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55 All in all, you sound as if anybody should use Layer-3 for low bitrates. Why on earth do some vendors still offer only Layer-2 equipment for these applications? (MPEG Audio Layer-3 Applications)




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

55 All in all, you sound as if anybody should use Layer-3 for low bitrates. Why on earth do some vendors still offer only Layer-2 equipment for these applications? (MPEG Audio Layer-3 Applications)

Well, maybe because they started to design and develop their systems
rather early, e.g. in 1990. As Layer-2 is identical with MUSICAM, it has
been available since summer of 1990, at latest. In that year, Layer-3
development started and could be successfully finished at the end of 1991.
So, for a certain time, vendors could only exploit the already existing part
of the new MPEG standard.
Now the situation has changed. All Layers are available, the standard is
completed, and new systems may capitalize on the full features of MPEG
audio.

 

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previous page: 54  Someone told me that, with Layer-3, the codec delay would depend on the actual audio signal, varying over the time. Is this really true? (MPEG Audio Layer-3 Applications)
  
page up: MPEG FAQ
  
next page: 56  What are the main fields of application for Layer-3? (MPEG Audio Layer-3 Products)