Patent US5272576A successfully refreshed from Google Patents.
US5272576A
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Magnetic recording and reproducing apparatus with recording inhibition operation
Assignee: Hitachi Ltd
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Filing: 1990-11-27
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Granted: 1993-12-21
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Expires: 2010-11-27
Abstract
Abstract A recording or reproducing of an input video signal is prohibited in a recording mode operation when a recording inhibition signal is attached thereto and, when a mode other than the recording mode is set, the video signal of optimum level can be supplied to a television receiver even if the recording inhibition signal is attached to the video signal so that a sufficient monitoring becomes possible.
Inventors
- 👤 Susumu Ohtsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:14
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; G; G11; G11B; G11B15/00; G11B15/02; G11B15/04; G11B20/00; G11B20/00086; H04N5/913; H04N2005/91307; H04N2005/91314; H04N5/93; H04N5/931
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
In a magnetic recording and reproducing apparatus having a recording mode setting means and a recording inhibition signal producing means, a circuit arrangement comprising; an automatic gain control circuit for setting an input video signal at an optimum level for recordation; recording inhibition means responsive to a recording inhibition signal attached to the input video signal for controlling said automatic gain control circuit to lower the level of the input video signal to thereby prevent a recordation of the input video signal; and means for making said recording inhibition means responsive to said recording inhibition signal only when a recording mode of operation is set.
Claim 2
Dependent Claim
105 words
In a magnetic recording and reproducing apparatus having a recording mode setting means and a recording inhibition signal producing means, a circuit arrangement comprising; an automatic gain control circuit for setting an input video signal at an optimum level for recordation; recording inhibition means responsive to a recording inhibition signal attached to the input video signal for controlling said automatic gain control circuit to lower the level of the input video signal to thereby prevent a recordation of the input video signal; and means for making said recording inhibition means responsive to said recording inhibition signal only when a recording mode of operation is set.
Claim 3
Dependent Claim
91 words
A circuit arrangement according to claim 1, wherein said means for making said recording inhibition means responsive to said recording inhibition signal only when a recording mode of operation is set comprises a recording inhibition signal detecting means and an AND gate having an operation mode setting input for receiving an operation mode setting signal and an input connected to an output of said recording inhibition signal detecting means and providing an output signal for making said recording inhibition signal effective when the operation mode setting signal sets the recording mode.
References Cited (Backward Citations)
US4631603A
Cited
US4979210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-20 | 1997-06-21 | 1997-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-20 | 2001-06-21 | 2001-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-20 | 2005-06-21 | 2005-12-21 | $7700.00 | Window Closed / Lapsed |