Patent ID: 9697841
Date: 2017-07-04
CPC Classifications: G10L

Claim:
1. A method for decoding coded signals, the coded signals comprising a coded lowband audio signal, comprising: separating the coded lowband audio signal from the coded signals; audio decoding the coded lowband audio signal to obtain a decoded audio signal; obtaining an envelope adjusted and frequency-translated signal, comprising: filtering the decoded audio signal using an analysis filterbank to obtain complex-valued subband signals within a source range, wherein each complex-valued subband signal is represented by a real-valued component and an imaginary-valued component; patching the real-valued component and the imaginary-valued component of a complex-valued subband signal with index i within the source range to a complex-valued subband signal with index j within a reconstruction range, wherein the source range comprises frequencies lower than frequencies in the reconstruction range; patching the real-valued component and the imaginary-valued component of a complex-valued subband signal with index i+1 within the source range to a complex-valued subband signal with index j+1 within a reconstruction range; applying an envelope adjustment to the patched complex-valued subband signals within the reconstruction range; and filtering the patched and envelope adjusted complex-valued subband signals within the reconstruction range using a synthesis filterbank to obtain the envelope adjusted and frequency translated signal.