Television – Synchronization – Automatic phase or frequency control
Patent
1996-10-03
1999-06-29
Lee, Michael
Television
Synchronization
Automatic phase or frequency control
348537, 348540, 348549, H04N 944, H03L 700
Patent
active
059175508
ABSTRACT:
A clock signal generator and method for generating a clock signal which is synchronized with an input composite video signal. The generator comprises a synchronizing separator for separating a horizontal synchronizing signal from an input composite video signal; a burst separator for separating a color burst signal from the input composite video signal; a phase error detector for receiving the horizontal synchronizing signal, detecting a phase error and outputting a phase error signal for a previous horizontal period; a phase change detector for receiving the color burst signal, detecting a phase change of the color burst signal, and outputting a phase change signal for a present horizontal period; an adder for adding the phase error signal and the phase change signal; and a clock signal generator for receiving an output of the adding means and generating a clock signal which is synchronized with the input composite video signal.
REFERENCES:
patent: 4015288 (1977-03-01), Ebihara et al.
patent: 4069499 (1978-01-01), Nimomiya
patent: 4647984 (1987-03-01), Suzuki et al.
patent: 4847678 (1989-07-01), McCauley
patent: 5025310 (1991-06-01), Sekiya et al.
Lee Michael
Samsung Electronics Co,. Ltd.
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