DIGITAL VIDEO EFFECTS GENERATOR

A digital video effects generator includes: circuit for up-sampling the digital video component signals prior to their spatial transformation and linear interpolation, thereby reducing losses due to the (sin x)/x frequency response of the sampled video signal; circuit for spatially-mapping video motion data representing the degree of video data motion between temporally adjacent video frames and for motion adaptive interpolation to selectively blend interpolated video field data in accordance therewith; circuit for pre-transform keying, thereby allowing two video signal transformations to be keyed simultaneously; circuit for selectively transforming portions of input video signals, thereby allowing selective keying of non-spatially transformed video into selected regions of the video image; circuit for selectively linking keyframes within separate effects and providing smooth parametric transitions therebetween, thereby allowing several separate effects to be combined into a single effect with smooth parametric transitions between the linked (inter-effect) keyframes; and circuit for maintaining "pinned" image corners during parametric transitions between keyframes.