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Fraunhofer has begun marketing HD-AAC, ISO MPEG-4 AAC-LC & SLS
rpp3po
post Jan 10 2010, 20:35
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Fraunhofer IIS just presented HD-AAC at the Consumer Electronics Show in Las Vegas. It's a hybrid format which can be played back as conventional AAC on legacy devices. HD-AAC capable devices also read the SLS layer and get a lossless reconstruction of the original signal.

More details here.

MPEG-4 SLS is not really news, but Fraunhofer finally seems to be pushing this out to a broader public now. Decoders are supposed to be ready within 12 weeks for literally all current (mobile and stationary) hardware platforms.

Seems to be a great product, I hope Apple picks this up!

It's probably not necessarily better than other hybrid solutions. But it would be nice if it got enough momentum to be implemented into the top line of mobile players and their ecosystems. For example, if you would be able buy HD-AAC in the iTMS and then let it copy just the AAC-LC part to your iPod.

This post has been edited by rpp3po: Jan 10 2010, 22:35
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darkbyte
post Nov 27 2011, 18:08
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I hope that the command line encoder gets updated for HD-AAC support in the near future.
menno: Can we get an estimate about this? We are eagerly waiting for it smile.gif

I guess foobar2000 and/or Winamp doesn't support HD-AAC out of the box so we have to wait for a decoder update there also.

I'm in the middle of a dillema to convert my collection of FLAC's into a hybrid format because i like to keep the lossless base but i'm also listening to a lots of music on my portable player where the lossless version is an overkill. And i don't like to organise the same files both in lossless and lossy format. There's actually three choices at the moment:

- WavPack: this works already, but the lossy filesizes are imo a bit too big for portable use (if i go with the recommended 384kbps setting). I've tried 256kbps but i can hear the added hiss what the lossy mode produces, mostly with electronic music. Maybe it could better if lossyWAV and WavPack gets integrated more tightly.

- mp3HD: you can do this already because there's a command line encoder in the Fraunhofer package. However it would be better to use LAME as the base mp3 encoder (better VBR quality), but i guess this'll never happen because the closed technical details. Also currently most of the players destroying the correction data on an ID3v2 tag rewrite which is sad. Even the format is not too fortunate because the correction part is stored in the tags so the upper limit is 256MB which is simply not enough for eg. an hour long continous mix. Also i don't know about a tool which can quickly copy the lossy part of the mp3HD file with the meta, skipping the correction part.

- HD-AAC: This seems to be the best choice. Lossy part can be high quality on relatively small bitrates (eg. Nero q0.5 @175kbps is fine in most situations) but i can keep the lossless version at once. I haven't found any SLS encoded file yet but i guess the SLS part gets stored in an additional MP4 track, so one can quickly remove it with mp4box using remuxing, keeping everything else. It's not even too hard to write a tool for this on my own.

HD-AAC would be my choice although there's no encoders and decoders out yet in the public sad.gif

This post has been edited by darkbyte: Nov 27 2011, 18:10


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benski
post Mar 14 2012, 18:58
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QUOTE (darkbyte @ Nov 27 2011, 13:08) *
I guess foobar2000 and/or Winamp doesn't support HD-AAC out of the box so we have to wait for a decoder update there also.


HD-AAC would be my choice although there's no encoders and decoders out yet in the public sad.gif


