MfccOptions contains basic options for computing MFCC features. More...

#include <feature-mfcc.h>

Collaboration diagram for MfccOptions:

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Public Member Functions
	MfccOptions ()

void	Register (OptionsItf *opts)

Public Attributes
FrameExtractionOptions	frame_opts

MelBanksOptions	mel_opts

int32	num_ceps

bool	use_energy

BaseFloat	energy_floor

bool	raw_energy

BaseFloat	cepstral_lifter

bool	htk_compat

Detailed Description

MfccOptions contains basic options for computing MFCC features.

Definition at line 38 of file feature-mfcc.h.

Constructor & Destructor Documentation

◆ MfccOptions()

MfccOptions ( )

inline

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

                 : mel_opts(23),
                   // defaults the #mel-banks to 23 for the MFCC computations.
                   // this seems to be common for 16khz-sampled data,
                   // but for 8khz-sampled data, 15 may be better.
                   num_ceps(13),
                   use_energy(true),
                   energy_floor(0.0),
                   raw_energy(true),
                   cepstral_lifter(22.0),
                   htk_compat(false) {}

Member Function Documentation

◆ Register()

void Register ( OptionsItf * opts )

inline

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

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

Referenced by main().

                                   {
     frame_opts.Register(opts);
     mel_opts.Register(opts);
     opts->Register("num-ceps", &num_ceps,
                    "Number of cepstra in MFCC computation (including C0)");
     opts->Register("use-energy", &use_energy,
                    "Use energy (not C0) in MFCC computation");
     opts->Register("energy-floor", &energy_floor,
                    "Floor on energy (absolute, not relative) in MFCC 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("cepstral-lifter", &cepstral_lifter,
                    "Constant that controls scaling of MFCCs");
     opts->Register("htk-compat", &htk_compat,
                    "If true, put energy or C0 last and use a factor of sqrt(2) on "
                    "C0.  Warning: not sufficient to get HTK compatible features "
                    "(need to change other parameters).");
   }