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Lame3.99.5y, A 3.99.5 functional extension
halb27
post Mar 18 2012, 11:12
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You can download it from here.

What’s the functional extension?

It offers a VBR quality setting -V0+.

-V0+ is -V0 with extra properties. These properties can improve upon difficult-to-encode spots in the music like temporal smearing issues as with problem sample eig or with tremolo problem isues as with problem sample lead-voice. eig and lead-voice are fine to me when using -V0+.

How is it done?

-V0+ uses a strategy which is targeting at providing maximum possible audio data space for hard-to-encode spots in the music. -V0+ increases the accuracy demands for spots in the music with detected impulses, and it has a general demand for audio data bitrate to stay rather high.

What’s the price to pay?

Average bitrate goes up a little bit. For my standard test set of various pop music average bitrate is 256 kbps with -V0+, whereas -V0 takes 252 kbps.
Moreover, in order to prevent another 10 kbps increase in average bitrate, the fast and lossless mp3packer procedure is recommended to be called for the produced mp3 file. Used with a bat file invoked from the explorer’s folder context menu this is comfortably done for the mp3 files of an entire folder.
The 10 kbps bitrate bloat is a consequence of the strategy for providing maximum possible data space. For doing so a 17.5 kHz lowpass is also used internally. If you don’t like that use a lowpass according to your likings. But even if you are able to distinguish higher frequencies in an isolated listening test, this doesn’t mean you can take profit of that with real life music. Not talking about the fact that the musical contents of higher frequncies is next to nothing.

This post has been edited by halb27: Mar 18 2012, 11:37


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lame3100m --bCVBR 300
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halb27
post Apr 18 2012, 00:50
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Using a higher lowpass frequency has an effect on bitrate, but not to this extent.
Main reason for very high average bitrate is a high percentage of short blocks used. 3.99.5y -V0+ tries to encode them with the maximum accuracy possible.

This post has been edited by halb27: Apr 18 2012, 00:51


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IgorC
post Apr 18 2012, 02:53
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QUOTE (halb27 @ Apr 17 2012, 20:50) *
Main reason for very high average bitrate is a high percentage of short blocks used. 3.99.5y -V0+ tries to encode them with the maximum accuracy possible.

There is no more obvious artefact than pre-echo is for MP3 at high bitrates (~256 kbps, eig and castanets ). So I'm totally agree that switching to short blocks is the effective (if not the most effective) remedy.
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Posts in this topic
- halb27   Lame3.99.5y   Mar 18 2012, 11:12
- - halb27   Some remarks about ‘why a new variant after 3.99.5...   Mar 18 2012, 11:13
|- - GeSomeone   QUOTE (halb27 @ Mar 18 2012, 12:13) As a ...   Mar 19 2012, 00:22
- - halb27   -V0+ is now more or less what was -V1+ before, add...   Mar 19 2012, 08:08
- - ggunnell   I use dbPoweramp as a Lame front end. Currently d...   Apr 14 2012, 21:25
|- - chi   QUOTE (ggunnell @ Apr 14 2012, 22:25) …, ...   Apr 15 2012, 05:53
- - halb27   I can confirm your idea and chi's result. For ...   Apr 15 2012, 09:43
|- - ggunnell   QUOTE (halb27 @ Apr 15 2012, 03:43) I can...   Apr 15 2012, 17:15
- - halb27   So you compiled both Lame 3.99.5 and 3.99.5y yours...   Apr 15 2012, 20:20
|- - ggunnell   QUOTE (halb27 @ Apr 15 2012, 14:20) So yo...   Apr 16 2012, 05:57
- - ShotCaller   halb, seeing that -V0+ tends to be in the 300+ kbp...   Apr 16 2012, 05:40
|- - halb27   QUOTE (ShotCaller @ Apr 16 2012, 05:40) h...   Apr 16 2012, 07:31
|- - skamp   QUOTE (halb27 @ Apr 16 2012, 08:31) An op...   Apr 16 2012, 07:39
||- - halb27   QUOTE (skamp @ Apr 16 2012, 07:39) QUOTE ...   Apr 16 2012, 07:54
||- - soundping   QUOTE (skamp @ Apr 16 2012, 01:39) QUOTE ...   Apr 16 2012, 21:22
|- - GeSomeone   QUOTE (halb27 @ Apr 16 2012, 08:31) 3.99....   Apr 18 2012, 00:37
- - halb27   That's why freeformat isn't of practical u...   Apr 16 2012, 23:08
- - naturfreak   A simple question to satisfy my curioustiy: Will ...   Apr 17 2012, 14:06
- - halb27   I welcome this, but it's up to the Lame devs.   Apr 17 2012, 19:28
- - halb27   Using a higher lowpass frequency has an effect on ...   Apr 18 2012, 00:50
|- - IgorC   QUOTE (halb27 @ Apr 17 2012, 20:50) Main ...   Apr 18 2012, 02:53
- - halb27   Big trouble! I managed to put a premature ver...   Sep 8 2012, 19:46
- - goa pride   QUOTE (halb27 @ Sep 8 2012, 19:46) Big tr...   Sep 9 2012, 21:37
- - Dynamic   QUOTE (goa pride @ Sep 9 2012, 21:37) is ...   Sep 9 2012, 22:37
|- - Dynamic   QUOTE (Dynamic @ Sep 9 2012, 22:37) Come ...   Sep 10 2012, 17:57
- - halb27   QUOTE (goa pride @ Sep 9 2012, 22:37) is ...   Sep 9 2012, 23:29


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