denormalize

Undo filter coefficient and gain changes caused by normalize

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Syntax

denormalize(hq)

Description

denormalize(hq) reverses the coefficient changes you make when you use normalize with hq. The filter coefficients do not change if you call denormalize(hq) before you use normalize(hq). Calling denormalize more than once on a filter does not change the coefficients after the first denormalize call.

Examples

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Open Live Script

Construct a quantized filter hd.

d=fdesign.highpass('n,F3dB',14,0.45);
hd =design(d,'butter');
hd.arithmetic='fixed';

Normalize the filter coefficients

normalize(hd)
NormSOSMatrix = hd.sosMatrix;

After normalizing the filter coefficients, restore them to their original values by reversing the effects of the normalize function.

denormalize(hd)
eqSOSMatrices = isequal(NormSOSMatrix,hd.sosMatrix)
eqSOSMatrices = logical
   0

See Also

Introduced in R2011a

DSP System Toolbox Documentation

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