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WavPack VBR (quality oriented) mode
softrunner
post Mar 22 2013, 03:34
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bryant, are you going to implement some quality mode in WavPack? Three years ago you wrote: "I would someday like to add a VBR “quality based” mode to WavPack hybrid (which would counter one advantage of LossyWAV)". Maybe the time for it has come? I do not see, how it is possible to be satisfied with ABR, because for some files 192 kbps is enough, and some needs 400+ kbps. Using 400+ kbps for all files hits file size, while using lower bitrate hits quality.
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shadowking
post Mar 24 2013, 09:55
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I would like this too. I still think you will end up with 350..400k for normal signals but critical signals could get a lot more. Moreover, quality differences between the modes will be eliminated.

ABR is less flexible but not really worse than VBR in the higher bitrates. As you said 400+k would suffice but is wasteful. For lossywav I find that without noise shaping you also need a similar rate and 350k at the very least. I think with these codecs to cannot achieve consistently good quality and make it alternative to the TC: you need double the rate - 300k or more.

Currently I find a setting of -b4 -x5 to be sufficient so far on my collection of 400 cd's. This yields 370k on average.


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softrunner
post Mar 25 2013, 03:22
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QUOTE (shadowking @ Mar 24 2013, 12:55) *
Currently I find a setting of -b4 -x5 to be sufficient so far on my collection of 400 cd's. This yields 370k on average.

Do you remove .wvc files (permanently)?

This post has been edited by softrunner: Mar 25 2013, 03:22
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shadowking
post Mar 31 2013, 06:34
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QUOTE (softrunner @ Mar 25 2013, 13:22) *
QUOTE (shadowking @ Mar 24 2013, 12:55) *
Currently I find a setting of -b4 -x5 to be sufficient so far on my collection of 400 cd's. This yields 370k on average.

Do you remove .wvc files (permanently)?


I would too. But keeping them is not always for quality reasons. It just adds flexibility . One thing is that these days I am against using the -hh or even -h for lossy mode as I find a normal mode + -x to work better without altering decoding speed. I still have old encodes with -hh and cannot reverse it.

I find it easy to move the correction files to a zip archive dump that file offline.

I don't think one has to distrust ABR. Its true that a proper tuned VBR is ideal, but the current system is also safe even for high demand using -b350x5 . The -x and -dns are doing constant analysis to prevent quality from falling too much. So there is a very basic 'psymodel' in place.


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Posts in this topic
- softrunner   WavPack VBR (quality oriented) mode   Mar 22 2013, 03:34
- - shadowking   I would like this too. I still think you will end ...   Mar 24 2013, 09:55
|- - softrunner   QUOTE (shadowking @ Mar 24 2013, 12:55) C...   Mar 25 2013, 03:22
|- - shadowking   QUOTE (softrunner @ Mar 25 2013, 13:22) Q...   Mar 28 2013, 11:06
|- - shadowking   QUOTE (softrunner @ Mar 25 2013, 13:22) Q...   Mar 31 2013, 06:34
- - darkbyte   Although i'm testing Opus nowadays for portabl...   Mar 24 2013, 17:35
- - bryant   I still would like to work on this as an enhanceme...   Mar 28 2013, 06:36
- - softrunner   QUOTE (bryant @ Mar 28 2013, 09:36) I sti...   Mar 30 2013, 15:02
- - shadowking   Perhaps making an experimental encoder using simpl...   Mar 31 2013, 06:05
- - shadowking   I've experimented further this time with the a...   Jul 31 2013, 15:54
|- - bryant   QUOTE (shadowking @ Jul 31 2013, 07:54) I...   Aug 3 2013, 22:22
- - shadowking   I did some more tests. --blocksize=4410 adds 6 /8 ...   Aug 4 2013, 14:31
|- - DARcode   QUOTE (shadowking @ Aug 4 2013, 14:31) At...   Aug 11 2013, 13:14
|- - shadowking   QUOTE (DARcode @ Aug 11 2013, 22:14) QUOT...   Aug 20 2013, 03:24
- - darkbyte   I wonder if it's feasible to achieve good qual...   Aug 18 2013, 21:24
- - shadowking   I think quality should be excellent down to 285k a...   Aug 19 2013, 04:31
- - darkbyte   I'll give it a try, thanks. I know the genera...   Aug 19 2013, 12:52
|- - shadowking   QUOTE (darkbyte @ Aug 19 2013, 21:52) I...   Aug 20 2013, 03:41
- - DARcode   @darkbyte: As mentioned in my previous post I use ...   Aug 19 2013, 14:10
- - darkbyte   Thanks DARcode! I'll give it a try Not c...   Aug 19 2013, 20:37
- - shadowking   Ok I tested atemlied and other problem samples ove...   Sep 4 2013, 10:04
- - DARcode   Thank you very much shadowking, appreciated. Now l...   Sep 4 2013, 17:19
- - shadowking   The 30kbit difference is around 2db noise. That co...   Sep 15 2013, 04:30
- - darkbyte   Compression speed with b380hhx6 is very slow so i...   Oct 29 2013, 17:24
|- - shadowking   QUOTE (darkbyte @ Oct 30 2013, 03:24) Com...   Nov 7 2013, 12:05
|- - darkbyte   QUOTE (shadowking @ Nov 7 2013, 14:05) I ...   Nov 7 2013, 22:23
- - bryant   I would not presume to speak for shadowking, but m...   Oct 31 2013, 00:31
|- - darkbyte   QUOTE (bryant @ Oct 31 2013, 02:31) The “...   Oct 31 2013, 08:49
- - shadowking   I tested atemlied at lower bitrate using -hhx4. T...   Nov 7 2013, 11:35
- - includemeout   QUOTE (shadowking @ Nov 7 2013, 08:35) I ...   Dec 27 2013, 11:57
- - includemeout   QUOTE (darkbyte @ Nov 7 2013, 19:23) [*]T...   Dec 27 2013, 12:02
|- - bryant   QUOTE (includemeout @ Dec 27 2013, 03:02)...   Dec 28 2013, 19:34
- - DARcode   I'll stick with my über paranoid x6, and it...   Dec 30 2013, 15:09
- - shadowking   I've done more testing to try to get a good co...   Jan 16 2014, 12:31
|- - bryant   QUOTE (shadowking @ Jan 16 2014, 03:31) I...   Jan 19 2014, 01:46
- - DARcode   Very interesting indeed, keep it up sk !   Jan 16 2014, 20:27
- - includemeout   QUOTE (shadowking @ Jan 16 2014, 09:31) I...   Jan 16 2014, 23:44
|- - bryant   QUOTE (includemeout @ Jan 16 2014, 14:44)...   Jan 19 2014, 01:49
|- - includemeout   Thanks Bryant. Though it's a very fine expla...   Jan 19 2014, 13:25
|- - bryant   QUOTE (includemeout @ Jan 19 2014, 04:25)...   Jan 19 2014, 19:09
- - includemeout   Those spectrum analyses surely tell us a lot. No...   Jan 20 2014, 00:15
- - darkbyte   Does resampling the CD audio input before encoding...   Jan 27 2014, 19:03
|- - saratoga   QUOTE (darkbyte @ Jan 27 2014, 13:03) Doe...   Jan 27 2014, 19:13
- - includemeout   If memory doesn't fail me, doesn't WavPack...   Jan 27 2014, 20:02
- - bryant   QUOTE (includemeout @ Jan 27 2014, 11:02)...   Jan 27 2014, 20:53


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