Patent ID: 6621927
Filing Date: 2003-09-16
Classification: G06K

Abstract:
An image displaying apparatus having a detecting circuit which detects, from video signals which represent a picture having an image portion including image information and an imageless portion where no image information is contained, a boundary position in a vertical direction between said image portion and said imageless portion, and which performs a display control of said video signals using signals from the detecting circuit, wherein, said detecting circuit includes:a line decision circuit that decides whether a line belongs to said image portion or said imageless portion for horizontal lines of said video signals; and a boundary decision circuit, being connected to said line decision circuit, for detecting said boundary position using decided results outputted from said line decision circuit, said image displaying apparatus comprising: a storage circuit which stores said decided results as to plural lines outputted from said line decision circuit, a change point detection circuit which detects both a first boundary position indicating a start of said image portion and a second boundary position indicating an end of said image portion, using said decided results as to plural lines within a predetermined range, which are read out from said storage circuit, and an integration circuit for integrating, over a plurality of fields, said first boundary position and said second boundary position detected by said change point detection circuit, so as to calculate average levels of both positions, and for outputting said average levels as said start of said image portion and said end of said image portion, respectively.