Recursive formula

[tucothien]

Hi, I'm trying to understand this algorithm.
I have a question about lines 76 and 77.
Line 76: logGamma_frame=np.log(a10/a01) + gMeanLogLRT + np.log(b01+b10/( a10+a00*np.exp(-logGamma_frame) ) )
As I understand, line 76 corresponds to the recursive formula [1](11), right?
But why logGamma includes the term np.log(a10/a01)? It looks similar to the final decision.
According to [1], the final decision is a10 / a01 * Gamma
But at line 77: probRatio[i]=1/(1+np.exp(-logGamma_frame))
Why do you use this formula and where is the final decision in [1](9)?

I have seen the same thing in vadsohn.m in matlab voicebox lib.
I'm struggling with it.
Please help me clarify it.
Thank you very much.

[zuowanbushiwo]

@tucothien
Do you know now? I'm also struggling with it now.