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:
Apr. 21, 1987
Filed:
Oct. 15, 1985
Jonathan M Schine, Los Angeles, CA (US);
Other;
Abstract
An improved color television transmission compatible with NTSC standards produces a controlled horizontal scan rate at about 15,768 Hz with 227 cycles of color subcarrier per line, and a controlled horizontal scan rate at about 60.070 Hz to produce frames of two interlaced fields each at a rate of about 30.035 Hz with 227.5 cycles of the color subcarrier per field phase shifted 180.degree. of the color subcarrier at the beginning of each field, thereby eliminating 'chroma crawl,' and reducing the size of the teeth in the 'zipper' effect produced by NTSC encoded color at the edge of vertical color borders. The vertical scan rate is controlled by dividing a clock frequency of four times the color subcarrier by four to produce the color subcarrier, and dividing the clock frequency by some set of multiples to produce the horizontal scan rates with 227 cycles of color subcarrier per line plus one-half cycle.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile