Design Halfband filter with matlab

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nhkch

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I'm trying to design a half band filter for interpolation used in Sigma delta modulator. Current using Matlab delsig toolbox by Richard Schreier..

There is a function designHBF. I try the example given and got the result as stated in the pdf which is the snap shot below. I cant understand how connect the value obtain with the diagram given. Anyone can help? thanks

 

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