lm_05.cc

这是一个从音频信号里提取特征参量的程序

// file: $isip/class/asr/LanguageModel/lm_05.cc
// version: $Id: lm_05.cc,v 1.6 2002/07/16 03:11:38 wang Exp $
//

// isip include files
//
#include "LanguageModel.h"
#include <Console.h>

// method: load
//
// arguments:
//    const Vector<String>& files_a: (input) a vector of input files
//    const Vector<String>& tags_a: (input) a vector of level tages
//
// return: a boolean value indicating status
//
// This method reads levels of language models from a vector of input files
// where each file is corresponding to a search level
//
boolean LanguageModel::load(const Vector<String>& files_a,
			    const Vector<String>& tags_a) {
  // set num_level_d
  // for each search level there is one file in the input vector 
  //
  num_level_d = files_a.length();
  search_levels_d.setLength(num_level_d);
  
  for(long i=0; i<num_level_d; i++) {
    String file_name = files_a(i);
    String level_tag = tags_a(i);

    // set level index
    //
    search_levels_d(i).setLevelIndex(i);

    // declare a sof file pointer
    //
    Sof sof;
    
    // open the sof file
    //
    if(!sof.open(file_name, File::READ_ONLY)) {
      return Error::handle(file_name, L"open", Error::TEST,
			   __FILE__, __LINE__);
    }
    
    // read in the user settings for the ISIP graph
    // starting and terminal symbols
    //
    setGraphEndings(sof);

    // read the data from the file  
    //  
    read(sof, level_tag, search_levels_d(i));
    
    // close the file
    //
    sof.close();
  } // end: for(long i=0; i<num_files_a; i++)
  
  // exit gracefully
  //
  return true;
}

// method: load
//
// arguments:
//    const Vector<String>& files_a: (input) a vector of input files
//    const Vector<String>& tags_a: (input) a vector of level tages
//    Vector<SearchLevel>& search_levels_a: (output) search levels
//
// return: a boolean value indicating status
//
// This method reads levels of language models from a vector of input files
// where each file is corresponding to a search level, but store the level
// informations into the output search levels
//
boolean LanguageModel::load(const Vector<String>& files_a,
			    const Vector<String>& tags_a,
			    Vector<SearchLevel>& search_levels_a) {
  // set num_level_d
  // for each search level there is one file in the input vector 
  //
  num_level_d = files_a.length();

  // resize search_level_d to fit the needed length
  //
  //search_levels_d.setLength(num_level_d, false);
 
  for(long i=0; i<num_level_d; i++) {
    String file_name = files_a(i);
    String level_tag = tags_a(i);

    // set level index
    //
    search_levels_a(i).setLevelIndex(i);

    // declare a sof file pointer
    //
    Sof sof;
    
    // open the sof file
    //
    if(!sof.open(file_name, File::READ_ONLY)) {
      return Error::handle(file_name, L"open", Error::TEST,
			   __FILE__, __LINE__);
    }

    // read in the user settings for the ISIP graph
    // starting and terminal symbols
    //
    setGraphEndings(sof);
  
    // read the data from the file  
    //  
    read(sof, level_tag, search_levels_a(i));
    
    // close the file
    //
    sof.close();
  } // end: for(long i=0; i<num_files_a; i++)
  
  // exit gracefully
  //
  return true;
}