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1. (WO1999012344) SYNCHRONIZING SIGNAL GENERATOR

Pub. No.:    WO/1999/012344    International Application No.:    PCT/JP1998/003780
Publication Date: Mar 11, 1999 International Filing Date: Aug 26, 1998
IPC: H04N 5/06
H04N 5/12
Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

YAMAGUCHI, Kazunari

Inventors: YAMAGUCHI, Kazunari

Title: SYNCHRONIZING SIGNAL GENERATOR
Abstract:
A synchronizing signal generator capable of generating a vertical synchronizing pulse having a stable phase relative to a horizontal synchronizing signal, and having a counter whose amount of count is small for counting the clocks synchronized with the horizontal synchronizing signal, so as to process the image signal of a computer display, or the like. The generator is provided with a counter (8R) for measuring the vertical synchronization interval (N) based on a horizontal synchronizing signal (Hsync), and an output switch (14) for selectively outputting a vertical synchronizing pulse (Vd) synchronized with an inputted vertical synchronizing signal (Vsync) when this signal (Vsync) has a vertical synchronization interval in a specified range, otherwise outputting a pulse (Sq) having a specified vertical synchronization interval.