AAC ：
1.MPEG-2 low-complexity AAC (AAC-LC)
2.MPEG-4 low-complexity AAC (AAC-LC)
AACPlus：
1.aacPlus ＝ MPEG-4 HE–AAC ＝ AACPlus v1 = AAC + SBR(Spectral Band Replication)
2. aacPlus v2 = AACPlus v1 + PS =AAC + SBR + PS(Parametirc Stereo)
File formats: ADIF, .mp4/m4a, .3gp/3g2, raw
Streaming formats : ADTS, LATM,LOAS
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