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Subject: Back to wav
From: Matt.OReilly_at_wachovia.com
Date: 2002-05-10


Does anyone know if there is a *lossless* audio compression algorithm out
there? My guess is that it would be similar to pkzip compression, where it
would be possible to reconstruct the entirety of the original file without
changing any bits.

We had discussed something like this a while ago, but I was thinking more
about it... Someone mentioned that the Archos has a 1MB/sec pipe that
can't be exceeded. Uncompressed stereo 16-bit, 44.1k requires 1411200
bytes/sec to transfer, only ~1.4x the available pipe, right? Why use 128
or 384kb/sec mp3 encoding/playback when we can have nearly a meg/sec?

It would seem to me (not having zipped up a .wav file in a _very_ long
time) that it should be somewhat possible to compress PCM audio by 30%
without losing a whole lot - perhaps even being able to reconstruct it in
its entirety at some later time?

Does the mp3 codec cover anything like this? If so, the encoding chip
itself might be able to handle it natively even...

Just an exhausted rambling on a Friday afternoon...

Matt



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