US 11,790,928 B2
Resampling output signals of QMF based audio codecs
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 Feb. 10, 2021, as Appl. No. 17/172,254.
Application 17/172,254 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 2021/0166709 A1, Jun. 3, 2021
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, comprising:
a configurable first audio signal processor for processing an input audio signal in accordance with different configuration settings to acquire 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 adapted to receive the processed audio signal as an analysis filter bank input signal, the analysis filter bank comprising a first number of analysis filter bank channels, wherein the analysis filter bank is adapted to transform the analysis filter bank input signal from a time-domain to a time-frequency domain,
a synthesis filter bank adapted to receive output from the analysis filter bank, the synthesis filter bank comprising a second number of synthesis filter bank channels to produce a resultant audio signal, wherein the synthesis filter bank is adapted to transform the output of the analysis filter bank from the time-frequency domain to the time domain to produce the resultant audio signal,
a second audio processor being adapted to receive and process the resultant audio signal comprising a predetermined sampling rate to produce a resultant digital output signal, and
a controller for controlling the first number of analysis filter bank channels in accordance with a configuration setting provided to the configurable first audio signal processor, so that the resultant audio signal output of the synthesis filter bank comprises the 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.