Patent ID: 8886346
Filing Date: 2014-11-11
Classification: C12Q,G10L

Abstract:
1. A system configured to generate a high frequency component of an audio signal from a low frequency component of the audio signal, comprising: an analysis filter bank comprising an analysis transformation unit having a frequency resolution of Δf; and an analysis window having a duration of D a nonlinear processing unit configured to determine a set of synthesis subband signals based on a portion of the set of analysis subband signals, wherein the portion of the set of analysis subband signals is phase shifted by a transposition order T; and a synthesis filter bank comprising a synthesis transformation unit having a frequency resolution of QΔf; and a synthesis window having a duration of D wherein Q is a frequency resolution factor with Q≧1 and smaller than the transposition order T; and wherein the value of the product of the frequency resolution Δf and the duration D A of the analysis filter bank is selected based on the frequency resolution factor Q.