US RE50,015 E1
Apparatus and method for generating audio subband values and apparatus and method for generating time-domain audio samples
Markus Schnell, Erlangen (DE); Manfred Lutzky, Nuremberg (DE); Markus Lohwasser, Hersbruck (DE); Markus Schmidt, Erlangen (DE); Marc Gayer, Erlangen (DE); Michael Mellar, Ludwigshafen (DE); Bernd Edler, Hannover (DE); Markus Multrus, Nuremberg (DE); Gerald Schuller, Erfurt (DE); Ralf Geiger, Ilmenau (DE); and Bernhard Grill, Lauf (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Appl. No. 17/845,435
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
PCT Filed Oct. 23, 2007, PCT No. PCT/EP2007/009200
§ 371(c)(1), (2), (4) Date Aug. 31, 2009,
PCT Pub. No. WO2008/049590, PCT Pub. Date May 2, 2008.
Application 17/845,435 is a division of application No. 17/845,375, filed on Jun. 21, 2022.
Application 17/845,375 is a reissue of application No. 12/293,532, filed on Oct. 23, 2007, granted, now 8,438,015, issued on May 7, 2013.
Application 17/845,435 is a reissue of application No. 12/293,532, filed on Oct. 23, 2007, granted, now 8,438,015, issued on May 7, 2013.
Claims priority of provisional application 60/862,954, filed on Oct. 25, 2006.
This patent is subject to a terminal disclaimer.
Int. Cl. G01L 19/14 (2006.01); G10L 19/02 (2013.01); G10L 19/022 (2013.01); G10L 25/45 (2013.01); H03H 17/02 (2006.01); G10L 21/038 (2013.01)
CPC G10L 19/0204 (2013.01) [G10L 19/022 (2013.01); G10L 25/45 (2013.01); H03H 17/0266 (2013.01); G10L 21/038 (2013.01)] 7 Claims
OG exemplary drawing
 
[ 25. An apparatus for generating audio subband values in audio subband channels, comprising:
an analysis windower for windowing a frame of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function comprising a sequence of window coefficients to acquire windowed samples, the analysis window function comprising a first number of window coefficients derived from a larger window function comprising a sequence of a larger second number of window coefficients,
wherein the window coefficients of the window function are derived by an interpolation of window coefficients of the larger window function; and
wherein the second number is an even number; and
a calculator for calculating the audio subband values using the windowed samples,
wherein the analysis windower is adapted such that the windowing comprises multiplying the time-domain audio input samples x(n) of the frame to acquire the windowed samples z(n) of the windowed frame based on the equation
z(n)=x(n)·c(n)
wherein n is an integer indicating an index of the sequence of window coefficients in the range of 0 to T·N−1, wherein c(n) is the window coefficient of the analysis window function corresponding to the index n, wherein x(N·T−1) is the latest time-domain audio input sample of the frame of time-domain audio input samples, wherein the analysis windower is adapted such that the frame of time-domain audio input samples comprises a sequence of T blocks of time-domain audio input samples extending from the earliest to the latest time-domain audio input samples of the frame, each block comprising N time-domain audio input samples, and wherein T and N are positive integers and T is larger than 4. ]