Patent US5019919A successfully refreshed from Google Patents.
US5019919A
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US
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Apparatus for recording and reproducing divided signals of an angle modulated signal
Assignee: Canon Inc
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Filing: 1987-04-03
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Granted: 1991-05-28
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Expires: 2007-04-03
Abstract
Abstract A recording and/or reproducing apparatus is arranged to simultaneously record on a recording medium a plurality of divided signals which are inverted at different timing points from each other according to the inverting timing of an angle modulated information signal; to reproduce the plurality of divided signal simultaneously from the recording medium; to obtain a restored signal which is inverted according to every inverting timing of the plurality of divided signals reproduced from the recording medium; and to correct the time base of at least one of the plurality of reproduced divided signals on the basis of the restored signal.
Inventors
- 👤 Yoshitake Nagashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:12
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/02; G11B20/06; G11B20/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
An angle modulated signal recording apparatus comprising: (a) input means for receiving an angle modulated signal; (b) converting means for converting said angle modulated signal into a rectangular waveform signal; (c) dividing means for producing a plurality of divided signals by inverting at different timing points according to rectangular waveform signal timing edges, said dividing means including a plurality of registers which are connected in series and operated by the edges of said rectangular waveform signal and taking-out means for taking outputs of said plurality of registers as said divided signals; and (d) recording means for simultaneously recording said plurality of divided signals on one and the same recording medium.
Claim 2
Dependent Claim
110 words
An angle modulated signal recording apparatus comprising: (a) input means for receiving an angle modulated signal; (b) converting means for converting said angle modulated signal into a rectangular waveform signal; (c) dividing means for producing a plurality of divided signals by inverting at different timing points according to rectangular waveform signal timing edges, said dividing means including a plurality of registers which are connected in series and operated by the edges of said rectangular waveform signal and taking-out means for taking outputs of said plurality of registers as said divided signals; and (d) recording means for simultaneously recording said plurality of divided signals on one and the same recording medium.
Claim 3
Dependent Claim
25 words
An apparatus according to claim 1, wherein said dividing means includes a 2n number of said registers and an n number of said taking-out means.
Claim 4
Dependent Claim
30 words
An apparatus according to claim 2, wherein the initial data of said 2n number of registers are arranged to be "1", "1", "0" and "0" in the order of connection.
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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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |