The present invention relates to an elementary cell of a linear filter for
image processing, as well as to a corresponding module, element and
process. The cell comprises a data circulation output and a calculation
output, as well as a main delay line and an auxiliary delay line in
parallel. Delay line selection means (MUX4) make it possible to link the
input of the cell to the circulation output by way of one or other of the
delay lines. The cell also comprises an adder having two inputs which can
be linked respectively to the input of the cell and to the output of the
main delay line, by calculation selection means (MUX1, MUX2) and a
multiplier at the output of the adder, connected to a multiplier
coefficients memory. Application to linear filtering for image processing
and to random access for motion compensation.