CLAM::MelFilterBank Class Reference
#include <MelFilterBank.hxx>
Detailed Description
This class performs filterbank analysis for Mel Frequency Cepstrum Coefficients (MFCC) computation.It is designed to be compliant with similar functionality found in the speech processing software HTK v3.2.1.
No normalization or windowing of the spectrum data is performed prior to analysis.
- See also:
- CLAM::CepstralTransform
Definition at line 67 of file MelFilterBank.hxx.
Public Member Functions | |
| MelFilterBank () | |
| MelFilterBank (const MelFilterBankConfig &) | |
| ~MelFilterBank () | |
| bool | Do () |
| Supervised mode execution method (using ports). | |
| bool | Do (const Spectrum &s, MelSpectrum &ms) |
| Perform the filterbank analysis using the specified number of bands. | |
| const ProcessingConfig & | GetConfig () const |
| Configuration getter. | |
| virtual const char * | GetClassName () const |
| Override it in every subclass and retur the name of that class. | |
Protected Member Functions | |
| virtual bool | ConcreteConfigure (const ProcessingConfig &cfg) |
| Configuration method interface. | |
| TData | Mel (TData linFreq) |
| Linear to Mel scale transformation. | |
| void | InitializeTables () |
Constructor & Destructor Documentation
| CLAM::MelFilterBank::MelFilterBank | ( | ) |
| CLAM::MelFilterBank::MelFilterBank | ( | const MelFilterBankConfig & | cfg | ) |
| CLAM::MelFilterBank::~MelFilterBank | ( | ) |
Definition at line 65 of file MelFilterBank.cxx.
Member Function Documentation
| bool CLAM::MelFilterBank::Do | ( | ) | [virtual] |
Supervised mode execution method (using ports).
- Returns:
- A boolean telling whether it has been output
Implements CLAM::Processing.
Definition at line 69 of file MelFilterBank.cxx.
| bool CLAM::MelFilterBank::Do | ( | const Spectrum & | s, | |
| MelSpectrum & | ms | |||
| ) |
Perform the filterbank analysis using the specified number of bands.
- Parameters:
-
s Input spectrum from FFT transform ms Output filterbank coefficients
- Returns:
- True is computation was successfull, false otherwise
Definition at line 79 of file MelFilterBank.cxx.
References CLAM::Processing::AbleToExecute(), CLAM_ASSERT, and CLAM::EScale::eLinear.
| const ProcessingConfig& CLAM::MelFilterBank::GetConfig | ( | ) | const [inline, virtual] |
Configuration getter.
Gets the configuration parameters used to create the object.
- Returns:
- Const reference to the configuration object. The usual way to perform a configuration change in the processing object is to take a copy of this reference, to change it and to send it with the Configure method. If not overriden, it returns a NullProcessingConfig.
Reimplemented from CLAM::Processing.
Definition at line 89 of file MelFilterBank.hxx.
| virtual const char* CLAM::MelFilterBank::GetClassName | ( | ) | const [inline, virtual] |
Override it in every subclass and retur the name of that class.
Implements CLAM::Processing.
Definition at line 94 of file MelFilterBank.hxx.
| bool CLAM::MelFilterBank::ConcreteConfigure | ( | const ProcessingConfig & | ) | [protected, virtual] |
Configuration method interface.
The Processing base class forces all the concrete classes derived from it to implement this method, which must actually perform the specific configuration tasks.
Note that the user can not call this method directly. He will use Configure instead. The argument is expected to be an object of the necesary concrete configuration class.
- Parameters:
-
Reference to the configuration object.
- Returns:
- false if the object is not yet fully configured. (For example, if some important configuration attribute such as number of ports was set to zero in the config object)
- Exceptions:
-
This method must throw a bad_cast exception if the argument is not an object of the expected configuration class.
Reimplemented from CLAM::Processing.
Definition at line 134 of file MelFilterBank.cxx.
References CLAM::Processing::CopyAsConcreteConfig(), and InitializeTables().
Linear to Mel scale transformation.
- Parameters:
-
linFreq Frequency in Hz.
- Returns:
- Frequency in Mel.
Definition at line 141 of file MelFilterBank.cxx.
Referenced by InitializeTables().
| void CLAM::MelFilterBank::InitializeTables | ( | ) | [protected] |
Definition at line 153 of file MelFilterBank.cxx.
References Mel().
Referenced by ConcreteConfigure().
The documentation for this class was generated from the following files:
