Description

This article is from the MPEG FAQ, by Frank Gadegast phade@cs.tu-berlin.de with numerous contributions by others.

36 What are the main differences between MPEG-1 and MPEG-2 in the audio part? (MPEG Audio Codec Family ("Layer 1, 2, 3"))

MPEG-1 and MPEG-2 use the same family of audio codecs, Layer-1, -2
and -3. The new audio features of MPEG-2 are:
"low sample rate extension" to address very low bitrate applications
with limited bandwidth requirements (the new sampling frequencies
are 16, 22.05 or 24 kHz, the bitrates extend down to 8 kbps),
"multichannel extension" to address surround sound applications
with up to 5 main audio channels (left, center, right, left surround,
right surround) and optionally 1 extra "low frequency enhancement
(LFE)" channel for subwoofer signals; in addition, a "multilingual
extension" allows the inclusion of up to 7 more audio channels.

 

Continue to:

• prev: 35 What are the main differences between the three Layers, from a global view? (MPEG Audio Codec Family ("Layer 1, 2, 3"))
• Index
• next: 37 A lot of new stuff! Is this all compatible to each other? (MPEG Audio Codec Family ("Layer 1, 2, 3"))

Share and Enjoy

Tags

pc, MPEG, compression, video, audio, mp3, layers, bitstream, software, books, publications, technology, standard, shareware, free