The Grass Valley Group, Inc.

Frank S Lawrence

Raymond C Blackham

Ronnie D Barnett

A method of producing a composited video image based on depth uses a serial combiner to which a plurality of video input signals, representing video images, and priority signals are input. The video input signals each have an associated depth signal. The depth signals are sorted from farthest to nearest and a matrix control signal is generated from the depth signals. The matrix control signal is used to route the video input signals to appropriate inputs of the serial combiner in order from farthest to nearest. The priority signals are derived from the depth signals either serially or in parallel.

Method of producing a composited video image based on depth

A video mapping system includes a weighting coefficients generator and a two-dimensional resampling filter that efficiently utilize memory resources and operate fast enough to process a video image stream without introducing artifacts through temporal interpolation. This system can accommodate non-linear and many-to-one mappings, allowing a source two-dimensional video image to be folded over itself in complicated ways to produce an image in the target coordinate system. The only restrictions are that the mapping be piecewise continuous and single-valued. Anti-aliasing filtering is implicit in the approach.

Video image mapping system

An improved digital mixer provides means for correcting a conventional mixer output that uses the full range of a mixer control variable to satisfy desired mixer constraints. The correction is accomplished by combining the mix output with a correction signal to satisfy the equation

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Grass Valey, CA, United States of America

Frank S Lawrence