Method for recognizing video signal timing of analog input

A method for recognizing video signal timing of analog input applied on displays, using horizontal-synchronized-signal interrupt value to determine inputted signal timing, comprising steps as follows:

• (A) determining whether an inputted signal timing is altered;
• (B) checking whether said altered signal timing is a default signal timing;
• (C) deleting said horizontal-synchronized-signal interrupt value;
• (D) detecting whether a vertical synchronized signal is a positive trigger;
• if said vertical synchronized signal is not a positive trigger, continuing to detect said vertical synchronized signal until it becomes a positive trigger;
• (E) determining whether said horizontal-synchronized-signal interrupt value is an initial value;
• if true, initiating an enumerated horizontal-synchronized-signal interrupt program and repeating step (D);
• if not true, terminating horizontal-synchronized-signal interrupt value counts and obtaining a horizontal-synchronized-signal interrupt value;
• (F) whenever an interrupt program is interrupted by a horizontal synchronized signal, increasing and accumulating said horizontal-synchronized-signal interrupt value;
• (G) determining whether said horizontal-synchronized-signal interrupt value is greater than a default value;
• if true, then said inputted signal timing is a first pixel value;
• if not true;
• then said inputted signal timing is a second pixel value;
• and
• (H) terminating enumerations of horizontal-synchronized-signal interrupts.