Patent US2996708A successfully refreshed from Google Patents.
Patent US3792230A successfully refreshed from Google Patents.
Patent US4064538A successfully refreshed from Google Patents.
US4064538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for displaying a picture film via a video-disc
Assignee: Thomson-Brandt SA
•
Filing: 1976-03-24
•
Granted: 1977-12-20
•
Expires: 1996-03-24
Abstract
Abstract A method and apparatus for displaying a picture film via a video-disc which consists in analyzing the pictures of the film on a plurality of interlaced fields which are successively recorded onto a video-disc. These fields are then read simultaneously on this video-disc and the video signal thus obtained are used for modulating a display apparatus scanned according to a primary raster with a superimposed raster. A coding device is used for mixing the video signals and producing signals for synchronizing the display apparatus.
Inventors
- 👤 Georges Broussaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:17
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/30; H04N5/00; H04N5/76; H04N5/91; H04N5/92
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
213 words
A method for displaying a picture film, said film comprising a succession of images, said method comprising the step of: analysing each of said images on a frame comprising at least one principal field of K × L lines (L and K being positive integers) said principal field being divided into K interlaced secondary fields, said secondary fields being analysed successively for providing a first plurality of K successive video signals, and said video signals having a bandwidth extending to a fixed upper frequency; recording successively said K successive video signals onto a video-disc bearing a spiral track comprising whorls; each of said successive video signals corresponding to a complete whorl; reading out simultaneously K successive whorls for providing a second plurality of K video signals; sampling successively the video signals of said second plurality at a rate substantially equal to said upper frequency, for providing a succession of samples; collecting said samples for providing a modulation signal; and modulating display means actuated by said modulation signal; said display means being scanned along a composite raster consisting of a primary raster of L lines and a secondary raster formed with a sawtooth superimposed upon said primary raster; said composite raster distributing said samples for reconstructing the initial field of K × L lines.
Claim 2
Independent Claim
213 words
A method for displaying a picture film, said film comprising a succession of images, said method comprising the step of: analysing each of said images on a frame comprising at least one principal field of K × L lines (L and K being positive integers) said principal field being divided into K interlaced secondary fields, said secondary fields being analysed successively for providing a first plurality of K successive video signals, and said video signals having a bandwidth extending to a fixed upper frequency; recording successively said K successive video signals onto a video-disc bearing a spiral track comprising whorls; each of said successive video signals corresponding to a complete whorl; reading out simultaneously K successive whorls for providing a second plurality of K video signals; sampling successively the video signals of said second plurality at a rate substantially equal to said upper frequency, for providing a succession of samples; collecting said samples for providing a modulation signal; and modulating display means actuated by said modulation signal; said display means being scanned along a composite raster consisting of a primary raster of L lines and a secondary raster formed with a sawtooth superimposed upon said primary raster; said composite raster distributing said samples for reconstructing the initial field of K × L lines.
Claim 3
Dependent Claim
16 words
A method as claimed in claim 1, wherein said frame comprises two successive interlaced principal fields.
Claim 4
Dependent Claim
248 words
A coding device for coding K, (K being a positive integer) single video signals representing simultaneously K secondary fields, into a complex video signal representing a principal field composed by interlacing said K secondary fields, and providing secondary field synchronization signals, secondary scan direction signals, said coding device comprising: means for extracting from one of said K single video signals said secondary field synchronisation signals; means for extracting from said one K single video principal field synchronisation signals; first counting means for counting said secondary field synchronisation signals, providing positionning signals; said counting means being reset to zero by said principal field synchronisation signal; a generator for providing internal clock signals; second counting means for counting said internal clock signals, providing sampling signals; enabling means for validating said positioning signal under the control of said secondary field synchronisation signals, and positionning said second counting means in the same state as first counting means; sampling means for sampling said K single video signals under the control of said sampling signals, providing a succession of samples; adding means for collecting said samples, providing said complex video signal; third counting means for counting said internal clock signals, providing said secondary scan synchronisation signals; said third counting means being reset to zero by said secondary field synchronisation signals; and bistable means for providing said secondary scan direction signals under the control of said principal field synchronisation signals; said bistable means being reset to a fixed position by said secondary field synchronisation signals.
Claim 5
Dependent Claim
248 words
A coding device for coding K, (K being a positive integer) single video signals representing simultaneously K secondary fields, into a complex video signal representing a principal field composed by interlacing said K secondary fields, and providing secondary field synchronization signals, secondary scan direction signals, said coding device comprising: means for extracting from one of said K single video signals said secondary field synchronisation signals; means for extracting from said one K single video principal field synchronisation signals; first counting means for counting said secondary field synchronisation signals, providing positionning signals; said counting means being reset to zero by said principal field synchronisation signal; a generator for providing internal clock signals; second counting means for counting said internal clock signals, providing sampling signals; enabling means for validating said positioning signal under the control of said secondary field synchronisation signals, and positionning said second counting means in the same state as first counting means; sampling means for sampling said K single video signals under the control of said sampling signals, providing a succession of samples; adding means for collecting said samples, providing said complex video signal; third counting means for counting said internal clock signals, providing said secondary scan synchronisation signals; said third counting means being reset to zero by said secondary field synchronisation signals; and bistable means for providing said secondary scan direction signals under the control of said principal field synchronisation signals; said bistable means being reset to a fixed position by said secondary field synchronisation signals.
References Cited (Backward Citations)
US2907819A
Cited
US3309461A
Cited
US3499980A
Cited
US3526900A
Cited
US3564127A
Cited
US3683111A
Cited
US3697678A
Cited
US3723644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |