Filter Design Toolbox

isallpass

Test quantized filters to determine whether they are allpass structures

Syntax

flag = isallpass(f)
flag = isallpass(f,k)

Description

flag = isallpass(f) determines whether the filter object f has allpass filter sections, returning 1 if true and 0 if false.

flag = isallpass(f,k) determines whether the k-th section of the filter object f is an allpass section and returns 1 if true and 0 if false.

Since lattice coupled allpass filters always have allpass sections, this function always returns one filters whose structure is latticeca.

See Also
isfir       Test quantized filters to see if they are FIR filters.

islinphase  Test quantized filters to see if they are linear phase.

ismaxphase  Test quantized filters to see if they are maximum phase filters.

isminphase  Test quantized filters to see if they are minimum phase.

isreal      Test quantized filters for purely real coefficients.

issos       Test whether quantized filters are in second-order section form.

isstable    Test for stability of a quantized filter.

initss

isfir