Abstract: A method and apparatus for video editing and realtime processing which generates clips. Each clip includes data identifying a scene of a video or audio program, and data identifying processing operations to be applied to the scene. In preferred embodiments, control signals generated from the clips are supplied to a storage subsystem and a processing subsystem. In response, the storage and processing subsystems assemble and process, in realtime, an edited video or audio program from raw scene data stored in the storage subsystem. Typically, each clip contains content data determining the content of a scene (e.g., "begin" and "end" frames of a stored segment of video data) and also processing data (for use by the processing subsystem) identifying processing operations to be performed on a particular scene (or portion thereof) when assembling an edited program from stored scenes.

Abstract: A reduced viewport feature for a graphics display system allows an operator to observe manipulations on a graphics display of video image planes that are wholly or partially outside a viewing area. A two-dimensional input image plane in the form of a wireframe is transformed to a three-dimensional image plane due to manipulation, such as rotation and/or translation. The resulting three-dimensional image plane is subsequently mapped as a two-dimensional projection onto the graphics display. Transformation matrix coefficients are multiplied by a variable reduction coefficient to cause all points of the image plane to converge toward the center of the graphics display, resulting in the ability to view space which originally was not visible to the operator on an output video monitor.

Abstract: A graphics path display has fixed wireframes representing key positions of an image being manipulated. Inbetween wireframes, dots or dashes are generated according to a defined display rate between sequential key positions. The inbetween wireframes are generated by an algorithm selected by an operator, and are adjusted in realtime as the operator changes variable parameters for the algorithm to present a realtime display of the graphics path defined by the algorithm and parameters.

Abstract: Video signal processing apparatus comprises at least first and second source selectors each having a plurality of input terminals, for receiving a plurality of video signals respectively, and at least two output terminals. A set of video processors each have an input terminal and an output terminal. A processor selector is provided for connecting each source selector output terminal selectively to each video processor input terminal. First and second output devices each have a plurality of input terminals connected to the output terminals of the video processors respectively and also have an output terminal. Operator interfaces are connected to the processor selector for defining a first subset of video processors having their input terminals connected to the output terminals of the first source selector and a second subset of video processors having their input terminals connected to the output terminals of the second source selector.

Abstract: A video switcher comprises a source selector having a plurality of input terminals for connection to a plurality of video sources respectively, and at least two output terminals. At least two processing channels each have an input terminal connected to an output terminal of the source selector and also have an output terminal. A video combiner has video input terminals connected to the output terminals of the processing channels and is operative to combine the output signals provided by the processing channels in dependence upon priority signals.