Patent ID: 6035094
Filing Date: 2000-03-07
Classification: H04N

Abstract:
A video signal processing apparatus for restricting recording of an analog color video signal output from a video signal source and having successive fields each comprised of predetermined numbers of lines at least some of which contain a normal color burst signal of a predetermined normal phase, said apparatus comprising:means for generating a color burst signal having a phase which is partially inverted in respect to said predetermined normal phase;means for placing said color burst signal having said partially inverted phase in selected lines of at least some of said fields; andmeans for interspersing said lines in which said color burst signal having the partially inverted phase is placed with at least one of said lines containing a color burst signal of said normal phase being interposed between each two successive lines having said color burst signal with the partially inverted phase such that there are never two of said lines having said color burst signal with the partially inverted phase together so that a copy protection signal is defined by said lines in which said color burst signal with the partially inverted phase is placed and said at least one line with said color burst signal of the normal phase interposed therebetween to permit a color television monitor to correctly display said analog color video signal while a video signal recording/reproducing device cannot correctly record/reproduce the analog color video signal output from said source.