Figure 7From: An Overview of the Coding Standard MPEG-4 Audio Amendments 1 and 2: HE-AAC, SSC, and HE-AAC v2Spectrum of the signal at different points of processing in the SBR decoder. Top left is the (power) spectrum of the original signal, top right is the spectrum of the low-band signal resulting from the AAC decoder, bottom left is the spectrum of the combined low-band and high-band prior to envelope adjustment, bottom right is the spectrum of the output signal.Back to article page