US RE50,692 E1
Apparatus and method for generating a synthesis audio signal and for encoding an audio signal
Frederik Nagel, Nuremberg (DE); Markus Multrus, Nuremberg (DE); Jérémie Lecomte, Fuerth (DE); Stefan Bayer, Nuremberg (DE); Guillaume Fuchs, Bubenreuth (DE); Johannes Hilpert, Nuremberg (DE); and Julien Robilliard, Nuremberg (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 Jun. 23, 2022, as Appl. No. 17/848,163.
Application 17/848,163 is a division of application No. 17/846,565, filed on Jun. 22, 2022, granted, now RE50601.
Application 17/848,163 is a division of application No. 13/107,687, filed on May 13, 2011, granted, now 8,386,268, issued on Feb. 26, 2013.
Application 17/846,565 is a continuation of application No. PCT/EP2010/054434, filed on Apr. 1, 2010.
Application 17/848,163 is a reissue of application No. 13/687,678, filed on Nov. 28, 2012, granted, now 9,076,433, issued on Jul. 7, 2015.
Claims priority of provisional application 61/168,068, filed on Apr. 9, 2009.
Claims priority of application No. 09181008 (EP), filed on Dec. 30, 2009.
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); G10L 19/18 (2013.01); G10L 21/038 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/18 (2013.01); G10L 21/038 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An apparatus for generating a synthesis audio signal using a patching control signal, the apparatus comprising:
a first converter for converting a time portion of an audio signal into a spectral representation;
a spectral domain patch generator for performing a plurality of different spectral domain patching algorithms, wherein each patching algorithm generates a modified spectral representation comprising spectral components in an upper frequency band derived from corresponding spectral components in a core frequency band of the audio signal, and wherein the spectral domain patch generator is configured to select a first spectral domain patching algorithm from the plurality of patching algorithms for a first time portion and a second spectral domain patching algorithm from the plurality of patching algorithms for a second different time portion in accordance with the patching control signal to achieve the modified spectral representation;
a high frequency reconstruction manipulator for manipulating the modified spectral representation or a signal derived from the modified spectral representation in accordance with a spectral band replication parameter to achieve a bandwidth extended signal; and
a combiner for combining the audio signal comprising spectral components in the core frequency band or a signal derived from the audio signal with the bandwidth extended signal to achieve the synthesis audio signal,
wherein the spectral domain patch generator is configured for performing at least two different spectral domain patching algorithms from a group of patching algorithms in the spectral domain, the group of patching algorithms comprising a first patching algorithm comprising a harmonic transposition based on a single phase vocoder and non-harmonic copying-up spectral band replication functionalities, a second patching algorithm comprising a harmonic transposition based on a multiple phase vocoder, a third patching algorithm comprising non-harmonic copying-up spectral band replication functionalities and a fourth patching algorithm comprising a non-linear distortion, and
wherein at least one of the first converter, the spectral domain patch generator, the high frequency reconstruction manipulator and the combiner comprises a hardware implementation.