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:
Dec. 23, 1986
Filed:
Feb. 19, 1985
Rudolf Turner, Vernon Hills, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
In an NTSC television system there are an odd number (262.5) of horizontal lines in each field. This relationship causes a 50% duty cycle horizontal rate signal (H) to be high during one specific horizontal half line in one field and low for that same horizontal half line in the other field. A 2H rate signal is normally divided by 525 with counters to obtain a field rate. The outputs of the counters are combined with a regenerated horizontal rate signal (H) to generate a plurality of unique addresses. This provides a mapping for each field to within a half horizontal line resolution. These addresses can be decoded by a programmable logic device or other devices to define half, single or groups of horizontal lines in one or both fields.