Patent ID: 8983852
Filing Date: 2015-03-17
Classification: G10H,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, 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 ; wherein the analysis filter bank has a number L a nonlinear processing unit configured to determine a set of synthesis subband signals from the set of analysis subband signals using a transposition order P; wherein the set of synthesis subband signals is determined based on a portion of the set of analysis subband signals phase shifted by an amount derived from the transposition order P; and a synthesis filter bank configured to generate the high frequency component of the signal from 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 transposition order P is different from the resolution factor F ; wherein the synthesis filter bank has a number L