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An Overview of the Coding Standard MPEG-4 Audio Amendments 1 and 2: HE-AAC, SSC, and HE-AAC v2

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Figure

Figure 7 the spectrum of the transposed intermediate signal
Figure 12: Envelope adjustment in a real-valued QMF filter bank.two subbands have a shared sinusoid in the overlapping range
Figure 20: Structure of the SSC encoder (left) and decoder (right)extended with PS. The PS encoder generates a down-mix and PSparameters

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