Rockbox mail archive
Subject: Re: Back to wav
From: Brent Roberts (linuxbrent_at_yahoo.com)
Monkey's Audio Compressor gets about 50% compression.
It's probably the best out there.
It's open-source, but the license is restrictive.
pkzip compression is nothing like the MAC format,
which still takes some amount of processing power to
What about the fact that the archos chokes on only
384kbps? (Or so I hear...)
Anyway, there is a Winamp MAC decoder, so it is sort
of a streaming format.
--- Matt.OReilly_at_wachovia.com wrote:
> 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...
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Page was last modified "Jan 10 2012" The Rockbox Crew