Digital Equipment Corporation

Bose Corporation

Avid Technology Limited

Thx Ltd.

Donald E Nelsen

Barret Lippey

Michael J Rudd

Richard J Hollingsworth

Stephen A Bayes

A video test tool for diagnosing video processing for interlacing is disclosed along with a video test tool for quantifying 'jaggies' in a video display.

Video test tools

Methods, apparatus and system for controlling ambient light to produce controlled ambient light having predefined optical spectrum characteristics in order to effect a modified color gamut of a reflected image that is reflected from a surface. The reflected image including reflected portions of the controlled ambient light and reflected portions of a projected image directed from an image projector to the surface. The reflected image having a first color gamut in the presence of uncontrolled ambient light. The reflected image having the modified color gamut in the presence of the controlled ambient light.

Color gamut improvement in presence of ambient light

The invention overcomes the need to adjust the video level settings of different video capture devices for each source by saving each setting as a difference between the actual setting and a default setting when digitizing source material. These saved differences are called differential settings. An actual setting for another capture device that provides consistent video levels when digitizing the same source may be derived from both the differential setting obtained when digitizing using the first capture device and the default setting of the other capture device. As a result, source material is mapped to consistent internal digital levels when used on the different devices. Accordingly, video characteristics such as gain, black, saturation and hue can be maintained correctly regardless of the unique settings due to manufacturing and calibration tolerances of the different video capture devices.

System and process for maintaining consistent video levels when digitizing video signals using different video capture devices

A chip having field effect transistors which have differing threshold voltages determined in a single masking step and a method of making the chip provides a chip usable at both cryogenic and room temperatures without a costly additionaly masking step. The chip has devices with low threshold voltages that are therefore optimized for performance at low temperatures, and devices with high threshold voltages that are optimized for performance at higher temperatures. Such high threshold voltage devices are also usable, though sub-optimally, at lower temeperatures such as cryogenic temperatures. The two sets of devices have their threshold voltages determined in a single masking step, with the higher threshold voltage values being provided during this step by reducing the width of a device to produce a parasitic effect.

Growing community of inventors

Winchester, MA, United States of America

Donald E Nelsen