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 is an allpass filter, 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 1 for filters whose structure is latticeca.

See Also
isfir, islinphase, ismaxphase, isminphase, isreal, issos, isstable

impz

isfir