Video signal synchronization extraction device

PCT No. PCT/FR94/00658 Sec. 371 Date Apr. 2, 1996 Sec. 102(e) Date Apr. 2, 1996 PCT Filed Jun. 3, 1994 PCT Pub. No. WO94/30005 PCT Pub. Date Dec. 22, 1994A device for extracting synchronization from a video signal. The device includes a dual-threshold synchronization pulse detection circuit, a first...

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Hauptverfasser:	MEUNIER, THIERRY
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION
Online-Zugang:	Volltext bestellen
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Zusammenfassung:	PCT No. PCT/FR94/00658 Sec. 371 Date Apr. 2, 1996 Sec. 102(e) Date Apr. 2, 1996 PCT Filed Jun. 3, 1994 PCT Pub. No. WO94/30005 PCT Pub. Date Dec. 22, 1994A device for extracting synchronization from a video signal. The device includes a dual-threshold synchronization pulse detection circuit, a first threshold device for detecting the leading edge of a pulse, and a second threshold device for detecting the trailing edge of the same pulse. The thresholds of the devices are defined by a synchronization pulse amplitude detector. The device includes sample-and-hold circuitry for bringing back the voltage stored by the amplitude detector in a storage capacitor to the voltage corresponding to the synchronization pulse, when a synchronization pulse is detected.