US5274450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for converting synchronizing signal
Assignee: Elbex Video Ltd
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Filing: 1991-12-31
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Granted: 1993-12-28
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Expires: 2011-12-31
Abstract
Abstract In a converting method and apparatus therefor, synchronizing signal is received from an external synchronizing signal generator, which includes a circuit which generates two or more frequency signals, and alternately transmits these signals to the converting apparatus. The apparatus includes a decoder circuit for decoding an alternating rate of the frequency signals, outputted from the external synchronizing signal generator, and generating a new synchronizing pulse signal on the basis of the decoded signal. The new synchronizing pulse signal which has a level higher than the white level or lower than the black level of a composite video signal, generated by the TV camera, is injected into a video transmission line connected to the TV camera for synchronizing the latter on the basis of the injected synchronizing pulse.
Inventors
- 👤 David Elberbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:24
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/06; H04N5/067; H04N5/073
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
A method for converting at least two repeatedly alternating frequency signals into a new synchronizing pulse for synchronizing a television camera of a plurality of television cameras to be synchronized with one another, wherein each camera includes means for generating a composite video signal, the method comprising the steps of: receiving said repeatedly alternating frequency signals from means for generating said alternating frequency signals; decoding an alternating rate of said signals on the basis of said at least two frequency signals to produce a decoded signal and generating on the basis of said decoded signal a frame synchronizing pulse having a level higher than the while level or lower than the black level of the composite video signal generated by said television camera; and injecting said frame synchronizing pulse into a video transmission line connected to said television camera for synchronizing said television camera on the basis of the injected frame synchronizing pulse.
Claim 2
Independent Claim
153 words
A method for converting at least two repeatedly alternating frequency signals into a new synchronizing pulse for synchronizing a television camera of a plurality of television cameras to be synchronized with one another, wherein each camera includes means for generating a composite video signal, the method comprising the steps of: receiving said repeatedly alternating frequency signals from means for generating said alternating frequency signals; decoding an alternating rate of said signals on the basis of said at least two frequency signals to produce a decoded signal and generating on the basis of said decoded signal a frame synchronizing pulse having a level higher than the while level or lower than the black level of the composite video signal generated by said television camera; and injecting said frame synchronizing pulse into a video transmission line connected to said television camera for synchronizing said television camera on the basis of the injected frame synchronizing pulse.
Claim 3
Independent Claim
118 words
An apparatus for converting at least two repeatedly alternating frequency signals into a new synchronizing pulse signal for synchronizing a television camera of a plurality of television cameras to be synchronized with one another, wherein each camera includes a generating circuit for generating a composite video signal, the apparatus comprising: first signal processing means receiving said repeatedly alternating frequency signals from means generating said alternating frequency signals and decoding an alternating rate of said signals on the basis of said at least two frequency signals to produce a decoded signal; and second signal processing means receiving said decoded signal and generating said new synchronizing pulse signal for synchronizing the television camera on the basis of the decoded signal.
Claim 4
Independent Claim
118 words
An apparatus for converting at least two repeatedly alternating frequency signals into a new synchronizing pulse signal for synchronizing a television camera of a plurality of television cameras to be synchronized with one another, wherein each camera includes a generating circuit for generating a composite video signal, the apparatus comprising: first signal processing means receiving said repeatedly alternating frequency signals from means generating said alternating frequency signals and decoding an alternating rate of said signals on the basis of said at least two frequency signals to produce a decoded signal; and second signal processing means receiving said decoded signal and generating said new synchronizing pulse signal for synchronizing the television camera on the basis of the decoded signal.
Claim 5
Dependent Claim
56 words
A signal converting apparatus according to claim 2, and further comprising third signal processing means receiving said pulse signal and generating, on the basis of the received pulse signal, a frame synchronizing pulse having a level higher than the white level or lower than the black level of the composite video signal of said television camera.
Claim 6
Dependent Claim
49 words
A signal converting apparatus according to claim 3, and further comprising forth signal processing means receiving a video signal transmitted from said television camera and injecting said frame synchronizing pulse into the received video signal within a period corresponding to a vertical blanking interval in said composite video signal.
Claim 7
Dependent Claim
37 words
A signal converting apparatus according to claim 4, and further comprising fifth signal processing means receiving a signal outputted from said third signal processing means and clipping and removing said frame synchronizing pulse from the received signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-27 | 1997-06-28 | 1997-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-27 | 2001-06-28 | 2001-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-27 | 2005-06-28 | 2005-12-28 | $7700.00 | Window Closed / Lapsed |