Patent ID: 8880410

Claim:
An apparatus for generating a bandwidth extended signal from an input signal, wherein the input signal is represented, for a first band by a first resolution data, and for a second band by a second resolution data, the second resolution being lower than the first resolution, the apparatus comprising: a patch generator configured to generate a first patch from the first band of the input signal according to a first patching algorithm and configured to generate a second patch from the first band of the input signal according to a second patching algorithm, wherein a spectral density of the second patch generated according to the second patching algorithm is higher than a spectral density of the first patch generated according to the first patching algorithm; and a combiner configured to combine the first patch, the second patch and the first band of the input signal to acquire the bandwidth extended signal, wherein the apparatus for generating a bandwidth extended signal is configured to scale the input signal according to the first patching algorithm and according to the second patching algorithm or to scale the first patch and the second patch, or to scale only one of the first and second patches to obtain a scaled patch, to then combine the scaled patch and a non-scaled patch from the first and second patches to obtain combined patches, and to then scale the combined patches before combining the combined patches with the first band of the input signal, so that the bandwidth extended signal fulfills a spectral envelope criterion.