Patent ID: 8738369

Claim:
An apparatus for decoding an encoded signal to obtain an output audio signal that represents an original audio signal, wherein the apparatus comprises: a demultiplexer for receiving the encoded signal and obtaining therefrom a noise level parameter and spectral envelope parameters for high-frequency bands of the original audio signal and encoded audio data; an audio decoder for decoding the encoded audio data to obtain a decoded audio signal that represents low-frequency bands of the original audio signal, and for generating a reconstructed signal by replicating harmonics in the low-frequency bands of the decoded audio signal into the high-frequency bands and adding noise to replicated harmonics in the high-frequency bands, wherein the noise is adapted according to the noise level parameter and the reconstructed signal has levels adapted according to the spectral envelope parameters; and a complex low delay filter bank for synthesizing the output audio signal from a combination of the decoded audio signal and the reconstructed signal.