US4127869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television apparatus
Assignee: Cintel International Ltd
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Filing: 1977-10-28
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Granted: 1978-11-28
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Expires: 1997-10-28
Abstract
Abstract In a flying spot telecine apparatus, the horizontal scanning frequency is increased above the standard frequency to permit sequential scanning. The resultant signal is then processed electronically to provide signals suitable for a normal interlaced picture display.
Inventors
- 👤 John D. Millward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:11
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/36; H04N3/38; H04N9/00; H04N9/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
199 words
In a flying spot telecine apparatus adapted for operation according to the 625/50 television standard and comprising means for driving a cinema film past a scanning position at a rate of 25 film frames per second, means for optically scanning consecutive frames of the cinema film in raster fashion with a light beam of small cross-section, optoelectronic detector means for converting the picture information thereby modulated on the light beam into electrical video signal form, and video processing circuit means for deriving from the electrical video information a television signal comprising consecutive groups of two interlaced television fields containing picture information derived from scanning respective consecutive film frames, the improvement wherein the film driving means is adapted to drive the film with continuous motion, wherein the scanning means is adapted to scan each film frame in sequential mode at a line frequency greater than the standard line frequency and with a vertical scan deflection magnitude greater than would be necessary if the frame were scanned sequentially at the standard line frequency, and wherein the video processing circuit means includes means for converting the electrical video information derived by the scanning into interlaced form and to the standard line frequency.
Claim 2
Dependent Claim
199 words
In a flying spot telecine apparatus adapted for operation according to the 625/50 television standard and comprising means for driving a cinema film past a scanning position at a rate of 25 film frames per second, means for optically scanning consecutive frames of the cinema film in raster fashion with a light beam of small cross-section, optoelectronic detector means for converting the picture information thereby modulated on the light beam into electrical video signal form, and video processing circuit means for deriving from the electrical video information a television signal comprising consecutive groups of two interlaced television fields containing picture information derived from scanning respective consecutive film frames, the improvement wherein the film driving means is adapted to drive the film with continuous motion, wherein the scanning means is adapted to scan each film frame in sequential mode at a line frequency greater than the standard line frequency and with a vertical scan deflection magnitude greater than would be necessary if the frame were scanned sequentially at the standard line frequency, and wherein the video processing circuit means includes means for converting the electrical video information derived by the scanning into interlaced form and to the standard line frequency.
Claim 3
Dependent Claim
71 words
A flying spot telecine apparatus according to claim 1, wherein the opto-electronic detector means is adapted to convert the information modulated on the light beam to a plurality of colour value signals, and wherein the video processing circuit means is adapted to first individually convert the colour value signals into interlaced form and to the standard line frequency and to then colour encode the individually converted signals into a single signal.
Claim 4
Dependent Claim
70 words
A flying spot telecine apparatus according to claim 1, wherein the opto-electronic detector means is adapted to convert the information modulated on the light beam to a plurality of colour value signals, and wherein the video processing circuit means is adapted to first colour encode the colour value signals into a single signal and to then convert the single encoded signal to interlaced form and to the standard line frequency.
References Cited (Backward Citations)
US2517797A
Cited
US2590281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |