Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: FhG AACDemo 2.2 test samples (Read 5220 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

FhG AACDemo 2.2 test samples

Quote
Originally posted by rjamorim
99%+ of the people here never heard a stream encoded with AACdemo 2.2 - only Ivan and Menno, I guess)  

Regards;

Roberto.
Hmm, if that is so, maybe I can help just a bit. Here's Fade to Black Mettalica sample from Lame test sample page (http://lame.sourceforge.net/download/samples/ftb_samp.wav)
encoded with FhG AACDemo 2.2:
http://sivut.koti.soon.fi/julaak/ftb_samp-FGh_ref2.2.aac
Juha Laaksonheimo

FhG AACDemo 2.2 test samples

Reply #1 –
Ok, here are more AACDemo 2.2 test samples:
Applaud
Blackbird
Castanets
Fatboy
Ftb_samp
hihat
mstest
http://sivut.koti.soon.fi/julaak/AACDemo2.2_test_samples.zip

Originals are at Lame test sample page:
http://lame.sourceforge.net/gpsycho/quality.html

*Cough* The samples were found on the net, from a reliable source..
(FhG doesn't allow posting of results of demo codec encodings.)
But these indeed are AACDemo 2.2 encoded.
Juha Laaksonheimo

FhG AACDemo 2.2 test samples

Reply #2 –
Thanks, JohnV.

Quote
Originally posted by JohnV
(FhG doesn't allow posting of results of demo codec encodings.)


That's why I thought only people involved with AAC developing had had access to these samples.

Regards;

Roberto.

FhG AACDemo 2.2 test samples

Reply #3 –
Quote
Originally posted by JohnV
Ok, here are more AACDemo 2.2 test samples:
Applaud
Blackbird
Castanets
Fatboy
Ftb_samp
hihat
mstest
http://sivut.koti.soon.fi/julaak/AACDemo2.2_test_samples.zip

Originals are at Lame test sample page:
http://lame.sourceforge.net/gpsycho/quality.html

But these indeed are AACDemo 2.2 encoded.


Encoder has a serious bug. The right channel contains from time to time strange low frequency
artefacts which makes it very easy to distinguish
between original and encoded file. For decoding
I used faad2 + AKG-401.

Can someone for example encode castagnets again
with switched channels (right <-> left)?
--  Frank Klemm

FhG AACDemo 2.2 test samples

Reply #4 –
Quote
Originally posted by Frank Klemm
Can someone for example encode castagnets again
with switched channels (right <-> left)?
Unfortunately I don't think this is possible. I don't know any person who has access to AACDemo 2.2 at the moment.
Juha Laaksonheimo

FhG AACDemo 2.2 test samples

Reply #5 –
Actually, AACDemo uses rather conservative cut-off filter that starts at 15 kHz and ends at 17 kHz.

Encoder is more or less state-of-the-art at 128 kbps. Fatboy is coded with small "bug" (this bug doesn't exist in Dolby AAC, but Dolby AAC encodes castanets with more distortion in low-freq domain)

It would be interesting to see how other AAC/MP3/... encoders encode same samples at 128 kbps CBR.
 

FhG AACDemo 2.2 test samples

Reply #6 –
Ok, same set of samples encoded with PsyTEL AACEnc 2.15 - at 128 kbps.

I think it is a nice showcase showing how close the "independent" implementatioins have approached the state-of-the-art

http://www.psytel-research.co.yu/samples/psytel_test.zip

Note that those AACDemo samples were encoded in MAIN profile, and PsyTEL samples are encoded in LC (Low Complexity) profile!