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:
Jul. 18, 2000
Filed:
Aug. 28, 1995
Kurt J Otto, Laguna Beach, CA (US);
Lockhead Martin Corporation, Bethesda, MD (US);
Abstract
A 12 bit to 8 bit dynamic range compression processor for compressing video data. The dynamic range compression processor uses a lookup RAM, or dynamic range compression RAM, to update offset and compression terms of each field of video in real time. During the active video period of each field, a 12 bit histogram of video pixel values is collected using a histogram RAM for a specific software defined local area of interest. During the video scan retrace time, the histogram is evaluated and offset and compression terms are computed based on upper and lower breakpoints of the histogram. An algorithm is employed to generate one of 3840 (15 integer and 3825 non-integer) compression slopes. Each compression slope is written into the dynamic range compression RAM starting at the computed offset value and is applied to the next field of video.