A method for picture-in-picture insertion is described, which is
distinguished in particular by the fact that
the inset pictures are written to a memory device (2) in a circulating
manner under continuously incremented write addresses,
the first and last address of each written-in inset picture is stored,
an overtake signal is formed by comparing the instantaneous address with
the previously stored address, said signal indicating whether a previous
address has been reached again and, consequently, the corresponding
picture content has been overwritten,
by evaluation of the overtake signal, the current or preceding segment is
selected for read-out depending on whether or not overtaking took place
before the start of the read-out, and
the inset picture stored in the selected segment is read out with
continuously incremented read addresses and is inserted into the main
picture. A corresponding circuit arrangement is also described.
