1
Bruce L Rayner: Video editing system operator inter-face for visualization and interactive control of video material. The Grass Valley Group, John Smith Hill, Francis I Gray, February 7, 1995: US05388197 (257 worldwide citation)

An operator interface for a video editing system provides a visual sense of the content of video sequences, as well as their length, while also providing enhanced interactive control of locations and time alignments of the video. As the video sequence is processed into the system, a small but repres ...


2
Bruce L Rayner: Video editing operator interface for aligning timelines. The Grass Valley Group, Francis I Gray, May 21, 1996: US05519828 (153 worldwide citation)

An operator interface for a video editing system provides a visual sense of the content of video sequences, as well as their length, while also providing enhanced interactive control of locations and time alignments of the video. As the video sequence is processed into the system, a small but repres ...


3
Ronnie D Barnett, Steven M Parkes: Video Difference key generator. The Grass Valley Group, Francis I Gray, January 24, 1989: US04800432 (75 worldwide citation)

A video difference key generator has a stored reference video image. An input video image is compared with the reference video image by an absolute difference circuit which substracts corresponding pixels of the two video images, the smaller from the larger, to produce a difference video image. The ...


4
Bruce L Rayner, Peter N Johnson: Touch pad machine control. The Grass Valley Group, Francis I Gray, John Smith Hill, January 29, 1991: US04988982 (72 worldwide citation)

A touch pad machine control system uses a touch pad having an overlay to define control strip surface areas which perform different functions. The contact of an operator's finger along one of the defined control strips selects a desired function and produces the desired machine motion from the rate, ...


5
Francis A Witek, David E Lake Jr: Image orientation and animation using quaternions. The Grass Valley Group, Francis I Gray, January 10, 1989: US04797836 (69 worldwide citation)

A method for orientating and animating video images using quaternions to provide smooth, predictable rotations in a digital video effect device. Euler angles for a new orientation are input by an operator and are converted into an appropriate quaternion. For incremental orientation changes the appro ...


6
James R Grueter, Alethea F Mackinnon: Touchpad jogger. The Grass Valley Group, Francis I Gray, August 21, 1990: US04951036 (69 worldwide citation)

A touchpad jogger for emulating operator contact with a touchpad surface has a ball rotatably mounted at the end of a spring arm cantilever mounted to one end of an axle. A knob is fixedly mounted to the other end of the axle so that when the knob is rotated the ball is caused to roll across the tou ...


7
Douglas K Tao: Automatic switching of motion control with tactile feedback. The Grass Valley Group, Francis I Gray, August 7, 1990: US04947097 (58 worldwide citation)

A rotary control knob is adapted to provide for automatic switching between two modes of movement control for a tape transport. An insulative ring surrounds a conductive knob, and the conductive knob is electrically connected to an oscillator circuit. Changes in the oscillator frequency due to opera ...


8
Richard B Angell, Kirk M Gramcko: Video preview system for allowing multiple outputs to be viewed simultaneously on the same monitor. The Grass Valley Group, Francis I Gray, John Smith Hill, February 23, 1993: US05189516 (44 worldwide citation)

A multiple video preview system for a production video switcher or digital effects device compresses a plurality of input video signals taken from various points along a video path through the switcher or effects device. The compressed input video signals are stored in a display memory in respective ...


9
Donald R Christensen, Robert Bateman, Thomas A Grancey: Audio mixer architecture using virtual gain control and switching. The Grass Valley Group, Francis I Gray, December 5, 1989: US04885792 (41 worldwide citation)

An audio mixer architecture using virtual gain and switching has a single gain stag in each audio input signal path. A plurality of audio input signals are input to respective audio input channels having two or more active gain elements at the output to provide parallel signal paths for each audio i ...


10
David E Lake Jr, Robert L Miller: Video key glow and border generator. The Grass Valley Group, Francis I Gray, Allston L Jones, October 6, 1987: US04698666 (40 worldwide citation)

A method and apparatus is disclosed which provides for the placement of a border video signal around a selected object in a video image. A video image of the selected object is first inserted into a video image of a selected border video signal in a video mixing process by use of a key signal defini ...