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US 4,357,630 AGranted
Method for detecting vertical synchronizing signal
AssigneeSony Corporation
InventorKentaro Odaka
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Abstract
A vertical synchronizing signal detecting method is disclosed which comprises the steps of detecting a unit signal from a complex synchronizing signal including a vertical synchronizing signal formed of a predetermined number of continuous unit signals each having a predetermined waveform, counting a number of the unit signals, and producing a detecting signal having a predetermined timing relation to the vertical synchronizing signal when it is detected that the unit signals continuously arrive with the above predetermined number.
Claims3
A vertical synchronizing signal detecting method comprising the steps of:
- detecting a unit signal from a complex synchronizing signal including a vertical synchronizing signal formed of a predetermined number of continuous unit signals each having a predetermined waveform;
- counting a number of said unit signals;
- and producing a detecting signal having a predetermined timing relation to said vertical synchronizing signal when it is detected that said unit signals continuously arrive with the above predetermined number.
Dependencies are inferred from the claim text.