Patent ID: 7023490

Claim:
A picture processing apparatus, comprising: input means for inputting a plurality of input video signals; determining means for determining whether each of said plurality of input video signal includes a non-picture portion added to the periphery of an effective picture area; a picture memory for storing said plurality of input video signals; and picture processing means for extracting a signal of the effective picture area from the plurality of input video signals, and when the result of said determining means represents that at least one of the input video signals includes a non-picture portion added to the periphery of the effective picture area, said picture processing means adjusts the picture size using the signal of the effective picture area of the at least one of the input video signals, by writing said input video signals to a picture memory, thinning out or interpolating video signals therein at proper timings, and reading the resultant video signal, wherein said picture processing means performs a multiple-picture displaying process for simultaneously displaying pictures corresponding to the plurality of input video signals interpolated at proper timings so that desired picture sizes are obtained corresponding to display positions on a background screen.