Format conversion of digital video signals, integration of digital video signals into photographic film material and the like, associated signal processing, and motion compensated interpolation of images
AssigneeSony United Kingdom Limited
InventorsMartin R. Dorricott, Clive H. Gillard, John W. Richards, Tsuneo Morita, James J. Galt, Morgan W. A. David, James E. Burns, Shima R. Varsani
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Abstract
A system for integrating film material with a digital video signal employs a film scanner to produce a digital video signal from the source film, and a post production system for combining with that signal the input digital video signal. Motion interpolated temporal compensation is employed at stages of frame rate conversion.
Claims6
A method of converting an input 24 frame/s progressive scan format digital video signal into an output 60 field/s 2:1 interlace scan format digital video signal, comprising the step of forming fields of the output signal from frames of the input signal such that at least four of every five output fields are produced by motion compensated interpolation between successive pairs of the input frames, and wherein a series of five successive output fields are produced from a series of three successive input frames such that:
- a) the first output field is produced from the first input frame without motion compensated interpolation;
- b) the second output field is produced by motion compensated interpolation two-fifths of the way between the first and second input frames;
- c) the third output field is produced by motion compensated interpolation four-fifths of the way between the first and second input frames;
- d) the fourth output field is produced by motion compensated interpolation one-fifth of the way between the second and third input frames;
- and
- e) the fifth output field is produced by motion compensated interpolation three-fifths of the way between the second and third input frames.
A method of converting an input 24 frame/s progressive scan format digital video signal into an output 30 frame/s progressive scan format digital video signal, comprising the step of forming frames of the output signal from frames of the input signal such that at least four of every five output frames are produced by motion compensated interpolation between successive pairs of the input frames, wherein a series of five successive output frames are produced from a series of five successive input frames such that:
- a) the first output frame is produced from the first input frame without motion compensated interpolation;
- b) the second output frame is produced by motion compensated interpolation four-fifths of the way between the first and second input frames;
- c) the third output frame is produced by motion compensated interpolation three-fifths of the way between the second and third input frames;
- d) the fourth output frame is produced by motion compensated interpolation two-fifths of the way between the third and fourth input frames;
- and
- e) the fifth output frame is produced by motion compensated interpolation one-fifth of the way between the fourth and fifth input frames.
Dependencies are inferred from the claim text.