US 12,354,615 B2
Audio decoder, method and computer program using a zero-input-response to obtain a smooth transition
Emmanuel Ravelli, Erlangen (DE); Guillaume Fuchs, Bubenreuth (DE); Sascha Disch, Fuerth (DE); Markus Multrus, Nuremberg (DE); Grzegorz Pietrzyk, Nuremberg (DE); and Benjamin Schubert, 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 Oct. 19, 2023, as Appl. No. 18/381,866.
Application 18/381,866 is a continuation of application No. 17/479,151, filed on Sep. 20, 2021, granted, now 11,922,961.
Application 17/479,151 is a continuation of application No. 16/427,488, filed on May 31, 2019, granted, now 11,170,797, issued on Nov. 9, 2021.
Application 16/427,488 is a continuation of application No. 15/416,052, filed on Jan. 26, 2017, granted, now 10,325,611, issued on Jun. 18, 2019.
Application 15/416,052 is a continuation of application No. PCT/EP2015/066953, filed on Jul. 23, 2015.
Claims priority of application No. 14178830 (EP), filed on Jul. 28, 2014.
Prior Publication US 2024/0046941 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); G10L 19/02 (2013.01); G10L 19/12 (2013.01); G10L 19/20 (2013.01)
CPC G10L 19/20 (2013.01) [G10L 19/02 (2013.01); G10L 19/12 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An audio decoder for providing a decoded audio information on the basis of an encoded audio information, the audio decoder comprising:
a linear-prediction-domain decoder configured to provide a first decoded audio information on the basis of an audio frame encoded in a linear prediction domain;
a frequency domain decoder configured to provide a second decoded audio information on the basis of an audio frame encoded in a frequency domain,
wherein the frequency-domain decoder is configured to perform an inverse lapped transform and
a transition processor,
wherein the transition processor is configured to obtain a zero-input-response of a linear predictive filtering, wherein an initial state of the linear predictive filtering is defined in dependence on the first decoded audio information, and
wherein the transition processor is configured to obtain a windowed and time-mirrored version of the first decoded audio information, and
wherein the transition processor is configured to modify the second decoded audio information, which is provided on the basis of an audio frame encoded in the frequency domain following an audio frame encoded in the linear prediction domain, in dependence on the zero-input-response and in dependence on the windowed and time-mirrored version of the first decoded audio information.