Apparatus for converting input video signal to motion picture film image
First Claim
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1. An apparatus for converting an input video signal having a nominal transmission speed into a motion picture film image, the apparatus comprising:
- means for receiving said input video signal at said nominal transmission speed, converting said transmission speed of said video signal to a low speed that is lower than said nominal transmission speed, and transmitting said video signal at said low speed;
color detecting means receiving said video signal transmitted at said low speed for detecting a color characteristic of said transmitted video signal and producing a detection signal on the basis of said detected color characteristic;
color correcting means responsive to said video signal transmitted at said low speed and said detection signal for predicting a gamma correction to be performed, and for performing a color correction on said transmitted video signal in accordance with said detection signal and the predicted gamma correction so as to output a color corrected video signal;
gamma correcting means for performing gamma correction on said color corrected video signal on the basis of a gamma correction curve to form a gamma corrected signal; and
recording means for recording the gamma corrected signal formed by the gamma correcting means on motion picture film.
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Abstract
A picture signal converting apparatus converts a picture signal obtained from a video camera into a film recording signal. A color characteristic to be corrected and a corresponding correcting value are predetermined for each picture element of the picture signal. The picture signal is selectively color corrected with respect to the color represented by each picture element of the input picture signal. Color deterioration is effectively corrected so that the video signal is formed to match the color tone of the film.
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Citations
8 Claims
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1. An apparatus for converting an input video signal having a nominal transmission speed into a motion picture film image, the apparatus comprising:
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means for receiving said input video signal at said nominal transmission speed, converting said transmission speed of said video signal to a low speed that is lower than said nominal transmission speed, and transmitting said video signal at said low speed; color detecting means receiving said video signal transmitted at said low speed for detecting a color characteristic of said transmitted video signal and producing a detection signal on the basis of said detected color characteristic; color correcting means responsive to said video signal transmitted at said low speed and said detection signal for predicting a gamma correction to be performed, and for performing a color correction on said transmitted video signal in accordance with said detection signal and the predicted gamma correction so as to output a color corrected video signal; gamma correcting means for performing gamma correction on said color corrected video signal on the basis of a gamma correction curve to form a gamma corrected signal; and recording means for recording the gamma corrected signal formed by the gamma correcting means on motion picture film. - View Dependent Claims (2, 3)
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4. An apparatus for converting into a motion picture film image an input video signal having a nominal transmission speed and which is provided from a video camera having performed gamma correction on said input video signal by means of a non-linear amplifier, the apparatus comprising:
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means for receiving said input video signal at said nominal transmission speed, converting said transmission speed of said video signal to a low speed that is lower than said nominal transmission speed, and transmitting said video signal at said low speed; linearizing means receiving said video signal transmitted at said low speed for linearizing said transmitted video signal so as to reverse said gamma correction performed by said video camera; gamma correcting means for correcting said linearized video signal on the basis of a gamma correction curve to form a gamma corrected signal; and recording means for recording the gamma corrected signal formed by the gamma correcting means on motion picture film. - View Dependent Claims (5, 6)
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7. An apparatus for converting an input video signal having a nominal transmission speed into a motion picture film image, the apparatus comprising:
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means for receiving said input video signal at said nominal transmission speed, converting said nominal transmission speed of said video signal to a low speed that is lower than said nominal transmission speed, and transmitting said video signal at said low speed, said nominal transmission speed being a predetermined number of times as fast as said low speed; processing means receiving said video signal transmitted at said low speed for processing said transmitted video signal to form an output video signal; recording means for recording the output video signal formed by the processing means on motion picture film; memory means for storing successive frames of said output video signal at said low speed, said memory means having first and second memory areas, and alternate ones of said successive frames being respectively stored in said first and second memory areas; read-out control means for controlling reading-out of said stored frames of said output video signal from said memory means so that said stored frames are read-out in a cycle in which each respective frame stored in said first and second memory areas is read-out N consecutive times at said nominal transmission speed, N being equal to said predetermined number; and a monitor for displaying said frames of said output video signal read-out from said memory means. - View Dependent Claims (8)
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Specification