Patent ID: 9741362
Date: 2017-08-22
CPC Classifications: G10L

Claim:
1. An audio processing device including a subband processing unit configured to determine a synthesis subband signal from an analysis subband signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples at different times, each having a phase and a magnitude; wherein the analysis subband signal is associated with a frequency band of an input audio signal; wherein the subband processing unit comprises a block extractor configured to repeatedly a nonlinear frame processing unit configured to determine a frame of processed samples from a frame of input samples, by determining for each processed sample of the frame: an overlap and add unit configured to determine the synthesis subband signal by overlapping and adding the samples of a suite of frames of processed samples; wherein the synthesis subband signal is associated with a frequency band of a signal which is time stretched and/or frequency transposed with respect to the input audio signal, wherein one or more of the block extractor, the nonlinear frame processing unit, and the overlap and add unit is implemented, at least in part, by one or more hardware elements of the audio processing device.