MPEG-2 Part 3
Part 3 of the MPEG-2 standard defines audio coding:
The MPEG-2 Part 3 should not be confused with MPEG-2 Part 7: AAC a.k.a. MPEG-2 NBC - the MPEG-2 Advanced Audio Coding with support for multichannel encoding.Overview
MPEG-2 Part 3 introduced new audio encoding methods compared to MPEG-1 Part 3: MPEG-2 BC
- low bitrate encoding with halved sampling rate
- multichannel encoding with up to 5.1 channels