US4737864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Still picture recording system with noise detection and frame counting during shift from reproduction of picture in motion to reproduction of still picture including an intermediate slow motion mode
Assignee: Hitachi Microcomputer System Ltd
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Filing: 1986-02-20
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Granted: 1988-04-12
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Expires: 2006-02-20
Abstract
Abstract A still picture reproducing system for a magnetic recording and reproducing apparatus is disclosed. The system sends one frame in order to shift a reproduction mode from ordinary reproduction to reproduction of a still picture by use of so-called "fine slow", sends one more frame if a noise is detected on a picture at this time, and stops if no noise is detected.
Inventors
- 👤 Masataka Sekiya
- 👤 Hideo Nishijima
- 👤 Kaneyuki Okamoto
- 👤 Isao Fukushima
- 👤 Fumiaki Fujii
- 👤 Katsumi Sera
- 👤 Takashi Furutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:28
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/783; G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A still picture reproducing system for a magnetic recording and reproducing apparatus comprising: means for sequentially recording video signals in the unit of one field as oblique tracks on a magnetic tape; slow motion reproduction means for intermittently reproducing the recorded video signals in the unit of said recording track, said intermittent slow motion reproduction means being used in a shift period from ordinary reproduction to reproduction of a still picture; noise position detection means for detecting the drop position of a signal level reproduced from said magnetic tape during the intermittent slow motion reproduction; means for judging that said noise detection position does not exist at least within a predetermined range, and for stopping said intermittent slow motion reproduction means; and a counter for counting the number of frames sent by said intermittent slow motion reproduction means, said intermittent slow motion reproduction means being stopped when said counter reaches a predetermined count value.
Claim 2
Dependent Claim
154 words
A still picture reproducing system for a magnetic recording and reproducing apparatus comprising: means for sequentially recording video signals in the unit of one field as oblique tracks on a magnetic tape; slow motion reproduction means for intermittently reproducing the recorded video signals in the unit of said recording track, said intermittent slow motion reproduction means being used in a shift period from ordinary reproduction to reproduction of a still picture; noise position detection means for detecting the drop position of a signal level reproduced from said magnetic tape during the intermittent slow motion reproduction; means for judging that said noise detection position does not exist at least within a predetermined range, and for stopping said intermittent slow motion reproduction means; and a counter for counting the number of frames sent by said intermittent slow motion reproduction means, said intermittent slow motion reproduction means being stopped when said counter reaches a predetermined count value.
Claim 3
Dependent Claim
148 words
A still picture reproducing system for a magnetic recording and reproducing apparatus comprising: means for sequentially recording video signals of one field as oblique tracks on a magnetic tape; slow motion reproduction means for reproducing said video signals during a shift period from ordinary reproduction to reproduction of a still picture; noise position detection means for detecting a position of a drop in a signal level produced from said magnetic tape during reproduction by said slow motion reproduction means; means for determining whether said noise detection position is within a predetermined range and for stopping reproduction by said slow motion reproduction means when said noise detection position is not within said predetermined range; and counter means for counting the number of frames fed through said slow motion reproduction means and for stopping reproduction by said slow motion reproduction means when said counter means reaches a predetermined count value.
Claim 4
Dependent Claim
148 words
A still picture reproducing system for a magnetic recording and reproducing apparatus comprising: means for sequentially recording video signals of one field as oblique tracks on a magnetic tape; slow motion reproduction means for reproducing said video signals during a shift period from ordinary reproduction to reproduction of a still picture; noise position detection means for detecting a position of a drop in a signal level produced from said magnetic tape during reproduction by said slow motion reproduction means; means for determining whether said noise detection position is within a predetermined range and for stopping reproduction by said slow motion reproduction means when said noise detection position is not within said predetermined range; and counter means for counting the number of frames fed through said slow motion reproduction means and for stopping reproduction by said slow motion reproduction means when said counter means reaches a predetermined count value.
References Cited (Backward Citations)
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US4306255A
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JPS5642476A
Cited
US4531162A
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US4617598A
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US4495525A
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US4636874A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |