Implementations of a two-dimensional pyramid filter are disclosed
including a two-dimensional pyramid filter architecture of an order 2N-1, where
N is a positive integer greater than three. The two-dimensional pyramid filter
architecture of order 2N-1 may include one-dimensional pyramid filters of order
2N-1, a first summer circuit; and a second summer circuit. The two dimensional
pyramid filter architecture of order 2N-1 may produce, in operation on respective
clock cycles, at least a pyramid filtered output signal corresponding to the summation
by the first summer circuit of output signals produced by four one-dimensional
pyramid filters of order 2N-1, and a pyramid filtered output signal corresponding
to an output signal produced by summing signal sample matrices of order [2(N-1)-1]
in the second summer circuit. The respective pyramid filtered output signals of
the two dimensional pyramid filter architecture may be summed by the third summer
circuit on respective clock cycles.
