Patent ID: 6226040
Filing Date: 2001-05-01
Classification: G06F,G09G,H04N

Abstract:
Apparatus for generating at least a frame enclosing at least a selected area in a picture, said picture and said selected area being displayed on a video display means, a position, a color and a size of said frame enclosing said selected area can be optionally adjusted, a signal displayed by said video display means being of an analog display format said apparatus comprising:first converting means for controlling a display timing of every pixel of said picture by converting a computer video signal from an analog form to a digital form, said first converting means generating a digital signal and a pointer defining signal, said picture being transferred from said computer video signal, said selected area being defined in said pointer defining signal;first adapting means for adapting a format of said computer video signal to suit a digital display format corresponding to said pointer defining signal;storage means for determining said display timing of all pixels of said picture, said storage means stores said computer video signal corresponding to said pointer defining signal, said storage means also outputs an adapted digital signal including every pixel of said picture;pointer generating means for generating said frame at a plurality of edge of said selected area according to said pointer defining signal, said pointer generating means defines a plurality of colors and brightness of all said pixels of said picture and said selected area, said frame can be moved dynamically according to said pointer defining signal;second converting means for converting an output signal of said pointer generating means to an analog form corresponding to said pointer defining signal; andsecond adapting means for adapting a converted output signal of said pointer generating means to suit said analog display format,wherein said first converting means comprises:an analog to digital converter for converting said computer video signal from said analog form to said digital form;a sampling timing generator for generating a sampling-timing sequence according to said computer video signal, said sampling-timing sequence being used for sampling said computer video signal in said analog to digital converter;processing means for generating a display setting signal and a parameter setting signal according to a displaying-control signal, said processing means being provided to control a parameter used in a video display format; anddisplaying signal generating means for controlling said display timing of every said pixel of said picture by generating a displaying-timing sequence according to said display setting signal, said computer video signal and said sampling timing signal, said displaying signal generating means generates said pointer defining signal, said displaying-timing sequence being included in said pointer defining signals said displaying signal generating means being provided to control a feature including the number, position scope, color and brightness of said selected area.