kaldi GMM模型解碼指令 gmm-latgen-faster詳解

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##- 做用：

Generate lattices using GMM-based model. 生成基於GMM模型的lattice詞格）

##- 用法：

Usage: gmm-latgen-faster [options] model-in (fst-in|fsts-rspecifier) features-rspecifier lattice-wspecifier [ words-wspecifier [alignments-wspecifier] ]

##- 可選項及含義：

Options:
  --acoustic-scale            : Scaling factor for acoustic likelihoods (float, default = 0.1)
  --allow-partial             : If true, produce output even if end state was not reached. (bool, default = false)
  --beam                      : Decoding beam.  Larger->slower, more accurate. (float, default = 16)
  --beam-delta                : Increment used in decoding-- this parameter is obscure and relates to a speedup in the way the max-active constraint is applied.  Larger is more accurate. (float, default = 0.5)
  --delta                     : Tolerance used in determinization (float, default = 0.000976562)
  --determinize-lattice       : If true, determinize the lattice (lattice-determinization, keeping only best pdf-sequence for each word-sequence). (bool, default = true)
  --hash-ratio                : Setting used in decoder to control hash behavior (float, default = 2)
  --lattice-beam              : Lattice generation beam.  Larger->slower, and deeper lattices (float, default = 10)
  --max-active                : Decoder max active states.  Larger->slower; more accurate (int, default = 2147483647)
  --max-mem                   : Maximum approximate memory usage in determinization (real usage might be many times this). (int, default = 50000000)
  --min-active                : Decoder minimum #active states. (int, default = 200)
  --minimize                  : If true, push and minimize after determinization. (bool, default = false)
  --phone-determinize         : If true, do an initial pass of determinization on both phones and words (see also --word-determinize) (bool, default = true)
  --prune-interval            : Interval (in frames) at which to prune tokens (int, default = 25)
  --word-determinize          : If true, do a second pass of determinization on words only (see also --phone-determinize) (bool, default = true)
  --word-symbol-table         : Symbol table for words [for debug output] (string, default = "")

Standard options:
  --config                    : Configuration file to read (this option may be repeated) (string, default = "")
  --help                      : Print out usage message (bool, default = false)
  --print-args                : Print the command line arguments (to stderr) (bool, default = true)
  --verbose                   : Verbose level (higher->more logging) (int, default = 0)

##- 使用實例：

gmm-latgen-faster --max-active=700 --beam=13 --lattice-beam=6 --acoustic-scale=0.1 --allow-partial=true --word-symbol-table=words.txt final.mdl HCLG.fst ark:delta.ark ark:lattice.ark

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