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Opus 1.1a BABYEATER build
NullC
post Feb 11 2013, 21:51
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Ever mindful of the world's population problems, the Opus development team is excited to present a new highly experimental build of Opus which is expected to eat 100% more babies than prior editions. It is also expected have (potentially) improved transient handling performance:

https://people.xiph.org/~greg/opus-tools_ba...ater-deluxe.zip (Edit: replaced with updated version, see below)

What this does is adapts the frame-size dynamically based on transient analysis prior to encoding. Leave the opus-tools framesize knob alone (in this test build it controls the amount of look-ahead used for the analysis, and 60ms is the default and only tested value).

It would be super-helpful to compare this with the regular 1.1 alpha at various rates and point us to any interesting results you find (e.g. where it does obviously worse or better, or where it catches fire and/or eats household pets instead of babies). Obviously you shouldn't be encoding your music archives with this stuff yet.

This post has been edited by NullC: Feb 13 2013, 01:07
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RobertM
post Feb 28 2013, 09:36
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I think I've noticed a minor issue in the encoder, but I'm not familiar enough with the tech to understand exactly why it happens. See the attached files for an example. I created the sound a long time ago so it's not copyright in any way.

Sample 1: The 44.1kHz wav file shows some distortion in the output .opus file (and .wav file when decoded).

Sample 2: When the same original wav file from Sample 1 is first resampled to 48kHz using a different tool (Audacity), the encoded result sounds basically perfect, except for a small click at the beginning, but I suspect that's due to my player - the decoded wav output has no click.


Is this related to the resampler in the Opus encoder?


Edit: Updated attachment

This post has been edited by RobertM: Feb 28 2013, 10:25
Attached File(s)
Attached File  Issue1.zip ( 654.96K ) Number of downloads: 69
 
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Posts in this topic
- NullC   Opus 1.1a BABYEATER build   Feb 11 2013, 21:51
- - C.R.Helmrich   QUOTE (NullC @ Feb 11 2013, 21:51) What t...   Feb 11 2013, 22:57
|- - jmvalin   QUOTE (C.R.Helmrich @ Feb 11 2013, 16:57)...   Feb 11 2013, 23:24
|- - NullC   QUOTE (jmvalin @ Feb 11 2013, 14:24) (unl...   Feb 12 2013, 00:46
- - IgorC   eig sample has the issue. _http://depositfiles.or...   Feb 12 2013, 09:45
- - Gainless   At 192 kbps it does slightly better at this sample...   Feb 12 2013, 12:52
|- - NullC   QUOTE (Gainless @ Feb 12 2013, 03:52) The...   Feb 13 2013, 01:16
|- - Gainless   QUOTE (jmvalin @ Feb 12 2013, 23:23) OK, ...   Feb 13 2013, 21:54
|- - jmvalin   QUOTE (Gainless @ Feb 13 2013, 15:54) 192...   Feb 13 2013, 22:17
|- - Gainless   QUOTE (jmvalin @ Feb 13 2013, 22:17) QUOT...   Feb 14 2013, 13:35
|- - jmvalin   QUOTE (Gainless @ Feb 14 2013, 07:35) Sur...   Feb 14 2013, 20:00
|- - Gainless   QUOTE (jmvalin @ Feb 14 2013, 20:00) That...   Feb 15 2013, 20:42
|- - jmvalin   QUOTE (Gainless @ Feb 15 2013, 14:42) It...   Feb 16 2013, 04:58
|- - Gainless   QUOTE (jmvalin @ Feb 16 2013, 04:58) QUOT...   Feb 16 2013, 11:56
|- - jmvalin   QUOTE (Gainless @ Feb 16 2013, 05:56) QUO...   Feb 16 2013, 19:42
- - jmvalin   OK, I was able to identify at least one bug. See i...   Feb 12 2013, 23:23
- - IgorC   It's getting better http://pastebin.com/KGLCy...   Feb 12 2013, 23:51
- - Gainless   That's nice to hear, would be great if it coul...   Feb 16 2013, 20:40
|- - jmvalin   QUOTE (Gainless @ Feb 16 2013, 14:40) Tha...   Feb 18 2013, 06:43
- - Gainless   Sound both pretty transparent, thanks for the effo...   Feb 18 2013, 22:12
|- - jmvalin   QUOTE (Gainless @ Feb 18 2013, 16:12) Sou...   Feb 18 2013, 23:53
- - Omicron   Hello! I have some files: original wav 16khz u...   Feb 21 2013, 13:01
- - RobertM   QUOTE (Omicron @ Feb 21 2013, 22:01) Hell...   Feb 25 2013, 11:21
- - RobertM   I'm not a listening expert. However, I was int...   Feb 25 2013, 12:13
|- - RobertM   The samples encoded with the latest Opus version a...   Feb 26 2013, 06:55
- - Omicron   QUOTE what kind of problems did you hear? It soun...   Feb 26 2013, 23:10
- - RobertM   I think I've noticed a minor issue in the enco...   Feb 28 2013, 09:36
- - Gainless   Another sample making issues: DWK Sample A sweepin...   Apr 8 2013, 14:14
- - jensend   I can't reproduce your problem on mainline bui...   Apr 8 2013, 17:16
|- - jmvalin   QUOTE (jensend @ Apr 8 2013, 12:16) jmval...   Apr 8 2013, 18:20
||- - jensend   QUOTE (jmvalin @ Apr 8 2013, 11:20) Actua...   Apr 8 2013, 22:41
||- - jmvalin   QUOTE (jensend @ Apr 8 2013, 17:41) QUOTE...   Apr 9 2013, 03:21
|- - Gainless   QUOTE (jensend @ Apr 8 2013, 18:16) I can...   Apr 8 2013, 18:39
- - db1989   The above post has been moved from the associated ...   Apr 8 2013, 17:32
- - IgorC   The version 1.1a is the last testing build that wo...   Apr 8 2013, 19:05


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