US5294997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image signal with pilot signal recording apparatus
Assignee: Canon Inc
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Filing: 1992-10-30
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Granted: 1994-03-15
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Expires: 2012-10-30
Abstract
Abstract An image signal recording and reproducing system which records on a recording medium one picture amount of high definition image signal composed of a plurality of different field image signals and is arranged as follows: in recording the field image signals in different areas on the recording medium respectively, a modulated carrier signal modulated with an information signal other than an image signal is recorded in a state of being multiplexed with one part of the field image signals; and a pilot signal for correcting time base variations is recorded in a state of being multiplexed with the other part of the field image signals. This arrangement enables the system to record and reproduce information other than the image signal and to reproduce an image with a high degree of fineness by accurately correcting time base variations occurring during recording and reproduction.
Inventors
- 👤 Tokihiko Ogura
- 👤 Kazuhito Ohashi
- 👤 Ryo Fujimoto
- 👤 Takao Sasakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:05
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10009; G11B20/10046; G11B20/10203; G11B20/10305; G11B20/10398; G11B20/10425; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/917; H04N5/919; H04N5/93; H04N5/937; H04N5/95; H04N5/956; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2508; G11B2220/2512; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3212; H04N2201/3214; H04N2201/3215; H04N2201/3225; H04N2201/3226; H04N2201/3274; H04N2201/3277
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
165 words
An image signal recording apparatus for recording, on recording medium, one picture amount of an image signal composed of a plurality of field image signals different from each other, comprising: a) pilot signal generating means for generating a pilot signal for correcting time base variations, which is different from a horizontal synchronizing signal; b) modulated carrier signal generating means for generating a modulated carrier signal modulated with an information signal other than an image signal; and c) recording means, arranged to input the plurality of field image signals, for recording the plurality of field image signals in different areas on the recording medium respectively, said recording means recording the modulated carrier signal generated by said modulated carrier signal generating means in a state of being multiplexed with one part of the plurality of field image signals and recording the pilot signal generated by said pilot signal generating means in a state of being multiplexed with the other part of the plurality of field image signals.
Claim 2
Dependent Claim
165 words
An image signal recording apparatus for recording, on recording medium, one picture amount of an image signal composed of a plurality of field image signals different from each other, comprising: a) pilot signal generating means for generating a pilot signal for correcting time base variations, which is different from a horizontal synchronizing signal; b) modulated carrier signal generating means for generating a modulated carrier signal modulated with an information signal other than an image signal; and c) recording means, arranged to input the plurality of field image signals, for recording the plurality of field image signals in different areas on the recording medium respectively, said recording means recording the modulated carrier signal generated by said modulated carrier signal generating means in a state of being multiplexed with one part of the plurality of field image signals and recording the pilot signal generated by said pilot signal generating means in a state of being multiplexed with the other part of the plurality of field image signals.
Claim 3
Dependent Claim
42 words
An apparatus according to claim 1, wherein said modulated carrier signal generating means is arranged to form the modulated carrier signal by modulating the pilot signal generated by said pilot signal generating means with an information signal other than an image signal.
Claim 4
Dependent Claim
36 words
An apparatus according to claim 1, wherein said recording means is arranged to record the plurality of field image signals respectively in a plurality of tracks formed in parallel to each other on the recording medium.
Claim 5
Dependent Claim
74 words
An apparatus according to claim 3, wherein said recording means is further arranged to record, in a state of being multiplexed with the field image signals, the modulated carrier signal generated by said modulated carrier signal generating means at least in two adjacent tracks among the plurality of tracks on the recording medium and the pilot signal generated by said pilot signal generating means at least in one track of the plurality of tracks.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 1, wherein said recording medium includes a disc-shaped recording medium.
Claim 7
Dependent Claim
179 words
An image signal recording apparatus for recording, on a disc-shaped recording medium having a plurality of concentrically formed tracks, one picture amount of an image signal composed of four-field image signals different from each other, comprising: a) pilot signal generating means for generating a pilot signal for correcting time base variations, which is different from a horizontal synchronizing signal; b) modulated carrier signal generating means for generating a modulated carrier signal modulated with an information signal other than an image signal; and c) recording means, arranged to input the four-field image signals, for recording the four-field image signals in four tracks of the plurality of tracks formed on the disc-shaped recording medium respectively, said recording means recording the modulated carrier signal generated by said modulated carrier signal generating means in two central tracks of said four tracks in a state of being multiplexed with the field image signals and recording the pilot signal generated by said pilot signal generating means in two side tracks of said four tracks in a state of being multiplexed with the field image signals.
Claim 8
Dependent Claim
179 words
An image signal recording apparatus for recording, on a disc-shaped recording medium having a plurality of concentrically formed tracks, one picture amount of an image signal composed of four-field image signals different from each other, comprising: a) pilot signal generating means for generating a pilot signal for correcting time base variations, which is different from a horizontal synchronizing signal; b) modulated carrier signal generating means for generating a modulated carrier signal modulated with an information signal other than an image signal; and c) recording means, arranged to input the four-field image signals, for recording the four-field image signals in four tracks of the plurality of tracks formed on the disc-shaped recording medium respectively, said recording means recording the modulated carrier signal generated by said modulated carrier signal generating means in two central tracks of said four tracks in a state of being multiplexed with the field image signals and recording the pilot signal generated by said pilot signal generating means in two side tracks of said four tracks in a state of being multiplexed with the field image signals.
Claim 9
Dependent Claim
42 words
An apparatus according to claim 6, wherein said modulated carrier signal generating means is arranged to form the modulated carrier signal by modulating the pilot signal generated by said pilot signal generating means with an information signal other than an image 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) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |