Patent ID: 8412365
Filing Date: 2013-04-02
Classification: G10L

Abstract:
1. Method for obtaining an envelope adjusted and frequency-translated signal by high-frequency spectral reconstruction, comprising: calculating a number of consecutive subband signals in channels within a reconstruction range using a number of frequency-translated consecutive subband signals in source area channels and an envelope correction, the subband signals in the source area channels being derived from a lowband signal using a digital filter bank, wherein the reconstruction range comprises channel frequencies being higher than frequencies in the source area channels, wherein a subband signal in a source area channel having an index i is frequency-translated to a subband signal in a reconstruction range channel having an index j, and wherein a subband signal in a source area channel having an index i+1 is frequency-translated to a subband signal in a reconstruction range channel having an index j+1; and filtering the consecutive subband signals in channels within the reconstruction rage using of a synthesis part of a digital filterbank to obtain an envelope adjusted and frequency translated signal.