16.4 Field Types

 

The currently defined fields are as follows:-

  Field        abbr o|c Description

Header fields
  VERSION=%s     V  o  Lattice specification adhered to
  UTTERANCE=%s   U  o  Utterance identifier
  SUBLAT=%s      S  o  Sub-lattice name
  base=%f           o  LogBase for Likelihoods (0.0 not logs,default base e)
  lmname=%s         o  Name of Language model
  lmscale=%f        o  Scaling factor for language model
  wdpenalty=%f      o  Word insertion penalty

Lattice Size fields
  NODES=%d       N  c  Number of nodes in lattice
  LINKS=%d       L  c  Number of links in lattice

Node Fields
  I=%d                 Node identifier.  Starts node information
  time=%f        t  o  Time from start of utterance (in seconds)
  WORD=%s        W wc  Word (If lattice labels nodes rather that links)
  L=%s             wc  Substitute named sub-lattice for this node
  var=%d         v wo  Pronunciation variant number

Link Fields
  J=%d                 Link identifier.  Starts link information
  START=%d       S  c  Start node number (of the link)
  END=%d         E  c  End node number (of the link)
  WORD=%s        W wc  Word (If lattice labels links rather that nodes)
  var=%d         v wo  Pronunciation variant number
  div=%s         d wo  Segmentation [ d=:(label[,duration,like]:)+ ]
  acoustic=%f    a wo  Acoustic likelihood of link
  ngram=%f       n  o  NGram likelihood of link
  language=%f    l  o  General language model likelihood of link

Note. The word identity (and associated `w' fields var,div and acoustic) must
      appear on either the link or the end node (forwards lattices) or the 
      start node (backwards lattices) of the link.
      abbr is a possible single character abbreviation for the field name
      o|c indicates whether field is optional or compulsory.