FbankOptions contains basic options for computing filterbank features. More...

#include <feature-fbank.h>

Collaboration diagram for FbankOptions:

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Public Member Functions
	FbankOptions ()

void	Register (OptionsItf *opts)

Public Attributes
FrameExtractionOptions	frame_opts

MelBanksOptions	mel_opts

bool	use_energy

BaseFloat	energy_floor

bool	raw_energy

bool	htk_compat

bool	use_log_fbank

bool	use_power

Detailed Description

FbankOptions contains basic options for computing filterbank 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 41 of file feature-fbank.h.

Constructor & Destructor Documentation

◆ FbankOptions()

FbankOptions ( )

inline

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

                 : mel_opts(23),
                  // defaults the #mel-banks to 23 for the FBANK computations.
                  // this seems to be common for 16khz-sampled data,
                  // but for 8khz-sampled data, 15 may be better.
                  use_energy(false),
                  energy_floor(0.0),
                  raw_energy(true),
                  htk_compat(false),
                  use_log_fbank(true),
                  use_power(true) {}

Member Function Documentation

◆ Register()

void Register ( OptionsItf * opts )

inline

Definition at line 62 of file feature-fbank.h.

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

Referenced by main().

                                   {
     frame_opts.Register(opts);
     mel_opts.Register(opts);
     opts->Register("use-energy", &use_energy,
                    "Add an extra dimension with energy to the FBANK output.");
     opts->Register("energy-floor", &energy_floor,
                    "Floor on energy (absolute, not relative) in FBANK 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("htk-compat", &htk_compat, "If true, put energy last.  "
                    "Warning: not sufficient to get HTK compatible features (need "
                    "to change other parameters).");
     opts->Register("use-log-fbank", &use_log_fbank,
                    "If true, produce log-filterbank, else produce linear.");
     opts->Register("use-power", &use_power,
                    "If true, use power, else use magnitude.");
   }