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Topic: SBR test sequences Max Diff and RMS (Read 2372 times) previous topic - next topic
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SBR test sequences Max Diff and RMS

Hello everyone,

I'm new here  . I work on MP3 and AAC (LC, LTP, HE-AAC) for now 6 months.

I'm now ready to test with iso vectors. So I bought everything I need from ISO web site  .

For MP3 and AAC-LC and LTP I have no problem. I passed  .

But for HE-AAC I don't know how to use the figure given in 14496-4/Amd8 in table AMD8.3    .

For exemple it's given for QMF test vectors Max diff 5 and RMS(linear value) 1.4.

What should I do now with thoses values. Is Max diff mean 5*3.05*10-5(Q15)?
is the RMS(linear value) mean 20*log10(1.4)=3dB so I need to be under 3dB. (of course I'm hopefully)?

Please Help I don't know wath to do with my figures. So I'm not able to say if I'm compliante or not.

SBR test sequences Max Diff and RMS

Reply #1 –
Hey, nobody can help me?

Does it means that I'm the only personne how try the ISO norme on my decoder?
I have a client ansking for it that why...

Please is someone understanding something to thoses figures whitout scale, or unity?

SBR test sequences Max Diff and RMS

Reply #2 –
Hi,lebenworld

I'd like to study on the HE-AAC, but I haven't got the standard of the SBR yet.
Would you like to send me a copy?
My e-mail :wangyan20014000@163.com
thanks for the advance.