AACplus is coming up!!

IS POSSIBLE TO PLAY WELL In any AAC Player?
I have the Evivio Plugin for Windows Media and Real Player. It will Works fine wuth the new AACplus Files will Encode by NERO??


Or AACplus needs a New Plugin to PLAY IT?

I Need you Help.

Thanks.

It's already 'round the corner!



There are two answers to this question:

1. Yes, because it's backward compatible just like mp3PRO that you already know well. So an AAC+ stream will play with any normal AAC decoder, but only the low frequencies up to ~7 kHz.

2. No, to hear the full frequency range you will need players that are capable of decoding the SBR part.



Not the actual EnvivioTV, but they will probably also update their plugin, because AAC+ is part of the MEPG-4 standard now. That's one of the biggest advantages of AAC+ compared to mp3PRO. So probably even Apple has to update QuickTime 6 soon.



Yes, if you want to hear all frequencies (see above). But I'm quite sure that Menno already has finished an AAC+ version of FAAD2, because Nero wants to present their new "Nero Digital" software in one week in Las Vegas.

Up to 10 kHz. The AAC+ implementations that I know use SBR for over 10 kHz for normal 16/44 music at 64kbps.

Actually, High Efficiency AAC can be signalled in MP4 file in several ways, one of which is >not< backwards compatible (signalling Audio Object Type 5 - and all old MP4 players won't recognize this AOT). There are applications where it could be feasible not to allow old players to play HE AAC content, because of the degradation in quality.

Anyway, there is a backwards-compatible signalling as well.

any testing encoder somewhere around ??

Quoting Häns : ( for some reason, Quoting doesn't show the reply window correctly )

[QOUTE]
because AAC+ is part of the MEPG-4 standard now. That's one of the biggest advantages of AAC+ compared to mp3PRO. So probably even Apple has to update QuickTime 6 soon.
[/QUOTE]


I haven't looked to the papers of AAC+ ( actually, are they publicly avaiable, or one has to pay, like with MP3 or others? ), so I would like to ask this simple question :

Is it now possible to make an mp3PRO encoder/decoder, or the details of the SBR part in AAC is not applicable?

I suppose it is not such an important thing, if AAC+ is going to have much more support than mp3PRO.

OK, it depends on the chosen bitrate of course. Chencho will probably use AAC+ with 48 or even 32 kbps, because he has an internet radio station and needs very low bitrates for modem users - just like me... But I didn't know that the cutoff for the core AAC part is 10 KHz at 64 kbps, thanks for the information.

Sure, how many do you need?

Probably because it's "QUOTE", not "QOUTE". ;-)



You always have to pay if you want the latest specifications and/or reference software directly from the ISO on a CD (~EUR 50.00), but older papers can also be downloaded for free from the FTP servers of the MPEG Audio Subgroup or the MPEG site.



It was possible to obtain a SDK for the mp3PRO decoder from Gracenote for more than one year now, bundled with their own source code. I don't know if someone took this offer or if it didn't happen at all, but it was announced that way and Coding Technologies confirmed this some weeks ago in a mail.

The SBR part in AAC+ probably differs too much from mp3PRO, so it will be difficult or even impossible to implement it in a normal MP3 encoder.



That's right...