US3752906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video-to-film conversion process
Assignee: DIGITAL LASER TRANSFORM Ltd
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Filing: 1971-12-20
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Granted: 1973-08-14
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Expires: 1991-12-20
Abstract
Abstract A color videotape-to-film conversion process uses a randomaccess storage medium to store a group of color image fields. Selected stored image fields are then repeatedly retrieved for the successive decoding and recording of the primary colors. For each color, the retrieved fields are combined in varying order for noise reduction, frame rate conversion, and luminance-chroma separation. The monochromatic combined fields are then recorded on film in pairs as monochromatic frames, with a full blank field between frames to provide adequate time for film advance and precision registration. Internally clocked timing means control the storage, selection, and retrieval of the video tape signals.
Inventors
- 👤 J Lowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:13
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/84; H04N5/843; H04N5/846; H04N5/765
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
A method for recording color video signals on motion picture film comprising the steps of: a. transferring a signal group consisting of predetermined number of full-color video image input fields from a color video signal source to a signal storage device in real time; b. repeatedly retrieving selected fields of said group at time intervals differing from their real time intervals; c. processing said retrieved input field signals to produce monochromatic output frames each consisting of at least two fields, each selected input field being retrieved at least once for each primary color; and d. recording each said single-color output frame on a separate increment of motion picture film.
Claim 2
Independent Claim
109 words
A method for recording color video signals on motion picture film comprising the steps of: a. transferring a signal group consisting of predetermined number of full-color video image input fields from a color video signal source to a signal storage device in real time; b. repeatedly retrieving selected fields of said group at time intervals differing from their real time intervals; c. processing said retrieved input field signals to produce monochromatic output frames each consisting of at least two fields, each selected input field being retrieved at least once for each primary color; and d. recording each said single-color output frame on a separate increment of motion picture film.
Claim 3
Independent Claim
79 words
A system for converting electronic image information from real to non-real time, comprising: a. a source of electronic image information; b. random-access storage means connected to receive said information from said source in real time; c. logic means connected to said storage means and arranged to read said information out of said storage means in non-real time; and d. means operatively connected to said storage means for utilizing said information read out of said storage means in non-real time.
Claim 4
Independent Claim
79 words
A system for converting electronic image information from real to non-real time, comprising: a. a source of electronic image information; b. random-access storage means connected to receive said information from said source in real time; c. logic means connected to said storage means and arranged to read said information out of said storage means in non-real time; and d. means operatively connected to said storage means for utilizing said information read out of said storage means in non-real time.
Claim 5
Dependent Claim
87 words
A video-to-film conversion system, comprising: a. a source of video image information; b. random-access storage means connected to receive said information from said source in real time; c. logic means connected to said storage means and arranged to read said information out of said storage means in non-real time; and d. means for recording electronic signals on film, said means being operatively connected to said storage means to receive said information in non-real time, and being arranged to record said information on said film in non-real time.
Claim 6
Dependent Claim
87 words
A video-to-film conversion system, comprising: a. a source of video image information; b. random-access storage means connected to receive said information from said source in real time; c. logic means connected to said storage means and arranged to read said information out of said storage means in non-real time; and d. means for recording electronic signals on film, said means being operatively connected to said storage means to receive said information in non-real time, and being arranged to record said information on said film in non-real time.
Claim 7
Dependent Claim
126 words
A color videotape-to-film conversion system, comprising: a. intermittently operable video tape means for intermittently playing back groups of full-color video tape fields, each containing a predetermined number of fields; b. random-access storage means arranged to store at least said predetermined number of fields; c. color selector means; d. monochromatic film recording means; and e. timing and selection logic means arranged to store groups of video tape fields in said storage means, to repetitively retrieve selected ones of said stored fields for processing through said color selector, and to operate said color selector and the film transport mechanism of said film recording means to record pairs of monochromatic fields, each pair being separated from the next by one full field interval during which the film is advanced.
Claim 8
Dependent Claim
126 words
A color videotape-to-film conversion system, comprising: a. intermittently operable video tape means for intermittently playing back groups of full-color video tape fields, each containing a predetermined number of fields; b. random-access storage means arranged to store at least said predetermined number of fields; c. color selector means; d. monochromatic film recording means; and e. timing and selection logic means arranged to store groups of video tape fields in said storage means, to repetitively retrieve selected ones of said stored fields for processing through said color selector, and to operate said color selector and the film transport mechanism of said film recording means to record pairs of monochromatic fields, each pair being separated from the next by one full field interval during which the film is advanced.
Claim 9
Dependent Claim
79 words
The system of claim 4, further comprising frame rate converting motion detector and combiner means having a prime field input and a plurality of informational field inputs, in which said timing and selection logIc means are further arranged to retrieve successive odd-field and even-field subgroups and apply the same to said inputs in such a sequence that selected ones of said video tape fields are presented only to said informational field inputs but never to said prime field input.
Claim 10
Dependent Claim
32 words
The system of claim 5, in which all of said video tape fields are used as informational fields but only predetermined ones of said vdieo tape fields are used as prime fields.
Claim 11
Independent Claim
160 words
A method of producing, from a color video tape, a monochromatic film having groups of successive frames each containing one of the three primary color components of a given color video tape image, comprising the steps of: a. storing a group of color video tape image fields on discrete portions of a random-access storage medium; b. repeatedly alternately retrieving the odd and even field of a selected pair of fields stored in said storage medium; c. separating the retrieved fields into their three primary color components; d. recording the first color components of said pair of fields successively on a first frame of said film; e. ceasing said recording for one field time following the recording of said first color components, and advancing said film by one frame during said one field time; and f. repeating said recording step and said recording cessation step for the second color components and for the third color components of said pair of fields.
Claim 12
Independent Claim
160 words
A method of producing, from a color video tape, a monochromatic film having groups of successive frames each containing one of the three primary color components of a given color video tape image, comprising the steps of: a. storing a group of color video tape image fields on discrete portions of a random-access storage medium; b. repeatedly alternately retrieving the odd and even field of a selected pair of fields stored in said storage medium; c. separating the retrieved fields into their three primary color components; d. recording the first color components of said pair of fields successively on a first frame of said film; e. ceasing said recording for one field time following the recording of said first color components, and advancing said film by one frame during said one field time; and f. repeating said recording step and said recording cessation step for the second color components and for the third color components of said pair of fields.
Claim 13
Dependent Claim
53 words
The method of claim 7, further comprising the step of retrieving adjacent stored fields of the same parity simultaneously with the retrieval of each said selected field, and combining portions of said selected field and said adjacent like-parity fields to form a composite field of which said selected field is the prime field.
Claim 14
Dependent Claim
23 words
The method of claim 8, in which predetermined ones of said stored fields are omitted in the selection of pairs of prime fields.
Claim 15
Dependent Claim
49 words
The method of claim 8, in which the retrieval of said fields is continuous but not in real time, and the storage operation is conducted intermittently but in real time concurrently with said retrieval on portions of said random-access medium not being used for retrieval during the storage operation.
References Cited (Backward Citations)
US3600504A
Cited
US3685899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |