Patent ID: 6292225
Filing Date: 2001-09-18
Classification: G09G,H04N

Abstract:
A system for horizontally aligning a first video signal with a second video signal when said first video signal overlays said second video signal on a display, said system comprising:a phase-locked loop having a reference frequency input terminal coupled to a first horizontal synchronization signal of said first video signal, a feedback frequency input terminal, and a clock output terminal providing a first clock signal;a frame controller having an input terminal coupled to said clock output terminal of said phase-locked loop and an output terminal providing a second horizontal synchronization signal; anda delay circuit having an input terminal coupled to said output terminal of said frame controller and an output terminal coupled to said feedback frequency input terminal of said phase-locked loop;wherein said delay circuit introduces a delay value to said second horizontal synchronization signal for adjusting a phase of said second video signal.