Patent Document ID: 20170178645
Application ID: 15446562
Patent Status: 0

Claim One:
1. A method for reconstructing a wideband audio signal, the method comprising: decomposing a lowband audio signal into a plurality of complex subband signals with an analysis filterbank; generating a highband audio signal by patching a number of consecutive complex subband signals, wherein the generating includes: frequency translating a complex subband signal in a source area channel of the lowband audio signal having an index i to a reconstruction range channel having an index j of the highband audio signal, and frequency translating a complex subband signal in a source area channel of the lowband audio signal having an index i+1 to a reconstruction range channel having an index j+1 of the highband audio signal; adjusting a spectral envelope of the highband audio signal to a desired level; combining the lowband audio signal and the highband audio signal with a synthesis filterbank to generate the wideband audio signal, wherein the lowband audio signal has frequency components below a crossover frequency and the highband audio signal has frequency components above the crossover frequency, and wherein the generating includes using a first parameter to determine a number of source area channels to be translated for a respective patch and using a second parameter to determine a start location of a reconstruction range for the respective patch.