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#47603 - 21/11/2001 13:55 Lossless codecs
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
Now that we have WAV support, I was wondering if there was any thought to implementing some lossless codecs, such as FLAC, LPAC, Monkey's Audio, etc.
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Bitt Faulk

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#47604 - 21/11/2001 18:18 Re: Lossless codecs [Re: wfaulk]
Terminator
old hand

Registered: 12/01/2000
Posts: 1079
Loc: Dallas, TX
Complain to ARM that we need one :-)

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#47605 - 21/11/2001 19:54 Re: Lossless codecs [Re: wfaulk]
borislav
addict

Registered: 30/04/2000
Posts: 420
Loc: Sunnyvale, CA, USA
Now that we have WAV support, I was wondering if there was any thought to implementing some lossless codecs, such as FLAC, LPAC, Monkey's Audio, etc.

Some thought, yes, but not much more than that. I've looked at FLAC - the reference decoder is in integer-only C, so it should be fairly easy (for empeg) to integrate it with the player. The lack of plugin support in the player makes this hard as a third-party project but is in theory possible with on-the-fly translation to WAV.

Borislav

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#47606 - 22/11/2001 06:43 Re: Lossless codecs [Re: wfaulk]
BartDG
carpal tunnel

Registered: 20/05/2001
Posts: 2616
Loc: Bruges, Belgium
I've looked into those lossless compression ratios but haven't found the thing that interested me the most : what is the compression ratio?? With mp3 @ 128 it's about 1/12, @ 192 it's about 1/8.

What's it like for those lossless codecs?
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Riocar 80gig S/N : 010101580 red
Riocar 80gig (010102106) - backup

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#47607 - 22/11/2001 06:53 Re: Lossless codecs [Re: BartDG]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
As with most lossless compression algorithms, it's not static. It depends largely on the input. There's a comparison chart, though, that should give you some general ideas. It's far from MP3 or Ogg levels.
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Bitt Faulk

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#47608 - 23/11/2001 16:28 Re: Lossless codecs [Re: wfaulk]
hybrid8
carpal tunnel

Registered: 12/11/2001
Posts: 7738
Loc: Toronto, CANADA
An average of just over 50% is pretty damn good. You're not compressing something as repeatable as text after all. I think these compressors will start to play very big roles as broadband speeds increase and as recording media increases in density. I've already seen quotes of 200GB for 2.5" drives and over 400GB for 3.5" desktop drives for 2003. Transfer speeds and interfaces are going to start to become a big bottle neck at that point. :)

Bruno
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Bruno
Twisted Melon : Fine Mac OS Software

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#47609 - 24/11/2001 02:46 Re: Lossless codecs [Re: hybrid8]
BartDG
carpal tunnel

Registered: 20/05/2001
Posts: 2616
Loc: Bruges, Belgium
...and then they'll just find a new way of going about it, like they always have...
_________________________
Riocar 80gig S/N : 010101580 red
Riocar 80gig (010102106) - backup

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