 8,880,410, issued on Nov. 4, 2014.
Claims priority of provisional application 61/079,849, filed on Jul. 11, 2008.
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/00 (2013.01); G10L 21/038 (2013.01)
CPC G10L 21/038 (2013.01) 14 Claims
OG exemplary drawing
 
[ 18. An apparatus for generating a bandwidth extended signal from an input signal, the apparatus comprising:
a patch generator configured to generate a first patch based on a first band of the input signal and configured to generate a second patch based on the first band of the input signal, wherein a spectral density of the second patch is higher than a spectral density of the first patch, wherein the input signal has an upper cut-off frequency, and wherein the first band of the input signal comprises first band data having a first resolution, wherein a second band of the input signal comprises second band data having a second resolution, wherein the second resolution is lower than the first resolution, wherein the second band data comprise missing harmonic data, and spectral envelope data;
a missing harmonic adder configured to generate a missing harmonic patch based on the missing harmonic data contained in the second band data of the input signal;
a combiner configured to combine the first band of the input signal, the first patch, the second patch, and the missing harmonic patch to acquire the bandwidth extended signal; and
a power controller configured to control a scaling of the first patch, the second patch, and the missing harmonic patch based on the spectral envelope data contained in the second band data of the input signal, so that a spectral envelope criterion is fulfilled, wherein the spectral envelope criterion is determined based on a spectral envelope of an original signal. ]