US 12,190,897 B2
Apparatus and method for processing an audio signal using a harmonic post-filter
Emmanuel Ravelli, Erlangen (DE); Christian Helmrich, Berlin (DE); Goran Markovic, Nuremberg (DE); Matthias Neusinger, Rohr (DE); Sascha Disch, Fuerth (DE); Manuel Jander, Hemhofen (DE); and Martin Dietz, 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 May 16, 2023, as Appl. No. 18/197,724.
Application 18/197,724 is a continuation of application No. 17/144,979, filed on Jan. 8, 2021, granted, now 11,694,704.
Application 17/144,979 is a continuation of application No. 16/288,018, filed on Feb. 27, 2019, granted, now 11,037,580, issued on Jun. 15, 2021.
Application 16/288,018 is a continuation of application No. 15/417,231, filed on Jan. 27, 2017, granted, now 10,242,688, issued on Mar. 26, 2019.
Application 15/417,231 is a continuation of application No. PCT/EP2015/066998, filed on Jul. 24, 2015.
Claims priority of application No. 14178820 (EP), filed on Jul. 28, 2014.
Prior Publication US 2023/0282223 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/26 (2013.01); G10L 19/025 (2013.01); G10L 19/02 (2013.01); G10L 21/02 (2013.01)
CPC G10L 19/26 (2013.01) [G10L 19/025 (2013.01); G10L 19/0212 (2013.01); G10L 21/02 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus for processing an audio signal, comprising:
a domain converter for converting a first domain representation of the audio signal into a second domain representation of the audio signal,
wherein the audio signal being an input signal into the apparatus for processing has associated therewith a pitch lag information and a gain information, wherein the pitch lag information indicates a pitch lag having an integer part and a fractional part; and
a harmonic post-filter for filtering the second domain representation of the audio signal,
wherein the harmonic post-filter is configured to account for the integer part of the pitch lag indicated by the pitch lag information associated with the audio signal and the fractional part of the pitch lag indicated by the pitch lag information associated with the audio signal.