The Grass Valley Group, Inc.

Other

Tektronix, Inc.

Grass Valley (u.s.) Inc.

Neil R Olmstead

Richard A Frasier

James E Blecksmith

Richard A Jackson

Kevin D Windrem

John Abt

Richard S Bannister

Ronnie D Barnett

Thomas A Grancey

Peter D Symes

Charles Q Hoard

F Andrew Witek

William C Lange

James A Delwiche

Scott Murray

David Casper

Brion L Dunbar

Thomas H Knight

Bret Jones

A method of transmission of wide bandwidth chroma signals converts a component video signal having a luminance and two half-bandwidth chroma components into a 0:4:4 video signal having no luminance component and two wide bandwidth chroma components. Half of the wide bandwidth chroma component samples are inserted into a standard serial digital data stream in place of the luminance component, and the second half of the wide bandwidth chroma component samples are inserted into the standard serial digital data stream in place of the two half-bandwidth chroma components.

Transmission of wideband chroma signals

A dynamically paged non-volatile random access video store has a random access memory integrated with a disk drive. The random access memory provides realtime access for recording and playing back video from and to a video source. The disk drive provides a non-volatile backup for the random access memory by transferring data between the disk drive and random access memory automatically, or by command, on a non-realtime basis. The video data accesses and transfers are handled by a microprocessor that interfaces with a controller by which an operator inputs instructions. Multiple channels are accommodated via a channel interface, also controlled by the microprocessor, between external video devices and the random access memory. The disk drive stores a plurality of pages of video data, each page corresponding to the capacity of the random access memory.

Dynamically paged non-volatile random access video store

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.

Reduced viewport for graphics display

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.

Graphics path prediction display

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. The operator interfaces are also connected to the first output device for selecting the output terminals of the first subset of video processors and to the second output device for selecting the output terminals of the second subset of video processors.

Video switcher system with modular architecture

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.

Video switcher with independent processing of selected video signals

Growing community of inventors

Nevada City, CA, United States of America

Neil R Olmstead