Method and apparatus for video camera image film simulation
DCFirst Claim
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1. A video camera for generating a video signal to simulate the appearance of film-recorded images comprising:
- means for receiving an optical image;
means for sampling the receiving means to generate a sampled video image of 24 progressively-scanned single field frames per second;
means for modifying the sampled video image to simulate the nonlinear gray scale of film; and
means for converting the modified video image into a video image of an interlaced format.
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Abstract
Video images are received by the present invention and processed to directly provide a video output having the appearance of a motion-picture-film-recorded image. The output of the invention may be provided directly for a television broadcast or recording on video tape. Simulation of film frames is provided by progressively scanning an imager at a rate similar to the frame rate of a motion picture film camera. Addition of filtered noise to provide the appearance of grain in photographic film and alteration of the apparent contrast provide variable artistic attributes which are adjustable for the desired film appearance.
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Citations
23 Claims
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1. A video camera for generating a video signal to simulate the appearance of film-recorded images comprising:
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means for receiving an optical image; means for sampling the receiving means to generate a sampled video image of 24 progressively-scanned single field frames per second; means for modifying the sampled video image to simulate the nonlinear gray scale of film; and means for converting the modified video image into a video image of an interlaced format. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A video camera for generating a video signal to simulate the appearance of film-recorded images comprising:
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an imaging device; means for sampling the imaging device to generate an analog-sampled video image in a 24 progressively-scanned frames-per-second format, each frame comprising 625 lines; an analog-to-digital convertor for converting the analog-sampled video image into a digital-sampled video image; means for adding filtered noise for grain simulation to the digital sampled video image; means for modifying the digital sampled video image to simulate the nonlinear gray scale of film; and means for selectively converting the modified video image into a video image of one of a plurality of second interlaced formats, the plurality of second formats including analog 525 lines/60 fields, digital 525 lines/60 fields, analog 625 lines/48 fields, and digital 625 lines/48 fields formats.
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15. A method for generating a video signal to simulate the appearance of film-recorded images comprising the steps of:
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receiving an optical image; sampling the optical image; generating a sampled video image of 24 progressively-scanned single field frames per second from the sampled optical image; modifying the sampled video image to simulate the nonlinear gray scale of film; and converting the modified video image into a video image of an interlaced format. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A videosystem for generating a video signal to simulate the appearance of film recorded images comprising:
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means for receiving an optical image; means for sampling the receiving means to generate a sampled video image of 24 progressively-scanned single field frames per second; means for modifying the sampled video image to simulate the nonlinear gray scale of film; means for converting the modified video image to a video image of an interlaced format; and means for recording the video image, said recording means having adjustable record and play-back speeds.
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Specification