Patent ID: 6212325
Filing Date: 2001-04-03
Classification: H04N

Abstract:
An apparatus for processing a video signal for limiting recording of a video signal for an analog output from a video signal source, comprising:means for generating a copyguard signal;selector means for replacing a color burst signal of said video signal with said copyguard signal; and wherein said signal generating means operates to generate said copyguard signal composed of at least two kinds of modulations of a first phase, said two kinds of modulations comprising at least two of a U-axis inverted burst signal produced by inverting a U-axis component of a burst phase, a V-axis inverted burst signal produced by inverting a V-axis component, and a both-axes inverted burst signal produced by inverting a U-axis/V-axis as a copyguard signal at each horizontal scanning period, said copyguard signal having a different phase from an original phase of said color burst signal of said video signal.