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US4819086A
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Multirecording method eliminating striped-pattern interference
Assignee: Pioneer Corp
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Filing: 1987-10-19
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Granted: 1989-04-04
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Expires: 2007-10-19
Abstract
Abstract A multirecording method in which a multiplex sub-Nyquist-sampling video signal is multirecorded together with a predetermined signal, such as a pilot or audio signal, with no generation of striped-pattern interference in the reproduced picture. In accordance with the invention, the frequency of the predetermined signal is set at m/(2n+1) times as high as the horizontal scanning frequency of the video signal, where n is a natural number of m is a natural number other than an integral multiple of (2n+1).
Inventors
- 👤 Hideki Hayashi
- 👤 Tsutomu Honda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:27
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/81; H04N9/797; H04N9/87
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
In a multirecording method in which a multiplex sub-Nyquist-sampling video signal corresponding to sampling values obtained by performing sampling a plurality of times as to be mutually interpolated with a predetermined relation in sampling position between continued plural fields of video signals is multirecorded on a recording medium together with a predetermined signal, the improvement in which a frequency of said predetermined signal is set to be m/(2n+1) times as high as a horizontal scanning frequency of said video signal, n being a natural number, and m being a natural number other than integral multiples of (2n+1).
Claim 2
Dependent Claim
97 words
In a multirecording method in which a multiplex sub-Nyquist-sampling video signal corresponding to sampling values obtained by performing sampling a plurality of times as to be mutually interpolated with a predetermined relation in sampling position between continued plural fields of video signals is multirecorded on a recording medium together with a predetermined signal, the improvement in which a frequency of said predetermined signal is set to be m/(2n+1) times as high as a horizontal scanning frequency of said video signal, n being a natural number, and m being a natural number other than integral multiples of (2n+1).
Claim 3
Dependent Claim
16 words
The multirecording method according to claim 1, in which n is 1 and m is 200.
Claim 4
Dependent Claim
21 words
The multirecording method according to claim 1, in which said predetermined signal is a pilot signal for correcting a time-axis error.
Claim 5
Dependent Claim
16 words
The multirecording method according to claim 1, in which said predetermined signal is an audio signal.
Claim 6
Dependent Claim
17 words
The multirecording method according to claim 1, in which said recording medium is an optical video disk.
Claim 7
Dependent Claim
16 words
The multirecording method according to claim 1, in which said multiplex sub-Nyquist-sampling video signal is frequency-modulated.
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |