[WM]: Asking help about Psychoacoustic Model.

["Benrong" <brchen@ee.cuhk.edu.hk>]

Dear all,

In the MPEG standard 11172-3, Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to about 1.5 MBIT/S
Part 3, Audio.

ANNEX D (informative)
Psychoacoustic Model I,

While in the Step 7, Calculation of the global masking threshold LTg.

There is a equation like this:

LTg(i) = 10 log (10 LTq(i) / 10 ++);

It is said to find the global masking threshold by summing the powers corresponding to the individual masking threshold and threshold in quiet.

But I am confused  about this equation. Is there anything wrong?
Or can anybody help me to express this problem.

Thanks in advance.

Regards
Ben



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