US 11,676,615 B2
Resampling output signals of QMF based audio codec
Markus Lohwasser, Hersbruck (DE); Manuel Jander, Erlangen (DE); Max Neuendorf, Nuremberg (DE); Ralf Geiger, Erlangen (DE); Markus Schnell, Nuremberg (DE); Matthias Hildenbrand, Erlangen (DE); and Tobias Chalupka, Heroldsberg (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 5, 2022, as Appl. No. 17/737,941.
Application 17/737,941 is a continuation of application No. 16/398,669, filed on Apr. 30, 2019, granted, now 11,361,779.
Application 16/398,669 is a continuation of application No. 15/424,625, filed on Feb. 3, 2017, granted, now 10,311,886, issued on Jun. 4, 2019.
Application 15/424,625 is a continuation of application No. 13/762,614, filed on Feb. 8, 2013, granted, now 9,595,265, issued on Mar. 14, 2017.
Application 13/762,614 is a continuation of application No. PCT/EP2011/063848, filed on Aug. 11, 2011.
Claims priority of provisional application 61/373,126, filed on Aug. 12, 2010.
Prior Publication US 2022/0262382 A1, Aug. 18, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/24 (2013.01); G10L 19/16 (2013.01); G10L 19/008 (2013.01); G10L 19/02 (2013.01); G10L 19/26 (2013.01); H03H 17/02 (2006.01); H03H 17/06 (2006.01)
CPC G10L 19/24 (2013.01) [G10L 19/008 (2013.01); G10L 19/0204 (2013.01); G10L 19/16 (2013.01); G10L 19/26 (2013.01); H03H 17/0211 (2013.01); H03H 17/0272 (2013.01); H03H 17/0621 (2013.01); G10L 19/02 (2013.01); H03H 17/0294 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus for processing an audio signal to acquire an audio output signal, comprising:
a configurable audio signal processor for processing the audio signal in accordance with different configuration settings to obtain a processed audio signal, wherein the apparatus is adapted so that different configuration settings result in different sampling rates of the processed audio signal,
an analysis filter bank having a first number of analysis filter bank channels, wherein the analysis filter bank is adapted to transform an analysis filter bank input signal from a time-domain to a time-frequency domain,
a synthesis filter bank having a second number of synthesis filter bank channels, wherein the synthesis filter bank is adapted to conduct a transformation from the time-frequency domain to the time domain to produce an audio signal output of the synthesis filter bank as the audio output signal,
a controller for controlling the first number of analysis filter bank channels and the second number of synthesis filter bank channels in accordance with a configuration setting provided to the configurable audio signal processor, so that the audio signal output of the synthesis filter bank has a predetermined sampling rate or a sampling rate being different from the predetermined sampling rate and being closer to the predetermined sampling rate than a sampling rate of the analysis filter bank input signal,
wherein the apparatus is adapted to receive the configuration setting at run time.