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MPEG-4 Part 3
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==HE-AAC== {{Main|HE-AAC}} [[High-Efficiency Advanced Audio Coding]] is an extension of [[Advanced Audio Coding|AAC LC]] using [[spectral band replication]] (SBR), and [[Parametric Stereo]] (PS). It is designed to increase coding efficiency at low bitrates by using partial parametric representation of audio.
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