Edinburgh Speech Tools  2.1-release
Functions
Area Functions
Functions for Generating Frames » Linear Prediction functions
Collaboration diagram for Area Functions:

Functions

void ref2truearea (const EST_FVector &ref, EST_FVector &area)
 
void ref2area (const EST_FVector &ref, EST_FVector &area)
 
void ref2logarea (const EST_FVector &ref, EST_FVector &logarea)
 

Detailed Description

Using the analogy of the lossless tube, the cross-sectional areas of the sections of this tube are related to the reflection coefficients and can be calculated from the following relationship:

\[\frac{A_{i+1}}{A_{i}} = \frac{i - k_{i}}{1 + k_{i}} \]

Function Documentation

void ref2truearea ( const EST_FVector &  ref,
EST_FVector &  area 
)

The area according to the formula.

Definition at line 282 of file sigpr_frame.cc.

void ref2area ( const EST_FVector &  ref,
EST_FVector &  area 
)

An approximation of the area is calculate by skipping the denominator in the formula.

Definition at line 261 of file sigpr_frame.cc.

void ref2logarea ( const EST_FVector &  ref,
EST_FVector &  logarea 
)

The logs of the areas.

Definition at line 267 of file sigpr_frame.cc.