1. A method of calculating iteration values for free parameters &lgr; &agr; ortho(n) of a maximum-entropy speech model MESM in a speech recognition system with the aid of the generalized iterative scaling training algorithm in accordance with the following formula: &lgr; &agr; ortho( n&plus;l) &equals;G (&lgr; &agr; ortho(n), m &agr; ortho,... ) n: is an iteration parameter; G: is a mathematical function; &agr;: is an attribute in the MESM; and m &agr; ortho : is a desired orthogonalized boundary value in the MESM for the attribute &agr;, characterized in that the desired orthogonalized boundary value m &agr; ortho is calculated by linearly combining the desired boundary value m &agr; with desired boundary values m &bgr; of attributes &bgr; that have a larger range than the attribute &agr;.