The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1993
Filed:
Jan. 21, 1992
Michael L Dorrough, Woodland Hills, CA (US);
Kenneth S Gold, Bell Canyon, CA (US);
H Maurice France, Jr, Palos Verdes Estates, CA (US);
Dorrough Electronics, Woodland Hills, CA (US);
Abstract
For monitoring, metering and dynamically displaying key static and dynamic parameters of composite video signals and visually indicating compliance status relative to important system specifications, this electronic meter is particularly useful in connection with video cameras. In studio environments, the compliance indications supplement existing capabilities, and in remote locations where large, complex and costly CRT type waveform monitors are not feasible, the compactness of this video meter provides an unusual degree of picture quality assurance. A bar/graph type LED display provides two independent scale regions: a sync region dynamically displaying sync amplitude, and a picture region dynamically displaying average picture levels in a bar mode and peak levels in a dot mode. The response times of the sync, average and peak level are selectable. Peak indications are lengthened to a display time which is optimal for human response to short term events. A monochrome video meter embodiment displays average luminance levels in a bar mode and peak luminance levels in a dot mode. Presence/absence of sync is indicated by a bi-color LED. Additional parameter status may be indicated by a panel-mounted bi-color LED which provides four indication modes. For color video, a chrominance embodiment, used along with the monochrome embodiment and similarly packaged, displays color burst amplitude and average chrominance in a bar mode, peak chrominance in a dot mode, and optionally monitors color burst phase relative to horizontal sync.