Part 3 of the MPEG-2 standard (formally known as ISO/IEC 13818-3, also known as MPEG-2 Audio or MPEG-2 BC) defines audio coding:

The MPEG-2 Part 3 should not be confused with MPEG-2 Part 7: AAC a.k.a. MPEG-2 NBC (Non-Backward Compatible) - the MPEG-2 Advanced Audio Coding with support for multichannel encoding (up to 48 channels).[1][2]

Overview

MPEG-2 Part 3 introduced new audio encoding methods compared to MPEG-1 Part 3:[7] MPEG-2 BC (backward compatible with MPEG-1 audio formats)[1][2][5]

  • low bitrate encoding with halved sampling rate (MPEG-1 Layer 1/2/3 LSF - "Low Sampling Frequencies")
  • multichannel encoding with up to 5.1 channels

References

  1. ^ a b c ISO (October 1998). "MPEG Audio FAQ Version 9 - MPEG-1 and MPEG-2 BC". ISO. Retrieved 2009-10-28.
  2. ^ a b c MPEG.ORG. "AAC". Archived from the original on 2007-08-31. Retrieved 2009-10-28.
  3. ^ ISO (2006-01-15), ISO/IEC 13818-7, Fourth edition, Part 7 - Advanced Audio Coding (AAC) (PDF), retrieved 2009-10-28
  4. ^ ISO (2004-10-15), ISO/IEC 13818-7, Third edition, Part 7 - Advanced Audio Coding (AAC) (PDF), archived from the original (PDF) on 2011-07-13, retrieved 2009-10-19
  5. ^ a b Werner Oomen; Leon van de Kerkhof. "MPEG-2 Audio Layer I/II". chiariglione.org. Retrieved 2009-12-29.
  6. ^ Predrag Supurovic, MPEG Audio Frame Header, Retrieved on 2009-07-11
  7. ^ D. Thom, H. Purnhagen, and the MPEG Audio Subgroup (October 1998). "MPEG Audio FAQ Version 9 - MPEG Audio". Retrieved 2009-10-31.CS1 maint: multiple names: authors list (link)