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Comparison : 24bit/192KHz/stereo FLAC vs. APE, How can it be ?
foorious
post Jul 25 2008, 16:55
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Hi everybody,

I've just made a small comparison between Monkey's Audio 3.99 (Extra High Compression) and FLAC 1.21 (Compression level 8 ), using 24bit/192KHz/stereo files (the files were generated from a vinyl rip).

Of course I expected APE to perform slightly better than FLAC, like it usually does for 16bit/44KHz/stereo files (2-3%, maybe even 5%)... but I didn't really expect this ! blink.gif



Take a look at all the file sizes : we're talking about 20% difference here ! The total file size is 1,53 Go for APE vs. 1,88 Go for FLAC.

So I don't understand. I'm a genuine FLAC enthusiast (all my files are FLAC), but... how can it be ? Is there something wrong here ? Can we do something to improve all the FLAC file sizes ?

Thanks in advance for your explanation. smile.gif
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SebastianG
post Aug 16 2008, 11:12
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"[...] but if someone has time to try out sebastian's ideas I would be open to incorporating improvements into the encoder."

"[...] Still, this lattice quantization problem is kind of intriguing. [...]"


Just in case anyone works on this: I sent Josh and Justin some C89 source code. It's able to compute approximations and the actual optimal set of quantized LP coefficients given a desired filter order and LP coefficient accuracy.

edit: Since Josh and Justin might not have enough time at their hands to incorporate this in its current form I'm willing to share the source code with others, too (simplified BSD license).

Cheers,
SG

This post has been edited by SebastianG: Aug 16 2008, 11:32
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Posts in this topic
- foorious   Comparison : 24bit/192KHz/stereo FLAC vs. APE   Jul 25 2008, 16:55
- - viniciusferrao   MonkeyAudio do not support 192kHz! :confused: ...   Jul 26 2008, 00:47
|- - Curtor   QUOTE (viniciusferrao @ Jul 25 2008, 17:4...   Jul 26 2008, 02:38
|- - pawelq   QUOTE (Curtor @ Jul 25 2008, 21:38) From ...   Jul 28 2008, 15:25
- - Axon   My understanding is that the lowest 8-12 bits of a...   Jul 26 2008, 00:51
|- - Nick.C   QUOTE (Axon @ Jul 26 2008, 00:51) My unde...   Jul 27 2008, 17:22
- - TBeck   QUOTE (foorious @ Jul 25 2008, 16:55) Tak...   Jul 27 2008, 04:48
- - foorious   Thanks everyone for all your interesting answers. ...   Jul 27 2008, 16:38
|- - Dynamic   QUOTE (foorious @ Jul 27 2008, 16:38) Oh,...   Jul 27 2008, 18:36
||- - Nick.C   QUOTE (Dynamic @ Jul 27 2008, 18:36) In c...   Jul 27 2008, 20:30
||- - GeSomeone   QUOTE (Nick.C @ Jul 27 2008, 21:30) 24/44...   Jul 28 2008, 09:17
||- - DARcode   QUOTE (GeSomeone @ Jul 28 2008, 10:17) QU...   Jul 28 2008, 11:42
||- - TBeck   QUOTE (GeSomeone @ Jul 28 2008, 09:17) If...   Jul 28 2008, 18:04
|||- - bryant   QUOTE (TBeck @ Jul 28 2008, 10:04) QUOTE ...   Jul 29 2008, 17:17
|||- - TBeck   QUOTE (bryant @ Jul 29 2008, 17:17) Thank...   Jul 29 2008, 20:01
|||- - bryant   QUOTE (TBeck @ Jul 29 2008, 12:01) QUOTE ...   Jul 30 2008, 05:33
|||- - TBeck   QUOTE (bryant @ Jul 30 2008, 05:33) So, f...   Jul 31 2008, 13:01
||- - Dynamic   QUOTE (GeSomeone @ Jul 28 2008, 09:17) Se...   Jul 28 2008, 19:46
|- - TBeck   QUOTE (foorious @ Jul 27 2008, 16:38) Oh,...   Jul 27 2008, 18:53
- - Enig123   I think "anything" here just means no pa...   Jul 28 2008, 15:34
- - pdq   If you treat the data as simply a series of values...   Jul 28 2008, 16:23
- - SebastianG   This is in response to the original question. FLA...   Jul 28 2008, 18:36
- - TBeck   QUOTE (TBeck @ Jul 29 2008, 20:01) Seems ...   Jul 29 2008, 21:49
- - vpa   Could you test TTA too? It's very quick but gi...   Jul 30 2008, 18:39
|- - TBeck   QUOTE (vpa @ Jul 30 2008, 18:39) Could yo...   Jul 30 2008, 19:28
- - foorious   Just a simple question : do TAK, APE and Optimfrog...   Jul 31 2008, 17:49
|- - vpa   QUOTE (foorious @ Jul 31 2008, 18:49) BTW...   Jul 31 2008, 18:13
|- - GeSomeone   QUOTE (foorious @ Jul 31 2008, 18:49) I...   Aug 11 2008, 22:56
|- - TBeck   QUOTE (GeSomeone @ Aug 11 2008, 22:56) @T...   Aug 14 2008, 12:44
|- - TBeck   QUOTE (TBeck @ Aug 14 2008, 12:44) I am s...   Aug 14 2008, 18:54
|- - GeSomeone   QUOTE (TBeck @ Aug 14 2008, 19:54) But wh...   Aug 15 2008, 13:19
|- - TBeck   QUOTE (GeSomeone @ Aug 15 2008, 13:19) QU...   Aug 15 2008, 15:19
- - foorious   Yes GeSomeone, no problem, my question was only ab...   Aug 13 2008, 11:51
- - jcoalson   sorry, been traveling a lot lately... it's har...   Aug 13 2008, 21:51
- - foorious   Hi josh, thanks for joining in. I understand your...   Aug 13 2008, 23:53
- - SebastianG   I actually tested some LP coefficient quantization...   Aug 14 2008, 09:24
- - SebastianG   "[...] but if someone has time to try out seb...   Aug 16 2008, 11:12
- - foorious   Are there any upcoming developments on this matter...   Sep 17 2008, 22:58
|- - jcoalson   QUOTE (foorious @ Sep 17 2008, 16:58) Are...   Sep 24 2008, 06:33
- - hidn   i encode my cd. flac compression is close to anoth...   Sep 24 2008, 05:58
- - foorious   Thanks Josh. I just hope you'll keep an eye on...   Sep 26 2008, 00:55
- - foorious   Hi there, are there any news on this matter ? It...   Mar 25 2009, 00:34
- - ktf   I just noticed the last SVN Flake is on par with M...   May 19 2009, 18:36


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