Patent ID: 6498629
Filing Date: 2002-12-24
Classification: H04N

Abstract:
Method for the synchronization of a circuit arrangement with a television signal, the method comprising the following steps:a) deriving a vertical sync signal (Vsync) from a vertical deflection stage of a television set and feeding the vertical sync signal to the circuit arrangement to be synchronized, b) deriving a horizontal sync signal (Hsync) from a horizontal deflection stage of a television set and feeding the horizontal sync signal to the circuit arrangement to be synchronized, c) generating from the vertical sync signal (Vsync) a signal, and delaying the signal by a delay time (reg), d) measuring in the course of the line-by-line display of the video frame in two fields, the time interval (X, Z) between the delayed signal (Vshift) and the directly lagging horizontal sync signal (H1sync, H2sync) in each field, e) calclating the delay time using predetermined rules in response to the measurement results in step d) in such a way that the time interval (X, Z) between the delayed signal (Vshift) and the directly leading horizontal sync signal (Hsync) of a first field and the directly lagging horizontal sync signal (Hsync) of a second field are essentially identical.