/******************************************************************************
IrstLM: IRST Language Model Toolkit
Copyright (C) 2006 Marcello Federico, ITC-irst Trento, Italy

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

******************************************************************************/

// Linear discounting interpolated LMs


//Witten and Bell linear discounting

class linearwb: public mdiadaptlm{
  int prunethresh;
  int minfreqthresh;
 public:
  linearwb(char* ngtfile,int depth=0,int prunefreq=0,TABLETYPE tt=SHIFTBETA_B);
  int train();
  int discount(ngram ng,int size,double& fstar,double& lambda,int cv=0);
  ~linearwb(){}
};



//Good Turing linear discounting

//no more supported
