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. 09, 1986
Filed:
Nov. 21, 1983
Applicant:
Inventors:
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358183 ; 358 22 ; 358177 ;
Abstract
A chroma-key tracking apparatus capable of automatically eliminating an unwanted partial spot noise from a chroma-key signal, to enable the generation of a correct frame around a desired portion of a television picture. The apparatus includes a noise eliminating circuit which by use of counters and comparators is capable of eliminating partial spot noises whose size in the horizontal and vertical directions is smaller than a predetermined value.