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Original WAV of AAC Test vectors needed, need help
sospee
post Oct 17 2003, 03:39
Post #1





Group: Members
Posts: 6
Joined: 15-October 03
From: Shenzhen
Member No.: 9314



hi, there,
Starting debugging AAC decoder, currently using FAAC. Downloaded some test vectors from FhG ftp server, but failed to download al03-08_fs.wav. Is there any one have these files?

Why I need these files? When I decode al05_48.mp4 (using both foobar0.7.1 and my own compilation), the reconstructed WAV is only 32kHz signal. I guess the original WAV is just 32kHz sampled, if else, there must be sth wrong with AAC codec for it cannot fully represent the audio band (OGG does). If yes, the testing using 32kHz sampled signal for 48kHz codec is nonsense. //my opinion.

So, can any one help to find these WAV files? thanks!

sospee


--------------------
There's a hero / If you look inside your heart /
You don't have to be afaid / Of what you are /
There's an answer / If you reach into your soul /
And the sorrow that you know / Will melt away /
And then a hero comes along /
With the strenth to carry on ...
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sospee
post Oct 20 2003, 04:28
Post #2





Group: Members
Posts: 6
Joined: 15-October 03
From: Shenzhen
Member No.: 9314



How stupid I am!
Downloaded FAAC and briefly read the code. Found that:
static const int bwmax = 16000;//bandwidth max
static const double bwfac = 0.45;//bandwdth factor, bw=bwfac*bw
It seems that the encoder has already limited the output bandwidth.
With modifications to these "variables", output is what I want.


--------------------
There's a hero / If you look inside your heart /
You don't have to be afaid / Of what you are /
There's an answer / If you reach into your soul /
And the sorrow that you know / Will melt away /
And then a hero comes along /
With the strenth to carry on ...
Go to the top of the page
+Quote Post

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