Television – Synchronization – Sync separation
Reexamination Certificate
2006-05-16
2006-05-16
Lee, Michael H. (Department: 2614)
Television
Synchronization
Sync separation
C348S534000
Reexamination Certificate
active
07046301
ABSTRACT:
A vertical synchronous signal detection circuit includes an analog-digital converter, an average calculation circuit and a compare circuit. The analog-digital converter receives a composite video signal and converts the video signal into a digital signal having a vertical synchronizing pulse. The average calculation circuit is coupled to receive the digital signal. The average calculation circuit calculates an average level of the vertical synchronizing pulse within a predetermined period. The compare circuit is connected to the average calculation circuit. The compare circuit compares a threshold level received thereto with the average level and outputs a synchronous detect signal when the average level falls below the threshold level.
REFERENCES:
patent: 3809808 (1974-05-01), Arpin
patent: 4858008 (1989-08-01), Sieben et al.
patent: 5031041 (1991-07-01), Fling
patent: 5576770 (1996-11-01), Rumreich
patent: 5754251 (1998-05-01), Hulvey
patent: 05-022627 (1993-01-01), None
patent: 05-276407 (1993-10-01), None
patent: 08-051555 (1996-02-01), None
patent: 09-214998 (1997-08-01), None
patent: 09-233364 (1997-09-01), None
patent: 11-196288 (1999-07-01), None
Lee Michael H.
Oki Electric Co., Ltd.
Rabin & Berdo P.C.
LandOfFree
Vertical synchronous signal detection circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vertical synchronous signal detection circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertical synchronous signal detection circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3540406