Method of creating video effects by use of keyframes

Details Method of creating video effects by use of keyframes Method of creating video effects by use of keyframes

1995-05-19

1997-06-10

Peng, John K.

Television

Image signal processing circuitry specific to television

Special effects

348578, 348584, 348598, 348600, H04N 974

Patent

active

056381336

ABSTRACT:
A video effect is created with a video processing machine having a plurality of functions, each of which has a state that is selectively variable in response to change in an associated function parameter. The method comprises selecting a set of functions, specifying a starting keyframe containing a starting value for each of the parameters, specifying an ending keyframe containing ending values for the parameters associated with the functions of the selected set and vacancies for the other parameters associated with other functions, and specifying a number of video frames. The starting keyframe is used to place the machine in a starting state, in which each function has the status defined by the value of its associated parameter in the starting keyframe, and a first video frame is processed with the processing machine in the starting state. The starting keyframe, the ending keyframe and the number of video frames are used to calculate a next frame value for each of the parameters associated with a function in the selected set. The next frame values are used to place the machine in a next frame state, in which each function of the set has the status defined by the next frame value of its associated parameter, while maintaining unaltered the values of the parameters associated with the other functions, and the next video frame is processed with the machine in the next frame state.

REFERENCES:
patent: 4472732 (1984-09-01), Bennett et al.
patent: 4791489 (1988-12-01), Polatnick
patent: 5331350 (1994-07-01), Fujita

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