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itpp::Scalar_Quantizer Class Reference
[Source Coding Routines]

#include <itpp/srccode/vq.h>

List of all members.


Detailed Description

Class for vector quantization.

The following code illustrates how the quantizer can be initialized from a file and used to quantize a random vector.

    Scalar_Quantizer  Quantizer;
    double        x,y;
    int         i;

    Quantizer.load("random.sq");
    x=randn();
    i=Quantizer.encode(x);
    y=Quantizer.decode(i);

Definition at line 151 of file vq.h.


Public Member Functions

 Scalar_Quantizer ()
 Default constructor.
 Scalar_Quantizer (const char *Name)
 Create a VQ from a VQ file.
int encode (double x) const
 Encode.
ivec encode (const vec &x) const
 Encode the input vector.
double decode (int Index) const
 Decode the index.
vec decode (const ivec &Index) const
 Decode the indices.
double Q (double x) const
 Quantize.
vec Q (const vec &x) const
 Quantize the input vector.
double operator() (double x) const
 Quantize.
vec operator() (const vec &x) const
 Quantize the input vector.
void set_levels (const vec &L)
 Initialize the codebook by a matrix.
vec get_levels () const
 Returns the codebook.
int size () const
 Returns the size (number of codevectors) of the VQ.

Protected Attributes

vec Levels
 The vector containing the code book.
double LatestDist
 The distortion at the latest time a vector was encoded.

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