US4462049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a video signal recorded on a record carrier
Assignee: Robert Bosch GmbH
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Filing: 1981-11-20
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Granted: 1984-07-24
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Expires: 2001-11-20
Abstract
Abstract To reproduce a video signal recorded in a plurality of individual inclined tracks on a magnetic tape by a head-wheel, the information content of each television picture is distributed over a plurality of the tracks and the reproduction is effected at a different tape speed from that of recording. Each head at the periphery of the head-wheel is deflectable in a direction perpendicular to the plane in which the head-wheel rotates, and at all times at least two heads are simultaneously in contact with the tape. The deflection of each head is controlled in such manner that at any given time at least one of the two heads in contact with the tape is guided along a recorded track, and reproduced picture information is continuously available in correct sequence by selective switching of the outputs from the magnetic heads.
Inventors
- 👤 Jurgen Heitmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:44
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; G; G11; G11B; G11B15/00; G11B15/02; G11B15/12; G11B15/14; G11B5/00; G11B5/48; G11B5/58; G11B5/584; G11B5/588
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
A process for reproducing a video signal recorded in a plurality of individual tracks on a magnetic tape by a rotating head-wheel having a plurality of circumferential magnetic recording/reproducing heads, wherein the magnetic tape helically loops the head-wheel, and the individual tracks are inclined to the longitudinal direction of the tape, said process, in accordance with the invention, reproducing the information content of each television field distributed over a plurality of the tracks, and the reproduction being effected at a speed different from that of recording, comprising the combination of steps of deflecting each head at the circumference of the head-wheel in a direction perpendicular to the plane; maintaining at all times at least two heads on the head-wheel simultaneously in contact with the tape; controlling the deflection of each head on the head-wheel in such manner that at any given time at least one of the said two heads in contact with the tape is guided along a recorded track; and selectively switching the outputs from said heads in such manner that reproduced picture information is continuously available in correct sequence from the outputs of the magnetic heads.
Claim 2
Dependent Claim
189 words
A process for reproducing a video signal recorded in a plurality of individual tracks on a magnetic tape by a rotating head-wheel having a plurality of circumferential magnetic recording/reproducing heads, wherein the magnetic tape helically loops the head-wheel, and the individual tracks are inclined to the longitudinal direction of the tape, said process, in accordance with the invention, reproducing the information content of each television field distributed over a plurality of the tracks, and the reproduction being effected at a speed different from that of recording, comprising the combination of steps of deflecting each head at the circumference of the head-wheel in a direction perpendicular to the plane; maintaining at all times at least two heads on the head-wheel simultaneously in contact with the tape; controlling the deflection of each head on the head-wheel in such manner that at any given time at least one of the said two heads in contact with the tape is guided along a recorded track; and selectively switching the outputs from said heads in such manner that reproduced picture information is continuously available in correct sequence from the outputs of the magnetic heads.
Claim 3
Dependent Claim
51 words
A process according to claim 1, wherein the steps of controlling the deflection of the heads and the switching of the heads for providing the said information in correct sequence is effected in such manner as to reduce to a minimum the maximum deflection of any head from its undeflected position.
Claim 4
Dependent Claim
37 words
A process according to claim 1 or 2, wherein the heads are symmetrically arranged around the periphery of the head-wheel with a separation substantially equal to one half the angle by which the tape loops the head-wheel.
Claim 5
Dependent Claim
41 words
A process according to claim 3, wherein two pairs of oppositely disposed heads are arranged at the periphery of the head-wheel and each of the heads is fed with a control signal which produces the required deflection at any given time.
Claim 6
Dependent Claim
19 words
A process according to claim 4, wherein the heads of each pair are fed with an identical control signal.
Claim 7
Dependent Claim
51 words
A process according to claim 1, wherein the video signal is recorded in digital form in two channels by at least one respective head allocated to each channel, and wherein successive heads used in the provision of the reproduced picture information were alternatively allocated to the two different channels when recording.
References Cited (Backward Citations)
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Cited
US4139867A
Cited
US4210938A
Cited
US4233637A
Cited
US4293879A
Cited
US4328518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |