US 12,406,679 B2
Low bitrate audio encoding/decoding scheme having cascaded switches
Bernhard Grill, Lauf (DE); Roch Lefebvre, Canton de Magog (CA); Bruno Bessette, Sherbrooke (CA); Jimmy Lapierre, Sherbrooke (CA); Philippe Gournay, Sherbrooke (CA); Redwan Salami, Saint-Laurent (CA); Stefan Bayer, Nuremberg (DE); Guillaume Fuchs, Nuremberg (DE); Stefan Geyersberger, Wuerzburg (DE); Ralf Geiger, Nuremberg (DE); Johannes Hilpert, Nuremberg (DE); Ulrich Kraemer, Stuttgart (DE); Jérémie Lecomte, Nuremberg (DE); Markus Multrus, Nuremberg (DE); Max Neuendorf, Nuremberg (DE); Harald Popp, Tuchenbach (DE); and Nikolaus Rettelbach, 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 Nov. 7, 2024, as Appl. No. 18/940,483.
Application 18/940,483 is a continuation of application No. 18/451,067, filed on Aug. 16, 2023.
Application 18/451,067 is a continuation of application No. 17/933,567, filed on Sep. 20, 2022, granted, now 11,823,690, issued on Nov. 21, 2023.
Application 17/933,567 is a continuation of application No. 16/834,601, filed on Mar. 30, 2020, granted, now 11,475,902, issued on Oct. 18, 2022.
Application 16/834,601 is a continuation of application No. 16/398,082, filed on Apr. 29, 2019, granted, now 10,621,996, issued on Apr. 14, 2020.
Application 16/398,082 is a continuation of application No. 14/580,179, filed on Dec. 22, 2014, granted, now 10,319,384, issued on Jun. 11, 2019.
Application 14/580,179 is a continuation of application No. 13/004,385, filed on Jan. 11, 2011, granted, now 8,930,198, issued on Jan. 6, 2015.
Application 13/004,385 is a continuation of application No. PCT/EP2009/004652, filed on Jun. 26, 2009.
Claims priority of provisional application 61/079,854, filed on Jul. 11, 2008.
Claims priority of application No. 08017663 (EP), filed on Oct. 8, 2008; and application No. 09002271 (EP), filed on Feb. 18, 2009.
Prior Publication US 2025/0069608 A1, Feb. 27, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/18 (2013.01); G10L 19/008 (2013.01); G10L 19/022 (2013.01); G10L 19/16 (2013.01); G10L 19/26 (2013.01); G10L 19/00 (2013.01); G10L 19/02 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/173 (2013.01); G10L 19/18 (2013.01); G10L 2019/0008 (2013.01); G10L 19/0017 (2013.01); G10L 19/0212 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A decoding device for decoding an encoded audio signal, the encoded audio signal comprising a first encoded signal, a first processed signal in a second domain, and a second processed signal in a third domain, comprising:
a first decoding branch configured for decoding the first encoded signal to obtain a decoded first signal;
a second decoding branch configured for decoding the first processed signal or the second processed signal,
wherein the second decoding branch comprises
a first inverse processing branch configured for inverse processing the first processed signal to acquire a first inverse processed signal in the second domain;
a second inverse processing branch configured for inverse processing the second processed signal to acquire a second inverse processed signal in the second domain;
a first combiner configured for combining the first inverse processed signal and the second inverse processed signal to acquire a combined signal in the second domain; and
a converter configured for converting the combined signal in the second domain to a first domain to acquire a converted signal;
a second combiner configured for combining the converted signal and the decoded first signal output by the first decoding branch to acquire a combined signal in the first domain; and
a common post-processing stage for processing the combined signal in the first domain, wherein an output signal of the common post-processing stage is an expanded version of the combined signal in the first domain,
wherein the first decoding branch and the second decoding branch are operative to operate in a block wise manner, wherein a switching over action in the first combiner or the second combiner takes place, at a minimum, after a block of a predefined number of samples, the predefined number of samples forming a frame length for the corresponding combiner, and wherein a first size of a first frame length for the second combiner is greater than a second size of a second frame length of the first combiner.