Patent US4357630A successfully refreshed from Google Patents.
US4357630A
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Method for detecting vertical synchronizing signal
Assignee: Sony Corp
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Filing: 1981-05-20
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Granted: 1982-11-02
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Expires: 2001-05-20
Abstract
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.
Inventors
- 👤 Kentaro Odaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:49
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/08; H04N5/10; H04N9/00; H04N9/64; H04N9/642
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
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.
Claim 2
Dependent Claim
75 words
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.
Claim 3
Dependent Claim
36 words
A vertical synchronizing signal detecting method according to claim 1 further comprising the step of detecting the number of said continuous unit signals to thereby distinguishing between vertical synchronizing signals having different numbers of unit signals.
Claim 4
Dependent Claim
32 words
A vertical synchronizing signal detecting method as claimed in claim 1, wherein said complex synchronizing signal is contained in a composite PCM signal which includes a PCM signal as a main signal.
References Cited (Backward Citations)
US4240111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |