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Yalac - Comparisons, How the evaluation release compares to other compressors
TBeck
post Apr 10 2006, 07:30
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Content

In this thread the testers should post comparisons of the preset modes of Yalac (Working name for "Yet another lossless audio compressor") with other lossless compressors.

The results for specific variations of individual encoder options should go into the thread " Yalac Evaluation and optimization".

Guidelines

Please post the exact version number of the compressors. Compression ratio should be specified in percent of the uncompressed file size. Speed figures should be specified as multiple of real time (duration of the test files). A specification of your test system, especially the CPU, would be helpful.

Open end: Feel free to add more results later.

What happened

Bad timing of my introduction (April 1.) forced an early publication of an evaluation release of Yalac, to prove, that it really works. This are results of 8 forum members, who where so kind to test the experimental release for me.

Many thanks!

Goals

Yalac should finally achieve compression ratios on par with Monkey's Audio High. Decoding speed should be at least two times higher than Monkey and never be significantly lower than with FLAC (possibly Yalac will later be integrated into FLAC).

My next steps

The first results i have received from the testers show me some weaknesses of the encoder. That's a good thing, because that means, that there definitely is a chance to increase the compression efficiency! Same is true for the speed; especially the decoder is not fully optimized yet. But it will take some time, before i will come up with an optimized release.

Links to 24 bit files i have used

I think, they are hard to find.

CODE
44 KHz, 24 bit

mytek_8X96_24bit_web.wav
Mytek-stereo96adc_evans.wav
Mytek-stereo96adc_ravel.wav

Source: http://www.mytekdigital.com/compare/comparison1.htm

48 KHz, 24 bit

McDougalsMen24bit_48kHz.wav
sister24bit_48kHz.wav

Source: http://ff123.net/samples.html


Or make a better Google search. foosion shows you how: http://www.hydrogenaudio.org/forums/index....ndpost&p=381702

This post has been edited by TBeck: Apr 12 2006, 20:23
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Synthetic Soul
post May 5 2006, 21:10
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I'm not sure what the priority is for testing 0.06. Would we be comparing against other encoders, or is the idea that we simply run Yalac on numerous files using all its presets?

I'm quite happy to pass some batch files on if it will help people test, but I'm not sure the database I used in my initial test is adequate for this round of testing.

The way I see it, if we are simply testing how Yalac performs, we need to test a greater variety of files (mono; 24bit; etc). The database is only really set up to deal with 44.1KHz 16bit stereo files. If you consider what my pages detailed, it would really just be a table to show that fast is faster than normal, and high compresses better than normal. We know that already (well, we can assume).

Don't get me wrong, I think amalgamating the results is a great idea. Joseph Pohm and I have communicated regarding a similar thing. I think I'm being a little short-sighted and just need some help to understand how and what we would all be testing.


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TBeck
post May 5 2006, 22:18
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QUOTE (Synthetic Soul @ May 5 2006, 10:10 PM) *
I'm not sure what the priority is for testing 0.06. Would we be comparing against other encoders, or is the idea that we simply run Yalac on numerous files using all its presets?
...
The way I see it, if we are simply testing how Yalac performs, we need to test a greater variety of files (mono; 24bit; etc). The database is only really set up to deal with 44.1KHz 16bit stereo files. If you consider
...
Don't get me wrong, I think amalgamating the results is a great idea. Joseph Pohm and I have communicated regarding a similar thing. I think I'm being a little short-sighted and just need some help to understand how and what we would all be testing.

To be honest, i don't have an elaborated plan for test design beyond my current interests.

I did work on

- mainly speed optimizations
- improvements of my source code quality
- some slight compression improvements (found some opportunities while evaluating my source code).

Hence current tests should check

a) if the speed optimizations are present on different platforms (especially CPU's)
b) if the speed and source code optimizations didn't affect the reliability
c) if the changes made for the slight compression improvements don't hurt on other files.

For this purposes an evaluation based upon the existing test sets and a comparison with previous results would be quite helpful. For a) and b) the tests sets don't have to be really representative.

Most work for V0.07 will probably again consist of speed optimizations of the channel decorrelation. V0.06 brings algorithmic, V0.07 will bring assembler optimizations.

Reason: I want to improve the channel decorrelation in terms of compression efficiency. The current speed optimizations should guarantee, that later increases of the algorithm complexity will not hurt speed too much. And i really like Yalac to be fast... smile.gif

V0.08 should contain an improved channel decorrelation. Then it will be really useful to test it on heterogenous file sets to tweak it. Mono and 24-Bit files wouldn't be important here.

Besides testing for my development purposes i am surely interested into comparisons with other compressors! Why else should i look for some tenth of a percent better compression...

I hope this shows some direction for possible further testing.

Thomas

P.S.: Some time in the future i will activate my ominous pre filter, which gives up to 4 percent better compression on some rare problem files! But this one needs really much evaluation on big test sets.

This post has been edited by TBeck: May 5 2006, 22:24
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Posts in this topic
- TBeck   Yalac - Comparisons   Apr 10 2006, 07:30
- - Synthetic Soul   My results can be found at the following address: ...   Apr 11 2006, 18:05
|- - onthejazz   QUOTE (Synthetic Soul @ Apr 11 2006, 12:0...   Apr 12 2006, 04:52
- - Destroid   I had issues with the inability for Yalac to accep...   Apr 12 2006, 03:22
- - Synthetic Soul   Comparison now includes Yalac Fastest.Summary of e...   Apr 12 2006, 22:09
- - Destroid   These are benchmarks with Yalac 0.03 with two albu...   Apr 13 2006, 21:54
|- - TBeck   QUOTE (Destroid @ Apr 13 2006, 10:54 PM) ...   Apr 13 2006, 22:40
- - Destroid   Test #3 - LP recorded to cassette, includes vinyl ...   Apr 18 2006, 01:13
|- - Shade[ST]   Destroid's results prove that YALAC is the bes...   Apr 18 2006, 01:21
|- - Destroid   QUOTE ' date='Apr 18 2006, 12:21 AM' p...   Apr 18 2006, 02:56
- - Synthetic Soul   Garf posted some suggestions for "presets...   Apr 18 2006, 09:47
|- - Destroid   QUOTE (Synthetic Soul @ Apr 18 2006, 08:4...   Apr 18 2006, 11:09
|- - TBeck   QUOTE (Destroid @ Apr 18 2006, 12:09 PM) ...   Apr 18 2006, 11:23
|- - Destroid   QUOTE (TBeck @ Apr 18 2006, 10:23 AM) I a...   Apr 18 2006, 11:49
|- - pest   QUOTE My channel decorrelation obviously needs som...   Apr 18 2006, 12:23
- - vinnie97   I'm still waiting for something to beat LA...   Apr 18 2006, 10:13
- - Firon   I'm really impressed, the fast compression rat...   Apr 18 2006, 11:40
|- - TBeck   QUOTE (Firon @ Apr 18 2006, 12:40 PM) I...   Apr 18 2006, 11:47
- - JB_   Hello, its my 1st post here. Have you guys know th...   Apr 18 2006, 12:01
|- - [proxima]   QUOTE (JB_ @ Apr 18 2006, 01:01 PM) Have ...   Apr 18 2006, 12:18
|- - JB_   QUOTE TTA was considered in previous tests by guru...   Apr 18 2006, 16:31
- - Synthetic Soul   Following my comparison using 16bit 44.1KHz stereo...   Apr 18 2006, 12:11
|- - TBeck   QUOTE (Synthetic Soul @ Apr 18 2006, 01:1...   Apr 18 2006, 14:20
- - Synthetic Soul   Not especially. Is there a compelling reason to i...   Apr 18 2006, 16:42
- - Mo0zOoH   TBeck, Your compressor is actually a BOMB. Right ...   Apr 18 2006, 18:20
- - Synthetic Soul   Out of interest on my part TTA is now included whe...   Apr 18 2006, 18:49
|- - Shade[ST]   QUOTE (Synthetic Soul @ Apr 18 2006, 01:4...   Apr 18 2006, 19:13
- - Synthetic Soul   Yes, that would be possible. Another member previ...   Apr 18 2006, 22:06
|- - Shade[ST]   That second method is evaluating the compresser...   Apr 18 2006, 22:30
- - audiofreak   QUOTE ' date='Apr 18 2006, 02:13 PM' p...   Apr 19 2006, 00:43
|- - Shade[ST]   Good idea. Now make it   Apr 19 2006, 01:19
|- - audiofreak   QUOTE ' date='Apr 18 2006, 08:19 PM' p...   Apr 19 2006, 01:42
- - Synthetic Soul   Well, OK, if anyone can suggest an algorithm that ...   Apr 19 2006, 07:44
- - TBeck   Current Progress you may call it Tom's diary....   Apr 23 2006, 10:50
- - audiofreak   Moderation: Removed unnecessary quote This may so...   Apr 23 2006, 15:19
|- - TBeck   QUOTE (audiofreak @ Apr 23 2006, 04:19 PM...   Apr 24 2006, 02:43
- - Destroid   At last, the first set of monural instrument track...   Apr 24 2006, 18:11
- - TBeck   Current Progress (V0.05) In my last post i asked ...   Apr 26 2006, 04:31
- - Synthetic Soul   Cool, thanks for the update Thomas. I thought I s...   Apr 26 2006, 10:01
- - TBeck   V0.05 is done Changes: - Preset FASTEST is gone....   Apr 29 2006, 11:18
|- - boombaard   QUOTE (TBeck @ Apr 29 2006, 12:18 PM) V0....   Apr 29 2006, 22:58
- - guruboolez   I have a question, related to the fact that I have...   Apr 29 2006, 11:39
|- - Destroid   QUOTE (guruboolez @ Apr 29 2006, 10:39 AM...   Apr 29 2006, 22:29
- - Supacon   It's good to see that you're progressing r...   Apr 29 2006, 18:41
|- - TBeck   QUOTE (Supacon @ Apr 29 2006, 07:41 PM) B...   May 2 2006, 13:31
|- - Shade[ST]   Hello Thomas, Do you think you could slightly int...   May 2 2006, 15:07
|- - TBeck   QUOTE ' date='May 2 2006, 04:07 PM' po...   May 2 2006, 15:38
|- - Shade[ST]   That should be fine.. if no filename is listed, ma...   May 2 2006, 16:40
|- - TBeck   QUOTE ' date='May 2 2006, 05:40 PM' po...   May 2 2006, 16:58
|- - Shade[ST]   Maybe add a target directory option, so that the d...   May 2 2006, 18:23
- - Destroid   The speed up in high mode is there. CODE Occult - ...   Apr 30 2006, 03:07
|- - TBeck   QUOTE (Destroid @ Apr 30 2006, 04:07 AM) ...   May 2 2006, 13:07
- - Destroid   My $0.02 USD, I would like to avoid the wildc...   May 2 2006, 22:28
|- - Shade[ST]   In that case, (infile | --all) (compression option...   May 2 2006, 22:54
|- - TBeck   QUOTE (Destroid @ May 2 2006, 11:28 PM) M...   May 2 2006, 22:55
|- - Destroid   QUOTE Would it be ok for now, if the file extensio...   May 2 2006, 23:57
||- - Synthetic Soul   QUOTE (Destroid @ May 2 2006, 10:57 PM) T...   May 3 2006, 09:55
|- - Synthetic Soul   QUOTE (TBeck @ May 2 2006, 09:55 PM) Quic...   May 3 2006, 09:44
|- - TBeck   QUOTE (Synthetic Soul @ May 3 2006, 10:44...   May 3 2006, 14:25
- - TBeck   Current Progress (V0.06) Sorry if i should talk t...   May 5 2006, 12:28
|- - Shade[ST]   Take your time if you should wish to, but I don...   May 5 2006, 13:22
|- - TBeck   QUOTE ' date='May 5 2006, 02:22 PM' po...   May 5 2006, 13:56
- - Synthetic Soul   I'm not sure what the priority is for testing ...   May 5 2006, 21:10
|- - TBeck   QUOTE (Synthetic Soul @ May 5 2006, 10:10...   May 5 2006, 22:18
|- - Synthetic Soul   QUOTE (TBeck @ May 5 2006, 10:18 PM) Henc...   May 6 2006, 10:08
||- - Shade[ST]   @Synthetic soul : If you make your batch files ava...   May 6 2006, 16:37
|- - TBeck   QUOTE (TBeck @ May 5 2006, 23:18) Most wo...   May 10 2006, 13:21
- - TBeck   V0.06 is done Changes: Compression efficiency an...   May 12 2006, 15:37
|- - Shade[ST]   My exams are now done, I'd be glad to test the...   May 12 2006, 16:31
- - Shade[ST]   On SSE optimization : CODE=== New test ===========...   May 13 2006, 00:49
|- - TBeck   QUOTE ' date='May 13 2006, 01:49' post...   May 13 2006, 01:33
|- - Shade[ST]   It seems my disk caching is quite unstable, then. ...   May 13 2006, 01:48
|- - TBeck   QUOTE ' date='May 13 2006, 02:48' post...   May 13 2006, 01:54
|- - Shade[ST]   These results are actually quite surprising, as th...   May 13 2006, 02:06
|- - TBeck   QUOTE ' date='May 13 2006, 03:06' post...   May 13 2006, 02:29
|- - Shade[ST]   Do the rounding errors mean that the encoding may ...   May 13 2006, 02:38
||- - TBeck   QUOTE ' date='May 13 2006, 03:38' post...   May 13 2006, 02:46
|- - Hyp-X   QUOTE (TBeck @ May 13 2006, 02:29) I am q...   May 15 2006, 16:21
|- - TBeck   QUOTE (Hyp-X @ May 15 2006, 17:21) F...   May 15 2006, 16:33
- - Destroid   A quick comparison between the last two versions u...   May 13 2006, 02:51
|- - TBeck   QUOTE (Destroid @ May 13 2006, 03:51) A q...   May 13 2006, 03:03
- - Destroid   Oops, keep forgetting the sustem specs. I fixed th...   May 13 2006, 03:25
|- - TBeck   QUOTE (Destroid @ May 13 2006, 04:25) Oop...   May 13 2006, 03:33
- - Synthetic Soul   QUOTE (TBeck @ May 13 2006, 01:33) BTW: A...   May 13 2006, 08:03
|- - TBeck   QUOTE (Synthetic Soul @ May 13 2006, 09:0...   May 13 2006, 12:52
- - Synthetic Soul   I hacked the original comparison table to include ...   May 15 2006, 11:09
|- - TBeck   QUOTE (Synthetic Soul @ May 15 2006, 12:0...   May 15 2006, 12:52
|- - TBeck   QUOTE (Synthetic Soul @ May 15 2006, 12:0...   May 15 2006, 13:41
|- - Synthetic Soul   QUOTE (TBeck @ May 15 2006, 13:41) Would ...   May 15 2006, 15:26
|- - TBeck   QUOTE (Synthetic Soul @ May 15 2006, 16:2...   May 15 2006, 15:57
- - Synthetic Soul   Yes, Fast is truely impressive. In the encoder se...   May 15 2006, 16:09
|- - TBeck   QUOTE (Synthetic Soul @ May 15 2006, 17:0...   May 15 2006, 16:17
|- - Synthetic Soul   QUOTE (Synthetic Soul @ May 15 2006, 16:0...   May 15 2006, 18:35
- - Firon   Fast mode is quite impressive in ratio and speed, ...   May 15 2006, 18:53
|- - TBeck   QUOTE (Firon @ May 15 2006, 19:53) Fast m...   May 15 2006, 19:45
- - Synthetic Soul   I have just checked the MD5 hash of all decoded fi...   May 15 2006, 22:20
- - audiofreak   QUOTE (TBeck @ May 15 2006, 14:45) QUOTE ...   May 16 2006, 03:14
- - TBeck   QUOTE (audiofreak @ May 16 2006, 04:14) P...   May 17 2006, 02:57
- - Shade[ST]   QUOTE (TBeck @ May 16 2006, 21:57) BTW: W...   May 17 2006, 05:58
- - Destroid   I agree the speed aspect is a Yalac specialty. Si...   May 17 2006, 20:21
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