PlpOptions Struct Reference

PlpOptions contains basic options for computing PLP features. More...

#include <feature-plp.h>

Collaboration diagram for PlpOptions:

Public Member Functions
	PlpOptions ()
void	Register (OptionsItf *opts)

Public Attributes
FrameExtractionOptions	frame_opts
MelBanksOptions	mel_opts
int32	lpc_order
int32	num_ceps
bool	use_energy
BaseFloat	energy_floor
bool	raw_energy
BaseFloat	compress_factor
int32	cepstral_lifter
BaseFloat	cepstral_scale
bool	htk_compat

Detailed Description

PlpOptions contains basic options for computing PLP features.

It only includes things that can be done in a "stateless" way, i.e. it does not include energy max-normalization. It does not include delta computation.

Definition at line 42 of file feature-plp.h.

Constructor & Destructor Documentation

PlpOptions()

PlpOptions ( )

inline

Definition at line 57 of file feature-plp.h.

               : mel_opts(23),
                 // default number of mel-banks for the PLP computation; this
                 // seems to be common for 16kHz-sampled data. For 8kHz-sampled
                 // data, 15 may be better.
                 lpc_order(12),
                 num_ceps(13),
                 use_energy(true),
                 energy_floor(0.0),
                 raw_energy(true),
                 compress_factor(0.33333),
                 cepstral_lifter(22),
                 cepstral_scale(1.0),
                 htk_compat(false) {}

Member Function Documentation

Register()

void Register ( OptionsItf *  opts )

inline

Definition at line 71 of file feature-plp.h.

References OptionsItf::Register(), MelBanksOptions::Register(), and FrameExtractionOptions::Register().

Referenced by main().

                                  {
    frame_opts.Register(opts);
    mel_opts.Register(opts);
    opts->Register("lpc-order", &lpc_order,
                   "Order of LPC analysis in PLP computation");
    opts->Register("num-ceps", &num_ceps,
                   "Number of cepstra in PLP computation (including C0)");
    opts->Register("use-energy", &use_energy,
                   "Use energy (not C0) for zeroth PLP feature");
    opts->Register("energy-floor", &energy_floor,
                   "Floor on energy (absolute, not relative) in PLP computation. "
                   "Only makes a difference if --use-energy=true; only necessary if "
                   "--dither=0.0.  Suggested values: 0.1 or 1.0");
    opts->Register("raw-energy", &raw_energy,
                   "If true, compute energy before preemphasis and windowing");
    opts->Register("compress-factor", &compress_factor,
                   "Compression factor in PLP computation");
    opts->Register("cepstral-lifter", &cepstral_lifter,
                   "Constant that controls scaling of PLPs");
    opts->Register("cepstral-scale", &cepstral_scale,
                   "Scaling constant in PLP computation");
    opts->Register("htk-compat", &htk_compat,
                   "If true, put energy or C0 last.  Warning: not sufficient "
                   "to get HTK compatible features (need to change other "
                   "parameters).");
  }

Member Data Documentation

cepstral_lifter

int32 cepstral_lifter

Definition at line 51 of file feature-plp.h.

Referenced by PlpComputer::Compute(), and PlpComputer::PlpComputer().

cepstral_scale

BaseFloat cepstral_scale

Definition at line 52 of file feature-plp.h.

Referenced by PlpComputer::Compute(), and UnitTestHTKCompare1().

compress_factor

BaseFloat compress_factor

Definition at line 50 of file feature-plp.h.

Referenced by PlpComputer::Compute().

energy_floor

BaseFloat energy_floor

Definition at line 48 of file feature-plp.h.

Referenced by PlpComputer::Compute(), and PlpComputer::PlpComputer().

frame_opts

FrameExtractionOptions frame_opts

Definition at line 43 of file feature-plp.h.

Referenced by PlpComputer::Compute(), PlpComputer::GetMelBanks(), PlpComputer::PlpComputer(), kaldi::TestOnlineAppendFeature(), kaldi::TestOnlinePlp(), UnitTestHTKCompare1(), and UnitTestSimple().

htk_compat

bool htk_compat

Definition at line 54 of file feature-plp.h.

Referenced by PlpComputer::Compute(), kaldi::TestOnlineAppendFeature(), and UnitTestHTKCompare1().

lpc_order

int32 lpc_order

Definition at line 45 of file feature-plp.h.

Referenced by PlpComputer::Compute(), and PlpComputer::PlpComputer().

mel_opts

MelBanksOptions mel_opts

Definition at line 44 of file feature-plp.h.

Referenced by PlpComputer::Compute(), PlpComputer::GetMelBanks(), PlpComputer::PlpComputer(), kaldi::TestOnlineAppendFeature(), UnitTestHTKCompare1(), and UnitTestSimple().

num_ceps

int32 num_ceps

Definition at line 46 of file feature-plp.h.

Referenced by PlpComputer::Compute(), and PlpComputer::PlpComputer().

raw_energy

bool raw_energy

Definition at line 49 of file feature-plp.h.

Referenced by PlpComputer::Compute().

use_energy

bool use_energy

Definition at line 47 of file feature-plp.h.

Referenced by PlpComputer::Compute(), kaldi::TestOnlineAppendFeature(), and UnitTestHTKCompare1().

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The documentation for this struct was generated from the following file:

• feat/feature-plp.h