Patent US3846819A successfully refreshed from Google Patents.
US3846819A
Expired / Lapsed
US
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Method for recording two separate signals
Assignee: RCA Licensing Corp
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Filing: 1970-06-29
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Granted: 1974-11-05
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Expires: 1990-06-29
Abstract
Abstract A system and method is provided for recording both the luminance and color information components of a color television signal in a single track of a magnetic tape. The color components are recorded substantially throughout the magnetizable tape coating, while the luminance component is recorded substantially only in the surface of the magnetizable coating of the tape.
Inventors
- 👤 H Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:48
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53; G11B5/531; G11B5/534; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/78213; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/91; H04N5/92; H04N9/00; H04N9/79; H04N9/80; H04N9/802; H04N9/82; H04N9/825; H04N9/83; H04N9/86
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
142 words
A method of recording two separate signals of respectively long and short wavelength frequency content on a tape record having a magnetizable coating comprising the steps of: recording the long wavelength frequency signals substantially into the thickness of the magnetizable tape coating and sequentially in a first group of parallel aligned tracks on said tape, adjacent pairs of tracks in said first group being separated by a first guard band therebetween, and then recording the short wavelength frequency signals substantially into the surface layer of said magnetizable coating and sequentially in the second group of parallel aligned tracks on said tape, each of the tracks in said second group encompassing different portions of two adjacent tracks in said first group and the first guard band therebetween, adjacent pairs of tracks in said second group being separated by a second guard band therebetween.
Claim 2
Independent Claim
142 words
A method of recording two separate signals of respectively long and short wavelength frequency content on a tape record having a magnetizable coating comprising the steps of: recording the long wavelength frequency signals substantially into the thickness of the magnetizable tape coating and sequentially in a first group of parallel aligned tracks on said tape, adjacent pairs of tracks in said first group being separated by a first guard band therebetween, and then recording the short wavelength frequency signals substantially into the surface layer of said magnetizable coating and sequentially in the second group of parallel aligned tracks on said tape, each of the tracks in said second group encompassing different portions of two adjacent tracks in said first group and the first guard band therebetween, adjacent pairs of tracks in said second group being separated by a second guard band therebetween.
Claim 3
Dependent Claim
25 words
A recording method as defined in claim 1 wherein the width of each of the tracks in group 1 and group 2 is substantially equal.
Claim 4
Dependent Claim
36 words
A method of recording as defined in claim 1 wherein said long wavelength signals contain color information components of a color television signal and said short wavelength signals contain luminance information of said color television signal.
Claim 5
Independent Claim
119 words
A method of recording two separate signals of respectively long and short wavelength frequency content on a tape record having a magnetizable coating comprising the steps of: recording the long wavelength frequency signals substantially into the thickness of the magnetizable tape coating and in a first plurality of tracks on said tape, adjacent pairs of tracks of said first plurality of tracks being separated by a guard band; and then recording the short wavelength frequency signals substantially into the surface layer of said magnetizable tape coating, said recording being partially in the magnetizable coating of said guard band separating said first plurality of tracks and partially over said long wavelength signals recorded in said first plurality of tape tracks.
Claim 6
Independent Claim
119 words
A method of recording two separate signals of respectively long and short wavelength frequency content on a tape record having a magnetizable coating comprising the steps of: recording the long wavelength frequency signals substantially into the thickness of the magnetizable tape coating and in a first plurality of tracks on said tape, adjacent pairs of tracks of said first plurality of tracks being separated by a guard band; and then recording the short wavelength frequency signals substantially into the surface layer of said magnetizable tape coating, said recording being partially in the magnetizable coating of said guard band separating said first plurality of tracks and partially over said long wavelength signals recorded in said first plurality of tape tracks.
Claim 7
Dependent Claim
59 words
A method of recording as defined in claim 4 wherein said short wavelength signals are recorded in a second plurality of tracks on said tape, adjacent pairs of tracks of said second plurality of tracks being separated by a guard band, each guard band separating said second plurality of tracks being on one of said first plurality of tracks.
Claim 8
Dependent Claim
42 words
A method of recording as defined in claim 5 wherein available area of said magnetizable coating for said first and second plurality of tracks is filled with a recorded signal to provide complete utilization of the available area of the magnetizable coating.
Claim 9
Dependent Claim
28 words
A method for recording as defined in claim 6 wherein said first and said second plurality of tracks are parallel and transverse to the length of said tape.
Claim 10
Dependent Claim
36 words
A method of recording as defined in claim 7 wherein said long wavelength signals contain color information components of a color television signal aNd said short wavelength signals contain luminance information of said color television signal.
Claim 11
Dependent Claim
28 words
A method of recording as defined in claim 8 wherein said first and said second plurality of tracks are slanted with respect to the length of said tape.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |