GB1232133A - - Google Patents
Info
- Publication number
- GB1232133A GB1232133A GB1232133DA GB1232133A GB 1232133 A GB1232133 A GB 1232133A GB 1232133D A GB1232133D A GB 1232133DA GB 1232133 A GB1232133 A GB 1232133A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- signal
- line
- detector
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/36—Scanning of motion picture films, e.g. for telecine
- H04N3/40—Scanning of motion picture films, e.g. for telecine with intermittently moving film
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
1,232,133. Television. BRITISH BROADCASTING CORP. 16 Jan., 1970 [20 Feb., 1969], No. 9329/69. Heading H4F. Two adjacent frames of a motion picture film 16 which is intermittently pulled down one frame by a mechanism 18 are scanned simultaneously by a flying spot scanner comprising a cathode-ray tube 12, twin lenses 14, 14 and 20, 20, and photodetectors 22, 24 and a switch 34 connected to an output 32 is synchronized with the mechanism 18 to pass the direct signal from detector 22 when the film is stationary and the signal from detector 24, delayed 30 for a substantially integral number of fields, when the film is moving. In a preferred embodiment, the line 30 provides a delay of one field Œ one half line period, and the spacing of the two flying spot images at the film is one film frame pitch Œ one picture line pitch. In a modification, the switch may be arranged to pass both the signals at 26, 28 to a combining circuit, except when either signal is unusable due to pull down, when only the other signal is passed. The separation of the lenses 14 may be servo-controlled, e.g. by arranging that, during field blanking periods, the line scan of the tube 12 is perturbed to scan the film sprocket holes, when the outputs 26, 28 should be time coincident.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB932969 | 1969-02-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1232133A true GB1232133A (en) | 1971-05-19 |
Family
ID=9869869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1232133D Expired GB1232133A (en) | 1969-02-20 | 1969-02-20 |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1232133A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3814850A (en) * | 1971-10-27 | 1974-06-04 | Rank Organisation Ltd | Flying spot film scanner providing increased time for film pull-down |
EP0556044A2 (en) * | 1992-02-12 | 1993-08-18 | Sony Corporation | Telecine apparatus |
GB2281166A (en) * | 1993-08-16 | 1995-02-22 | Rank Cintel Ltd | Double scan telecine device |
WO1996025007A1 (en) * | 1995-02-07 | 1996-08-15 | Adaptive Optics Associates, Incorporated | An improved telecine |
-
1969
- 1969-02-20 GB GB1232133D patent/GB1232133A/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3814850A (en) * | 1971-10-27 | 1974-06-04 | Rank Organisation Ltd | Flying spot film scanner providing increased time for film pull-down |
EP0556044A2 (en) * | 1992-02-12 | 1993-08-18 | Sony Corporation | Telecine apparatus |
EP0556044A3 (en) * | 1992-02-12 | 1993-12-01 | Sony Corp | Telecine apparatus |
US5493330A (en) * | 1992-02-12 | 1996-02-20 | Sony Corporation | Telecine apparatus utilizing an equal-interval pull-down technique |
GB2281166A (en) * | 1993-08-16 | 1995-02-22 | Rank Cintel Ltd | Double scan telecine device |
US5557322A (en) * | 1993-08-16 | 1996-09-17 | Rank Cintel Limited | Telecines with simultaneous scanning of a plurality of frames |
GB2281166B (en) * | 1993-08-16 | 1997-08-06 | Rank Cintel Ltd | Telecines |
WO1996025007A1 (en) * | 1995-02-07 | 1996-08-15 | Adaptive Optics Associates, Incorporated | An improved telecine |
US5808669A (en) * | 1995-02-07 | 1998-09-15 | Adaptive Optics Associates, Inc. | Telecine with dual digitizers and multiple scanning beams |
US6011582A (en) * | 1995-02-07 | 2000-01-04 | Adaptive Optics Associates, Inc. | Telecine with dual digitizers and multiple scanning beams |
US6084629A (en) * | 1995-02-07 | 2000-07-04 | Adaptive Optics Associates, Inc. | Telecine with dual digitizers and multiple scanning beams |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |