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Video-post-production-of-material-acquired-on-film

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Video post-production of material acquired on film

Details

Inventors: Richards, John W.; Krsljanin, Milan; Ozaki, Yoshio;
Assignee: Sony Broadcast & Communications Limited (Basingstoke, GB2)
Primary Examiner: Razavi; Michael T.
Assistant Examiner: Greening; Wendy R.
Attorney, Agent or Firm: Sinderbrand; Alvin, Frommer; William S.

Apparatus for converting, for example, 24 Hz 1:1 format film to, for example, a 60 Hz 2:1 interlace format video signal comprises a converter (12) for transferring 24 Hz 1:1 format film material to a 60 Hz 2:1 interlace format video signal using 3 2 3 2 pull down, and a coder (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.

DETAILED DESCRIPTION One object of the present invention is to provide an improved method of film to video signal transfer.
Another object of the present invention is to provide a method of film to video signal transfer which permits correct motion rendition.
Another object of the present invention is to provide a method of film to video signal transfer with intermediate motion processing of the video signal, while retaining correct motion rendition.
Another object of the present invention is to provide apparatus for film to video signal transfer which overcomes the above-mentioned problems.
According to the present invention there is provided 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.
According to the present invention there is also provided a method of 24 Hz 1:1 format film to 60 Hz 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.
According to the present invention there is also provided a method of 24 Hz 1:1 format film to 60 Hz 2:1 interlace video signal to 24 Hz 1:1 format film transfer comprises the steps of: converting 24 Hz 1:1 format film material to a 60 Hz 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 24 Hz 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

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