File: QUANT_f.cat

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QUANT_f(5)                      Scicos Block                       QUANT_f(5)
NAME
  QUANT_f - Scicos Quantization block

DIALOGUE PARAMETERS

  Step                : scalar, Quantization step

  Quantization method : scalar with possible values 1,2,3 or 4

                      1 : Round method

                      2 : Truncation method

                      3 : Floor method

                      4 : Ceil method

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

  for Round method

  y(i)=Step*(int(u(i)/Step+0.5)-0.5) if u(i)<0.

  y(i)=Step*(int(u(i)/Step-0.5)+0.5). if u(i)>=0.
  For truncation method

  y(i)=Step*(int(u(i)/Step+0.5)) if u(i)<0.

  y(i)=Step*(int(u(i)/Step-0.5)) if u(i)>=0.
  For floor method

  y(i)=Step*(int(u(i)/Step+0.5)) .
  For ceil method

  y(i)=Step*(int(u(i)/Step-0.5)) .