Sorry, I've been busy working on some Winamp-for-Android stuff and havn't had time yet to get HD-AAC implemented.
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Posts in this topic
- rpp3po   Fraunhofer has begun marketing HD-AAC   Jan 10 2010, 20:35
- - Brent   You know, if only for the ridiculous ease of use w...   Jan 10 2010, 20:48
- - mixminus1   QUOTE (rpp3po @ Jan 10 2010, 11:35) For e...   Jan 10 2010, 20:55
|- - /mnt   Hopefully this might work better then the HD Mp3 f...   Jan 10 2010, 21:18
|- - C.R.Helmrich   QUOTE (mixminus1 @ Jan 10 2010, 21:55) Th...   Jan 10 2010, 23:32
|- - Garf   QUOTE (C.R.Helmrich @ Jan 10 2010, 23:32)...   Jan 11 2010, 00:28
|- - C.R.Helmrich   QUOTE (Garf @ Jan 11 2010, 01:28) One can...   Jan 11 2010, 00:47
||- - SebastianG   QUOTE (C.R.Helmrich @ Jan 11 2010, 00:47)...   Jan 11 2010, 15:16
|- - odyssey   Garf: Will Nero release an encoder capable of util...   Jan 11 2010, 09:51
||- - Sebastian Mares   QUOTE (odyssey @ Jan 11 2010, 09:51) Garf...   Jan 11 2010, 12:24
||- - odyssey   QUOTE (Sebastian Mares @ Jan 11 2010, 12...   Jan 11 2010, 13:00
||- - Garf   QUOTE (odyssey @ Jan 11 2010, 13:00) Wasn...   Jan 11 2010, 14:59
||- - odyssey   QUOTE (Garf @ Jan 11 2010, 14:59) I quit ...   Jan 11 2010, 15:59
|- - KFal   QUOTE (Brent @ Jan 10 2010, 21:48) You kn...   Jan 11 2010, 13:10
|- - mixminus1   QUOTE (Garf @ Jan 10 2010, 15:28) MPEG4 S...   Jan 11 2010, 16:55
|- - rpp3po   Both the HD-AAC and the sliced LC-AAC file can be ...   Jan 11 2010, 17:21
|- - Garf   QUOTE (rpp3po @ Jan 11 2010, 17:21) Both ...   Jan 11 2010, 17:42
|- - mixminus1   Yep, got it, thanks!   Jan 11 2010, 19:17
|- - rpp3po   While everything you write is correct, I think we ...   Jan 11 2010, 19:28
|- - rpp3po   I think, if Fraunhofer wants this to be a success,...   Jan 11 2010, 20:34
|- - Garf   QUOTE (rpp3po @ Jan 11 2010, 20:34) I thi...   Jan 11 2010, 21:48
||- - benski   QUOTE (Garf @ Jan 11 2010, 15:48) QUOTE (...   Jan 11 2010, 21:50
||- - rpp3po   QUOTE (Garf @ Jan 11 2010, 21:48) I'm...   Jan 11 2010, 23:41
||- - Garf   QUOTE (rpp3po @ Jan 11 2010, 23:41) QUOTE...   Jan 11 2010, 23:52
|- - Mike Giacomelli   QUOTE (rpp3po @ Jan 11 2010, 14:34) Micro...   Jan 11 2010, 21:52
- - andy o   Will be interesting to see how this affects the au...   Jan 11 2010, 10:58
|- - odyssey   QUOTE (andy o @ Jan 11 2010, 10:58) Peopl...   Jan 11 2010, 13:03
- - Kvanto   Does anyone tried to compile reference mpeg4 sls e...   Feb 18 2010, 03:32
- - Larson   http://www.youtube.com/watch?v=JESMLDu_AyM...playe...   Mar 11 2010, 13:02
- - darkbyte   As i've read somewhere the next version of Win...   Nov 14 2011, 18:16
- - menno   Nero 11 includes HD-AAC encoding (in Recode).   Nov 14 2011, 19:21
- - darkbyte   QUOTE (menno @ Nov 14 2011, 20:21) Nero 1...   Nov 14 2011, 20:58
- - menno   All Nero 11 applications will be able to playback/...   Nov 14 2011, 21:23
- - darkbyte   QUOTE (menno @ Nov 14 2011, 22:23) All Ne...   Nov 14 2011, 22:20
- - Ljubo44   How to convert audio file with nero recode 11. The...   Nov 26 2011, 02:40
- - Sebastian Mares   Works only when encoding video files AFAIK.   Nov 26 2011, 09:06
- - darkbyte   I hope that the command line encoder gets updated ...   Nov 27 2011, 18:08
|- - benski   QUOTE (darkbyte @ Nov 27 2011, 13:08) I g...   Mar 14 2012, 18:58
- - lvqcl   QUOTE I haven't found any SLS encoded file yet...   Nov 27 2011, 19:31
|- - darkbyte   QUOTE (lvqcl @ Nov 27 2011, 20:31) QUOTE ...   Nov 27 2011, 20:21
- - Ljubo44   I have problem with: libtsp.lib , in mpeg4sls/impo...   Nov 29 2011, 04:16
- - darkbyte   Any success since then Ljubo44?   Dec 10 2011, 17:49
- - Ljubo44   This is hard for compiling, please heelp. any with...   Mar 14 2012, 02:18
|- - nu774   QUOTE (Ljubo44 @ Mar 14 2012, 10:18) This...   Mar 14 2012, 09:37
- - eahm   QUOTE (rpp3po @ Jan 11 2010, 11:28) Reque...   Mar 14 2012, 10:11
- - darkbyte   QUOTE (benski @ Mar 14 2012, 19:58) QUOTE...   Aug 5 2012, 23:24
- - infoleather   These generated files to LC-AAC playback on any de...   Aug 29 2012, 06:17


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