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:
Nov. 11, 1980
Filed:
Jan. 05, 1979
Willem H Groeneweg, Ottenbach, CH;
RCA Corporation, New York, NY (US);
Abstract
A SECAM-encoded chrominance signal is converted to a chrominance signal of a quasi-form for further processing in PAL decoder apparatus. Converter includes an FM detector serving to demodulate respective SECAM subcarriers sequentially, and a modulator wherein the color-difference signals recovered by the FM detector amplitude modulate in appropriate sequence quadrature-related phases of subcarrier frequency oscillations derived from the decoder. The color-difference signals supplied to the modulator are augmented by line rate pedestals effecting the insertion of bursts in the quasi-signal developed by the modulator. The phasing of the inserted bursts alternates between a first phase corresponding to the oscillation phase subject to modulation by R-Y color-difference signals, and a second phase differing from the first phase by 180.degree.. Insertion of bursts of the first phase immediately precedes the development of R-Y modulated subcarrier waves by the modulator, while insertion of bursts of the second phase immediately precedes the development of B-Y modulated subcarrier waves by the modulator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile