Yalac - Comparisons, How the evaluation release compares to other compressors Options

[TBeck]

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

[Destroid]

These are benchmarks with Yalac 0.03 with two albums (EAC CDImage file). The first album is rock recording that was remastered and represents modern, heavily compressed albums. The second is an un-remasted pop/rock album.

Notice that the behavior of each codec on different types albums affect both compression ratio and processing time:

CODE

Slayer - South of Heaven (remaster) 390,702,524 bytes duration 36:54
=======================================================================
name/params Ratio EncTime DecTime
--------------------- ------ ------ ------
Yalac 0.03 fastest 74.20% 44.92x 66.64x
Yalac 0.03 fast 73.61% 37.91x 66.06x
MAC 4.01 beta2 -c1000 74.34% 63.26x 48.13x
FLAC 1.1.2 --fast 79.47% 65.12x 67.09x
WavPack 4.3 -f 76.73% 63.26x 60.81x
OFR 4.520 --mode fast 73.60% 23.55x 35.14x
--------------------- ------ ------ ------
Yalac 0.03 normal 73.33% 24.47x 66.90x
MAC 4.01 beta2 -c2000 73.14% 48.13x 41.77x
FLAC 1.1.2 (default) 75.70% 51.49x 65.12x
WavPack 4.3 (default) 75.42% 58.26x 61.50x
OFR 4.520 (default) 73.00% 16.65x 24.60x
LA 0.4 normal 71.65% 5.93x 7.72x
TTA 3.3 (default) 74.78% 55.68x 55.52x
--------------------- ------ ------ ------
Yalac 0.03 high 73.14% 7.30x 67.62x
MAC 4.01 beta2 -c3000 72.88% 41.93x 37.85x
FLAC 1.1.2 --best 75.49% 11.78x 67.09x
WavPack 4.3 -h 73.82% 44.61x 53.92x
OFR 4.520 --mode high 72.77% 11.41x 16.65x
LA 0.4 high 71.52% 4.44x 5.38x
--------------------- ------ ------ ------

CODE

The Police - Synchonicity (1983) 471,176,204 bytes duration 44:31
=====================================================================
name/params Ratio EncTime DecTime
------------------ ------ ------ ------
Yalac 0.03 fastest 51.44% 49.25x 76.49x
Yalac 0.03 fast 50.73% 39.84x 82.54x
MAC 4.01 beta2 -c1000 51.46% 66.94x 53.85x
FLAC 1.1.2 --fast 58.43% 74.19x 78.56x
WavPack 4.3 -f 53.29% 73.52x 76.86x
OFR 4.520 --mode fast 50.76% 23.43x 35.61x
--------------------- ------ ------ ------
Yalac 0.03 normal 50.34% 25.45x 71.72x
MAC 4.01 beta2 -c2000 49.88% 50.01x 44.08x
FLAC 1.1.2 (default) 52.92% 56.83x 78.56x
WavPack 4.3 (default) 52.22% 67.95x 75.10x
OFR 4.520 (default) 49.73% 17.12x 25.44x
LA 0.4 (normal) 48.42% 6.04x 7.94x
TTA 3.3 (default) 51.05% 65.77x 57.87x
--------------------- ------ ------ ------
Yalac 0.03 high 50.12% 7.22x 79.10x
MAC 4.01 beta2 -c3000 49.57% 42.80x 39.87x
FLAC 1.1.2 --best 52.63% 12.20x 78.56x
WavPack 4.3 -h 50.61% 48.44x 64.41x
OFR 4.520 --mode high 49.38% 11.77x 16.59x
LA 0.4 -high 48.23% 4.54x 5.48x
--------------------- ------ ------ ------

Yalac already has great performance and ratio. It would be interesting to see if the encoding time can be further optimized

edit: added LA scores, not interesting since it usually gets the best ratio, is extremely slow and it crashed
edit2: added TTA scores

This post has been edited by Destroid: Apr 24 2006, 17:52

[TBeck]

Yalac already has great performance and ratio. It would be interesting to see if the encoding time can be further optimized

Many thanks!

I will work on the speed of the HIGH preset later. I would like it to be only two times slower than NORMAL.

Thomas