Patent EP0473322A1 successfully refreshed from Google Patents.
EP0473322A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of and apparatus for film to video signal conversion
Assignee: Sony United Kingdom Ltd
•
Filing: 1991-08-12
•
Granted: —
•
Expires: 2011-08-12
Abstract
Abstract Apparatus for converting, for example, 24Hz 1:1 format film to, for example, a 60Hz 2:1 interlace format video signal comprises a converter (12) for transferring 24Hz 1:1 format film material to a 60Hz 2:1 interlace format video signal using 3 2 3 2 pull down, and a sequencer (13) associated with the converter (12) for associating a 10-field sequence identifier with the video signal. The 10-field sequence identifier is used to maintain identification of the phantom fields and the field sequence through subsequent processing, and in particular to control motion processing.
Inventors
- 👤 John William Richards
- 👤 Milan Krsljanin
- 👤 Yoshio Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 18:55
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/253; H04N3/00; H04N3/36; H04N5/76; H04N5/84; H04N5/87; H04N7/00; H04N7/01; H04N7/0112
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
31 words
A method of film to video signal transfer involving the creation of phantom video fields, wherein a field sequence identifier is associated with said video signal to identify said phantom fields.
Claim 2
Dependent Claim
21 words
A method according to claim 1 further comprising motion processing of said video signal in dependence on said field sequence identifier.
Claim 3
Independent Claim
33 words
A method of 24Hz 1:1 format film to 60Hz 2:1 interlace format video signal transfer using 3 2 3 2 pull down, wherein a 10-field sequence identifier is associated with said video signal.
Claim 4
Independent Claim
146 words
A method of 24Hz 1:1 format film to 60Hz 2:1 interlace video signal to 24Hz 1:1 format film transfer comprises the steps of: converting 24Hz 1:1 format film material to a 60Hz 2:1 interlace format video signal using 3 2 3 2 pull down; associating a 10-field sequence identifier with said video signal, said 10-field sequence identifier indicating the phantom fields added during said pull down; effecting motion processing of said video signal in dependence on said 10-field sequence identifier; modifying said 10-field sequence identifier in dependence on processing delays occurring during motion processing of said video signal, to maintain correct indication of said phantom fields added during said pull down; converting said video signal to 24Hz 1:1 format, including dropping said phantom fields added during said pull down and indicated by said modified 10-field sequence identifier; and recording said converted video signal on film (1).
Claim 5
Dependent Claim
27 words
A method according to claim 3 or claim 4 wherein said 10-field sequence identifier comprises modulo-5 or modulo-10 coding of a time code in said video signal.
Claim 6
Dependent Claim
30 words
A method according to claim 3 or claim 4 wherein said 10-field sequence identifier comprises marked lines or data incorporated in lines of the blanking intervals of said video signal.
Claim 7
Dependent Claim
19 words
A method according to claim 3 or claim 4 wherein said 10-field sequence identifier comprises time code user bits.
Claim 8
Dependent Claim
34 words
Apparatus for film to video signal transfer involving the creation of phantom video fields, the apparatus comprising means (13) to associate a field sequence identifier with said video signal to identify said phantom fields.
Claim 9
Dependent Claim
29 words
Apparatus according to claim 1 further comprising means (21, 22, 23) to motion process said video signal, the motion processing being effected in dependence on said field sequence identifier.
Claim 10
Dependent Claim
65 words
Apparatus for converting 24Hz 1:1 format film (1) to a 60Hz 2:1 interlace format video signal, the apparatus comprising: conversion means (12) for trans ferring 24Hz 1:1 format film material to a 60Hz 2:1 interlace format video signal using 3 2 3 2 pull down; and coding means (13) associated with said conversion means (12) for associating a 10-field sequence identifier with said video signal.
Claim 11
Dependent Claim
173 words
Apparatus for 24Hz 1:1 format film to 60Hz 2:1 interlace format video signal to 24Hz 1:1 format film conversion, the apparatus comprising: means (12) for transferring 24Hz 1:1 format film material to a 60Hz 2:1 interlace format video signal using 3 2 3 2 pull down; coding means (13) for associating a 10-field sequence identifier with said video signal, said 10-field sequence identifier indicating the phantom fields added during said pull down; a motion processor (21, 22, 23) for effecting motion processing of said video signal in dependence on said 10-field sequence identifier; means (25, 29) for modifying said 10-field sequence identifier in dependence on processing delays occurring during processing of said video signal, to maintain correct indication of said phantom fields added during said pull down; conversion means (43) for converting said processed video signal to 24Hz 1:1 format, said conversion means (43) dropping said phantom fields added during said pull down and indicated by said modified 10-field sequence identifier; and recording means (47) for recording said converted video signal on film.
Claim 12
Dependent Claim
26 words
Apparatus according to claim 10 or claim 11 wherein said 10-field sequence identifier comprises modulo-5 or modulo-10 coding of a time code in said video signal.
Claim 13
Dependent Claim
29 words
Apparatus according to claim 10 or claim 11 wherein said 10-field sequence identifier comprises marked lines or data incorporated in lines of the blanking intervals of said video signal.
Claim 14
Dependent Claim
18 words
Apparatus according to claim 10 or claim 11 wherein said 10-field sequence identifier comprises time code user bits.
References Cited (Backward Citations)
US4338634A
Cited
US4633293A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.