QUANT_f

Scicos Block
fr - eng

Quantization

$\epsfig{file=QUANT_f.eps,height=90pt}$

This block outputs the quantization of the input according to a choice of methods:

Round method:

$\begin{eqnarray} y(i)&={\rm Step}*({\rm int}(u(i)/{\rm Step}+0.5)-0.5) &\texttt... ...}*({\rm int}(u(i)/{\rm Step}-0.5)+0.5) &\texttt{if} \; u(i)>=0 . \end{eqnarray}$
Truncation method:

$\begin{eqnarray} y(i)&={\rm Step}*({\rm int}(u(i)/{\rm Step}+0.5)) &\texttt{if}... ... Step}*({\rm int}(u(i)/{\rm Step}-0.5)) &\texttt{if} \; u(i)>=0 . \end{eqnarray}$
Floor method:

$\begin{eqnarray} y(i)&={\rm Step}*({\rm int}(u(i)/{\rm Step}+0.5)) . \end{eqnarray}$
Ceil method:

$\begin{eqnarray} y(i)&={\rm Step}*({\rm int}(u(i)/{\rm Step}-0.5)) \end{eqnarray}$

$\begin{figure}\begin{center} \epsfig{file=QUANT_f_gui.eps,width=260pt} \end{center}\end{figure}$

Step
scalar, Quantization step
Properties : Type 'vec' of size 1.
Quantization Type
scalar with possible values 1,2,3 or 4

1

Round method

2

Truncation method

3

Floor method

4

Ceil method

Properties : Type 'vec' of size 1.

Ramine Nikoukhah INRIA