Patent ID: 9190067
Filing Date: 2015-11-17
Classification: G10H,G10L

Abstract:
1. A system configured to generate a high frequency component of a signal from a low frequency component of the signal, the system comprising: an analysis filter bank configured to provide a set of analysis subband signals from the low frequency component of the signal; wherein the set of analysis subband signals comprises at least two analysis subband signals; wherein the analysis filter bank has a frequency resolution of Δf; a nonlinear processing unit configured to determine a set of synthesis subband signals from the set of analysis subband signals; wherein the nonlinear processing unit is configured to determine an n a synthesis filter bank configured to generate the high frequency component of the signal based on the set of synthesis subband signals; wherein the synthesis filter bank has a frequency resolution of FΔf; with F being a resolution factor, with F≧1; wherein the analysis filter bank and the synthesis filter bank are evenly stacked such that a center frequency of an analysis subband is given by kΔf and a center frequency of a synthesis subband is given by nFΔf; wherein the analysis filter bank, the nonlinear processing unit, or the synthesis filter bank are implemented at least in part in hardware; wherein the analysis filter bank has a number L