US4897739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-channel recording apparatus using a plurality of heads in turn
Assignee: Canon Inc
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Filing: 1987-04-03
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Granted: 1990-01-30
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Expires: 2007-04-03
Abstract
Abstract A multi-channel recording apparatus in which n rotary heads (n is 3 or higher integer) are arranged on the outer peripheral edge of a drum in evenly spaced relation, and a tape-shaped recording medium is trained round the drum over an angular range of at least 360°×(1-1/n), while recording (n-1) channels of a signal on the recording medium by using the (n-1) of the n heads which are simultaneously tracing on the medium.
Inventors
- 👤 Masahide Hasegawa
- 👤 Mitsuhiro Otokawa
- 👤 Hidetoshi Matsuoka
- 👤 Noritsugu Hirata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:20
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/00865; G11B15/00; G11B15/02; G11B15/05; G11B15/087; G11B15/18; G11B15/1808; G11B15/1875; G11B15/46; G11B15/467; G11B15/4673; G11B15/4675; G11B15/4676; G11B15/4677; G11B15/4678; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/917; H04N5/919
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A multi-channel recording apparatus comprising: (a) a cylinder member having n rotary heads (where n is an integer of not less than 3) on its outer peripheral surface to rotate with a phase difference of (360/n)° from each other; (b) a tape guide member training a tape-shaped recording medium around said cylinder member over an angular range of not less than (360(n-1)/n)°; (c) means for inputting (n-1) channels of a signal; and (d) recording means including supply means capable of supplying the inputted signals of (n-1) channels to the (n-1) of said n heads which are tracing on said recording medium, said supply means including (n-1) switching means for circulating supply of said signals of (n-1) channels to each of said n heads.
Claim 2
Dependent Claim
123 words
A multi-channel recording apparatus comprising: (a) a cylinder member having n rotary heads (where n is an integer of not less than 3) on its outer peripheral surface to rotate with a phase difference of (360/n)° from each other; (b) a tape guide member training a tape-shaped recording medium around said cylinder member over an angular range of not less than (360(n-1)/n)°; (c) means for inputting (n-1) channels of a signal; and (d) recording means including supply means capable of supplying the inputted signals of (n-1) channels to the (n-1) of said n heads which are tracing on said recording medium, said supply means including (n-1) switching means for circulating supply of said signals of (n-1) channels to each of said n heads.
Claim 3
Dependent Claim
39 words
An apparatus according to claim 1, wherein said (n-1) switching means are arranged to select one of said n heads for supply of one of said signals of (n-1) channels thereto each time said rotary heads each rotate (360/n)°.
Claim 4
Dependent Claim
30 words
An apparatus according to claim 1, wherein said (n-1) channels of a signal includes a video signal, and said n rotary heads each rotate (360(n-1)/n)° in one vertical synchronous period.
Claim 5
Dependent Claim
36 words
An apparatus according to claim 3, wherein said (n-1) channels of a signal include respective (n-1) channels of a video signal whose vertical synchronizing signals are shifted 1/(n-1) of the vertical synchronous period from each other.
Claim 6
Dependent Claim
112 words
A multi-channel recording apparatus comprising: (a) n rotary recording heads (where n is an integer of not less than 3) for rotating with a phase difference of (360/n)° from each other; (b) input means for inputting (n-1) channels of a video signal; (c) timing control means arranged to receive said (n-1) channels of the video signal, for outputting (n-1) channels of a video signal whose vertical synchronizing signals are shifted 1/(n-1) of the vertical synchronizing period from each other; (d) recording means including (n-1) switching means for respectively supplying said (n-1) channels of the video signal outputted from said timing control means to each of said n rotary recording heads in turn.
Claim 7
Dependent Claim
112 words
A multi-channel recording apparatus comprising: (a) n rotary recording heads (where n is an integer of not less than 3) for rotating with a phase difference of (360/n)° from each other; (b) input means for inputting (n-1) channels of a video signal; (c) timing control means arranged to receive said (n-1) channels of the video signal, for outputting (n-1) channels of a video signal whose vertical synchronizing signals are shifted 1/(n-1) of the vertical synchronizing period from each other; (d) recording means including (n-1) switching means for respectively supplying said (n-1) channels of the video signal outputted from said timing control means to each of said n rotary recording heads in turn.
Claim 8
Dependent Claim
61 words
An apparatus according to claim 5, wherein said timing control means includes separation means for separating vertical synchronizing signals of said (n-1) channels of the video signal outputted from said timing control means, said timing control means shifts timings of at least (n-2) of (n-1) channels of the video signal by using said vertical synchronizing signals separated by said separation means.
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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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |