US RE50,676 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. 17/848,212.
Application 17/848,212 is a division of application No. 17/846,565, filed on Jun. 22, 2022, granted, now RE50601.
Application 13/687,678 is a continuation of application No. 13/107,687, filed on May 13, 2011, granted, now 8,386,268, issued on Feb. 26, 2013.
Application 13/107,687 is a continuation of application No. PCT/EP2010/054434, filed on Apr. 1, 2010.
Application 17/846,565 is a reissue of application No. 13/687,678, filed on Nov. 28, 2012, granted, now 9,076,433, issued on Jul. 7, 2015.
Application 17/848,212 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 19/18 (2013.01); G10L 19/00 (2013.01); G10L 19/008 (2013.01); G10L 21/038 (2013.01); G10L 19/02 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/18 (2013.01); G10L 21/038 (2013.01); G10L 19/02 (2013.01)] 6 Claims
OG exemplary drawing
 
[ 13. A method for generating a synthesis audio signal using a patching control signal, the method comprising:
converting a time portion of an audio signal into a spectral representation;
performing, by a spectral domain patch generator, 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 component in a core frequency band of the audio signal, and selecting 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;
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
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 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 multiple phase vocoder and a second patching algorithm comprising non-harmonic copying-up spectral band replication functionalities,
wherein the method for generating the synthesis audio signal is an audio decoding method, wherein the patching control signal is received by the audio decoding method, and wherein the audio decoding method comprises decoding an encoded audio signal within a core frequency band to obtain the time portion of the audio signal. ]